1 /*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 * Copyright (c) 2008 Red Hat Inc.
5 *
6 * DRM core CRTC related functions
7 *
8 * Permission to use, copy, modify, distribute, and sell this software and its
9 * documentation for any purpose is hereby granted without fee, provided that
10 * the above copyright notice appear in all copies and that both that copyright
11 * notice and this permission notice appear in supporting documentation, and
12 * that the name of the copyright holders not be used in advertising or
13 * publicity pertaining to distribution of the software without specific,
14 * written prior permission. The copyright holders make no representations
15 * about the suitability of this software for any purpose. It is provided "as
16 * is" without express or implied warranty.
17 *
18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 *
26 * Authors:
27 * Keith Packard
28 * Eric Anholt <eric@anholt.net>
29 * Dave Airlie <airlied@linux.ie>
30 * Jesse Barnes <jesse.barnes@intel.com>
31 */
32 #include <linux/ctype.h>
33 #include <linux/list.h>
34 #include <linux/slab.h>
35 #include <linux/export.h>
36 #include <drm/drmP.h>
37 #include <drm/drm_crtc.h>
38 #include <drm/drm_edid.h>
39 #include <drm/drm_fourcc.h>
40 #include <drm/drm_modeset_lock.h>
41 #include <drm/drm_atomic.h>
42
43 #include "drm_crtc_internal.h"
44 #include "drm_internal.h"
45
46 static struct drm_framebuffer *
47 internal_framebuffer_create(struct drm_device *dev,
48 struct drm_mode_fb_cmd2 *r,
49 struct drm_file *file_priv);
50
51 /* Avoid boilerplate. I'm tired of typing. */
52 #define DRM_ENUM_NAME_FN(fnname, list) \
53 const char *fnname(int val) \
54 { \
55 int i; \
56 for (i = 0; i < ARRAY_SIZE(list); i++) { \
57 if (list[i].type == val) \
58 return list[i].name; \
59 } \
60 return "(unknown)"; \
61 }
62
63 /*
64 * Global properties
65 */
66 static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
67 { DRM_MODE_DPMS_ON, "On" },
68 { DRM_MODE_DPMS_STANDBY, "Standby" },
69 { DRM_MODE_DPMS_SUSPEND, "Suspend" },
70 { DRM_MODE_DPMS_OFF, "Off" }
71 };
72
73 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
74
75 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
76 { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
77 { DRM_PLANE_TYPE_PRIMARY, "Primary" },
78 { DRM_PLANE_TYPE_CURSOR, "Cursor" },
79 };
80
81 /*
82 * Optional properties
83 */
84 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
85 { DRM_MODE_SCALE_NONE, "None" },
86 { DRM_MODE_SCALE_FULLSCREEN, "Full" },
87 { DRM_MODE_SCALE_CENTER, "Center" },
88 { DRM_MODE_SCALE_ASPECT, "Full aspect" },
89 };
90
91 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
92 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
93 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
94 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
95 };
96
97 /*
98 * Non-global properties, but "required" for certain connectors.
99 */
100 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
101 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
102 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
103 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
104 };
105
106 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
107
108 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
109 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
110 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
111 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
112 };
113
114 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
115 drm_dvi_i_subconnector_enum_list)
116
117 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
118 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
119 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
120 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
121 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
122 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
123 };
124
125 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
126
127 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
128 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
129 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
130 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
131 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
132 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
133 };
134
135 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
136 drm_tv_subconnector_enum_list)
137
138 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
139 { DRM_MODE_DIRTY_OFF, "Off" },
140 { DRM_MODE_DIRTY_ON, "On" },
141 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
142 };
143
144 struct drm_conn_prop_enum_list {
145 int type;
146 const char *name;
147 struct ida ida;
148 };
149
150 /*
151 * Connector and encoder types.
152 */
153 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
154 { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
155 { DRM_MODE_CONNECTOR_VGA, "VGA" },
156 { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
157 { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
158 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
159 { DRM_MODE_CONNECTOR_Composite, "Composite" },
160 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
161 { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
162 { DRM_MODE_CONNECTOR_Component, "Component" },
163 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
164 { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
165 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
166 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
167 { DRM_MODE_CONNECTOR_TV, "TV" },
168 { DRM_MODE_CONNECTOR_eDP, "eDP" },
169 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
170 { DRM_MODE_CONNECTOR_DSI, "DSI" },
171 };
172
173 static const struct drm_prop_enum_list drm_encoder_enum_list[] = {
174 { DRM_MODE_ENCODER_NONE, "None" },
175 { DRM_MODE_ENCODER_DAC, "DAC" },
176 { DRM_MODE_ENCODER_TMDS, "TMDS" },
177 { DRM_MODE_ENCODER_LVDS, "LVDS" },
178 { DRM_MODE_ENCODER_TVDAC, "TV" },
179 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
180 { DRM_MODE_ENCODER_DSI, "DSI" },
181 { DRM_MODE_ENCODER_DPMST, "DP MST" },
182 };
183
184 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
185 { SubPixelUnknown, "Unknown" },
186 { SubPixelHorizontalRGB, "Horizontal RGB" },
187 { SubPixelHorizontalBGR, "Horizontal BGR" },
188 { SubPixelVerticalRGB, "Vertical RGB" },
189 { SubPixelVerticalBGR, "Vertical BGR" },
190 { SubPixelNone, "None" },
191 };
192
drm_connector_ida_init(void)193 void drm_connector_ida_init(void)
194 {
195 int i;
196
197 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
198 ida_init(&drm_connector_enum_list[i].ida);
199 }
200
drm_connector_ida_destroy(void)201 void drm_connector_ida_destroy(void)
202 {
203 int i;
204
205 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
206 ida_destroy(&drm_connector_enum_list[i].ida);
207 }
208
209 /**
210 * drm_get_connector_status_name - return a string for connector status
211 * @status: connector status to compute name of
212 *
213 * In contrast to the other drm_get_*_name functions this one here returns a
214 * const pointer and hence is threadsafe.
215 */
drm_get_connector_status_name(enum drm_connector_status status)216 const char *drm_get_connector_status_name(enum drm_connector_status status)
217 {
218 if (status == connector_status_connected)
219 return "connected";
220 else if (status == connector_status_disconnected)
221 return "disconnected";
222 else
223 return "unknown";
224 }
225 EXPORT_SYMBOL(drm_get_connector_status_name);
226
227 /**
228 * drm_get_subpixel_order_name - return a string for a given subpixel enum
229 * @order: enum of subpixel_order
230 *
231 * Note you could abuse this and return something out of bounds, but that
232 * would be a caller error. No unscrubbed user data should make it here.
233 */
drm_get_subpixel_order_name(enum subpixel_order order)234 const char *drm_get_subpixel_order_name(enum subpixel_order order)
235 {
236 return drm_subpixel_enum_list[order].name;
237 }
238 EXPORT_SYMBOL(drm_get_subpixel_order_name);
239
printable_char(int c)240 static char printable_char(int c)
241 {
242 return isascii(c) && isprint(c) ? c : '?';
243 }
244
245 /**
246 * drm_get_format_name - return a string for drm fourcc format
247 * @format: format to compute name of
248 *
249 * Note that the buffer used by this function is globally shared and owned by
250 * the function itself.
251 *
252 * FIXME: This isn't really multithreading safe.
253 */
drm_get_format_name(uint32_t format)254 const char *drm_get_format_name(uint32_t format)
255 {
256 static char buf[32];
257
258 snprintf(buf, sizeof(buf),
259 "%c%c%c%c %s-endian (0x%08x)",
260 printable_char(format & 0xff),
261 printable_char((format >> 8) & 0xff),
262 printable_char((format >> 16) & 0xff),
263 printable_char((format >> 24) & 0x7f),
264 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
265 format);
266
267 return buf;
268 }
269 EXPORT_SYMBOL(drm_get_format_name);
270
271 /*
272 * Internal function to assign a slot in the object idr and optionally
273 * register the object into the idr.
274 */
drm_mode_object_get_reg(struct drm_device * dev,struct drm_mode_object * obj,uint32_t obj_type,bool register_obj)275 static int drm_mode_object_get_reg(struct drm_device *dev,
276 struct drm_mode_object *obj,
277 uint32_t obj_type,
278 bool register_obj)
279 {
280 int ret;
281
282 mutex_lock(&dev->mode_config.idr_mutex);
283 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL);
284 if (ret >= 0) {
285 /*
286 * Set up the object linking under the protection of the idr
287 * lock so that other users can't see inconsistent state.
288 */
289 obj->id = ret;
290 obj->type = obj_type;
291 }
292 mutex_unlock(&dev->mode_config.idr_mutex);
293
294 return ret < 0 ? ret : 0;
295 }
296
297 /**
298 * drm_mode_object_get - allocate a new modeset identifier
299 * @dev: DRM device
300 * @obj: object pointer, used to generate unique ID
301 * @obj_type: object type
302 *
303 * Create a unique identifier based on @ptr in @dev's identifier space. Used
304 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix
305 * modeset identifiers are _not_ reference counted. Hence don't use this for
306 * reference counted modeset objects like framebuffers.
307 *
308 * Returns:
309 * Zero on success, error code on failure.
310 */
drm_mode_object_get(struct drm_device * dev,struct drm_mode_object * obj,uint32_t obj_type)311 int drm_mode_object_get(struct drm_device *dev,
312 struct drm_mode_object *obj, uint32_t obj_type)
313 {
314 return drm_mode_object_get_reg(dev, obj, obj_type, true);
315 }
316
drm_mode_object_register(struct drm_device * dev,struct drm_mode_object * obj)317 static void drm_mode_object_register(struct drm_device *dev,
318 struct drm_mode_object *obj)
319 {
320 mutex_lock(&dev->mode_config.idr_mutex);
321 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
322 mutex_unlock(&dev->mode_config.idr_mutex);
323 }
324
325 /**
326 * drm_mode_object_put - free a modeset identifer
327 * @dev: DRM device
328 * @object: object to free
329 *
330 * Free @id from @dev's unique identifier pool. Note that despite the _get
331 * postfix modeset identifiers are _not_ reference counted. Hence don't use this
332 * for reference counted modeset objects like framebuffers.
333 */
drm_mode_object_put(struct drm_device * dev,struct drm_mode_object * object)334 void drm_mode_object_put(struct drm_device *dev,
335 struct drm_mode_object *object)
336 {
337 mutex_lock(&dev->mode_config.idr_mutex);
338 idr_remove(&dev->mode_config.crtc_idr, object->id);
339 mutex_unlock(&dev->mode_config.idr_mutex);
340 }
341
_object_find(struct drm_device * dev,uint32_t id,uint32_t type)342 static struct drm_mode_object *_object_find(struct drm_device *dev,
343 uint32_t id, uint32_t type)
344 {
345 struct drm_mode_object *obj = NULL;
346
347 mutex_lock(&dev->mode_config.idr_mutex);
348 obj = idr_find(&dev->mode_config.crtc_idr, id);
349 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
350 obj = NULL;
351 if (obj && obj->id != id)
352 obj = NULL;
353 /* don't leak out unref'd fb's */
354 if (obj &&
355 (obj->type == DRM_MODE_OBJECT_FB ||
356 obj->type == DRM_MODE_OBJECT_BLOB))
357 obj = NULL;
358 mutex_unlock(&dev->mode_config.idr_mutex);
359
360 return obj;
361 }
362
363 /**
364 * drm_mode_object_find - look up a drm object with static lifetime
365 * @dev: drm device
366 * @id: id of the mode object
367 * @type: type of the mode object
368 *
369 * Note that framebuffers cannot be looked up with this functions - since those
370 * are reference counted, they need special treatment. Even with
371 * DRM_MODE_OBJECT_ANY (although that will simply return NULL
372 * rather than WARN_ON()).
373 */
drm_mode_object_find(struct drm_device * dev,uint32_t id,uint32_t type)374 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
375 uint32_t id, uint32_t type)
376 {
377 struct drm_mode_object *obj = NULL;
378
379 /* Framebuffers are reference counted and need their own lookup
380 * function.*/
381 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB);
382 obj = _object_find(dev, id, type);
383 return obj;
384 }
385 EXPORT_SYMBOL(drm_mode_object_find);
386
387 /**
388 * drm_framebuffer_init - initialize a framebuffer
389 * @dev: DRM device
390 * @fb: framebuffer to be initialized
391 * @funcs: ... with these functions
392 *
393 * Allocates an ID for the framebuffer's parent mode object, sets its mode
394 * functions & device file and adds it to the master fd list.
395 *
396 * IMPORTANT:
397 * This functions publishes the fb and makes it available for concurrent access
398 * by other users. Which means by this point the fb _must_ be fully set up -
399 * since all the fb attributes are invariant over its lifetime, no further
400 * locking but only correct reference counting is required.
401 *
402 * Returns:
403 * Zero on success, error code on failure.
404 */
drm_framebuffer_init(struct drm_device * dev,struct drm_framebuffer * fb,const struct drm_framebuffer_funcs * funcs)405 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
406 const struct drm_framebuffer_funcs *funcs)
407 {
408 int ret;
409
410 mutex_lock(&dev->mode_config.fb_lock);
411 kref_init(&fb->refcount);
412 INIT_LIST_HEAD(&fb->filp_head);
413 fb->dev = dev;
414 fb->funcs = funcs;
415
416 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
417 if (ret)
418 goto out;
419
420 dev->mode_config.num_fb++;
421 list_add(&fb->head, &dev->mode_config.fb_list);
422 out:
423 mutex_unlock(&dev->mode_config.fb_lock);
424
425 return ret;
426 }
427 EXPORT_SYMBOL(drm_framebuffer_init);
428
429 /* dev->mode_config.fb_lock must be held! */
__drm_framebuffer_unregister(struct drm_device * dev,struct drm_framebuffer * fb)430 static void __drm_framebuffer_unregister(struct drm_device *dev,
431 struct drm_framebuffer *fb)
432 {
433 mutex_lock(&dev->mode_config.idr_mutex);
434 idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
435 mutex_unlock(&dev->mode_config.idr_mutex);
436
437 fb->base.id = 0;
438 }
439
drm_framebuffer_free(struct kref * kref)440 static void drm_framebuffer_free(struct kref *kref)
441 {
442 struct drm_framebuffer *fb =
443 container_of(kref, struct drm_framebuffer, refcount);
444 struct drm_device *dev = fb->dev;
445
446 /*
447 * The lookup idr holds a weak reference, which has not necessarily been
448 * removed at this point. Check for that.
449 */
450 mutex_lock(&dev->mode_config.fb_lock);
451 if (fb->base.id) {
452 /* Mark fb as reaped and drop idr ref. */
453 __drm_framebuffer_unregister(dev, fb);
454 }
455 mutex_unlock(&dev->mode_config.fb_lock);
456
457 fb->funcs->destroy(fb);
458 }
459
__drm_framebuffer_lookup(struct drm_device * dev,uint32_t id)460 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
461 uint32_t id)
462 {
463 struct drm_mode_object *obj = NULL;
464 struct drm_framebuffer *fb;
465
466 mutex_lock(&dev->mode_config.idr_mutex);
467 obj = idr_find(&dev->mode_config.crtc_idr, id);
468 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
469 fb = NULL;
470 else
471 fb = obj_to_fb(obj);
472 mutex_unlock(&dev->mode_config.idr_mutex);
473
474 return fb;
475 }
476
477 /**
478 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
479 * @dev: drm device
480 * @id: id of the fb object
481 *
482 * If successful, this grabs an additional reference to the framebuffer -
483 * callers need to make sure to eventually unreference the returned framebuffer
484 * again, using @drm_framebuffer_unreference.
485 */
drm_framebuffer_lookup(struct drm_device * dev,uint32_t id)486 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
487 uint32_t id)
488 {
489 struct drm_framebuffer *fb;
490
491 mutex_lock(&dev->mode_config.fb_lock);
492 fb = __drm_framebuffer_lookup(dev, id);
493 if (fb) {
494 if (!kref_get_unless_zero(&fb->refcount))
495 fb = NULL;
496 }
497 mutex_unlock(&dev->mode_config.fb_lock);
498
499 return fb;
500 }
501 EXPORT_SYMBOL(drm_framebuffer_lookup);
502
503 /**
504 * drm_framebuffer_unreference - unref a framebuffer
505 * @fb: framebuffer to unref
506 *
507 * This functions decrements the fb's refcount and frees it if it drops to zero.
508 */
drm_framebuffer_unreference(struct drm_framebuffer * fb)509 void drm_framebuffer_unreference(struct drm_framebuffer *fb)
510 {
511 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
512 kref_put(&fb->refcount, drm_framebuffer_free);
513 }
514 EXPORT_SYMBOL(drm_framebuffer_unreference);
515
516 /**
517 * drm_framebuffer_reference - incr the fb refcnt
518 * @fb: framebuffer
519 *
520 * This functions increments the fb's refcount.
521 */
drm_framebuffer_reference(struct drm_framebuffer * fb)522 void drm_framebuffer_reference(struct drm_framebuffer *fb)
523 {
524 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
525 kref_get(&fb->refcount);
526 }
527 EXPORT_SYMBOL(drm_framebuffer_reference);
528
529 /**
530 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
531 * @fb: fb to unregister
532 *
533 * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
534 * those used for fbdev. Note that the caller must hold a reference of it's own,
535 * i.e. the object may not be destroyed through this call (since it'll lead to a
536 * locking inversion).
537 */
drm_framebuffer_unregister_private(struct drm_framebuffer * fb)538 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
539 {
540 struct drm_device *dev;
541
542 if (!fb)
543 return;
544
545 dev = fb->dev;
546
547 mutex_lock(&dev->mode_config.fb_lock);
548 /* Mark fb as reaped and drop idr ref. */
549 __drm_framebuffer_unregister(dev, fb);
550 mutex_unlock(&dev->mode_config.fb_lock);
551 }
552 EXPORT_SYMBOL(drm_framebuffer_unregister_private);
553
554 /**
555 * drm_framebuffer_cleanup - remove a framebuffer object
556 * @fb: framebuffer to remove
557 *
558 * Cleanup framebuffer. This function is intended to be used from the drivers
559 * ->destroy callback. It can also be used to clean up driver private
560 * framebuffers embedded into a larger structure.
561 *
562 * Note that this function does not remove the fb from active usuage - if it is
563 * still used anywhere, hilarity can ensue since userspace could call getfb on
564 * the id and get back -EINVAL. Obviously no concern at driver unload time.
565 *
566 * Also, the framebuffer will not be removed from the lookup idr - for
567 * user-created framebuffers this will happen in in the rmfb ioctl. For
568 * driver-private objects (e.g. for fbdev) drivers need to explicitly call
569 * drm_framebuffer_unregister_private.
570 */
drm_framebuffer_cleanup(struct drm_framebuffer * fb)571 void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
572 {
573 struct drm_device *dev = fb->dev;
574
575 mutex_lock(&dev->mode_config.fb_lock);
576 list_del(&fb->head);
577 dev->mode_config.num_fb--;
578 mutex_unlock(&dev->mode_config.fb_lock);
579 }
580 EXPORT_SYMBOL(drm_framebuffer_cleanup);
581
582 /**
583 * drm_framebuffer_remove - remove and unreference a framebuffer object
584 * @fb: framebuffer to remove
585 *
586 * Scans all the CRTCs and planes in @dev's mode_config. If they're
587 * using @fb, removes it, setting it to NULL. Then drops the reference to the
588 * passed-in framebuffer. Might take the modeset locks.
589 *
590 * Note that this function optimizes the cleanup away if the caller holds the
591 * last reference to the framebuffer. It is also guaranteed to not take the
592 * modeset locks in this case.
593 */
drm_framebuffer_remove(struct drm_framebuffer * fb)594 void drm_framebuffer_remove(struct drm_framebuffer *fb)
595 {
596 struct drm_device *dev;
597 struct drm_crtc *crtc;
598 struct drm_plane *plane;
599 struct drm_mode_set set;
600 int ret;
601
602 if (!fb)
603 return;
604
605 dev = fb->dev;
606
607 WARN_ON(!list_empty(&fb->filp_head));
608
609 /*
610 * drm ABI mandates that we remove any deleted framebuffers from active
611 * useage. But since most sane clients only remove framebuffers they no
612 * longer need, try to optimize this away.
613 *
614 * Since we're holding a reference ourselves, observing a refcount of 1
615 * means that we're the last holder and can skip it. Also, the refcount
616 * can never increase from 1 again, so we don't need any barriers or
617 * locks.
618 *
619 * Note that userspace could try to race with use and instate a new
620 * usage _after_ we've cleared all current ones. End result will be an
621 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
622 * in this manner.
623 */
624 if (atomic_read(&fb->refcount.refcount) > 1) {
625 drm_modeset_lock_all(dev);
626 /* remove from any CRTC */
627 drm_for_each_crtc(crtc, dev) {
628 if (crtc->primary->fb == fb) {
629 /* should turn off the crtc */
630 memset(&set, 0, sizeof(struct drm_mode_set));
631 set.crtc = crtc;
632 set.fb = NULL;
633 ret = drm_mode_set_config_internal(&set);
634 if (ret)
635 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
636 }
637 }
638
639 drm_for_each_plane(plane, dev) {
640 if (plane->fb == fb)
641 drm_plane_force_disable(plane);
642 }
643 drm_modeset_unlock_all(dev);
644 }
645
646 drm_framebuffer_unreference(fb);
647 }
648 EXPORT_SYMBOL(drm_framebuffer_remove);
649
650 DEFINE_WW_CLASS(crtc_ww_class);
651
652 /**
653 * drm_crtc_init_with_planes - Initialise a new CRTC object with
654 * specified primary and cursor planes.
655 * @dev: DRM device
656 * @crtc: CRTC object to init
657 * @primary: Primary plane for CRTC
658 * @cursor: Cursor plane for CRTC
659 * @funcs: callbacks for the new CRTC
660 *
661 * Inits a new object created as base part of a driver crtc object.
662 *
663 * Returns:
664 * Zero on success, error code on failure.
665 */
drm_crtc_init_with_planes(struct drm_device * dev,struct drm_crtc * crtc,struct drm_plane * primary,struct drm_plane * cursor,const struct drm_crtc_funcs * funcs)666 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
667 struct drm_plane *primary,
668 struct drm_plane *cursor,
669 const struct drm_crtc_funcs *funcs)
670 {
671 struct drm_mode_config *config = &dev->mode_config;
672 int ret;
673
674 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
675 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
676
677 crtc->dev = dev;
678 crtc->funcs = funcs;
679
680 drm_modeset_lock_init(&crtc->mutex);
681 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
682 if (ret)
683 return ret;
684
685 crtc->base.properties = &crtc->properties;
686
687 list_add_tail(&crtc->head, &config->crtc_list);
688 config->num_crtc++;
689
690 crtc->primary = primary;
691 crtc->cursor = cursor;
692 if (primary)
693 primary->possible_crtcs = 1 << drm_crtc_index(crtc);
694 if (cursor)
695 cursor->possible_crtcs = 1 << drm_crtc_index(crtc);
696
697 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
698 drm_object_attach_property(&crtc->base, config->prop_active, 0);
699 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
700 }
701
702 return 0;
703 }
704 EXPORT_SYMBOL(drm_crtc_init_with_planes);
705
706 /**
707 * drm_crtc_cleanup - Clean up the core crtc usage
708 * @crtc: CRTC to cleanup
709 *
710 * This function cleans up @crtc and removes it from the DRM mode setting
711 * core. Note that the function does *not* free the crtc structure itself,
712 * this is the responsibility of the caller.
713 */
drm_crtc_cleanup(struct drm_crtc * crtc)714 void drm_crtc_cleanup(struct drm_crtc *crtc)
715 {
716 struct drm_device *dev = crtc->dev;
717
718 kfree(crtc->gamma_store);
719 crtc->gamma_store = NULL;
720
721 drm_modeset_lock_fini(&crtc->mutex);
722
723 drm_mode_object_put(dev, &crtc->base);
724 list_del(&crtc->head);
725 dev->mode_config.num_crtc--;
726
727 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
728 if (crtc->state && crtc->funcs->atomic_destroy_state)
729 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
730
731 memset(crtc, 0, sizeof(*crtc));
732 }
733 EXPORT_SYMBOL(drm_crtc_cleanup);
734
735 /**
736 * drm_crtc_index - find the index of a registered CRTC
737 * @crtc: CRTC to find index for
738 *
739 * Given a registered CRTC, return the index of that CRTC within a DRM
740 * device's list of CRTCs.
741 */
drm_crtc_index(struct drm_crtc * crtc)742 unsigned int drm_crtc_index(struct drm_crtc *crtc)
743 {
744 unsigned int index = 0;
745 struct drm_crtc *tmp;
746
747 drm_for_each_crtc(tmp, crtc->dev) {
748 if (tmp == crtc)
749 return index;
750
751 index++;
752 }
753
754 BUG();
755 }
756 EXPORT_SYMBOL(drm_crtc_index);
757
758 /*
759 * drm_mode_remove - remove and free a mode
760 * @connector: connector list to modify
761 * @mode: mode to remove
762 *
763 * Remove @mode from @connector's mode list, then free it.
764 */
drm_mode_remove(struct drm_connector * connector,struct drm_display_mode * mode)765 static void drm_mode_remove(struct drm_connector *connector,
766 struct drm_display_mode *mode)
767 {
768 list_del(&mode->head);
769 drm_mode_destroy(connector->dev, mode);
770 }
771
772 /**
773 * drm_display_info_set_bus_formats - set the supported bus formats
774 * @info: display info to store bus formats in
775 * @formats: array containing the supported bus formats
776 * @num_formats: the number of entries in the fmts array
777 *
778 * Store the supported bus formats in display info structure.
779 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
780 * a full list of available formats.
781 */
drm_display_info_set_bus_formats(struct drm_display_info * info,const u32 * formats,unsigned int num_formats)782 int drm_display_info_set_bus_formats(struct drm_display_info *info,
783 const u32 *formats,
784 unsigned int num_formats)
785 {
786 u32 *fmts = NULL;
787
788 if (!formats && num_formats)
789 return -EINVAL;
790
791 if (formats && num_formats) {
792 fmts = kmemdup(formats, sizeof(*formats) * num_formats,
793 GFP_KERNEL);
794 if (!fmts)
795 return -ENOMEM;
796 }
797
798 kfree(info->bus_formats);
799 info->bus_formats = fmts;
800 info->num_bus_formats = num_formats;
801
802 return 0;
803 }
804 EXPORT_SYMBOL(drm_display_info_set_bus_formats);
805
806 /**
807 * drm_connector_get_cmdline_mode - reads the user's cmdline mode
808 * @connector: connector to quwery
809 *
810 * The kernel supports per-connector configration of its consoles through
811 * use of the video= parameter. This function parses that option and
812 * extracts the user's specified mode (or enable/disable status) for a
813 * particular connector. This is typically only used during the early fbdev
814 * setup.
815 */
drm_connector_get_cmdline_mode(struct drm_connector * connector)816 static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
817 {
818 struct drm_cmdline_mode *mode = &connector->cmdline_mode;
819 char *option = NULL;
820
821 if (fb_get_options(connector->name, &option))
822 return;
823
824 if (!drm_mode_parse_command_line_for_connector(option,
825 connector,
826 mode))
827 return;
828
829 if (mode->force) {
830 const char *s;
831
832 switch (mode->force) {
833 case DRM_FORCE_OFF:
834 s = "OFF";
835 break;
836 case DRM_FORCE_ON_DIGITAL:
837 s = "ON - dig";
838 break;
839 default:
840 case DRM_FORCE_ON:
841 s = "ON";
842 break;
843 }
844
845 DRM_INFO("forcing %s connector %s\n", connector->name, s);
846 connector->force = mode->force;
847 }
848
849 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
850 connector->name,
851 mode->xres, mode->yres,
852 mode->refresh_specified ? mode->refresh : 60,
853 mode->rb ? " reduced blanking" : "",
854 mode->margins ? " with margins" : "",
855 mode->interlace ? " interlaced" : "");
856 }
857
858 /**
859 * drm_connector_init - Init a preallocated connector
860 * @dev: DRM device
861 * @connector: the connector to init
862 * @funcs: callbacks for this connector
863 * @connector_type: user visible type of the connector
864 *
865 * Initialises a preallocated connector. Connectors should be
866 * subclassed as part of driver connector objects.
867 *
868 * Returns:
869 * Zero on success, error code on failure.
870 */
drm_connector_init(struct drm_device * dev,struct drm_connector * connector,const struct drm_connector_funcs * funcs,int connector_type)871 int drm_connector_init(struct drm_device *dev,
872 struct drm_connector *connector,
873 const struct drm_connector_funcs *funcs,
874 int connector_type)
875 {
876 struct drm_mode_config *config = &dev->mode_config;
877 int ret;
878 struct ida *connector_ida =
879 &drm_connector_enum_list[connector_type].ida;
880
881 drm_modeset_lock_all(dev);
882
883 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false);
884 if (ret)
885 goto out_unlock;
886
887 connector->base.properties = &connector->properties;
888 connector->dev = dev;
889 connector->funcs = funcs;
890 connector->connector_type = connector_type;
891 connector->connector_type_id =
892 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
893 if (connector->connector_type_id < 0) {
894 ret = connector->connector_type_id;
895 goto out_put;
896 }
897 connector->name =
898 kasprintf(GFP_KERNEL, "%s-%d",
899 drm_connector_enum_list[connector_type].name,
900 connector->connector_type_id);
901 if (!connector->name) {
902 ret = -ENOMEM;
903 goto out_put;
904 }
905
906 INIT_LIST_HEAD(&connector->probed_modes);
907 INIT_LIST_HEAD(&connector->modes);
908 connector->edid_blob_ptr = NULL;
909 connector->status = connector_status_unknown;
910
911 drm_connector_get_cmdline_mode(connector);
912
913 /* We should add connectors at the end to avoid upsetting the connector
914 * index too much. */
915 list_add_tail(&connector->head, &config->connector_list);
916 config->num_connector++;
917
918 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
919 drm_object_attach_property(&connector->base,
920 config->edid_property,
921 0);
922
923 drm_object_attach_property(&connector->base,
924 config->dpms_property, 0);
925
926 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
927 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
928 }
929
930 connector->debugfs_entry = NULL;
931
932 out_put:
933 if (ret)
934 drm_mode_object_put(dev, &connector->base);
935
936 out_unlock:
937 drm_modeset_unlock_all(dev);
938
939 return ret;
940 }
941 EXPORT_SYMBOL(drm_connector_init);
942
943 /**
944 * drm_connector_cleanup - cleans up an initialised connector
945 * @connector: connector to cleanup
946 *
947 * Cleans up the connector but doesn't free the object.
948 */
drm_connector_cleanup(struct drm_connector * connector)949 void drm_connector_cleanup(struct drm_connector *connector)
950 {
951 struct drm_device *dev = connector->dev;
952 struct drm_display_mode *mode, *t;
953
954 if (connector->tile_group) {
955 drm_mode_put_tile_group(dev, connector->tile_group);
956 connector->tile_group = NULL;
957 }
958
959 list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
960 drm_mode_remove(connector, mode);
961
962 list_for_each_entry_safe(mode, t, &connector->modes, head)
963 drm_mode_remove(connector, mode);
964
965 ida_remove(&drm_connector_enum_list[connector->connector_type].ida,
966 connector->connector_type_id);
967
968 kfree(connector->display_info.bus_formats);
969 drm_mode_object_put(dev, &connector->base);
970 kfree(connector->name);
971 connector->name = NULL;
972 list_del(&connector->head);
973 dev->mode_config.num_connector--;
974
975 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
976 if (connector->state && connector->funcs->atomic_destroy_state)
977 connector->funcs->atomic_destroy_state(connector,
978 connector->state);
979
980 memset(connector, 0, sizeof(*connector));
981 }
982 EXPORT_SYMBOL(drm_connector_cleanup);
983
984 /**
985 * drm_connector_index - find the index of a registered connector
986 * @connector: connector to find index for
987 *
988 * Given a registered connector, return the index of that connector within a DRM
989 * device's list of connectors.
990 */
drm_connector_index(struct drm_connector * connector)991 unsigned int drm_connector_index(struct drm_connector *connector)
992 {
993 unsigned int index = 0;
994 struct drm_connector *tmp;
995 struct drm_mode_config *config = &connector->dev->mode_config;
996
997 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
998
999 drm_for_each_connector(tmp, connector->dev) {
1000 if (tmp == connector)
1001 return index;
1002
1003 index++;
1004 }
1005
1006 BUG();
1007 }
1008 EXPORT_SYMBOL(drm_connector_index);
1009
1010 /**
1011 * drm_connector_register - register a connector
1012 * @connector: the connector to register
1013 *
1014 * Register userspace interfaces for a connector
1015 *
1016 * Returns:
1017 * Zero on success, error code on failure.
1018 */
drm_connector_register(struct drm_connector * connector)1019 int drm_connector_register(struct drm_connector *connector)
1020 {
1021 int ret;
1022
1023 drm_mode_object_register(connector->dev, &connector->base);
1024
1025 ret = drm_sysfs_connector_add(connector);
1026 if (ret)
1027 return ret;
1028
1029 ret = drm_debugfs_connector_add(connector);
1030 if (ret) {
1031 drm_sysfs_connector_remove(connector);
1032 return ret;
1033 }
1034
1035 return 0;
1036 }
1037 EXPORT_SYMBOL(drm_connector_register);
1038
1039 /**
1040 * drm_connector_unregister - unregister a connector
1041 * @connector: the connector to unregister
1042 *
1043 * Unregister userspace interfaces for a connector
1044 */
drm_connector_unregister(struct drm_connector * connector)1045 void drm_connector_unregister(struct drm_connector *connector)
1046 {
1047 drm_sysfs_connector_remove(connector);
1048 drm_debugfs_connector_remove(connector);
1049 }
1050 EXPORT_SYMBOL(drm_connector_unregister);
1051
1052
1053 /**
1054 * drm_connector_unplug_all - unregister connector userspace interfaces
1055 * @dev: drm device
1056 *
1057 * This function unregisters all connector userspace interfaces in sysfs. Should
1058 * be call when the device is disconnected, e.g. from an usb driver's
1059 * ->disconnect callback.
1060 */
drm_connector_unplug_all(struct drm_device * dev)1061 void drm_connector_unplug_all(struct drm_device *dev)
1062 {
1063 struct drm_connector *connector;
1064
1065 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */
1066 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1067 drm_connector_unregister(connector);
1068
1069 }
1070 EXPORT_SYMBOL(drm_connector_unplug_all);
1071
1072 /**
1073 * drm_encoder_init - Init a preallocated encoder
1074 * @dev: drm device
1075 * @encoder: the encoder to init
1076 * @funcs: callbacks for this encoder
1077 * @encoder_type: user visible type of the encoder
1078 *
1079 * Initialises a preallocated encoder. Encoder should be
1080 * subclassed as part of driver encoder objects.
1081 *
1082 * Returns:
1083 * Zero on success, error code on failure.
1084 */
drm_encoder_init(struct drm_device * dev,struct drm_encoder * encoder,const struct drm_encoder_funcs * funcs,int encoder_type)1085 int drm_encoder_init(struct drm_device *dev,
1086 struct drm_encoder *encoder,
1087 const struct drm_encoder_funcs *funcs,
1088 int encoder_type)
1089 {
1090 int ret;
1091
1092 drm_modeset_lock_all(dev);
1093
1094 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
1095 if (ret)
1096 goto out_unlock;
1097
1098 encoder->dev = dev;
1099 encoder->encoder_type = encoder_type;
1100 encoder->funcs = funcs;
1101 encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
1102 drm_encoder_enum_list[encoder_type].name,
1103 encoder->base.id);
1104 if (!encoder->name) {
1105 ret = -ENOMEM;
1106 goto out_put;
1107 }
1108
1109 list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
1110 dev->mode_config.num_encoder++;
1111
1112 out_put:
1113 if (ret)
1114 drm_mode_object_put(dev, &encoder->base);
1115
1116 out_unlock:
1117 drm_modeset_unlock_all(dev);
1118
1119 return ret;
1120 }
1121 EXPORT_SYMBOL(drm_encoder_init);
1122
1123 /**
1124 * drm_encoder_cleanup - cleans up an initialised encoder
1125 * @encoder: encoder to cleanup
1126 *
1127 * Cleans up the encoder but doesn't free the object.
1128 */
drm_encoder_cleanup(struct drm_encoder * encoder)1129 void drm_encoder_cleanup(struct drm_encoder *encoder)
1130 {
1131 struct drm_device *dev = encoder->dev;
1132
1133 drm_modeset_lock_all(dev);
1134 drm_mode_object_put(dev, &encoder->base);
1135 kfree(encoder->name);
1136 list_del(&encoder->head);
1137 dev->mode_config.num_encoder--;
1138 drm_modeset_unlock_all(dev);
1139
1140 memset(encoder, 0, sizeof(*encoder));
1141 }
1142 EXPORT_SYMBOL(drm_encoder_cleanup);
1143
1144 /**
1145 * drm_universal_plane_init - Initialize a new universal plane object
1146 * @dev: DRM device
1147 * @plane: plane object to init
1148 * @possible_crtcs: bitmask of possible CRTCs
1149 * @funcs: callbacks for the new plane
1150 * @formats: array of supported formats (%DRM_FORMAT_*)
1151 * @format_count: number of elements in @formats
1152 * @type: type of plane (overlay, primary, cursor)
1153 *
1154 * Initializes a plane object of type @type.
1155 *
1156 * Returns:
1157 * Zero on success, error code on failure.
1158 */
drm_universal_plane_init(struct drm_device * dev,struct drm_plane * plane,unsigned long possible_crtcs,const struct drm_plane_funcs * funcs,const uint32_t * formats,unsigned int format_count,enum drm_plane_type type)1159 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
1160 unsigned long possible_crtcs,
1161 const struct drm_plane_funcs *funcs,
1162 const uint32_t *formats, unsigned int format_count,
1163 enum drm_plane_type type)
1164 {
1165 struct drm_mode_config *config = &dev->mode_config;
1166 int ret;
1167
1168 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
1169 if (ret)
1170 return ret;
1171
1172 drm_modeset_lock_init(&plane->mutex);
1173
1174 plane->base.properties = &plane->properties;
1175 plane->dev = dev;
1176 plane->funcs = funcs;
1177 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
1178 GFP_KERNEL);
1179 if (!plane->format_types) {
1180 DRM_DEBUG_KMS("out of memory when allocating plane\n");
1181 drm_mode_object_put(dev, &plane->base);
1182 return -ENOMEM;
1183 }
1184
1185 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
1186 plane->format_count = format_count;
1187 plane->possible_crtcs = possible_crtcs;
1188 plane->type = type;
1189
1190 list_add_tail(&plane->head, &config->plane_list);
1191 config->num_total_plane++;
1192 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1193 config->num_overlay_plane++;
1194
1195 drm_object_attach_property(&plane->base,
1196 config->plane_type_property,
1197 plane->type);
1198
1199 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
1200 drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
1201 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
1202 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
1203 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
1204 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
1205 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
1206 drm_object_attach_property(&plane->base, config->prop_src_x, 0);
1207 drm_object_attach_property(&plane->base, config->prop_src_y, 0);
1208 drm_object_attach_property(&plane->base, config->prop_src_w, 0);
1209 drm_object_attach_property(&plane->base, config->prop_src_h, 0);
1210 }
1211
1212 return 0;
1213 }
1214 EXPORT_SYMBOL(drm_universal_plane_init);
1215
1216 /**
1217 * drm_plane_init - Initialize a legacy plane
1218 * @dev: DRM device
1219 * @plane: plane object to init
1220 * @possible_crtcs: bitmask of possible CRTCs
1221 * @funcs: callbacks for the new plane
1222 * @formats: array of supported formats (%DRM_FORMAT_*)
1223 * @format_count: number of elements in @formats
1224 * @is_primary: plane type (primary vs overlay)
1225 *
1226 * Legacy API to initialize a DRM plane.
1227 *
1228 * New drivers should call drm_universal_plane_init() instead.
1229 *
1230 * Returns:
1231 * Zero on success, error code on failure.
1232 */
drm_plane_init(struct drm_device * dev,struct drm_plane * plane,unsigned long possible_crtcs,const struct drm_plane_funcs * funcs,const uint32_t * formats,unsigned int format_count,bool is_primary)1233 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
1234 unsigned long possible_crtcs,
1235 const struct drm_plane_funcs *funcs,
1236 const uint32_t *formats, unsigned int format_count,
1237 bool is_primary)
1238 {
1239 enum drm_plane_type type;
1240
1241 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
1242 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
1243 formats, format_count, type);
1244 }
1245 EXPORT_SYMBOL(drm_plane_init);
1246
1247 /**
1248 * drm_plane_cleanup - Clean up the core plane usage
1249 * @plane: plane to cleanup
1250 *
1251 * This function cleans up @plane and removes it from the DRM mode setting
1252 * core. Note that the function does *not* free the plane structure itself,
1253 * this is the responsibility of the caller.
1254 */
drm_plane_cleanup(struct drm_plane * plane)1255 void drm_plane_cleanup(struct drm_plane *plane)
1256 {
1257 struct drm_device *dev = plane->dev;
1258
1259 drm_modeset_lock_all(dev);
1260 kfree(plane->format_types);
1261 drm_mode_object_put(dev, &plane->base);
1262
1263 BUG_ON(list_empty(&plane->head));
1264
1265 list_del(&plane->head);
1266 dev->mode_config.num_total_plane--;
1267 if (plane->type == DRM_PLANE_TYPE_OVERLAY)
1268 dev->mode_config.num_overlay_plane--;
1269 drm_modeset_unlock_all(dev);
1270
1271 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
1272 if (plane->state && plane->funcs->atomic_destroy_state)
1273 plane->funcs->atomic_destroy_state(plane, plane->state);
1274
1275 memset(plane, 0, sizeof(*plane));
1276 }
1277 EXPORT_SYMBOL(drm_plane_cleanup);
1278
1279 /**
1280 * drm_plane_index - find the index of a registered plane
1281 * @plane: plane to find index for
1282 *
1283 * Given a registered plane, return the index of that CRTC within a DRM
1284 * device's list of planes.
1285 */
drm_plane_index(struct drm_plane * plane)1286 unsigned int drm_plane_index(struct drm_plane *plane)
1287 {
1288 unsigned int index = 0;
1289 struct drm_plane *tmp;
1290
1291 drm_for_each_plane(tmp, plane->dev) {
1292 if (tmp == plane)
1293 return index;
1294
1295 index++;
1296 }
1297
1298 BUG();
1299 }
1300 EXPORT_SYMBOL(drm_plane_index);
1301
1302 /**
1303 * drm_plane_from_index - find the registered plane at an index
1304 * @dev: DRM device
1305 * @idx: index of registered plane to find for
1306 *
1307 * Given a plane index, return the registered plane from DRM device's
1308 * list of planes with matching index.
1309 */
1310 struct drm_plane *
drm_plane_from_index(struct drm_device * dev,int idx)1311 drm_plane_from_index(struct drm_device *dev, int idx)
1312 {
1313 struct drm_plane *plane;
1314 unsigned int i = 0;
1315
1316 drm_for_each_plane(plane, dev) {
1317 if (i == idx)
1318 return plane;
1319 i++;
1320 }
1321 return NULL;
1322 }
1323 EXPORT_SYMBOL(drm_plane_from_index);
1324
1325 /**
1326 * drm_plane_force_disable - Forcibly disable a plane
1327 * @plane: plane to disable
1328 *
1329 * Forces the plane to be disabled.
1330 *
1331 * Used when the plane's current framebuffer is destroyed,
1332 * and when restoring fbdev mode.
1333 */
drm_plane_force_disable(struct drm_plane * plane)1334 void drm_plane_force_disable(struct drm_plane *plane)
1335 {
1336 int ret;
1337
1338 if (!plane->fb)
1339 return;
1340
1341 plane->old_fb = plane->fb;
1342 ret = plane->funcs->disable_plane(plane);
1343 if (ret) {
1344 DRM_ERROR("failed to disable plane with busy fb\n");
1345 plane->old_fb = NULL;
1346 return;
1347 }
1348 /* disconnect the plane from the fb and crtc: */
1349 drm_framebuffer_unreference(plane->old_fb);
1350 plane->old_fb = NULL;
1351 plane->fb = NULL;
1352 plane->crtc = NULL;
1353 }
1354 EXPORT_SYMBOL(drm_plane_force_disable);
1355
drm_mode_create_standard_properties(struct drm_device * dev)1356 static int drm_mode_create_standard_properties(struct drm_device *dev)
1357 {
1358 struct drm_property *prop;
1359
1360 /*
1361 * Standard properties (apply to all connectors)
1362 */
1363 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
1364 DRM_MODE_PROP_IMMUTABLE,
1365 "EDID", 0);
1366 if (!prop)
1367 return -ENOMEM;
1368 dev->mode_config.edid_property = prop;
1369
1370 prop = drm_property_create_enum(dev, 0,
1371 "DPMS", drm_dpms_enum_list,
1372 ARRAY_SIZE(drm_dpms_enum_list));
1373 if (!prop)
1374 return -ENOMEM;
1375 dev->mode_config.dpms_property = prop;
1376
1377 prop = drm_property_create(dev,
1378 DRM_MODE_PROP_BLOB |
1379 DRM_MODE_PROP_IMMUTABLE,
1380 "PATH", 0);
1381 if (!prop)
1382 return -ENOMEM;
1383 dev->mode_config.path_property = prop;
1384
1385 prop = drm_property_create(dev,
1386 DRM_MODE_PROP_BLOB |
1387 DRM_MODE_PROP_IMMUTABLE,
1388 "TILE", 0);
1389 if (!prop)
1390 return -ENOMEM;
1391 dev->mode_config.tile_property = prop;
1392
1393 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1394 "type", drm_plane_type_enum_list,
1395 ARRAY_SIZE(drm_plane_type_enum_list));
1396 if (!prop)
1397 return -ENOMEM;
1398 dev->mode_config.plane_type_property = prop;
1399
1400 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1401 "SRC_X", 0, UINT_MAX);
1402 if (!prop)
1403 return -ENOMEM;
1404 dev->mode_config.prop_src_x = prop;
1405
1406 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1407 "SRC_Y", 0, UINT_MAX);
1408 if (!prop)
1409 return -ENOMEM;
1410 dev->mode_config.prop_src_y = prop;
1411
1412 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1413 "SRC_W", 0, UINT_MAX);
1414 if (!prop)
1415 return -ENOMEM;
1416 dev->mode_config.prop_src_w = prop;
1417
1418 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1419 "SRC_H", 0, UINT_MAX);
1420 if (!prop)
1421 return -ENOMEM;
1422 dev->mode_config.prop_src_h = prop;
1423
1424 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
1425 "CRTC_X", INT_MIN, INT_MAX);
1426 if (!prop)
1427 return -ENOMEM;
1428 dev->mode_config.prop_crtc_x = prop;
1429
1430 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
1431 "CRTC_Y", INT_MIN, INT_MAX);
1432 if (!prop)
1433 return -ENOMEM;
1434 dev->mode_config.prop_crtc_y = prop;
1435
1436 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1437 "CRTC_W", 0, INT_MAX);
1438 if (!prop)
1439 return -ENOMEM;
1440 dev->mode_config.prop_crtc_w = prop;
1441
1442 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
1443 "CRTC_H", 0, INT_MAX);
1444 if (!prop)
1445 return -ENOMEM;
1446 dev->mode_config.prop_crtc_h = prop;
1447
1448 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
1449 "FB_ID", DRM_MODE_OBJECT_FB);
1450 if (!prop)
1451 return -ENOMEM;
1452 dev->mode_config.prop_fb_id = prop;
1453
1454 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
1455 "CRTC_ID", DRM_MODE_OBJECT_CRTC);
1456 if (!prop)
1457 return -ENOMEM;
1458 dev->mode_config.prop_crtc_id = prop;
1459
1460 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
1461 "ACTIVE");
1462 if (!prop)
1463 return -ENOMEM;
1464 dev->mode_config.prop_active = prop;
1465
1466 prop = drm_property_create(dev,
1467 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
1468 "MODE_ID", 0);
1469 if (!prop)
1470 return -ENOMEM;
1471 dev->mode_config.prop_mode_id = prop;
1472
1473 return 0;
1474 }
1475
1476 /**
1477 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1478 * @dev: DRM device
1479 *
1480 * Called by a driver the first time a DVI-I connector is made.
1481 */
drm_mode_create_dvi_i_properties(struct drm_device * dev)1482 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1483 {
1484 struct drm_property *dvi_i_selector;
1485 struct drm_property *dvi_i_subconnector;
1486
1487 if (dev->mode_config.dvi_i_select_subconnector_property)
1488 return 0;
1489
1490 dvi_i_selector =
1491 drm_property_create_enum(dev, 0,
1492 "select subconnector",
1493 drm_dvi_i_select_enum_list,
1494 ARRAY_SIZE(drm_dvi_i_select_enum_list));
1495 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1496
1497 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1498 "subconnector",
1499 drm_dvi_i_subconnector_enum_list,
1500 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1501 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1502
1503 return 0;
1504 }
1505 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1506
1507 /**
1508 * drm_create_tv_properties - create TV specific connector properties
1509 * @dev: DRM device
1510 * @num_modes: number of different TV formats (modes) supported
1511 * @modes: array of pointers to strings containing name of each format
1512 *
1513 * Called by a driver's TV initialization routine, this function creates
1514 * the TV specific connector properties for a given device. Caller is
1515 * responsible for allocating a list of format names and passing them to
1516 * this routine.
1517 */
drm_mode_create_tv_properties(struct drm_device * dev,unsigned int num_modes,const char * const modes[])1518 int drm_mode_create_tv_properties(struct drm_device *dev,
1519 unsigned int num_modes,
1520 const char * const modes[])
1521 {
1522 struct drm_property *tv_selector;
1523 struct drm_property *tv_subconnector;
1524 unsigned int i;
1525
1526 if (dev->mode_config.tv_select_subconnector_property)
1527 return 0;
1528
1529 /*
1530 * Basic connector properties
1531 */
1532 tv_selector = drm_property_create_enum(dev, 0,
1533 "select subconnector",
1534 drm_tv_select_enum_list,
1535 ARRAY_SIZE(drm_tv_select_enum_list));
1536 if (!tv_selector)
1537 goto nomem;
1538
1539 dev->mode_config.tv_select_subconnector_property = tv_selector;
1540
1541 tv_subconnector =
1542 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1543 "subconnector",
1544 drm_tv_subconnector_enum_list,
1545 ARRAY_SIZE(drm_tv_subconnector_enum_list));
1546 if (!tv_subconnector)
1547 goto nomem;
1548 dev->mode_config.tv_subconnector_property = tv_subconnector;
1549
1550 /*
1551 * Other, TV specific properties: margins & TV modes.
1552 */
1553 dev->mode_config.tv_left_margin_property =
1554 drm_property_create_range(dev, 0, "left margin", 0, 100);
1555 if (!dev->mode_config.tv_left_margin_property)
1556 goto nomem;
1557
1558 dev->mode_config.tv_right_margin_property =
1559 drm_property_create_range(dev, 0, "right margin", 0, 100);
1560 if (!dev->mode_config.tv_right_margin_property)
1561 goto nomem;
1562
1563 dev->mode_config.tv_top_margin_property =
1564 drm_property_create_range(dev, 0, "top margin", 0, 100);
1565 if (!dev->mode_config.tv_top_margin_property)
1566 goto nomem;
1567
1568 dev->mode_config.tv_bottom_margin_property =
1569 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1570 if (!dev->mode_config.tv_bottom_margin_property)
1571 goto nomem;
1572
1573 dev->mode_config.tv_mode_property =
1574 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1575 "mode", num_modes);
1576 if (!dev->mode_config.tv_mode_property)
1577 goto nomem;
1578
1579 for (i = 0; i < num_modes; i++)
1580 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
1581 i, modes[i]);
1582
1583 dev->mode_config.tv_brightness_property =
1584 drm_property_create_range(dev, 0, "brightness", 0, 100);
1585 if (!dev->mode_config.tv_brightness_property)
1586 goto nomem;
1587
1588 dev->mode_config.tv_contrast_property =
1589 drm_property_create_range(dev, 0, "contrast", 0, 100);
1590 if (!dev->mode_config.tv_contrast_property)
1591 goto nomem;
1592
1593 dev->mode_config.tv_flicker_reduction_property =
1594 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1595 if (!dev->mode_config.tv_flicker_reduction_property)
1596 goto nomem;
1597
1598 dev->mode_config.tv_overscan_property =
1599 drm_property_create_range(dev, 0, "overscan", 0, 100);
1600 if (!dev->mode_config.tv_overscan_property)
1601 goto nomem;
1602
1603 dev->mode_config.tv_saturation_property =
1604 drm_property_create_range(dev, 0, "saturation", 0, 100);
1605 if (!dev->mode_config.tv_saturation_property)
1606 goto nomem;
1607
1608 dev->mode_config.tv_hue_property =
1609 drm_property_create_range(dev, 0, "hue", 0, 100);
1610 if (!dev->mode_config.tv_hue_property)
1611 goto nomem;
1612
1613 return 0;
1614 nomem:
1615 return -ENOMEM;
1616 }
1617 EXPORT_SYMBOL(drm_mode_create_tv_properties);
1618
1619 /**
1620 * drm_mode_create_scaling_mode_property - create scaling mode property
1621 * @dev: DRM device
1622 *
1623 * Called by a driver the first time it's needed, must be attached to desired
1624 * connectors.
1625 */
drm_mode_create_scaling_mode_property(struct drm_device * dev)1626 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1627 {
1628 struct drm_property *scaling_mode;
1629
1630 if (dev->mode_config.scaling_mode_property)
1631 return 0;
1632
1633 scaling_mode =
1634 drm_property_create_enum(dev, 0, "scaling mode",
1635 drm_scaling_mode_enum_list,
1636 ARRAY_SIZE(drm_scaling_mode_enum_list));
1637
1638 dev->mode_config.scaling_mode_property = scaling_mode;
1639
1640 return 0;
1641 }
1642 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1643
1644 /**
1645 * drm_mode_create_aspect_ratio_property - create aspect ratio property
1646 * @dev: DRM device
1647 *
1648 * Called by a driver the first time it's needed, must be attached to desired
1649 * connectors.
1650 *
1651 * Returns:
1652 * Zero on success, negative errno on failure.
1653 */
drm_mode_create_aspect_ratio_property(struct drm_device * dev)1654 int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
1655 {
1656 if (dev->mode_config.aspect_ratio_property)
1657 return 0;
1658
1659 dev->mode_config.aspect_ratio_property =
1660 drm_property_create_enum(dev, 0, "aspect ratio",
1661 drm_aspect_ratio_enum_list,
1662 ARRAY_SIZE(drm_aspect_ratio_enum_list));
1663
1664 if (dev->mode_config.aspect_ratio_property == NULL)
1665 return -ENOMEM;
1666
1667 return 0;
1668 }
1669 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
1670
1671 /**
1672 * drm_mode_create_dirty_property - create dirty property
1673 * @dev: DRM device
1674 *
1675 * Called by a driver the first time it's needed, must be attached to desired
1676 * connectors.
1677 */
drm_mode_create_dirty_info_property(struct drm_device * dev)1678 int drm_mode_create_dirty_info_property(struct drm_device *dev)
1679 {
1680 struct drm_property *dirty_info;
1681
1682 if (dev->mode_config.dirty_info_property)
1683 return 0;
1684
1685 dirty_info =
1686 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1687 "dirty",
1688 drm_dirty_info_enum_list,
1689 ARRAY_SIZE(drm_dirty_info_enum_list));
1690 dev->mode_config.dirty_info_property = dirty_info;
1691
1692 return 0;
1693 }
1694 EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
1695
1696 /**
1697 * drm_mode_create_suggested_offset_properties - create suggests offset properties
1698 * @dev: DRM device
1699 *
1700 * Create the the suggested x/y offset property for connectors.
1701 */
drm_mode_create_suggested_offset_properties(struct drm_device * dev)1702 int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
1703 {
1704 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
1705 return 0;
1706
1707 dev->mode_config.suggested_x_property =
1708 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
1709
1710 dev->mode_config.suggested_y_property =
1711 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
1712
1713 if (dev->mode_config.suggested_x_property == NULL ||
1714 dev->mode_config.suggested_y_property == NULL)
1715 return -ENOMEM;
1716 return 0;
1717 }
1718 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
1719
1720 /**
1721 * drm_mode_getresources - get graphics configuration
1722 * @dev: drm device for the ioctl
1723 * @data: data pointer for the ioctl
1724 * @file_priv: drm file for the ioctl call
1725 *
1726 * Construct a set of configuration description structures and return
1727 * them to the user, including CRTC, connector and framebuffer configuration.
1728 *
1729 * Called by the user via ioctl.
1730 *
1731 * Returns:
1732 * Zero on success, negative errno on failure.
1733 */
drm_mode_getresources(struct drm_device * dev,void * data,struct drm_file * file_priv)1734 int drm_mode_getresources(struct drm_device *dev, void *data,
1735 struct drm_file *file_priv)
1736 {
1737 struct drm_mode_card_res *card_res = data;
1738 struct list_head *lh;
1739 struct drm_framebuffer *fb;
1740 struct drm_connector *connector;
1741 struct drm_crtc *crtc;
1742 struct drm_encoder *encoder;
1743 int ret = 0;
1744 int connector_count = 0;
1745 int crtc_count = 0;
1746 int fb_count = 0;
1747 int encoder_count = 0;
1748 int copied = 0;
1749 uint32_t __user *fb_id;
1750 uint32_t __user *crtc_id;
1751 uint32_t __user *connector_id;
1752 uint32_t __user *encoder_id;
1753
1754 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1755 return -EINVAL;
1756
1757
1758 mutex_lock(&file_priv->fbs_lock);
1759 /*
1760 * For the non-control nodes we need to limit the list of resources
1761 * by IDs in the group list for this node
1762 */
1763 list_for_each(lh, &file_priv->fbs)
1764 fb_count++;
1765
1766 /* handle this in 4 parts */
1767 /* FBs */
1768 if (card_res->count_fbs >= fb_count) {
1769 copied = 0;
1770 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
1771 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
1772 if (put_user(fb->base.id, fb_id + copied)) {
1773 mutex_unlock(&file_priv->fbs_lock);
1774 return -EFAULT;
1775 }
1776 copied++;
1777 }
1778 }
1779 card_res->count_fbs = fb_count;
1780 mutex_unlock(&file_priv->fbs_lock);
1781
1782 /* mode_config.mutex protects the connector list against e.g. DP MST
1783 * connector hot-adding. CRTC/Plane lists are invariant. */
1784 mutex_lock(&dev->mode_config.mutex);
1785 drm_for_each_crtc(crtc, dev)
1786 crtc_count++;
1787
1788 drm_for_each_connector(connector, dev)
1789 connector_count++;
1790
1791 drm_for_each_encoder(encoder, dev)
1792 encoder_count++;
1793
1794 card_res->max_height = dev->mode_config.max_height;
1795 card_res->min_height = dev->mode_config.min_height;
1796 card_res->max_width = dev->mode_config.max_width;
1797 card_res->min_width = dev->mode_config.min_width;
1798
1799 /* CRTCs */
1800 if (card_res->count_crtcs >= crtc_count) {
1801 copied = 0;
1802 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
1803 drm_for_each_crtc(crtc, dev) {
1804 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
1805 if (put_user(crtc->base.id, crtc_id + copied)) {
1806 ret = -EFAULT;
1807 goto out;
1808 }
1809 copied++;
1810 }
1811 }
1812 card_res->count_crtcs = crtc_count;
1813
1814 /* Encoders */
1815 if (card_res->count_encoders >= encoder_count) {
1816 copied = 0;
1817 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
1818 drm_for_each_encoder(encoder, dev) {
1819 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
1820 encoder->name);
1821 if (put_user(encoder->base.id, encoder_id +
1822 copied)) {
1823 ret = -EFAULT;
1824 goto out;
1825 }
1826 copied++;
1827 }
1828 }
1829 card_res->count_encoders = encoder_count;
1830
1831 /* Connectors */
1832 if (card_res->count_connectors >= connector_count) {
1833 copied = 0;
1834 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
1835 drm_for_each_connector(connector, dev) {
1836 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
1837 connector->base.id,
1838 connector->name);
1839 if (put_user(connector->base.id,
1840 connector_id + copied)) {
1841 ret = -EFAULT;
1842 goto out;
1843 }
1844 copied++;
1845 }
1846 }
1847 card_res->count_connectors = connector_count;
1848
1849 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
1850 card_res->count_connectors, card_res->count_encoders);
1851
1852 out:
1853 mutex_unlock(&dev->mode_config.mutex);
1854 return ret;
1855 }
1856
1857 /**
1858 * drm_mode_getcrtc - get CRTC configuration
1859 * @dev: drm device for the ioctl
1860 * @data: data pointer for the ioctl
1861 * @file_priv: drm file for the ioctl call
1862 *
1863 * Construct a CRTC configuration structure to return to the user.
1864 *
1865 * Called by the user via ioctl.
1866 *
1867 * Returns:
1868 * Zero on success, negative errno on failure.
1869 */
drm_mode_getcrtc(struct drm_device * dev,void * data,struct drm_file * file_priv)1870 int drm_mode_getcrtc(struct drm_device *dev,
1871 void *data, struct drm_file *file_priv)
1872 {
1873 struct drm_mode_crtc *crtc_resp = data;
1874 struct drm_crtc *crtc;
1875
1876 if (!drm_core_check_feature(dev, DRIVER_MODESET))
1877 return -EINVAL;
1878
1879 crtc = drm_crtc_find(dev, crtc_resp->crtc_id);
1880 if (!crtc)
1881 return -ENOENT;
1882
1883 drm_modeset_lock_crtc(crtc, crtc->primary);
1884 crtc_resp->gamma_size = crtc->gamma_size;
1885 if (crtc->primary->fb)
1886 crtc_resp->fb_id = crtc->primary->fb->base.id;
1887 else
1888 crtc_resp->fb_id = 0;
1889
1890 if (crtc->state) {
1891 crtc_resp->x = crtc->primary->state->src_x >> 16;
1892 crtc_resp->y = crtc->primary->state->src_y >> 16;
1893 if (crtc->state->enable) {
1894 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
1895 crtc_resp->mode_valid = 1;
1896
1897 } else {
1898 crtc_resp->mode_valid = 0;
1899 }
1900 } else {
1901 crtc_resp->x = crtc->x;
1902 crtc_resp->y = crtc->y;
1903 if (crtc->enabled) {
1904 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
1905 crtc_resp->mode_valid = 1;
1906
1907 } else {
1908 crtc_resp->mode_valid = 0;
1909 }
1910 }
1911 drm_modeset_unlock_crtc(crtc);
1912
1913 return 0;
1914 }
1915
drm_mode_expose_to_userspace(const struct drm_display_mode * mode,const struct drm_file * file_priv)1916 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1917 const struct drm_file *file_priv)
1918 {
1919 /*
1920 * If user-space hasn't configured the driver to expose the stereo 3D
1921 * modes, don't expose them.
1922 */
1923 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1924 return false;
1925
1926 return true;
1927 }
1928
drm_connector_get_encoder(struct drm_connector * connector)1929 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector)
1930 {
1931 /* For atomic drivers only state objects are synchronously updated and
1932 * protected by modeset locks, so check those first. */
1933 if (connector->state)
1934 return connector->state->best_encoder;
1935 return connector->encoder;
1936 }
1937
1938 /* helper for getconnector and getproperties ioctls */
get_properties(struct drm_mode_object * obj,bool atomic,uint32_t __user * prop_ptr,uint64_t __user * prop_values,uint32_t * arg_count_props)1939 static int get_properties(struct drm_mode_object *obj, bool atomic,
1940 uint32_t __user *prop_ptr, uint64_t __user *prop_values,
1941 uint32_t *arg_count_props)
1942 {
1943 int props_count;
1944 int i, ret, copied;
1945
1946 props_count = obj->properties->count;
1947 if (!atomic)
1948 props_count -= obj->properties->atomic_count;
1949
1950 if ((*arg_count_props >= props_count) && props_count) {
1951 for (i = 0, copied = 0; copied < props_count; i++) {
1952 struct drm_property *prop = obj->properties->properties[i];
1953 uint64_t val;
1954
1955 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
1956 continue;
1957
1958 ret = drm_object_property_get_value(obj, prop, &val);
1959 if (ret)
1960 return ret;
1961
1962 if (put_user(prop->base.id, prop_ptr + copied))
1963 return -EFAULT;
1964
1965 if (put_user(val, prop_values + copied))
1966 return -EFAULT;
1967
1968 copied++;
1969 }
1970 }
1971 *arg_count_props = props_count;
1972
1973 return 0;
1974 }
1975
1976 /**
1977 * drm_mode_getconnector - get connector configuration
1978 * @dev: drm device for the ioctl
1979 * @data: data pointer for the ioctl
1980 * @file_priv: drm file for the ioctl call
1981 *
1982 * Construct a connector configuration structure to return to the user.
1983 *
1984 * Called by the user via ioctl.
1985 *
1986 * Returns:
1987 * Zero on success, negative errno on failure.
1988 */
drm_mode_getconnector(struct drm_device * dev,void * data,struct drm_file * file_priv)1989 int drm_mode_getconnector(struct drm_device *dev, void *data,
1990 struct drm_file *file_priv)
1991 {
1992 struct drm_mode_get_connector *out_resp = data;
1993 struct drm_connector *connector;
1994 struct drm_encoder *encoder;
1995 struct drm_display_mode *mode;
1996 int mode_count = 0;
1997 int encoders_count = 0;
1998 int ret = 0;
1999 int copied = 0;
2000 int i;
2001 struct drm_mode_modeinfo u_mode;
2002 struct drm_mode_modeinfo __user *mode_ptr;
2003 uint32_t __user *encoder_ptr;
2004
2005 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2006 return -EINVAL;
2007
2008 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
2009
2010 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
2011
2012 mutex_lock(&dev->mode_config.mutex);
2013
2014 connector = drm_connector_find(dev, out_resp->connector_id);
2015 if (!connector) {
2016 ret = -ENOENT;
2017 goto out_unlock;
2018 }
2019
2020 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
2021 if (connector->encoder_ids[i] != 0)
2022 encoders_count++;
2023
2024 if (out_resp->count_modes == 0) {
2025 connector->funcs->fill_modes(connector,
2026 dev->mode_config.max_width,
2027 dev->mode_config.max_height);
2028 }
2029
2030 /* delayed so we get modes regardless of pre-fill_modes state */
2031 list_for_each_entry(mode, &connector->modes, head)
2032 if (drm_mode_expose_to_userspace(mode, file_priv))
2033 mode_count++;
2034
2035 out_resp->connector_id = connector->base.id;
2036 out_resp->connector_type = connector->connector_type;
2037 out_resp->connector_type_id = connector->connector_type_id;
2038 out_resp->mm_width = connector->display_info.width_mm;
2039 out_resp->mm_height = connector->display_info.height_mm;
2040 out_resp->subpixel = connector->display_info.subpixel_order;
2041 out_resp->connection = connector->status;
2042
2043 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2044 encoder = drm_connector_get_encoder(connector);
2045 if (encoder)
2046 out_resp->encoder_id = encoder->base.id;
2047 else
2048 out_resp->encoder_id = 0;
2049
2050 /*
2051 * This ioctl is called twice, once to determine how much space is
2052 * needed, and the 2nd time to fill it.
2053 */
2054 if ((out_resp->count_modes >= mode_count) && mode_count) {
2055 copied = 0;
2056 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
2057 list_for_each_entry(mode, &connector->modes, head) {
2058 if (!drm_mode_expose_to_userspace(mode, file_priv))
2059 continue;
2060
2061 drm_mode_convert_to_umode(&u_mode, mode);
2062 if (copy_to_user(mode_ptr + copied,
2063 &u_mode, sizeof(u_mode))) {
2064 ret = -EFAULT;
2065 goto out;
2066 }
2067 copied++;
2068 }
2069 }
2070 out_resp->count_modes = mode_count;
2071
2072 ret = get_properties(&connector->base, file_priv->atomic,
2073 (uint32_t __user *)(unsigned long)(out_resp->props_ptr),
2074 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
2075 &out_resp->count_props);
2076 if (ret)
2077 goto out;
2078
2079 if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
2080 copied = 0;
2081 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
2082 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
2083 if (connector->encoder_ids[i] != 0) {
2084 if (put_user(connector->encoder_ids[i],
2085 encoder_ptr + copied)) {
2086 ret = -EFAULT;
2087 goto out;
2088 }
2089 copied++;
2090 }
2091 }
2092 }
2093 out_resp->count_encoders = encoders_count;
2094
2095 out:
2096 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2097
2098 out_unlock:
2099 mutex_unlock(&dev->mode_config.mutex);
2100
2101 return ret;
2102 }
2103
drm_encoder_get_crtc(struct drm_encoder * encoder)2104 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder)
2105 {
2106 struct drm_connector *connector;
2107 struct drm_device *dev = encoder->dev;
2108 bool uses_atomic = false;
2109
2110 /* For atomic drivers only state objects are synchronously updated and
2111 * protected by modeset locks, so check those first. */
2112 drm_for_each_connector(connector, dev) {
2113 if (!connector->state)
2114 continue;
2115
2116 uses_atomic = true;
2117
2118 if (connector->state->best_encoder != encoder)
2119 continue;
2120
2121 return connector->state->crtc;
2122 }
2123
2124 /* Don't return stale data (e.g. pending async disable). */
2125 if (uses_atomic)
2126 return NULL;
2127
2128 return encoder->crtc;
2129 }
2130
2131 /**
2132 * drm_mode_getencoder - get encoder configuration
2133 * @dev: drm device for the ioctl
2134 * @data: data pointer for the ioctl
2135 * @file_priv: drm file for the ioctl call
2136 *
2137 * Construct a encoder configuration structure to return to the user.
2138 *
2139 * Called by the user via ioctl.
2140 *
2141 * Returns:
2142 * Zero on success, negative errno on failure.
2143 */
drm_mode_getencoder(struct drm_device * dev,void * data,struct drm_file * file_priv)2144 int drm_mode_getencoder(struct drm_device *dev, void *data,
2145 struct drm_file *file_priv)
2146 {
2147 struct drm_mode_get_encoder *enc_resp = data;
2148 struct drm_encoder *encoder;
2149 struct drm_crtc *crtc;
2150
2151 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2152 return -EINVAL;
2153
2154 encoder = drm_encoder_find(dev, enc_resp->encoder_id);
2155 if (!encoder)
2156 return -ENOENT;
2157
2158 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
2159 crtc = drm_encoder_get_crtc(encoder);
2160 if (crtc)
2161 enc_resp->crtc_id = crtc->base.id;
2162 else
2163 enc_resp->crtc_id = 0;
2164 drm_modeset_unlock(&dev->mode_config.connection_mutex);
2165
2166 enc_resp->encoder_type = encoder->encoder_type;
2167 enc_resp->encoder_id = encoder->base.id;
2168 enc_resp->possible_crtcs = encoder->possible_crtcs;
2169 enc_resp->possible_clones = encoder->possible_clones;
2170
2171 return 0;
2172 }
2173
2174 /**
2175 * drm_mode_getplane_res - enumerate all plane resources
2176 * @dev: DRM device
2177 * @data: ioctl data
2178 * @file_priv: DRM file info
2179 *
2180 * Construct a list of plane ids to return to the user.
2181 *
2182 * Called by the user via ioctl.
2183 *
2184 * Returns:
2185 * Zero on success, negative errno on failure.
2186 */
drm_mode_getplane_res(struct drm_device * dev,void * data,struct drm_file * file_priv)2187 int drm_mode_getplane_res(struct drm_device *dev, void *data,
2188 struct drm_file *file_priv)
2189 {
2190 struct drm_mode_get_plane_res *plane_resp = data;
2191 struct drm_mode_config *config;
2192 struct drm_plane *plane;
2193 uint32_t __user *plane_ptr;
2194 int copied = 0;
2195 unsigned num_planes;
2196
2197 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2198 return -EINVAL;
2199
2200 config = &dev->mode_config;
2201
2202 if (file_priv->universal_planes)
2203 num_planes = config->num_total_plane;
2204 else
2205 num_planes = config->num_overlay_plane;
2206
2207 /*
2208 * This ioctl is called twice, once to determine how much space is
2209 * needed, and the 2nd time to fill it.
2210 */
2211 if (num_planes &&
2212 (plane_resp->count_planes >= num_planes)) {
2213 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
2214
2215 /* Plane lists are invariant, no locking needed. */
2216 drm_for_each_plane(plane, dev) {
2217 /*
2218 * Unless userspace set the 'universal planes'
2219 * capability bit, only advertise overlays.
2220 */
2221 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
2222 !file_priv->universal_planes)
2223 continue;
2224
2225 if (put_user(plane->base.id, plane_ptr + copied))
2226 return -EFAULT;
2227 copied++;
2228 }
2229 }
2230 plane_resp->count_planes = num_planes;
2231
2232 return 0;
2233 }
2234
2235 /**
2236 * drm_mode_getplane - get plane configuration
2237 * @dev: DRM device
2238 * @data: ioctl data
2239 * @file_priv: DRM file info
2240 *
2241 * Construct a plane configuration structure to return to the user.
2242 *
2243 * Called by the user via ioctl.
2244 *
2245 * Returns:
2246 * Zero on success, negative errno on failure.
2247 */
drm_mode_getplane(struct drm_device * dev,void * data,struct drm_file * file_priv)2248 int drm_mode_getplane(struct drm_device *dev, void *data,
2249 struct drm_file *file_priv)
2250 {
2251 struct drm_mode_get_plane *plane_resp = data;
2252 struct drm_plane *plane;
2253 uint32_t __user *format_ptr;
2254
2255 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2256 return -EINVAL;
2257
2258 plane = drm_plane_find(dev, plane_resp->plane_id);
2259 if (!plane)
2260 return -ENOENT;
2261
2262 drm_modeset_lock(&plane->mutex, NULL);
2263 if (plane->crtc)
2264 plane_resp->crtc_id = plane->crtc->base.id;
2265 else
2266 plane_resp->crtc_id = 0;
2267
2268 if (plane->fb)
2269 plane_resp->fb_id = plane->fb->base.id;
2270 else
2271 plane_resp->fb_id = 0;
2272 drm_modeset_unlock(&plane->mutex);
2273
2274 plane_resp->plane_id = plane->base.id;
2275 plane_resp->possible_crtcs = plane->possible_crtcs;
2276 plane_resp->gamma_size = 0;
2277
2278 /*
2279 * This ioctl is called twice, once to determine how much space is
2280 * needed, and the 2nd time to fill it.
2281 */
2282 if (plane->format_count &&
2283 (plane_resp->count_format_types >= plane->format_count)) {
2284 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
2285 if (copy_to_user(format_ptr,
2286 plane->format_types,
2287 sizeof(uint32_t) * plane->format_count)) {
2288 return -EFAULT;
2289 }
2290 }
2291 plane_resp->count_format_types = plane->format_count;
2292
2293 return 0;
2294 }
2295
2296 /**
2297 * drm_plane_check_pixel_format - Check if the plane supports the pixel format
2298 * @plane: plane to check for format support
2299 * @format: the pixel format
2300 *
2301 * Returns:
2302 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL
2303 * otherwise.
2304 */
drm_plane_check_pixel_format(const struct drm_plane * plane,u32 format)2305 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format)
2306 {
2307 unsigned int i;
2308
2309 for (i = 0; i < plane->format_count; i++) {
2310 if (format == plane->format_types[i])
2311 return 0;
2312 }
2313
2314 return -EINVAL;
2315 }
2316
check_src_coords(uint32_t src_x,uint32_t src_y,uint32_t src_w,uint32_t src_h,const struct drm_framebuffer * fb)2317 static int check_src_coords(uint32_t src_x, uint32_t src_y,
2318 uint32_t src_w, uint32_t src_h,
2319 const struct drm_framebuffer *fb)
2320 {
2321 unsigned int fb_width, fb_height;
2322
2323 fb_width = fb->width << 16;
2324 fb_height = fb->height << 16;
2325
2326 /* Make sure source coordinates are inside the fb. */
2327 if (src_w > fb_width ||
2328 src_x > fb_width - src_w ||
2329 src_h > fb_height ||
2330 src_y > fb_height - src_h) {
2331 DRM_DEBUG_KMS("Invalid source coordinates "
2332 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
2333 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10,
2334 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10,
2335 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10,
2336 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10);
2337 return -ENOSPC;
2338 }
2339
2340 return 0;
2341 }
2342
2343 /*
2344 * setplane_internal - setplane handler for internal callers
2345 *
2346 * Note that we assume an extra reference has already been taken on fb. If the
2347 * update fails, this reference will be dropped before return; if it succeeds,
2348 * the previous framebuffer (if any) will be unreferenced instead.
2349 *
2350 * src_{x,y,w,h} are provided in 16.16 fixed point format
2351 */
__setplane_internal(struct drm_plane * plane,struct drm_crtc * crtc,struct drm_framebuffer * fb,int32_t crtc_x,int32_t crtc_y,uint32_t crtc_w,uint32_t crtc_h,uint32_t src_x,uint32_t src_y,uint32_t src_w,uint32_t src_h)2352 static int __setplane_internal(struct drm_plane *plane,
2353 struct drm_crtc *crtc,
2354 struct drm_framebuffer *fb,
2355 int32_t crtc_x, int32_t crtc_y,
2356 uint32_t crtc_w, uint32_t crtc_h,
2357 /* src_{x,y,w,h} values are 16.16 fixed point */
2358 uint32_t src_x, uint32_t src_y,
2359 uint32_t src_w, uint32_t src_h)
2360 {
2361 int ret = 0;
2362
2363 /* No fb means shut it down */
2364 if (!fb) {
2365 plane->old_fb = plane->fb;
2366 ret = plane->funcs->disable_plane(plane);
2367 if (!ret) {
2368 plane->crtc = NULL;
2369 plane->fb = NULL;
2370 } else {
2371 plane->old_fb = NULL;
2372 }
2373 goto out;
2374 }
2375
2376 /* Check whether this plane is usable on this CRTC */
2377 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
2378 DRM_DEBUG_KMS("Invalid crtc for plane\n");
2379 ret = -EINVAL;
2380 goto out;
2381 }
2382
2383 /* Check whether this plane supports the fb pixel format. */
2384 ret = drm_plane_check_pixel_format(plane, fb->pixel_format);
2385 if (ret) {
2386 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2387 drm_get_format_name(fb->pixel_format));
2388 goto out;
2389 }
2390
2391 /* Give drivers some help against integer overflows */
2392 if (crtc_w > INT_MAX ||
2393 crtc_x > INT_MAX - (int32_t) crtc_w ||
2394 crtc_h > INT_MAX ||
2395 crtc_y > INT_MAX - (int32_t) crtc_h) {
2396 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
2397 crtc_w, crtc_h, crtc_x, crtc_y);
2398 ret = -ERANGE;
2399 goto out;
2400 }
2401
2402 ret = check_src_coords(src_x, src_y, src_w, src_h, fb);
2403 if (ret)
2404 goto out;
2405
2406 plane->old_fb = plane->fb;
2407 ret = plane->funcs->update_plane(plane, crtc, fb,
2408 crtc_x, crtc_y, crtc_w, crtc_h,
2409 src_x, src_y, src_w, src_h);
2410 if (!ret) {
2411 plane->crtc = crtc;
2412 plane->fb = fb;
2413 fb = NULL;
2414 } else {
2415 plane->old_fb = NULL;
2416 }
2417
2418 out:
2419 if (fb)
2420 drm_framebuffer_unreference(fb);
2421 if (plane->old_fb)
2422 drm_framebuffer_unreference(plane->old_fb);
2423 plane->old_fb = NULL;
2424
2425 return ret;
2426 }
2427
setplane_internal(struct drm_plane * plane,struct drm_crtc * crtc,struct drm_framebuffer * fb,int32_t crtc_x,int32_t crtc_y,uint32_t crtc_w,uint32_t crtc_h,uint32_t src_x,uint32_t src_y,uint32_t src_w,uint32_t src_h)2428 static int setplane_internal(struct drm_plane *plane,
2429 struct drm_crtc *crtc,
2430 struct drm_framebuffer *fb,
2431 int32_t crtc_x, int32_t crtc_y,
2432 uint32_t crtc_w, uint32_t crtc_h,
2433 /* src_{x,y,w,h} values are 16.16 fixed point */
2434 uint32_t src_x, uint32_t src_y,
2435 uint32_t src_w, uint32_t src_h)
2436 {
2437 int ret;
2438
2439 drm_modeset_lock_all(plane->dev);
2440 ret = __setplane_internal(plane, crtc, fb,
2441 crtc_x, crtc_y, crtc_w, crtc_h,
2442 src_x, src_y, src_w, src_h);
2443 drm_modeset_unlock_all(plane->dev);
2444
2445 return ret;
2446 }
2447
2448 /**
2449 * drm_mode_setplane - configure a plane's configuration
2450 * @dev: DRM device
2451 * @data: ioctl data*
2452 * @file_priv: DRM file info
2453 *
2454 * Set plane configuration, including placement, fb, scaling, and other factors.
2455 * Or pass a NULL fb to disable (planes may be disabled without providing a
2456 * valid crtc).
2457 *
2458 * Returns:
2459 * Zero on success, negative errno on failure.
2460 */
drm_mode_setplane(struct drm_device * dev,void * data,struct drm_file * file_priv)2461 int drm_mode_setplane(struct drm_device *dev, void *data,
2462 struct drm_file *file_priv)
2463 {
2464 struct drm_mode_set_plane *plane_req = data;
2465 struct drm_plane *plane;
2466 struct drm_crtc *crtc = NULL;
2467 struct drm_framebuffer *fb = NULL;
2468
2469 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2470 return -EINVAL;
2471
2472 /*
2473 * First, find the plane, crtc, and fb objects. If not available,
2474 * we don't bother to call the driver.
2475 */
2476 plane = drm_plane_find(dev, plane_req->plane_id);
2477 if (!plane) {
2478 DRM_DEBUG_KMS("Unknown plane ID %d\n",
2479 plane_req->plane_id);
2480 return -ENOENT;
2481 }
2482
2483 if (plane_req->fb_id) {
2484 fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
2485 if (!fb) {
2486 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
2487 plane_req->fb_id);
2488 return -ENOENT;
2489 }
2490
2491 crtc = drm_crtc_find(dev, plane_req->crtc_id);
2492 if (!crtc) {
2493 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
2494 plane_req->crtc_id);
2495 return -ENOENT;
2496 }
2497 }
2498
2499 /*
2500 * setplane_internal will take care of deref'ing either the old or new
2501 * framebuffer depending on success.
2502 */
2503 return setplane_internal(plane, crtc, fb,
2504 plane_req->crtc_x, plane_req->crtc_y,
2505 plane_req->crtc_w, plane_req->crtc_h,
2506 plane_req->src_x, plane_req->src_y,
2507 plane_req->src_w, plane_req->src_h);
2508 }
2509
2510 /**
2511 * drm_mode_set_config_internal - helper to call ->set_config
2512 * @set: modeset config to set
2513 *
2514 * This is a little helper to wrap internal calls to the ->set_config driver
2515 * interface. The only thing it adds is correct refcounting dance.
2516 *
2517 * Returns:
2518 * Zero on success, negative errno on failure.
2519 */
drm_mode_set_config_internal(struct drm_mode_set * set)2520 int drm_mode_set_config_internal(struct drm_mode_set *set)
2521 {
2522 struct drm_crtc *crtc = set->crtc;
2523 struct drm_framebuffer *fb;
2524 struct drm_crtc *tmp;
2525 int ret;
2526
2527 /*
2528 * NOTE: ->set_config can also disable other crtcs (if we steal all
2529 * connectors from it), hence we need to refcount the fbs across all
2530 * crtcs. Atomic modeset will have saner semantics ...
2531 */
2532 drm_for_each_crtc(tmp, crtc->dev)
2533 tmp->primary->old_fb = tmp->primary->fb;
2534
2535 fb = set->fb;
2536
2537 ret = crtc->funcs->set_config(set);
2538 if (ret == 0) {
2539 crtc->primary->crtc = crtc;
2540 crtc->primary->fb = fb;
2541 }
2542
2543 drm_for_each_crtc(tmp, crtc->dev) {
2544 if (tmp->primary->fb)
2545 drm_framebuffer_reference(tmp->primary->fb);
2546 if (tmp->primary->old_fb)
2547 drm_framebuffer_unreference(tmp->primary->old_fb);
2548 tmp->primary->old_fb = NULL;
2549 }
2550
2551 return ret;
2552 }
2553 EXPORT_SYMBOL(drm_mode_set_config_internal);
2554
2555 /**
2556 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode
2557 * @mode: mode to query
2558 * @hdisplay: hdisplay value to fill in
2559 * @vdisplay: vdisplay value to fill in
2560 *
2561 * The vdisplay value will be doubled if the specified mode is a stereo mode of
2562 * the appropriate layout.
2563 */
drm_crtc_get_hv_timing(const struct drm_display_mode * mode,int * hdisplay,int * vdisplay)2564 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
2565 int *hdisplay, int *vdisplay)
2566 {
2567 struct drm_display_mode adjusted;
2568
2569 drm_mode_copy(&adjusted, mode);
2570 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
2571 *hdisplay = adjusted.crtc_hdisplay;
2572 *vdisplay = adjusted.crtc_vdisplay;
2573 }
2574 EXPORT_SYMBOL(drm_crtc_get_hv_timing);
2575
2576 /**
2577 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
2578 * CRTC viewport
2579 * @crtc: CRTC that framebuffer will be displayed on
2580 * @x: x panning
2581 * @y: y panning
2582 * @mode: mode that framebuffer will be displayed under
2583 * @fb: framebuffer to check size of
2584 */
drm_crtc_check_viewport(const struct drm_crtc * crtc,int x,int y,const struct drm_display_mode * mode,const struct drm_framebuffer * fb)2585 int drm_crtc_check_viewport(const struct drm_crtc *crtc,
2586 int x, int y,
2587 const struct drm_display_mode *mode,
2588 const struct drm_framebuffer *fb)
2589
2590 {
2591 int hdisplay, vdisplay;
2592
2593 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay);
2594
2595 if (crtc->state &&
2596 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) |
2597 BIT(DRM_ROTATE_270)))
2598 swap(hdisplay, vdisplay);
2599
2600 return check_src_coords(x << 16, y << 16,
2601 hdisplay << 16, vdisplay << 16, fb);
2602 }
2603 EXPORT_SYMBOL(drm_crtc_check_viewport);
2604
2605 /**
2606 * drm_mode_setcrtc - set CRTC configuration
2607 * @dev: drm device for the ioctl
2608 * @data: data pointer for the ioctl
2609 * @file_priv: drm file for the ioctl call
2610 *
2611 * Build a new CRTC configuration based on user request.
2612 *
2613 * Called by the user via ioctl.
2614 *
2615 * Returns:
2616 * Zero on success, negative errno on failure.
2617 */
drm_mode_setcrtc(struct drm_device * dev,void * data,struct drm_file * file_priv)2618 int drm_mode_setcrtc(struct drm_device *dev, void *data,
2619 struct drm_file *file_priv)
2620 {
2621 struct drm_mode_config *config = &dev->mode_config;
2622 struct drm_mode_crtc *crtc_req = data;
2623 struct drm_crtc *crtc;
2624 struct drm_connector **connector_set = NULL, *connector;
2625 struct drm_framebuffer *fb = NULL;
2626 struct drm_display_mode *mode = NULL;
2627 struct drm_mode_set set;
2628 uint32_t __user *set_connectors_ptr;
2629 int ret;
2630 int i;
2631
2632 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2633 return -EINVAL;
2634
2635 /*
2636 * Universal plane src offsets are only 16.16, prevent havoc for
2637 * drivers using universal plane code internally.
2638 */
2639 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
2640 return -ERANGE;
2641
2642 drm_modeset_lock_all(dev);
2643 crtc = drm_crtc_find(dev, crtc_req->crtc_id);
2644 if (!crtc) {
2645 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
2646 ret = -ENOENT;
2647 goto out;
2648 }
2649 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
2650
2651 if (crtc_req->mode_valid) {
2652 /* If we have a mode we need a framebuffer. */
2653 /* If we pass -1, set the mode with the currently bound fb */
2654 if (crtc_req->fb_id == -1) {
2655 if (!crtc->primary->fb) {
2656 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
2657 ret = -EINVAL;
2658 goto out;
2659 }
2660 fb = crtc->primary->fb;
2661 /* Make refcounting symmetric with the lookup path. */
2662 drm_framebuffer_reference(fb);
2663 } else {
2664 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
2665 if (!fb) {
2666 DRM_DEBUG_KMS("Unknown FB ID%d\n",
2667 crtc_req->fb_id);
2668 ret = -ENOENT;
2669 goto out;
2670 }
2671 }
2672
2673 mode = drm_mode_create(dev);
2674 if (!mode) {
2675 ret = -ENOMEM;
2676 goto out;
2677 }
2678
2679 ret = drm_mode_convert_umode(mode, &crtc_req->mode);
2680 if (ret) {
2681 DRM_DEBUG_KMS("Invalid mode\n");
2682 goto out;
2683 }
2684
2685 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
2686
2687 /*
2688 * Check whether the primary plane supports the fb pixel format.
2689 * Drivers not implementing the universal planes API use a
2690 * default formats list provided by the DRM core which doesn't
2691 * match real hardware capabilities. Skip the check in that
2692 * case.
2693 */
2694 if (!crtc->primary->format_default) {
2695 ret = drm_plane_check_pixel_format(crtc->primary,
2696 fb->pixel_format);
2697 if (ret) {
2698 DRM_DEBUG_KMS("Invalid pixel format %s\n",
2699 drm_get_format_name(fb->pixel_format));
2700 goto out;
2701 }
2702 }
2703
2704 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
2705 mode, fb);
2706 if (ret)
2707 goto out;
2708
2709 }
2710
2711 if (crtc_req->count_connectors == 0 && mode) {
2712 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
2713 ret = -EINVAL;
2714 goto out;
2715 }
2716
2717 if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
2718 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
2719 crtc_req->count_connectors);
2720 ret = -EINVAL;
2721 goto out;
2722 }
2723
2724 if (crtc_req->count_connectors > 0) {
2725 u32 out_id;
2726
2727 /* Avoid unbounded kernel memory allocation */
2728 if (crtc_req->count_connectors > config->num_connector) {
2729 ret = -EINVAL;
2730 goto out;
2731 }
2732
2733 connector_set = kmalloc_array(crtc_req->count_connectors,
2734 sizeof(struct drm_connector *),
2735 GFP_KERNEL);
2736 if (!connector_set) {
2737 ret = -ENOMEM;
2738 goto out;
2739 }
2740
2741 for (i = 0; i < crtc_req->count_connectors; i++) {
2742 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
2743 if (get_user(out_id, &set_connectors_ptr[i])) {
2744 ret = -EFAULT;
2745 goto out;
2746 }
2747
2748 connector = drm_connector_find(dev, out_id);
2749 if (!connector) {
2750 DRM_DEBUG_KMS("Connector id %d unknown\n",
2751 out_id);
2752 ret = -ENOENT;
2753 goto out;
2754 }
2755 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
2756 connector->base.id,
2757 connector->name);
2758
2759 connector_set[i] = connector;
2760 }
2761 }
2762
2763 set.crtc = crtc;
2764 set.x = crtc_req->x;
2765 set.y = crtc_req->y;
2766 set.mode = mode;
2767 set.connectors = connector_set;
2768 set.num_connectors = crtc_req->count_connectors;
2769 set.fb = fb;
2770 ret = drm_mode_set_config_internal(&set);
2771
2772 out:
2773 if (fb)
2774 drm_framebuffer_unreference(fb);
2775
2776 kfree(connector_set);
2777 drm_mode_destroy(dev, mode);
2778 drm_modeset_unlock_all(dev);
2779 return ret;
2780 }
2781
2782 /**
2783 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a
2784 * universal plane handler call
2785 * @crtc: crtc to update cursor for
2786 * @req: data pointer for the ioctl
2787 * @file_priv: drm file for the ioctl call
2788 *
2789 * Legacy cursor ioctl's work directly with driver buffer handles. To
2790 * translate legacy ioctl calls into universal plane handler calls, we need to
2791 * wrap the native buffer handle in a drm_framebuffer.
2792 *
2793 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB
2794 * buffer with a pitch of 4*width; the universal plane interface should be used
2795 * directly in cases where the hardware can support other buffer settings and
2796 * userspace wants to make use of these capabilities.
2797 *
2798 * Returns:
2799 * Zero on success, negative errno on failure.
2800 */
drm_mode_cursor_universal(struct drm_crtc * crtc,struct drm_mode_cursor2 * req,struct drm_file * file_priv)2801 static int drm_mode_cursor_universal(struct drm_crtc *crtc,
2802 struct drm_mode_cursor2 *req,
2803 struct drm_file *file_priv)
2804 {
2805 struct drm_device *dev = crtc->dev;
2806 struct drm_framebuffer *fb = NULL;
2807 struct drm_mode_fb_cmd2 fbreq = {
2808 .width = req->width,
2809 .height = req->height,
2810 .pixel_format = DRM_FORMAT_ARGB8888,
2811 .pitches = { req->width * 4 },
2812 .handles = { req->handle },
2813 };
2814 int32_t crtc_x, crtc_y;
2815 uint32_t crtc_w = 0, crtc_h = 0;
2816 uint32_t src_w = 0, src_h = 0;
2817 int ret = 0;
2818
2819 BUG_ON(!crtc->cursor);
2820 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL);
2821
2822 /*
2823 * Obtain fb we'll be using (either new or existing) and take an extra
2824 * reference to it if fb != null. setplane will take care of dropping
2825 * the reference if the plane update fails.
2826 */
2827 if (req->flags & DRM_MODE_CURSOR_BO) {
2828 if (req->handle) {
2829 fb = internal_framebuffer_create(dev, &fbreq, file_priv);
2830 if (IS_ERR(fb)) {
2831 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
2832 return PTR_ERR(fb);
2833 }
2834 } else {
2835 fb = NULL;
2836 }
2837 } else {
2838 fb = crtc->cursor->fb;
2839 if (fb)
2840 drm_framebuffer_reference(fb);
2841 }
2842
2843 if (req->flags & DRM_MODE_CURSOR_MOVE) {
2844 crtc_x = req->x;
2845 crtc_y = req->y;
2846 } else {
2847 crtc_x = crtc->cursor_x;
2848 crtc_y = crtc->cursor_y;
2849 }
2850
2851 if (fb) {
2852 crtc_w = fb->width;
2853 crtc_h = fb->height;
2854 src_w = fb->width << 16;
2855 src_h = fb->height << 16;
2856 }
2857
2858 /*
2859 * setplane_internal will take care of deref'ing either the old or new
2860 * framebuffer depending on success.
2861 */
2862 ret = __setplane_internal(crtc->cursor, crtc, fb,
2863 crtc_x, crtc_y, crtc_w, crtc_h,
2864 0, 0, src_w, src_h);
2865
2866 /* Update successful; save new cursor position, if necessary */
2867 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
2868 crtc->cursor_x = req->x;
2869 crtc->cursor_y = req->y;
2870 }
2871
2872 return ret;
2873 }
2874
drm_mode_cursor_common(struct drm_device * dev,struct drm_mode_cursor2 * req,struct drm_file * file_priv)2875 static int drm_mode_cursor_common(struct drm_device *dev,
2876 struct drm_mode_cursor2 *req,
2877 struct drm_file *file_priv)
2878 {
2879 struct drm_crtc *crtc;
2880 int ret = 0;
2881
2882 if (!drm_core_check_feature(dev, DRIVER_MODESET))
2883 return -EINVAL;
2884
2885 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
2886 return -EINVAL;
2887
2888 crtc = drm_crtc_find(dev, req->crtc_id);
2889 if (!crtc) {
2890 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
2891 return -ENOENT;
2892 }
2893
2894 /*
2895 * If this crtc has a universal cursor plane, call that plane's update
2896 * handler rather than using legacy cursor handlers.
2897 */
2898 drm_modeset_lock_crtc(crtc, crtc->cursor);
2899 if (crtc->cursor) {
2900 ret = drm_mode_cursor_universal(crtc, req, file_priv);
2901 goto out;
2902 }
2903
2904 if (req->flags & DRM_MODE_CURSOR_BO) {
2905 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
2906 ret = -ENXIO;
2907 goto out;
2908 }
2909 /* Turns off the cursor if handle is 0 */
2910 if (crtc->funcs->cursor_set2)
2911 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
2912 req->width, req->height, req->hot_x, req->hot_y);
2913 else
2914 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
2915 req->width, req->height);
2916 }
2917
2918 if (req->flags & DRM_MODE_CURSOR_MOVE) {
2919 if (crtc->funcs->cursor_move) {
2920 ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
2921 } else {
2922 ret = -EFAULT;
2923 goto out;
2924 }
2925 }
2926 out:
2927 drm_modeset_unlock_crtc(crtc);
2928
2929 return ret;
2930
2931 }
2932
2933
2934 /**
2935 * drm_mode_cursor_ioctl - set CRTC's cursor configuration
2936 * @dev: drm device for the ioctl
2937 * @data: data pointer for the ioctl
2938 * @file_priv: drm file for the ioctl call
2939 *
2940 * Set the cursor configuration based on user request.
2941 *
2942 * Called by the user via ioctl.
2943 *
2944 * Returns:
2945 * Zero on success, negative errno on failure.
2946 */
drm_mode_cursor_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)2947 int drm_mode_cursor_ioctl(struct drm_device *dev,
2948 void *data, struct drm_file *file_priv)
2949 {
2950 struct drm_mode_cursor *req = data;
2951 struct drm_mode_cursor2 new_req;
2952
2953 memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
2954 new_req.hot_x = new_req.hot_y = 0;
2955
2956 return drm_mode_cursor_common(dev, &new_req, file_priv);
2957 }
2958
2959 /**
2960 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration
2961 * @dev: drm device for the ioctl
2962 * @data: data pointer for the ioctl
2963 * @file_priv: drm file for the ioctl call
2964 *
2965 * Set the cursor configuration based on user request. This implements the 2nd
2966 * version of the cursor ioctl, which allows userspace to additionally specify
2967 * the hotspot of the pointer.
2968 *
2969 * Called by the user via ioctl.
2970 *
2971 * Returns:
2972 * Zero on success, negative errno on failure.
2973 */
drm_mode_cursor2_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)2974 int drm_mode_cursor2_ioctl(struct drm_device *dev,
2975 void *data, struct drm_file *file_priv)
2976 {
2977 struct drm_mode_cursor2 *req = data;
2978
2979 return drm_mode_cursor_common(dev, req, file_priv);
2980 }
2981
2982 /**
2983 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description
2984 * @bpp: bits per pixels
2985 * @depth: bit depth per pixel
2986 *
2987 * Computes a drm fourcc pixel format code for the given @bpp/@depth values.
2988 * Useful in fbdev emulation code, since that deals in those values.
2989 */
drm_mode_legacy_fb_format(uint32_t bpp,uint32_t depth)2990 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
2991 {
2992 uint32_t fmt;
2993
2994 switch (bpp) {
2995 case 8:
2996 fmt = DRM_FORMAT_C8;
2997 break;
2998 case 16:
2999 if (depth == 15)
3000 fmt = DRM_FORMAT_XRGB1555;
3001 else
3002 fmt = DRM_FORMAT_RGB565;
3003 break;
3004 case 24:
3005 fmt = DRM_FORMAT_RGB888;
3006 break;
3007 case 32:
3008 if (depth == 24)
3009 fmt = DRM_FORMAT_XRGB8888;
3010 else if (depth == 30)
3011 fmt = DRM_FORMAT_XRGB2101010;
3012 else
3013 fmt = DRM_FORMAT_ARGB8888;
3014 break;
3015 default:
3016 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
3017 fmt = DRM_FORMAT_XRGB8888;
3018 break;
3019 }
3020
3021 return fmt;
3022 }
3023 EXPORT_SYMBOL(drm_mode_legacy_fb_format);
3024
3025 /**
3026 * drm_mode_addfb - add an FB to the graphics configuration
3027 * @dev: drm device for the ioctl
3028 * @data: data pointer for the ioctl
3029 * @file_priv: drm file for the ioctl call
3030 *
3031 * Add a new FB to the specified CRTC, given a user request. This is the
3032 * original addfb ioctl which only supported RGB formats.
3033 *
3034 * Called by the user via ioctl.
3035 *
3036 * Returns:
3037 * Zero on success, negative errno on failure.
3038 */
drm_mode_addfb(struct drm_device * dev,void * data,struct drm_file * file_priv)3039 int drm_mode_addfb(struct drm_device *dev,
3040 void *data, struct drm_file *file_priv)
3041 {
3042 struct drm_mode_fb_cmd *or = data;
3043 struct drm_mode_fb_cmd2 r = {};
3044 int ret;
3045
3046 /* convert to new format and call new ioctl */
3047 r.fb_id = or->fb_id;
3048 r.width = or->width;
3049 r.height = or->height;
3050 r.pitches[0] = or->pitch;
3051 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
3052 r.handles[0] = or->handle;
3053
3054 ret = drm_mode_addfb2(dev, &r, file_priv);
3055 if (ret)
3056 return ret;
3057
3058 or->fb_id = r.fb_id;
3059
3060 return 0;
3061 }
3062
format_check(const struct drm_mode_fb_cmd2 * r)3063 static int format_check(const struct drm_mode_fb_cmd2 *r)
3064 {
3065 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
3066
3067 switch (format) {
3068 case DRM_FORMAT_C8:
3069 case DRM_FORMAT_RGB332:
3070 case DRM_FORMAT_BGR233:
3071 case DRM_FORMAT_XRGB4444:
3072 case DRM_FORMAT_XBGR4444:
3073 case DRM_FORMAT_RGBX4444:
3074 case DRM_FORMAT_BGRX4444:
3075 case DRM_FORMAT_ARGB4444:
3076 case DRM_FORMAT_ABGR4444:
3077 case DRM_FORMAT_RGBA4444:
3078 case DRM_FORMAT_BGRA4444:
3079 case DRM_FORMAT_XRGB1555:
3080 case DRM_FORMAT_XBGR1555:
3081 case DRM_FORMAT_RGBX5551:
3082 case DRM_FORMAT_BGRX5551:
3083 case DRM_FORMAT_ARGB1555:
3084 case DRM_FORMAT_ABGR1555:
3085 case DRM_FORMAT_RGBA5551:
3086 case DRM_FORMAT_BGRA5551:
3087 case DRM_FORMAT_RGB565:
3088 case DRM_FORMAT_BGR565:
3089 case DRM_FORMAT_RGB888:
3090 case DRM_FORMAT_BGR888:
3091 case DRM_FORMAT_XRGB8888:
3092 case DRM_FORMAT_XBGR8888:
3093 case DRM_FORMAT_RGBX8888:
3094 case DRM_FORMAT_BGRX8888:
3095 case DRM_FORMAT_ARGB8888:
3096 case DRM_FORMAT_ABGR8888:
3097 case DRM_FORMAT_RGBA8888:
3098 case DRM_FORMAT_BGRA8888:
3099 case DRM_FORMAT_XRGB2101010:
3100 case DRM_FORMAT_XBGR2101010:
3101 case DRM_FORMAT_RGBX1010102:
3102 case DRM_FORMAT_BGRX1010102:
3103 case DRM_FORMAT_ARGB2101010:
3104 case DRM_FORMAT_ABGR2101010:
3105 case DRM_FORMAT_RGBA1010102:
3106 case DRM_FORMAT_BGRA1010102:
3107 case DRM_FORMAT_YUYV:
3108 case DRM_FORMAT_YVYU:
3109 case DRM_FORMAT_UYVY:
3110 case DRM_FORMAT_VYUY:
3111 case DRM_FORMAT_AYUV:
3112 case DRM_FORMAT_NV12:
3113 case DRM_FORMAT_NV21:
3114 case DRM_FORMAT_NV16:
3115 case DRM_FORMAT_NV61:
3116 case DRM_FORMAT_NV24:
3117 case DRM_FORMAT_NV42:
3118 case DRM_FORMAT_YUV410:
3119 case DRM_FORMAT_YVU410:
3120 case DRM_FORMAT_YUV411:
3121 case DRM_FORMAT_YVU411:
3122 case DRM_FORMAT_YUV420:
3123 case DRM_FORMAT_YVU420:
3124 case DRM_FORMAT_YUV422:
3125 case DRM_FORMAT_YVU422:
3126 case DRM_FORMAT_YUV444:
3127 case DRM_FORMAT_YVU444:
3128 return 0;
3129 default:
3130 DRM_DEBUG_KMS("invalid pixel format %s\n",
3131 drm_get_format_name(r->pixel_format));
3132 return -EINVAL;
3133 }
3134 }
3135
framebuffer_check(const struct drm_mode_fb_cmd2 * r)3136 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
3137 {
3138 int ret, hsub, vsub, num_planes, i;
3139
3140 ret = format_check(r);
3141 if (ret) {
3142 DRM_DEBUG_KMS("bad framebuffer format %s\n",
3143 drm_get_format_name(r->pixel_format));
3144 return ret;
3145 }
3146
3147 hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
3148 vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
3149 num_planes = drm_format_num_planes(r->pixel_format);
3150
3151 if (r->width == 0 || r->width % hsub) {
3152 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width);
3153 return -EINVAL;
3154 }
3155
3156 if (r->height == 0 || r->height % vsub) {
3157 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
3158 return -EINVAL;
3159 }
3160
3161 for (i = 0; i < num_planes; i++) {
3162 unsigned int width = r->width / (i != 0 ? hsub : 1);
3163 unsigned int height = r->height / (i != 0 ? vsub : 1);
3164 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
3165
3166 if (!r->handles[i]) {
3167 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
3168 return -EINVAL;
3169 }
3170
3171 if ((uint64_t) width * cpp > UINT_MAX)
3172 return -ERANGE;
3173
3174 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
3175 return -ERANGE;
3176
3177 if (r->pitches[i] < width * cpp) {
3178 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
3179 return -EINVAL;
3180 }
3181
3182 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {
3183 DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n",
3184 r->modifier[i], i);
3185 return -EINVAL;
3186 }
3187
3188 /* modifier specific checks: */
3189 switch (r->modifier[i]) {
3190 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
3191 /* NOTE: the pitch restriction may be lifted later if it turns
3192 * out that no hw has this restriction:
3193 */
3194 if (r->pixel_format != DRM_FORMAT_NV12 ||
3195 width % 128 || height % 32 ||
3196 r->pitches[i] % 128) {
3197 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i);
3198 return -EINVAL;
3199 }
3200 break;
3201
3202 default:
3203 break;
3204 }
3205 }
3206
3207 for (i = num_planes; i < 4; i++) {
3208 if (r->modifier[i]) {
3209 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i);
3210 return -EINVAL;
3211 }
3212
3213 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */
3214 if (!(r->flags & DRM_MODE_FB_MODIFIERS))
3215 continue;
3216
3217 if (r->handles[i]) {
3218 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i);
3219 return -EINVAL;
3220 }
3221
3222 if (r->pitches[i]) {
3223 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i);
3224 return -EINVAL;
3225 }
3226
3227 if (r->offsets[i]) {
3228 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i);
3229 return -EINVAL;
3230 }
3231 }
3232
3233 return 0;
3234 }
3235
3236 static struct drm_framebuffer *
internal_framebuffer_create(struct drm_device * dev,struct drm_mode_fb_cmd2 * r,struct drm_file * file_priv)3237 internal_framebuffer_create(struct drm_device *dev,
3238 struct drm_mode_fb_cmd2 *r,
3239 struct drm_file *file_priv)
3240 {
3241 struct drm_mode_config *config = &dev->mode_config;
3242 struct drm_framebuffer *fb;
3243 int ret;
3244
3245 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) {
3246 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
3247 return ERR_PTR(-EINVAL);
3248 }
3249
3250 if ((config->min_width > r->width) || (r->width > config->max_width)) {
3251 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
3252 r->width, config->min_width, config->max_width);
3253 return ERR_PTR(-EINVAL);
3254 }
3255 if ((config->min_height > r->height) || (r->height > config->max_height)) {
3256 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
3257 r->height, config->min_height, config->max_height);
3258 return ERR_PTR(-EINVAL);
3259 }
3260
3261 if (r->flags & DRM_MODE_FB_MODIFIERS &&
3262 !dev->mode_config.allow_fb_modifiers) {
3263 DRM_DEBUG_KMS("driver does not support fb modifiers\n");
3264 return ERR_PTR(-EINVAL);
3265 }
3266
3267 ret = framebuffer_check(r);
3268 if (ret)
3269 return ERR_PTR(ret);
3270
3271 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
3272 if (IS_ERR(fb)) {
3273 DRM_DEBUG_KMS("could not create framebuffer\n");
3274 return fb;
3275 }
3276
3277 return fb;
3278 }
3279
3280 /**
3281 * drm_mode_addfb2 - add an FB to the graphics configuration
3282 * @dev: drm device for the ioctl
3283 * @data: data pointer for the ioctl
3284 * @file_priv: drm file for the ioctl call
3285 *
3286 * Add a new FB to the specified CRTC, given a user request with format. This is
3287 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
3288 * and uses fourcc codes as pixel format specifiers.
3289 *
3290 * Called by the user via ioctl.
3291 *
3292 * Returns:
3293 * Zero on success, negative errno on failure.
3294 */
drm_mode_addfb2(struct drm_device * dev,void * data,struct drm_file * file_priv)3295 int drm_mode_addfb2(struct drm_device *dev,
3296 void *data, struct drm_file *file_priv)
3297 {
3298 struct drm_mode_fb_cmd2 *r = data;
3299 struct drm_framebuffer *fb;
3300
3301 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3302 return -EINVAL;
3303
3304 fb = internal_framebuffer_create(dev, r, file_priv);
3305 if (IS_ERR(fb))
3306 return PTR_ERR(fb);
3307
3308 /* Transfer ownership to the filp for reaping on close */
3309
3310 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
3311 mutex_lock(&file_priv->fbs_lock);
3312 r->fb_id = fb->base.id;
3313 list_add(&fb->filp_head, &file_priv->fbs);
3314 mutex_unlock(&file_priv->fbs_lock);
3315
3316 return 0;
3317 }
3318
3319 struct drm_mode_rmfb_work {
3320 struct work_struct work;
3321 struct list_head fbs;
3322 };
3323
drm_mode_rmfb_work_fn(struct work_struct * w)3324 static void drm_mode_rmfb_work_fn(struct work_struct *w)
3325 {
3326 struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work);
3327
3328 while (!list_empty(&arg->fbs)) {
3329 struct drm_framebuffer *fb =
3330 list_first_entry(&arg->fbs, typeof(*fb), filp_head);
3331
3332 list_del_init(&fb->filp_head);
3333 drm_framebuffer_remove(fb);
3334 }
3335 }
3336
3337 /**
3338 * drm_mode_rmfb - remove an FB from the configuration
3339 * @dev: drm device for the ioctl
3340 * @data: data pointer for the ioctl
3341 * @file_priv: drm file for the ioctl call
3342 *
3343 * Remove the FB specified by the user.
3344 *
3345 * Called by the user via ioctl.
3346 *
3347 * Returns:
3348 * Zero on success, negative errno on failure.
3349 */
drm_mode_rmfb(struct drm_device * dev,void * data,struct drm_file * file_priv)3350 int drm_mode_rmfb(struct drm_device *dev,
3351 void *data, struct drm_file *file_priv)
3352 {
3353 struct drm_framebuffer *fb = NULL;
3354 struct drm_framebuffer *fbl = NULL;
3355 uint32_t *id = data;
3356 int found = 0;
3357
3358 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3359 return -EINVAL;
3360
3361 mutex_lock(&file_priv->fbs_lock);
3362 mutex_lock(&dev->mode_config.fb_lock);
3363 fb = __drm_framebuffer_lookup(dev, *id);
3364 if (!fb)
3365 goto fail_lookup;
3366
3367 list_for_each_entry(fbl, &file_priv->fbs, filp_head)
3368 if (fb == fbl)
3369 found = 1;
3370 if (!found)
3371 goto fail_lookup;
3372
3373 list_del_init(&fb->filp_head);
3374 mutex_unlock(&dev->mode_config.fb_lock);
3375 mutex_unlock(&file_priv->fbs_lock);
3376
3377 /*
3378 * we now own the reference that was stored in the fbs list
3379 *
3380 * drm_framebuffer_remove may fail with -EINTR on pending signals,
3381 * so run this in a separate stack as there's no way to correctly
3382 * handle this after the fb is already removed from the lookup table.
3383 */
3384 if (atomic_read(&fb->refcount.refcount) > 1) {
3385 struct drm_mode_rmfb_work arg;
3386
3387 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn);
3388 INIT_LIST_HEAD(&arg.fbs);
3389 list_add_tail(&fb->filp_head, &arg.fbs);
3390
3391 schedule_work(&arg.work);
3392 flush_work(&arg.work);
3393 destroy_work_on_stack(&arg.work);
3394 } else
3395 drm_framebuffer_unreference(fb);
3396
3397 return 0;
3398
3399 fail_lookup:
3400 mutex_unlock(&dev->mode_config.fb_lock);
3401 mutex_unlock(&file_priv->fbs_lock);
3402
3403 return -ENOENT;
3404 }
3405
3406 /**
3407 * drm_mode_getfb - get FB info
3408 * @dev: drm device for the ioctl
3409 * @data: data pointer for the ioctl
3410 * @file_priv: drm file for the ioctl call
3411 *
3412 * Lookup the FB given its ID and return info about it.
3413 *
3414 * Called by the user via ioctl.
3415 *
3416 * Returns:
3417 * Zero on success, negative errno on failure.
3418 */
drm_mode_getfb(struct drm_device * dev,void * data,struct drm_file * file_priv)3419 int drm_mode_getfb(struct drm_device *dev,
3420 void *data, struct drm_file *file_priv)
3421 {
3422 struct drm_mode_fb_cmd *r = data;
3423 struct drm_framebuffer *fb;
3424 int ret;
3425
3426 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3427 return -EINVAL;
3428
3429 fb = drm_framebuffer_lookup(dev, r->fb_id);
3430 if (!fb)
3431 return -ENOENT;
3432
3433 r->height = fb->height;
3434 r->width = fb->width;
3435 r->depth = fb->depth;
3436 r->bpp = fb->bits_per_pixel;
3437 r->pitch = fb->pitches[0];
3438 if (fb->funcs->create_handle) {
3439 if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
3440 drm_is_control_client(file_priv)) {
3441 ret = fb->funcs->create_handle(fb, file_priv,
3442 &r->handle);
3443 } else {
3444 /* GET_FB() is an unprivileged ioctl so we must not
3445 * return a buffer-handle to non-master processes! For
3446 * backwards-compatibility reasons, we cannot make
3447 * GET_FB() privileged, so just return an invalid handle
3448 * for non-masters. */
3449 r->handle = 0;
3450 ret = 0;
3451 }
3452 } else {
3453 ret = -ENODEV;
3454 }
3455
3456 drm_framebuffer_unreference(fb);
3457
3458 return ret;
3459 }
3460
3461 /**
3462 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
3463 * @dev: drm device for the ioctl
3464 * @data: data pointer for the ioctl
3465 * @file_priv: drm file for the ioctl call
3466 *
3467 * Lookup the FB and flush out the damaged area supplied by userspace as a clip
3468 * rectangle list. Generic userspace which does frontbuffer rendering must call
3469 * this ioctl to flush out the changes on manual-update display outputs, e.g.
3470 * usb display-link, mipi manual update panels or edp panel self refresh modes.
3471 *
3472 * Modesetting drivers which always update the frontbuffer do not need to
3473 * implement the corresponding ->dirty framebuffer callback.
3474 *
3475 * Called by the user via ioctl.
3476 *
3477 * Returns:
3478 * Zero on success, negative errno on failure.
3479 */
drm_mode_dirtyfb_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)3480 int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
3481 void *data, struct drm_file *file_priv)
3482 {
3483 struct drm_clip_rect __user *clips_ptr;
3484 struct drm_clip_rect *clips = NULL;
3485 struct drm_mode_fb_dirty_cmd *r = data;
3486 struct drm_framebuffer *fb;
3487 unsigned flags;
3488 int num_clips;
3489 int ret;
3490
3491 if (!drm_core_check_feature(dev, DRIVER_MODESET))
3492 return -EINVAL;
3493
3494 fb = drm_framebuffer_lookup(dev, r->fb_id);
3495 if (!fb)
3496 return -ENOENT;
3497
3498 num_clips = r->num_clips;
3499 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
3500
3501 if (!num_clips != !clips_ptr) {
3502 ret = -EINVAL;
3503 goto out_err1;
3504 }
3505
3506 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
3507
3508 /* If userspace annotates copy, clips must come in pairs */
3509 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
3510 ret = -EINVAL;
3511 goto out_err1;
3512 }
3513
3514 if (num_clips && clips_ptr) {
3515 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
3516 ret = -EINVAL;
3517 goto out_err1;
3518 }
3519 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
3520 if (!clips) {
3521 ret = -ENOMEM;
3522 goto out_err1;
3523 }
3524
3525 ret = copy_from_user(clips, clips_ptr,
3526 num_clips * sizeof(*clips));
3527 if (ret) {
3528 ret = -EFAULT;
3529 goto out_err2;
3530 }
3531 }
3532
3533 if (fb->funcs->dirty) {
3534 ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
3535 clips, num_clips);
3536 } else {
3537 ret = -ENOSYS;
3538 }
3539
3540 out_err2:
3541 kfree(clips);
3542 out_err1:
3543 drm_framebuffer_unreference(fb);
3544
3545 return ret;
3546 }
3547
3548 /**
3549 * drm_fb_release - remove and free the FBs on this file
3550 * @priv: drm file for the ioctl
3551 *
3552 * Destroy all the FBs associated with @filp.
3553 *
3554 * Called by the user via ioctl.
3555 *
3556 * Returns:
3557 * Zero on success, negative errno on failure.
3558 */
drm_fb_release(struct drm_file * priv)3559 void drm_fb_release(struct drm_file *priv)
3560 {
3561 struct drm_framebuffer *fb, *tfb;
3562 struct drm_mode_rmfb_work arg;
3563
3564 INIT_LIST_HEAD(&arg.fbs);
3565
3566 /*
3567 * When the file gets released that means no one else can access the fb
3568 * list any more, so no need to grab fpriv->fbs_lock. And we need to
3569 * avoid upsetting lockdep since the universal cursor code adds a
3570 * framebuffer while holding mutex locks.
3571 *
3572 * Note that a real deadlock between fpriv->fbs_lock and the modeset
3573 * locks is impossible here since no one else but this function can get
3574 * at it any more.
3575 */
3576 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
3577 if (atomic_read(&fb->refcount.refcount) > 1) {
3578 list_move_tail(&fb->filp_head, &arg.fbs);
3579 } else {
3580 list_del_init(&fb->filp_head);
3581
3582 /* This drops the fpriv->fbs reference. */
3583 drm_framebuffer_unreference(fb);
3584 }
3585 }
3586
3587 if (!list_empty(&arg.fbs)) {
3588 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn);
3589
3590 schedule_work(&arg.work);
3591 flush_work(&arg.work);
3592 destroy_work_on_stack(&arg.work);
3593 }
3594 }
3595
3596 /**
3597 * drm_property_create - create a new property type
3598 * @dev: drm device
3599 * @flags: flags specifying the property type
3600 * @name: name of the property
3601 * @num_values: number of pre-defined values
3602 *
3603 * This creates a new generic drm property which can then be attached to a drm
3604 * object with drm_object_attach_property. The returned property object must be
3605 * freed with drm_property_destroy.
3606 *
3607 * Note that the DRM core keeps a per-device list of properties and that, if
3608 * drm_mode_config_cleanup() is called, it will destroy all properties created
3609 * by the driver.
3610 *
3611 * Returns:
3612 * A pointer to the newly created property on success, NULL on failure.
3613 */
drm_property_create(struct drm_device * dev,int flags,const char * name,int num_values)3614 struct drm_property *drm_property_create(struct drm_device *dev, int flags,
3615 const char *name, int num_values)
3616 {
3617 struct drm_property *property = NULL;
3618 int ret;
3619
3620 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
3621 if (!property)
3622 return NULL;
3623
3624 property->dev = dev;
3625
3626 if (num_values) {
3627 property->values = kcalloc(num_values, sizeof(uint64_t),
3628 GFP_KERNEL);
3629 if (!property->values)
3630 goto fail;
3631 }
3632
3633 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
3634 if (ret)
3635 goto fail;
3636
3637 property->flags = flags;
3638 property->num_values = num_values;
3639 INIT_LIST_HEAD(&property->enum_list);
3640
3641 if (name) {
3642 strncpy(property->name, name, DRM_PROP_NAME_LEN);
3643 property->name[DRM_PROP_NAME_LEN-1] = '\0';
3644 }
3645
3646 list_add_tail(&property->head, &dev->mode_config.property_list);
3647
3648 WARN_ON(!drm_property_type_valid(property));
3649
3650 return property;
3651 fail:
3652 kfree(property->values);
3653 kfree(property);
3654 return NULL;
3655 }
3656 EXPORT_SYMBOL(drm_property_create);
3657
3658 /**
3659 * drm_property_create_enum - create a new enumeration property type
3660 * @dev: drm device
3661 * @flags: flags specifying the property type
3662 * @name: name of the property
3663 * @props: enumeration lists with property values
3664 * @num_values: number of pre-defined values
3665 *
3666 * This creates a new generic drm property which can then be attached to a drm
3667 * object with drm_object_attach_property. The returned property object must be
3668 * freed with drm_property_destroy.
3669 *
3670 * Userspace is only allowed to set one of the predefined values for enumeration
3671 * properties.
3672 *
3673 * Returns:
3674 * A pointer to the newly created property on success, NULL on failure.
3675 */
drm_property_create_enum(struct drm_device * dev,int flags,const char * name,const struct drm_prop_enum_list * props,int num_values)3676 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
3677 const char *name,
3678 const struct drm_prop_enum_list *props,
3679 int num_values)
3680 {
3681 struct drm_property *property;
3682 int i, ret;
3683
3684 flags |= DRM_MODE_PROP_ENUM;
3685
3686 property = drm_property_create(dev, flags, name, num_values);
3687 if (!property)
3688 return NULL;
3689
3690 for (i = 0; i < num_values; i++) {
3691 ret = drm_property_add_enum(property, i,
3692 props[i].type,
3693 props[i].name);
3694 if (ret) {
3695 drm_property_destroy(dev, property);
3696 return NULL;
3697 }
3698 }
3699
3700 return property;
3701 }
3702 EXPORT_SYMBOL(drm_property_create_enum);
3703
3704 /**
3705 * drm_property_create_bitmask - create a new bitmask property type
3706 * @dev: drm device
3707 * @flags: flags specifying the property type
3708 * @name: name of the property
3709 * @props: enumeration lists with property bitflags
3710 * @num_props: size of the @props array
3711 * @supported_bits: bitmask of all supported enumeration values
3712 *
3713 * This creates a new bitmask drm property which can then be attached to a drm
3714 * object with drm_object_attach_property. The returned property object must be
3715 * freed with drm_property_destroy.
3716 *
3717 * Compared to plain enumeration properties userspace is allowed to set any
3718 * or'ed together combination of the predefined property bitflag values
3719 *
3720 * Returns:
3721 * A pointer to the newly created property on success, NULL on failure.
3722 */
drm_property_create_bitmask(struct drm_device * dev,int flags,const char * name,const struct drm_prop_enum_list * props,int num_props,uint64_t supported_bits)3723 struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
3724 int flags, const char *name,
3725 const struct drm_prop_enum_list *props,
3726 int num_props,
3727 uint64_t supported_bits)
3728 {
3729 struct drm_property *property;
3730 int i, ret, index = 0;
3731 int num_values = hweight64(supported_bits);
3732
3733 flags |= DRM_MODE_PROP_BITMASK;
3734
3735 property = drm_property_create(dev, flags, name, num_values);
3736 if (!property)
3737 return NULL;
3738 for (i = 0; i < num_props; i++) {
3739 if (!(supported_bits & (1ULL << props[i].type)))
3740 continue;
3741
3742 if (WARN_ON(index >= num_values)) {
3743 drm_property_destroy(dev, property);
3744 return NULL;
3745 }
3746
3747 ret = drm_property_add_enum(property, index++,
3748 props[i].type,
3749 props[i].name);
3750 if (ret) {
3751 drm_property_destroy(dev, property);
3752 return NULL;
3753 }
3754 }
3755
3756 return property;
3757 }
3758 EXPORT_SYMBOL(drm_property_create_bitmask);
3759
property_create_range(struct drm_device * dev,int flags,const char * name,uint64_t min,uint64_t max)3760 static struct drm_property *property_create_range(struct drm_device *dev,
3761 int flags, const char *name,
3762 uint64_t min, uint64_t max)
3763 {
3764 struct drm_property *property;
3765
3766 property = drm_property_create(dev, flags, name, 2);
3767 if (!property)
3768 return NULL;
3769
3770 property->values[0] = min;
3771 property->values[1] = max;
3772
3773 return property;
3774 }
3775
3776 /**
3777 * drm_property_create_range - create a new unsigned ranged property type
3778 * @dev: drm device
3779 * @flags: flags specifying the property type
3780 * @name: name of the property
3781 * @min: minimum value of the property
3782 * @max: maximum value of the property
3783 *
3784 * This creates a new generic drm property which can then be attached to a drm
3785 * object with drm_object_attach_property. The returned property object must be
3786 * freed with drm_property_destroy.
3787 *
3788 * Userspace is allowed to set any unsigned integer value in the (min, max)
3789 * range inclusive.
3790 *
3791 * Returns:
3792 * A pointer to the newly created property on success, NULL on failure.
3793 */
drm_property_create_range(struct drm_device * dev,int flags,const char * name,uint64_t min,uint64_t max)3794 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
3795 const char *name,
3796 uint64_t min, uint64_t max)
3797 {
3798 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags,
3799 name, min, max);
3800 }
3801 EXPORT_SYMBOL(drm_property_create_range);
3802
3803 /**
3804 * drm_property_create_signed_range - create a new signed ranged property type
3805 * @dev: drm device
3806 * @flags: flags specifying the property type
3807 * @name: name of the property
3808 * @min: minimum value of the property
3809 * @max: maximum value of the property
3810 *
3811 * This creates a new generic drm property which can then be attached to a drm
3812 * object with drm_object_attach_property. The returned property object must be
3813 * freed with drm_property_destroy.
3814 *
3815 * Userspace is allowed to set any signed integer value in the (min, max)
3816 * range inclusive.
3817 *
3818 * Returns:
3819 * A pointer to the newly created property on success, NULL on failure.
3820 */
drm_property_create_signed_range(struct drm_device * dev,int flags,const char * name,int64_t min,int64_t max)3821 struct drm_property *drm_property_create_signed_range(struct drm_device *dev,
3822 int flags, const char *name,
3823 int64_t min, int64_t max)
3824 {
3825 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags,
3826 name, I642U64(min), I642U64(max));
3827 }
3828 EXPORT_SYMBOL(drm_property_create_signed_range);
3829
3830 /**
3831 * drm_property_create_object - create a new object property type
3832 * @dev: drm device
3833 * @flags: flags specifying the property type
3834 * @name: name of the property
3835 * @type: object type from DRM_MODE_OBJECT_* defines
3836 *
3837 * This creates a new generic drm property which can then be attached to a drm
3838 * object with drm_object_attach_property. The returned property object must be
3839 * freed with drm_property_destroy.
3840 *
3841 * Userspace is only allowed to set this to any property value of the given
3842 * @type. Only useful for atomic properties, which is enforced.
3843 *
3844 * Returns:
3845 * A pointer to the newly created property on success, NULL on failure.
3846 */
drm_property_create_object(struct drm_device * dev,int flags,const char * name,uint32_t type)3847 struct drm_property *drm_property_create_object(struct drm_device *dev,
3848 int flags, const char *name, uint32_t type)
3849 {
3850 struct drm_property *property;
3851
3852 flags |= DRM_MODE_PROP_OBJECT;
3853
3854 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC)))
3855 return NULL;
3856
3857 property = drm_property_create(dev, flags, name, 1);
3858 if (!property)
3859 return NULL;
3860
3861 property->values[0] = type;
3862
3863 return property;
3864 }
3865 EXPORT_SYMBOL(drm_property_create_object);
3866
3867 /**
3868 * drm_property_create_bool - create a new boolean property type
3869 * @dev: drm device
3870 * @flags: flags specifying the property type
3871 * @name: name of the property
3872 *
3873 * This creates a new generic drm property which can then be attached to a drm
3874 * object with drm_object_attach_property. The returned property object must be
3875 * freed with drm_property_destroy.
3876 *
3877 * This is implemented as a ranged property with only {0, 1} as valid values.
3878 *
3879 * Returns:
3880 * A pointer to the newly created property on success, NULL on failure.
3881 */
drm_property_create_bool(struct drm_device * dev,int flags,const char * name)3882 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags,
3883 const char *name)
3884 {
3885 return drm_property_create_range(dev, flags, name, 0, 1);
3886 }
3887 EXPORT_SYMBOL(drm_property_create_bool);
3888
3889 /**
3890 * drm_property_add_enum - add a possible value to an enumeration property
3891 * @property: enumeration property to change
3892 * @index: index of the new enumeration
3893 * @value: value of the new enumeration
3894 * @name: symbolic name of the new enumeration
3895 *
3896 * This functions adds enumerations to a property.
3897 *
3898 * It's use is deprecated, drivers should use one of the more specific helpers
3899 * to directly create the property with all enumerations already attached.
3900 *
3901 * Returns:
3902 * Zero on success, error code on failure.
3903 */
drm_property_add_enum(struct drm_property * property,int index,uint64_t value,const char * name)3904 int drm_property_add_enum(struct drm_property *property, int index,
3905 uint64_t value, const char *name)
3906 {
3907 struct drm_property_enum *prop_enum;
3908
3909 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
3910 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)))
3911 return -EINVAL;
3912
3913 /*
3914 * Bitmask enum properties have the additional constraint of values
3915 * from 0 to 63
3916 */
3917 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) &&
3918 (value > 63))
3919 return -EINVAL;
3920
3921 if (!list_empty(&property->enum_list)) {
3922 list_for_each_entry(prop_enum, &property->enum_list, head) {
3923 if (prop_enum->value == value) {
3924 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3925 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3926 return 0;
3927 }
3928 }
3929 }
3930
3931 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
3932 if (!prop_enum)
3933 return -ENOMEM;
3934
3935 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
3936 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
3937 prop_enum->value = value;
3938
3939 property->values[index] = value;
3940 list_add_tail(&prop_enum->head, &property->enum_list);
3941 return 0;
3942 }
3943 EXPORT_SYMBOL(drm_property_add_enum);
3944
3945 /**
3946 * drm_property_destroy - destroy a drm property
3947 * @dev: drm device
3948 * @property: property to destry
3949 *
3950 * This function frees a property including any attached resources like
3951 * enumeration values.
3952 */
drm_property_destroy(struct drm_device * dev,struct drm_property * property)3953 void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
3954 {
3955 struct drm_property_enum *prop_enum, *pt;
3956
3957 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) {
3958 list_del(&prop_enum->head);
3959 kfree(prop_enum);
3960 }
3961
3962 if (property->num_values)
3963 kfree(property->values);
3964 drm_mode_object_put(dev, &property->base);
3965 list_del(&property->head);
3966 kfree(property);
3967 }
3968 EXPORT_SYMBOL(drm_property_destroy);
3969
3970 /**
3971 * drm_object_attach_property - attach a property to a modeset object
3972 * @obj: drm modeset object
3973 * @property: property to attach
3974 * @init_val: initial value of the property
3975 *
3976 * This attaches the given property to the modeset object with the given initial
3977 * value. Currently this function cannot fail since the properties are stored in
3978 * a statically sized array.
3979 */
drm_object_attach_property(struct drm_mode_object * obj,struct drm_property * property,uint64_t init_val)3980 void drm_object_attach_property(struct drm_mode_object *obj,
3981 struct drm_property *property,
3982 uint64_t init_val)
3983 {
3984 int count = obj->properties->count;
3985
3986 if (count == DRM_OBJECT_MAX_PROPERTY) {
3987 WARN(1, "Failed to attach object property (type: 0x%x). Please "
3988 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
3989 "you see this message on the same object type.\n",
3990 obj->type);
3991 return;
3992 }
3993
3994 obj->properties->properties[count] = property;
3995 obj->properties->values[count] = init_val;
3996 obj->properties->count++;
3997 if (property->flags & DRM_MODE_PROP_ATOMIC)
3998 obj->properties->atomic_count++;
3999 }
4000 EXPORT_SYMBOL(drm_object_attach_property);
4001
4002 /**
4003 * drm_object_property_set_value - set the value of a property
4004 * @obj: drm mode object to set property value for
4005 * @property: property to set
4006 * @val: value the property should be set to
4007 *
4008 * This functions sets a given property on a given object. This function only
4009 * changes the software state of the property, it does not call into the
4010 * driver's ->set_property callback.
4011 *
4012 * Returns:
4013 * Zero on success, error code on failure.
4014 */
drm_object_property_set_value(struct drm_mode_object * obj,struct drm_property * property,uint64_t val)4015 int drm_object_property_set_value(struct drm_mode_object *obj,
4016 struct drm_property *property, uint64_t val)
4017 {
4018 int i;
4019
4020 for (i = 0; i < obj->properties->count; i++) {
4021 if (obj->properties->properties[i] == property) {
4022 obj->properties->values[i] = val;
4023 return 0;
4024 }
4025 }
4026
4027 return -EINVAL;
4028 }
4029 EXPORT_SYMBOL(drm_object_property_set_value);
4030
4031 /**
4032 * drm_object_property_get_value - retrieve the value of a property
4033 * @obj: drm mode object to get property value from
4034 * @property: property to retrieve
4035 * @val: storage for the property value
4036 *
4037 * This function retrieves the softare state of the given property for the given
4038 * property. Since there is no driver callback to retrieve the current property
4039 * value this might be out of sync with the hardware, depending upon the driver
4040 * and property.
4041 *
4042 * Returns:
4043 * Zero on success, error code on failure.
4044 */
drm_object_property_get_value(struct drm_mode_object * obj,struct drm_property * property,uint64_t * val)4045 int drm_object_property_get_value(struct drm_mode_object *obj,
4046 struct drm_property *property, uint64_t *val)
4047 {
4048 int i;
4049
4050 /* read-only properties bypass atomic mechanism and still store
4051 * their value in obj->properties->values[].. mostly to avoid
4052 * having to deal w/ EDID and similar props in atomic paths:
4053 */
4054 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) &&
4055 !(property->flags & DRM_MODE_PROP_IMMUTABLE))
4056 return drm_atomic_get_property(obj, property, val);
4057
4058 for (i = 0; i < obj->properties->count; i++) {
4059 if (obj->properties->properties[i] == property) {
4060 *val = obj->properties->values[i];
4061 return 0;
4062 }
4063 }
4064
4065 return -EINVAL;
4066 }
4067 EXPORT_SYMBOL(drm_object_property_get_value);
4068
4069 /**
4070 * drm_mode_getproperty_ioctl - get the property metadata
4071 * @dev: DRM device
4072 * @data: ioctl data
4073 * @file_priv: DRM file info
4074 *
4075 * This function retrieves the metadata for a given property, like the different
4076 * possible values for an enum property or the limits for a range property.
4077 *
4078 * Blob properties are special
4079 *
4080 * Called by the user via ioctl.
4081 *
4082 * Returns:
4083 * Zero on success, negative errno on failure.
4084 */
drm_mode_getproperty_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)4085 int drm_mode_getproperty_ioctl(struct drm_device *dev,
4086 void *data, struct drm_file *file_priv)
4087 {
4088 struct drm_mode_get_property *out_resp = data;
4089 struct drm_property *property;
4090 int enum_count = 0;
4091 int value_count = 0;
4092 int ret = 0, i;
4093 int copied;
4094 struct drm_property_enum *prop_enum;
4095 struct drm_mode_property_enum __user *enum_ptr;
4096 uint64_t __user *values_ptr;
4097
4098 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4099 return -EINVAL;
4100
4101 drm_modeset_lock_all(dev);
4102 property = drm_property_find(dev, out_resp->prop_id);
4103 if (!property) {
4104 ret = -ENOENT;
4105 goto done;
4106 }
4107
4108 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
4109 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
4110 list_for_each_entry(prop_enum, &property->enum_list, head)
4111 enum_count++;
4112 }
4113
4114 value_count = property->num_values;
4115
4116 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
4117 out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
4118 out_resp->flags = property->flags;
4119
4120 if ((out_resp->count_values >= value_count) && value_count) {
4121 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
4122 for (i = 0; i < value_count; i++) {
4123 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
4124 ret = -EFAULT;
4125 goto done;
4126 }
4127 }
4128 }
4129 out_resp->count_values = value_count;
4130
4131 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) ||
4132 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
4133 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
4134 copied = 0;
4135 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
4136 list_for_each_entry(prop_enum, &property->enum_list, head) {
4137
4138 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
4139 ret = -EFAULT;
4140 goto done;
4141 }
4142
4143 if (copy_to_user(&enum_ptr[copied].name,
4144 &prop_enum->name, DRM_PROP_NAME_LEN)) {
4145 ret = -EFAULT;
4146 goto done;
4147 }
4148 copied++;
4149 }
4150 }
4151 out_resp->count_enum_blobs = enum_count;
4152 }
4153
4154 /*
4155 * NOTE: The idea seems to have been to use this to read all the blob
4156 * property values. But nothing ever added them to the corresponding
4157 * list, userspace always used the special-purpose get_blob ioctl to
4158 * read the value for a blob property. It also doesn't make a lot of
4159 * sense to return values here when everything else is just metadata for
4160 * the property itself.
4161 */
4162 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
4163 out_resp->count_enum_blobs = 0;
4164 done:
4165 drm_modeset_unlock_all(dev);
4166 return ret;
4167 }
4168
4169 /**
4170 * drm_property_create_blob - Create new blob property
4171 *
4172 * Creates a new blob property for a specified DRM device, optionally
4173 * copying data.
4174 *
4175 * @dev: DRM device to create property for
4176 * @length: Length to allocate for blob data
4177 * @data: If specified, copies data into blob
4178 *
4179 * Returns:
4180 * New blob property with a single reference on success, or an ERR_PTR
4181 * value on failure.
4182 */
4183 struct drm_property_blob *
drm_property_create_blob(struct drm_device * dev,size_t length,const void * data)4184 drm_property_create_blob(struct drm_device *dev, size_t length,
4185 const void *data)
4186 {
4187 struct drm_property_blob *blob;
4188 int ret;
4189
4190 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob))
4191 return ERR_PTR(-EINVAL);
4192
4193 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
4194 if (!blob)
4195 return ERR_PTR(-ENOMEM);
4196
4197 /* This must be explicitly initialised, so we can safely call list_del
4198 * on it in the removal handler, even if it isn't in a file list. */
4199 INIT_LIST_HEAD(&blob->head_file);
4200 blob->length = length;
4201 blob->dev = dev;
4202
4203 if (data)
4204 memcpy(blob->data, data, length);
4205
4206 mutex_lock(&dev->mode_config.blob_lock);
4207
4208 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
4209 if (ret) {
4210 kfree(blob);
4211 mutex_unlock(&dev->mode_config.blob_lock);
4212 return ERR_PTR(-EINVAL);
4213 }
4214
4215 kref_init(&blob->refcount);
4216
4217 list_add_tail(&blob->head_global,
4218 &dev->mode_config.property_blob_list);
4219
4220 mutex_unlock(&dev->mode_config.blob_lock);
4221
4222 return blob;
4223 }
4224 EXPORT_SYMBOL(drm_property_create_blob);
4225
4226 /**
4227 * drm_property_free_blob - Blob property destructor
4228 *
4229 * Internal free function for blob properties; must not be used directly.
4230 *
4231 * @kref: Reference
4232 */
drm_property_free_blob(struct kref * kref)4233 static void drm_property_free_blob(struct kref *kref)
4234 {
4235 struct drm_property_blob *blob =
4236 container_of(kref, struct drm_property_blob, refcount);
4237
4238 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock));
4239
4240 list_del(&blob->head_global);
4241 list_del(&blob->head_file);
4242 drm_mode_object_put(blob->dev, &blob->base);
4243
4244 kfree(blob);
4245 }
4246
4247 /**
4248 * drm_property_unreference_blob - Unreference a blob property
4249 *
4250 * Drop a reference on a blob property. May free the object.
4251 *
4252 * @blob: Pointer to blob property
4253 */
drm_property_unreference_blob(struct drm_property_blob * blob)4254 void drm_property_unreference_blob(struct drm_property_blob *blob)
4255 {
4256 struct drm_device *dev;
4257
4258 if (!blob)
4259 return;
4260
4261 dev = blob->dev;
4262
4263 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4264
4265 if (kref_put_mutex(&blob->refcount, drm_property_free_blob,
4266 &dev->mode_config.blob_lock))
4267 mutex_unlock(&dev->mode_config.blob_lock);
4268 else
4269 might_lock(&dev->mode_config.blob_lock);
4270 }
4271 EXPORT_SYMBOL(drm_property_unreference_blob);
4272
4273 /**
4274 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held
4275 *
4276 * Drop a reference on a blob property. May free the object. This must be
4277 * called with blob_lock held.
4278 *
4279 * @blob: Pointer to blob property
4280 */
drm_property_unreference_blob_locked(struct drm_property_blob * blob)4281 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob)
4282 {
4283 if (!blob)
4284 return;
4285
4286 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4287
4288 kref_put(&blob->refcount, drm_property_free_blob);
4289 }
4290
4291 /**
4292 * drm_property_destroy_user_blobs - destroy all blobs created by this client
4293 * @dev: DRM device
4294 * @file_priv: destroy all blobs owned by this file handle
4295 */
drm_property_destroy_user_blobs(struct drm_device * dev,struct drm_file * file_priv)4296 void drm_property_destroy_user_blobs(struct drm_device *dev,
4297 struct drm_file *file_priv)
4298 {
4299 struct drm_property_blob *blob, *bt;
4300
4301 mutex_lock(&dev->mode_config.blob_lock);
4302
4303 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) {
4304 list_del_init(&blob->head_file);
4305 drm_property_unreference_blob_locked(blob);
4306 }
4307
4308 mutex_unlock(&dev->mode_config.blob_lock);
4309 }
4310
4311 /**
4312 * drm_property_reference_blob - Take a reference on an existing property
4313 *
4314 * Take a new reference on an existing blob property.
4315 *
4316 * @blob: Pointer to blob property
4317 */
drm_property_reference_blob(struct drm_property_blob * blob)4318 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob)
4319 {
4320 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
4321 kref_get(&blob->refcount);
4322 return blob;
4323 }
4324 EXPORT_SYMBOL(drm_property_reference_blob);
4325
4326 /*
4327 * Like drm_property_lookup_blob, but does not return an additional reference.
4328 * Must be called with blob_lock held.
4329 */
__drm_property_lookup_blob(struct drm_device * dev,uint32_t id)4330 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev,
4331 uint32_t id)
4332 {
4333 struct drm_mode_object *obj = NULL;
4334 struct drm_property_blob *blob;
4335
4336 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock));
4337
4338 mutex_lock(&dev->mode_config.idr_mutex);
4339 obj = idr_find(&dev->mode_config.crtc_idr, id);
4340 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id))
4341 blob = NULL;
4342 else
4343 blob = obj_to_blob(obj);
4344 mutex_unlock(&dev->mode_config.idr_mutex);
4345
4346 return blob;
4347 }
4348
4349 /**
4350 * drm_property_lookup_blob - look up a blob property and take a reference
4351 * @dev: drm device
4352 * @id: id of the blob property
4353 *
4354 * If successful, this takes an additional reference to the blob property.
4355 * callers need to make sure to eventually unreference the returned property
4356 * again, using @drm_property_unreference_blob.
4357 */
drm_property_lookup_blob(struct drm_device * dev,uint32_t id)4358 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev,
4359 uint32_t id)
4360 {
4361 struct drm_property_blob *blob;
4362
4363 mutex_lock(&dev->mode_config.blob_lock);
4364 blob = __drm_property_lookup_blob(dev, id);
4365 if (blob) {
4366 if (!kref_get_unless_zero(&blob->refcount))
4367 blob = NULL;
4368 }
4369 mutex_unlock(&dev->mode_config.blob_lock);
4370
4371 return blob;
4372 }
4373 EXPORT_SYMBOL(drm_property_lookup_blob);
4374
4375 /**
4376 * drm_property_replace_global_blob - atomically replace existing blob property
4377 * @dev: drm device
4378 * @replace: location of blob property pointer to be replaced
4379 * @length: length of data for new blob, or 0 for no data
4380 * @data: content for new blob, or NULL for no data
4381 * @obj_holds_id: optional object for property holding blob ID
4382 * @prop_holds_id: optional property holding blob ID
4383 * @return 0 on success or error on failure
4384 *
4385 * This function will atomically replace a global property in the blob list,
4386 * optionally updating a property which holds the ID of that property. It is
4387 * guaranteed to be atomic: no caller will be allowed to see intermediate
4388 * results, and either the entire operation will succeed and clean up the
4389 * previous property, or it will fail and the state will be unchanged.
4390 *
4391 * If length is 0 or data is NULL, no new blob will be created, and the holding
4392 * property, if specified, will be set to 0.
4393 *
4394 * Access to the replace pointer is assumed to be protected by the caller, e.g.
4395 * by holding the relevant modesetting object lock for its parent.
4396 *
4397 * For example, a drm_connector has a 'PATH' property, which contains the ID
4398 * of a blob property with the value of the MST path information. Calling this
4399 * function with replace pointing to the connector's path_blob_ptr, length and
4400 * data set for the new path information, obj_holds_id set to the connector's
4401 * base object, and prop_holds_id set to the path property name, will perform
4402 * a completely atomic update. The access to path_blob_ptr is protected by the
4403 * caller holding a lock on the connector.
4404 */
drm_property_replace_global_blob(struct drm_device * dev,struct drm_property_blob ** replace,size_t length,const void * data,struct drm_mode_object * obj_holds_id,struct drm_property * prop_holds_id)4405 static int drm_property_replace_global_blob(struct drm_device *dev,
4406 struct drm_property_blob **replace,
4407 size_t length,
4408 const void *data,
4409 struct drm_mode_object *obj_holds_id,
4410 struct drm_property *prop_holds_id)
4411 {
4412 struct drm_property_blob *new_blob = NULL;
4413 struct drm_property_blob *old_blob = NULL;
4414 int ret;
4415
4416 WARN_ON(replace == NULL);
4417
4418 old_blob = *replace;
4419
4420 if (length && data) {
4421 new_blob = drm_property_create_blob(dev, length, data);
4422 if (IS_ERR(new_blob))
4423 return PTR_ERR(new_blob);
4424 }
4425
4426 /* This does not need to be synchronised with blob_lock, as the
4427 * get_properties ioctl locks all modesetting objects, and
4428 * obj_holds_id must be locked before calling here, so we cannot
4429 * have its value out of sync with the list membership modified
4430 * below under blob_lock. */
4431 if (obj_holds_id) {
4432 ret = drm_object_property_set_value(obj_holds_id,
4433 prop_holds_id,
4434 new_blob ?
4435 new_blob->base.id : 0);
4436 if (ret != 0)
4437 goto err_created;
4438 }
4439
4440 drm_property_unreference_blob(old_blob);
4441 *replace = new_blob;
4442
4443 return 0;
4444
4445 err_created:
4446 drm_property_unreference_blob(new_blob);
4447 return ret;
4448 }
4449
4450 /**
4451 * drm_mode_getblob_ioctl - get the contents of a blob property value
4452 * @dev: DRM device
4453 * @data: ioctl data
4454 * @file_priv: DRM file info
4455 *
4456 * This function retrieves the contents of a blob property. The value stored in
4457 * an object's blob property is just a normal modeset object id.
4458 *
4459 * Called by the user via ioctl.
4460 *
4461 * Returns:
4462 * Zero on success, negative errno on failure.
4463 */
drm_mode_getblob_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)4464 int drm_mode_getblob_ioctl(struct drm_device *dev,
4465 void *data, struct drm_file *file_priv)
4466 {
4467 struct drm_mode_get_blob *out_resp = data;
4468 struct drm_property_blob *blob;
4469 int ret = 0;
4470 void __user *blob_ptr;
4471
4472 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4473 return -EINVAL;
4474
4475 drm_modeset_lock_all(dev);
4476 mutex_lock(&dev->mode_config.blob_lock);
4477 blob = __drm_property_lookup_blob(dev, out_resp->blob_id);
4478 if (!blob) {
4479 ret = -ENOENT;
4480 goto done;
4481 }
4482
4483 if (out_resp->length == blob->length) {
4484 blob_ptr = (void __user *)(unsigned long)out_resp->data;
4485 if (copy_to_user(blob_ptr, blob->data, blob->length)) {
4486 ret = -EFAULT;
4487 goto done;
4488 }
4489 }
4490 out_resp->length = blob->length;
4491
4492 done:
4493 mutex_unlock(&dev->mode_config.blob_lock);
4494 drm_modeset_unlock_all(dev);
4495 return ret;
4496 }
4497
4498 /**
4499 * drm_mode_createblob_ioctl - create a new blob property
4500 * @dev: DRM device
4501 * @data: ioctl data
4502 * @file_priv: DRM file info
4503 *
4504 * This function creates a new blob property with user-defined values. In order
4505 * to give us sensible validation and checking when creating, rather than at
4506 * every potential use, we also require a type to be provided upfront.
4507 *
4508 * Called by the user via ioctl.
4509 *
4510 * Returns:
4511 * Zero on success, negative errno on failure.
4512 */
drm_mode_createblob_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)4513 int drm_mode_createblob_ioctl(struct drm_device *dev,
4514 void *data, struct drm_file *file_priv)
4515 {
4516 struct drm_mode_create_blob *out_resp = data;
4517 struct drm_property_blob *blob;
4518 void __user *blob_ptr;
4519 int ret = 0;
4520
4521 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4522 return -EINVAL;
4523
4524 blob = drm_property_create_blob(dev, out_resp->length, NULL);
4525 if (IS_ERR(blob))
4526 return PTR_ERR(blob);
4527
4528 blob_ptr = (void __user *)(unsigned long)out_resp->data;
4529 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) {
4530 ret = -EFAULT;
4531 goto out_blob;
4532 }
4533
4534 /* Dropping the lock between create_blob and our access here is safe
4535 * as only the same file_priv can remove the blob; at this point, it is
4536 * not associated with any file_priv. */
4537 mutex_lock(&dev->mode_config.blob_lock);
4538 out_resp->blob_id = blob->base.id;
4539 list_add_tail(&blob->head_file, &file_priv->blobs);
4540 mutex_unlock(&dev->mode_config.blob_lock);
4541
4542 return 0;
4543
4544 out_blob:
4545 drm_property_unreference_blob(blob);
4546 return ret;
4547 }
4548
4549 /**
4550 * drm_mode_destroyblob_ioctl - destroy a user blob property
4551 * @dev: DRM device
4552 * @data: ioctl data
4553 * @file_priv: DRM file info
4554 *
4555 * Destroy an existing user-defined blob property.
4556 *
4557 * Called by the user via ioctl.
4558 *
4559 * Returns:
4560 * Zero on success, negative errno on failure.
4561 */
drm_mode_destroyblob_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)4562 int drm_mode_destroyblob_ioctl(struct drm_device *dev,
4563 void *data, struct drm_file *file_priv)
4564 {
4565 struct drm_mode_destroy_blob *out_resp = data;
4566 struct drm_property_blob *blob = NULL, *bt;
4567 bool found = false;
4568 int ret = 0;
4569
4570 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4571 return -EINVAL;
4572
4573 mutex_lock(&dev->mode_config.blob_lock);
4574 blob = __drm_property_lookup_blob(dev, out_resp->blob_id);
4575 if (!blob) {
4576 ret = -ENOENT;
4577 goto err;
4578 }
4579
4580 /* Ensure the property was actually created by this user. */
4581 list_for_each_entry(bt, &file_priv->blobs, head_file) {
4582 if (bt == blob) {
4583 found = true;
4584 break;
4585 }
4586 }
4587
4588 if (!found) {
4589 ret = -EPERM;
4590 goto err;
4591 }
4592
4593 /* We must drop head_file here, because we may not be the last
4594 * reference on the blob. */
4595 list_del_init(&blob->head_file);
4596 drm_property_unreference_blob_locked(blob);
4597 mutex_unlock(&dev->mode_config.blob_lock);
4598
4599 return 0;
4600
4601 err:
4602 mutex_unlock(&dev->mode_config.blob_lock);
4603 return ret;
4604 }
4605
4606 /**
4607 * drm_mode_connector_set_path_property - set tile property on connector
4608 * @connector: connector to set property on.
4609 * @path: path to use for property; must not be NULL.
4610 *
4611 * This creates a property to expose to userspace to specify a
4612 * connector path. This is mainly used for DisplayPort MST where
4613 * connectors have a topology and we want to allow userspace to give
4614 * them more meaningful names.
4615 *
4616 * Returns:
4617 * Zero on success, negative errno on failure.
4618 */
drm_mode_connector_set_path_property(struct drm_connector * connector,const char * path)4619 int drm_mode_connector_set_path_property(struct drm_connector *connector,
4620 const char *path)
4621 {
4622 struct drm_device *dev = connector->dev;
4623 int ret;
4624
4625 ret = drm_property_replace_global_blob(dev,
4626 &connector->path_blob_ptr,
4627 strlen(path) + 1,
4628 path,
4629 &connector->base,
4630 dev->mode_config.path_property);
4631 return ret;
4632 }
4633 EXPORT_SYMBOL(drm_mode_connector_set_path_property);
4634
4635 /**
4636 * drm_mode_connector_set_tile_property - set tile property on connector
4637 * @connector: connector to set property on.
4638 *
4639 * This looks up the tile information for a connector, and creates a
4640 * property for userspace to parse if it exists. The property is of
4641 * the form of 8 integers using ':' as a separator.
4642 *
4643 * Returns:
4644 * Zero on success, errno on failure.
4645 */
drm_mode_connector_set_tile_property(struct drm_connector * connector)4646 int drm_mode_connector_set_tile_property(struct drm_connector *connector)
4647 {
4648 struct drm_device *dev = connector->dev;
4649 char tile[256];
4650 int ret;
4651
4652 if (!connector->has_tile) {
4653 ret = drm_property_replace_global_blob(dev,
4654 &connector->tile_blob_ptr,
4655 0,
4656 NULL,
4657 &connector->base,
4658 dev->mode_config.tile_property);
4659 return ret;
4660 }
4661
4662 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
4663 connector->tile_group->id, connector->tile_is_single_monitor,
4664 connector->num_h_tile, connector->num_v_tile,
4665 connector->tile_h_loc, connector->tile_v_loc,
4666 connector->tile_h_size, connector->tile_v_size);
4667
4668 ret = drm_property_replace_global_blob(dev,
4669 &connector->tile_blob_ptr,
4670 strlen(tile) + 1,
4671 tile,
4672 &connector->base,
4673 dev->mode_config.tile_property);
4674 return ret;
4675 }
4676 EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
4677
4678 /**
4679 * drm_mode_connector_update_edid_property - update the edid property of a connector
4680 * @connector: drm connector
4681 * @edid: new value of the edid property
4682 *
4683 * This function creates a new blob modeset object and assigns its id to the
4684 * connector's edid property.
4685 *
4686 * Returns:
4687 * Zero on success, negative errno on failure.
4688 */
drm_mode_connector_update_edid_property(struct drm_connector * connector,const struct edid * edid)4689 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
4690 const struct edid *edid)
4691 {
4692 struct drm_device *dev = connector->dev;
4693 size_t size = 0;
4694 int ret;
4695
4696 /* ignore requests to set edid when overridden */
4697 if (connector->override_edid)
4698 return 0;
4699
4700 if (edid)
4701 size = EDID_LENGTH * (1 + edid->extensions);
4702
4703 ret = drm_property_replace_global_blob(dev,
4704 &connector->edid_blob_ptr,
4705 size,
4706 edid,
4707 &connector->base,
4708 dev->mode_config.edid_property);
4709 return ret;
4710 }
4711 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
4712
4713 /* Some properties could refer to dynamic refcnt'd objects, or things that
4714 * need special locking to handle lifetime issues (ie. to ensure the prop
4715 * value doesn't become invalid part way through the property update due to
4716 * race). The value returned by reference via 'obj' should be passed back
4717 * to drm_property_change_valid_put() after the property is set (and the
4718 * object to which the property is attached has a chance to take it's own
4719 * reference).
4720 */
drm_property_change_valid_get(struct drm_property * property,uint64_t value,struct drm_mode_object ** ref)4721 bool drm_property_change_valid_get(struct drm_property *property,
4722 uint64_t value, struct drm_mode_object **ref)
4723 {
4724 int i;
4725
4726 if (property->flags & DRM_MODE_PROP_IMMUTABLE)
4727 return false;
4728
4729 *ref = NULL;
4730
4731 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) {
4732 if (value < property->values[0] || value > property->values[1])
4733 return false;
4734 return true;
4735 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) {
4736 int64_t svalue = U642I64(value);
4737
4738 if (svalue < U642I64(property->values[0]) ||
4739 svalue > U642I64(property->values[1]))
4740 return false;
4741 return true;
4742 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
4743 uint64_t valid_mask = 0;
4744
4745 for (i = 0; i < property->num_values; i++)
4746 valid_mask |= (1ULL << property->values[i]);
4747 return !(value & ~valid_mask);
4748 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
4749 struct drm_property_blob *blob;
4750
4751 if (value == 0)
4752 return true;
4753
4754 blob = drm_property_lookup_blob(property->dev, value);
4755 if (blob) {
4756 *ref = &blob->base;
4757 return true;
4758 } else {
4759 return false;
4760 }
4761 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
4762 /* a zero value for an object property translates to null: */
4763 if (value == 0)
4764 return true;
4765
4766 /* handle refcnt'd objects specially: */
4767 if (property->values[0] == DRM_MODE_OBJECT_FB) {
4768 struct drm_framebuffer *fb;
4769 fb = drm_framebuffer_lookup(property->dev, value);
4770 if (fb) {
4771 *ref = &fb->base;
4772 return true;
4773 } else {
4774 return false;
4775 }
4776 } else {
4777 return _object_find(property->dev, value, property->values[0]) != NULL;
4778 }
4779 }
4780
4781 for (i = 0; i < property->num_values; i++)
4782 if (property->values[i] == value)
4783 return true;
4784 return false;
4785 }
4786
drm_property_change_valid_put(struct drm_property * property,struct drm_mode_object * ref)4787 void drm_property_change_valid_put(struct drm_property *property,
4788 struct drm_mode_object *ref)
4789 {
4790 if (!ref)
4791 return;
4792
4793 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
4794 if (property->values[0] == DRM_MODE_OBJECT_FB)
4795 drm_framebuffer_unreference(obj_to_fb(ref));
4796 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
4797 drm_property_unreference_blob(obj_to_blob(ref));
4798 }
4799
4800 /**
4801 * drm_mode_connector_property_set_ioctl - set the current value of a connector property
4802 * @dev: DRM device
4803 * @data: ioctl data
4804 * @file_priv: DRM file info
4805 *
4806 * This function sets the current value for a connectors's property. It also
4807 * calls into a driver's ->set_property callback to update the hardware state
4808 *
4809 * Called by the user via ioctl.
4810 *
4811 * Returns:
4812 * Zero on success, negative errno on failure.
4813 */
drm_mode_connector_property_set_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)4814 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
4815 void *data, struct drm_file *file_priv)
4816 {
4817 struct drm_mode_connector_set_property *conn_set_prop = data;
4818 struct drm_mode_obj_set_property obj_set_prop = {
4819 .value = conn_set_prop->value,
4820 .prop_id = conn_set_prop->prop_id,
4821 .obj_id = conn_set_prop->connector_id,
4822 .obj_type = DRM_MODE_OBJECT_CONNECTOR
4823 };
4824
4825 /* It does all the locking and checking we need */
4826 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
4827 }
4828
drm_mode_connector_set_obj_prop(struct drm_mode_object * obj,struct drm_property * property,uint64_t value)4829 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
4830 struct drm_property *property,
4831 uint64_t value)
4832 {
4833 int ret = -EINVAL;
4834 struct drm_connector *connector = obj_to_connector(obj);
4835
4836 /* Do DPMS ourselves */
4837 if (property == connector->dev->mode_config.dpms_property) {
4838 ret = 0;
4839 if (connector->funcs->dpms)
4840 ret = (*connector->funcs->dpms)(connector, (int)value);
4841 } else if (connector->funcs->set_property)
4842 ret = connector->funcs->set_property(connector, property, value);
4843
4844 /* store the property value if successful */
4845 if (!ret)
4846 drm_object_property_set_value(&connector->base, property, value);
4847 return ret;
4848 }
4849
drm_mode_crtc_set_obj_prop(struct drm_mode_object * obj,struct drm_property * property,uint64_t value)4850 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
4851 struct drm_property *property,
4852 uint64_t value)
4853 {
4854 int ret = -EINVAL;
4855 struct drm_crtc *crtc = obj_to_crtc(obj);
4856
4857 if (crtc->funcs->set_property)
4858 ret = crtc->funcs->set_property(crtc, property, value);
4859 if (!ret)
4860 drm_object_property_set_value(obj, property, value);
4861
4862 return ret;
4863 }
4864
4865 /**
4866 * drm_mode_plane_set_obj_prop - set the value of a property
4867 * @plane: drm plane object to set property value for
4868 * @property: property to set
4869 * @value: value the property should be set to
4870 *
4871 * This functions sets a given property on a given plane object. This function
4872 * calls the driver's ->set_property callback and changes the software state of
4873 * the property if the callback succeeds.
4874 *
4875 * Returns:
4876 * Zero on success, error code on failure.
4877 */
drm_mode_plane_set_obj_prop(struct drm_plane * plane,struct drm_property * property,uint64_t value)4878 int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
4879 struct drm_property *property,
4880 uint64_t value)
4881 {
4882 int ret = -EINVAL;
4883 struct drm_mode_object *obj = &plane->base;
4884
4885 if (plane->funcs->set_property)
4886 ret = plane->funcs->set_property(plane, property, value);
4887 if (!ret)
4888 drm_object_property_set_value(obj, property, value);
4889
4890 return ret;
4891 }
4892 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
4893
4894 /**
4895 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property
4896 * @dev: DRM device
4897 * @data: ioctl data
4898 * @file_priv: DRM file info
4899 *
4900 * This function retrieves the current value for an object's property. Compared
4901 * to the connector specific ioctl this one is extended to also work on crtc and
4902 * plane objects.
4903 *
4904 * Called by the user via ioctl.
4905 *
4906 * Returns:
4907 * Zero on success, negative errno on failure.
4908 */
drm_mode_obj_get_properties_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)4909 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
4910 struct drm_file *file_priv)
4911 {
4912 struct drm_mode_obj_get_properties *arg = data;
4913 struct drm_mode_object *obj;
4914 int ret = 0;
4915
4916 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4917 return -EINVAL;
4918
4919 drm_modeset_lock_all(dev);
4920
4921 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
4922 if (!obj) {
4923 ret = -ENOENT;
4924 goto out;
4925 }
4926 if (!obj->properties) {
4927 ret = -EINVAL;
4928 goto out;
4929 }
4930
4931 ret = get_properties(obj, file_priv->atomic,
4932 (uint32_t __user *)(unsigned long)(arg->props_ptr),
4933 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
4934 &arg->count_props);
4935
4936 out:
4937 drm_modeset_unlock_all(dev);
4938 return ret;
4939 }
4940
4941 /**
4942 * drm_mode_obj_set_property_ioctl - set the current value of an object's property
4943 * @dev: DRM device
4944 * @data: ioctl data
4945 * @file_priv: DRM file info
4946 *
4947 * This function sets the current value for an object's property. It also calls
4948 * into a driver's ->set_property callback to update the hardware state.
4949 * Compared to the connector specific ioctl this one is extended to also work on
4950 * crtc and plane objects.
4951 *
4952 * Called by the user via ioctl.
4953 *
4954 * Returns:
4955 * Zero on success, negative errno on failure.
4956 */
drm_mode_obj_set_property_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)4957 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
4958 struct drm_file *file_priv)
4959 {
4960 struct drm_mode_obj_set_property *arg = data;
4961 struct drm_mode_object *arg_obj;
4962 struct drm_mode_object *prop_obj;
4963 struct drm_property *property;
4964 int i, ret = -EINVAL;
4965 struct drm_mode_object *ref;
4966
4967 if (!drm_core_check_feature(dev, DRIVER_MODESET))
4968 return -EINVAL;
4969
4970 drm_modeset_lock_all(dev);
4971
4972 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
4973 if (!arg_obj) {
4974 ret = -ENOENT;
4975 goto out;
4976 }
4977 if (!arg_obj->properties)
4978 goto out;
4979
4980 for (i = 0; i < arg_obj->properties->count; i++)
4981 if (arg_obj->properties->properties[i]->base.id == arg->prop_id)
4982 break;
4983
4984 if (i == arg_obj->properties->count)
4985 goto out;
4986
4987 prop_obj = drm_mode_object_find(dev, arg->prop_id,
4988 DRM_MODE_OBJECT_PROPERTY);
4989 if (!prop_obj) {
4990 ret = -ENOENT;
4991 goto out;
4992 }
4993 property = obj_to_property(prop_obj);
4994
4995 if (!drm_property_change_valid_get(property, arg->value, &ref))
4996 goto out;
4997
4998 switch (arg_obj->type) {
4999 case DRM_MODE_OBJECT_CONNECTOR:
5000 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
5001 arg->value);
5002 break;
5003 case DRM_MODE_OBJECT_CRTC:
5004 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
5005 break;
5006 case DRM_MODE_OBJECT_PLANE:
5007 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj),
5008 property, arg->value);
5009 break;
5010 }
5011
5012 drm_property_change_valid_put(property, ref);
5013
5014 out:
5015 drm_modeset_unlock_all(dev);
5016 return ret;
5017 }
5018
5019 /**
5020 * drm_mode_connector_attach_encoder - attach a connector to an encoder
5021 * @connector: connector to attach
5022 * @encoder: encoder to attach @connector to
5023 *
5024 * This function links up a connector to an encoder. Note that the routing
5025 * restrictions between encoders and crtcs are exposed to userspace through the
5026 * possible_clones and possible_crtcs bitmasks.
5027 *
5028 * Returns:
5029 * Zero on success, negative errno on failure.
5030 */
drm_mode_connector_attach_encoder(struct drm_connector * connector,struct drm_encoder * encoder)5031 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
5032 struct drm_encoder *encoder)
5033 {
5034 int i;
5035
5036 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
5037 if (connector->encoder_ids[i] == 0) {
5038 connector->encoder_ids[i] = encoder->base.id;
5039 return 0;
5040 }
5041 }
5042 return -ENOMEM;
5043 }
5044 EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
5045
5046 /**
5047 * drm_mode_crtc_set_gamma_size - set the gamma table size
5048 * @crtc: CRTC to set the gamma table size for
5049 * @gamma_size: size of the gamma table
5050 *
5051 * Drivers which support gamma tables should set this to the supported gamma
5052 * table size when initializing the CRTC. Currently the drm core only supports a
5053 * fixed gamma table size.
5054 *
5055 * Returns:
5056 * Zero on success, negative errno on failure.
5057 */
drm_mode_crtc_set_gamma_size(struct drm_crtc * crtc,int gamma_size)5058 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
5059 int gamma_size)
5060 {
5061 crtc->gamma_size = gamma_size;
5062
5063 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3,
5064 GFP_KERNEL);
5065 if (!crtc->gamma_store) {
5066 crtc->gamma_size = 0;
5067 return -ENOMEM;
5068 }
5069
5070 return 0;
5071 }
5072 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
5073
5074 /**
5075 * drm_mode_gamma_set_ioctl - set the gamma table
5076 * @dev: DRM device
5077 * @data: ioctl data
5078 * @file_priv: DRM file info
5079 *
5080 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can
5081 * inquire the required gamma table size through drm_mode_gamma_get_ioctl.
5082 *
5083 * Called by the user via ioctl.
5084 *
5085 * Returns:
5086 * Zero on success, negative errno on failure.
5087 */
drm_mode_gamma_set_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)5088 int drm_mode_gamma_set_ioctl(struct drm_device *dev,
5089 void *data, struct drm_file *file_priv)
5090 {
5091 struct drm_mode_crtc_lut *crtc_lut = data;
5092 struct drm_crtc *crtc;
5093 void *r_base, *g_base, *b_base;
5094 int size;
5095 int ret = 0;
5096
5097 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5098 return -EINVAL;
5099
5100 drm_modeset_lock_all(dev);
5101 crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
5102 if (!crtc) {
5103 ret = -ENOENT;
5104 goto out;
5105 }
5106
5107 if (crtc->funcs->gamma_set == NULL) {
5108 ret = -ENOSYS;
5109 goto out;
5110 }
5111
5112 /* memcpy into gamma store */
5113 if (crtc_lut->gamma_size != crtc->gamma_size) {
5114 ret = -EINVAL;
5115 goto out;
5116 }
5117
5118 size = crtc_lut->gamma_size * (sizeof(uint16_t));
5119 r_base = crtc->gamma_store;
5120 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
5121 ret = -EFAULT;
5122 goto out;
5123 }
5124
5125 g_base = r_base + size;
5126 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
5127 ret = -EFAULT;
5128 goto out;
5129 }
5130
5131 b_base = g_base + size;
5132 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
5133 ret = -EFAULT;
5134 goto out;
5135 }
5136
5137 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
5138
5139 out:
5140 drm_modeset_unlock_all(dev);
5141 return ret;
5142
5143 }
5144
5145 /**
5146 * drm_mode_gamma_get_ioctl - get the gamma table
5147 * @dev: DRM device
5148 * @data: ioctl data
5149 * @file_priv: DRM file info
5150 *
5151 * Copy the current gamma table into the storage provided. This also provides
5152 * the gamma table size the driver expects, which can be used to size the
5153 * allocated storage.
5154 *
5155 * Called by the user via ioctl.
5156 *
5157 * Returns:
5158 * Zero on success, negative errno on failure.
5159 */
drm_mode_gamma_get_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)5160 int drm_mode_gamma_get_ioctl(struct drm_device *dev,
5161 void *data, struct drm_file *file_priv)
5162 {
5163 struct drm_mode_crtc_lut *crtc_lut = data;
5164 struct drm_crtc *crtc;
5165 void *r_base, *g_base, *b_base;
5166 int size;
5167 int ret = 0;
5168
5169 if (!drm_core_check_feature(dev, DRIVER_MODESET))
5170 return -EINVAL;
5171
5172 drm_modeset_lock_all(dev);
5173 crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
5174 if (!crtc) {
5175 ret = -ENOENT;
5176 goto out;
5177 }
5178
5179 /* memcpy into gamma store */
5180 if (crtc_lut->gamma_size != crtc->gamma_size) {
5181 ret = -EINVAL;
5182 goto out;
5183 }
5184
5185 size = crtc_lut->gamma_size * (sizeof(uint16_t));
5186 r_base = crtc->gamma_store;
5187 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
5188 ret = -EFAULT;
5189 goto out;
5190 }
5191
5192 g_base = r_base + size;
5193 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
5194 ret = -EFAULT;
5195 goto out;
5196 }
5197
5198 b_base = g_base + size;
5199 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
5200 ret = -EFAULT;
5201 goto out;
5202 }
5203 out:
5204 drm_modeset_unlock_all(dev);
5205 return ret;
5206 }
5207
5208 /**
5209 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update
5210 * @dev: DRM device
5211 * @data: ioctl data
5212 * @file_priv: DRM file info
5213 *
5214 * This schedules an asynchronous update on a given CRTC, called page flip.
5215 * Optionally a drm event is generated to signal the completion of the event.
5216 * Generic drivers cannot assume that a pageflip with changed framebuffer
5217 * properties (including driver specific metadata like tiling layout) will work,
5218 * but some drivers support e.g. pixel format changes through the pageflip
5219 * ioctl.
5220 *
5221 * Called by the user via ioctl.
5222 *
5223 * Returns:
5224 * Zero on success, negative errno on failure.
5225 */
drm_mode_page_flip_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)5226 int drm_mode_page_flip_ioctl(struct drm_device *dev,
5227 void *data, struct drm_file *file_priv)
5228 {
5229 struct drm_mode_crtc_page_flip *page_flip = data;
5230 struct drm_crtc *crtc;
5231 struct drm_framebuffer *fb = NULL;
5232 struct drm_pending_vblank_event *e = NULL;
5233 unsigned long flags;
5234 int ret = -EINVAL;
5235
5236 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
5237 page_flip->reserved != 0)
5238 return -EINVAL;
5239
5240 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
5241 return -EINVAL;
5242
5243 crtc = drm_crtc_find(dev, page_flip->crtc_id);
5244 if (!crtc)
5245 return -ENOENT;
5246
5247 drm_modeset_lock_crtc(crtc, crtc->primary);
5248 if (crtc->primary->fb == NULL) {
5249 /* The framebuffer is currently unbound, presumably
5250 * due to a hotplug event, that userspace has not
5251 * yet discovered.
5252 */
5253 ret = -EBUSY;
5254 goto out;
5255 }
5256
5257 if (crtc->funcs->page_flip == NULL)
5258 goto out;
5259
5260 fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
5261 if (!fb) {
5262 ret = -ENOENT;
5263 goto out;
5264 }
5265
5266 if (crtc->state) {
5267 const struct drm_plane_state *state = crtc->primary->state;
5268
5269 ret = check_src_coords(state->src_x, state->src_y,
5270 state->src_w, state->src_h, fb);
5271 } else {
5272 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb);
5273 }
5274 if (ret)
5275 goto out;
5276
5277 if (crtc->primary->fb->pixel_format != fb->pixel_format) {
5278 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
5279 ret = -EINVAL;
5280 goto out;
5281 }
5282
5283 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
5284 ret = -ENOMEM;
5285 spin_lock_irqsave(&dev->event_lock, flags);
5286 if (file_priv->event_space < sizeof(e->event)) {
5287 spin_unlock_irqrestore(&dev->event_lock, flags);
5288 goto out;
5289 }
5290 file_priv->event_space -= sizeof(e->event);
5291 spin_unlock_irqrestore(&dev->event_lock, flags);
5292
5293 e = kzalloc(sizeof(*e), GFP_KERNEL);
5294 if (e == NULL) {
5295 spin_lock_irqsave(&dev->event_lock, flags);
5296 file_priv->event_space += sizeof(e->event);
5297 spin_unlock_irqrestore(&dev->event_lock, flags);
5298 goto out;
5299 }
5300
5301 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
5302 e->event.base.length = sizeof(e->event);
5303 e->event.user_data = page_flip->user_data;
5304 e->base.event = &e->event.base;
5305 e->base.file_priv = file_priv;
5306 e->base.destroy =
5307 (void (*) (struct drm_pending_event *)) kfree;
5308 }
5309
5310 crtc->primary->old_fb = crtc->primary->fb;
5311 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags);
5312 if (ret) {
5313 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
5314 spin_lock_irqsave(&dev->event_lock, flags);
5315 file_priv->event_space += sizeof(e->event);
5316 spin_unlock_irqrestore(&dev->event_lock, flags);
5317 kfree(e);
5318 }
5319 /* Keep the old fb, don't unref it. */
5320 crtc->primary->old_fb = NULL;
5321 } else {
5322 crtc->primary->fb = fb;
5323 /* Unref only the old framebuffer. */
5324 fb = NULL;
5325 }
5326
5327 out:
5328 if (fb)
5329 drm_framebuffer_unreference(fb);
5330 if (crtc->primary->old_fb)
5331 drm_framebuffer_unreference(crtc->primary->old_fb);
5332 crtc->primary->old_fb = NULL;
5333 drm_modeset_unlock_crtc(crtc);
5334
5335 return ret;
5336 }
5337
5338 /**
5339 * drm_mode_config_reset - call ->reset callbacks
5340 * @dev: drm device
5341 *
5342 * This functions calls all the crtc's, encoder's and connector's ->reset
5343 * callback. Drivers can use this in e.g. their driver load or resume code to
5344 * reset hardware and software state.
5345 */
drm_mode_config_reset(struct drm_device * dev)5346 void drm_mode_config_reset(struct drm_device *dev)
5347 {
5348 struct drm_crtc *crtc;
5349 struct drm_plane *plane;
5350 struct drm_encoder *encoder;
5351 struct drm_connector *connector;
5352
5353 drm_for_each_plane(plane, dev)
5354 if (plane->funcs->reset)
5355 plane->funcs->reset(plane);
5356
5357 drm_for_each_crtc(crtc, dev)
5358 if (crtc->funcs->reset)
5359 crtc->funcs->reset(crtc);
5360
5361 drm_for_each_encoder(encoder, dev)
5362 if (encoder->funcs->reset)
5363 encoder->funcs->reset(encoder);
5364
5365 mutex_lock(&dev->mode_config.mutex);
5366 drm_for_each_connector(connector, dev)
5367 if (connector->funcs->reset)
5368 connector->funcs->reset(connector);
5369 mutex_unlock(&dev->mode_config.mutex);
5370 }
5371 EXPORT_SYMBOL(drm_mode_config_reset);
5372
5373 /**
5374 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer
5375 * @dev: DRM device
5376 * @data: ioctl data
5377 * @file_priv: DRM file info
5378 *
5379 * This creates a new dumb buffer in the driver's backing storage manager (GEM,
5380 * TTM or something else entirely) and returns the resulting buffer handle. This
5381 * handle can then be wrapped up into a framebuffer modeset object.
5382 *
5383 * Note that userspace is not allowed to use such objects for render
5384 * acceleration - drivers must create their own private ioctls for such a use
5385 * case.
5386 *
5387 * Called by the user via ioctl.
5388 *
5389 * Returns:
5390 * Zero on success, negative errno on failure.
5391 */
drm_mode_create_dumb_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)5392 int drm_mode_create_dumb_ioctl(struct drm_device *dev,
5393 void *data, struct drm_file *file_priv)
5394 {
5395 struct drm_mode_create_dumb *args = data;
5396 u32 cpp, stride, size;
5397
5398 if (!dev->driver->dumb_create)
5399 return -ENOSYS;
5400 if (!args->width || !args->height || !args->bpp)
5401 return -EINVAL;
5402
5403 /* overflow checks for 32bit size calculations */
5404 /* NOTE: DIV_ROUND_UP() can overflow */
5405 cpp = DIV_ROUND_UP(args->bpp, 8);
5406 if (!cpp || cpp > 0xffffffffU / args->width)
5407 return -EINVAL;
5408 stride = cpp * args->width;
5409 if (args->height > 0xffffffffU / stride)
5410 return -EINVAL;
5411
5412 /* test for wrap-around */
5413 size = args->height * stride;
5414 if (PAGE_ALIGN(size) == 0)
5415 return -EINVAL;
5416
5417 /*
5418 * handle, pitch and size are output parameters. Zero them out to
5419 * prevent drivers from accidentally using uninitialized data. Since
5420 * not all existing userspace is clearing these fields properly we
5421 * cannot reject IOCTL with garbage in them.
5422 */
5423 args->handle = 0;
5424 args->pitch = 0;
5425 args->size = 0;
5426
5427 return dev->driver->dumb_create(file_priv, dev, args);
5428 }
5429
5430 /**
5431 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer
5432 * @dev: DRM device
5433 * @data: ioctl data
5434 * @file_priv: DRM file info
5435 *
5436 * Allocate an offset in the drm device node's address space to be able to
5437 * memory map a dumb buffer.
5438 *
5439 * Called by the user via ioctl.
5440 *
5441 * Returns:
5442 * Zero on success, negative errno on failure.
5443 */
drm_mode_mmap_dumb_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)5444 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
5445 void *data, struct drm_file *file_priv)
5446 {
5447 struct drm_mode_map_dumb *args = data;
5448
5449 /* call driver ioctl to get mmap offset */
5450 if (!dev->driver->dumb_map_offset)
5451 return -ENOSYS;
5452
5453 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
5454 }
5455
5456 /**
5457 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer
5458 * @dev: DRM device
5459 * @data: ioctl data
5460 * @file_priv: DRM file info
5461 *
5462 * This destroys the userspace handle for the given dumb backing storage buffer.
5463 * Since buffer objects must be reference counted in the kernel a buffer object
5464 * won't be immediately freed if a framebuffer modeset object still uses it.
5465 *
5466 * Called by the user via ioctl.
5467 *
5468 * Returns:
5469 * Zero on success, negative errno on failure.
5470 */
drm_mode_destroy_dumb_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)5471 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
5472 void *data, struct drm_file *file_priv)
5473 {
5474 struct drm_mode_destroy_dumb *args = data;
5475
5476 if (!dev->driver->dumb_destroy)
5477 return -ENOSYS;
5478
5479 return dev->driver->dumb_destroy(file_priv, dev, args->handle);
5480 }
5481
5482 /**
5483 * drm_fb_get_bpp_depth - get the bpp/depth values for format
5484 * @format: pixel format (DRM_FORMAT_*)
5485 * @depth: storage for the depth value
5486 * @bpp: storage for the bpp value
5487 *
5488 * This only supports RGB formats here for compat with code that doesn't use
5489 * pixel formats directly yet.
5490 */
drm_fb_get_bpp_depth(uint32_t format,unsigned int * depth,int * bpp)5491 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
5492 int *bpp)
5493 {
5494 switch (format) {
5495 case DRM_FORMAT_C8:
5496 case DRM_FORMAT_RGB332:
5497 case DRM_FORMAT_BGR233:
5498 *depth = 8;
5499 *bpp = 8;
5500 break;
5501 case DRM_FORMAT_XRGB1555:
5502 case DRM_FORMAT_XBGR1555:
5503 case DRM_FORMAT_RGBX5551:
5504 case DRM_FORMAT_BGRX5551:
5505 case DRM_FORMAT_ARGB1555:
5506 case DRM_FORMAT_ABGR1555:
5507 case DRM_FORMAT_RGBA5551:
5508 case DRM_FORMAT_BGRA5551:
5509 *depth = 15;
5510 *bpp = 16;
5511 break;
5512 case DRM_FORMAT_RGB565:
5513 case DRM_FORMAT_BGR565:
5514 *depth = 16;
5515 *bpp = 16;
5516 break;
5517 case DRM_FORMAT_RGB888:
5518 case DRM_FORMAT_BGR888:
5519 *depth = 24;
5520 *bpp = 24;
5521 break;
5522 case DRM_FORMAT_XRGB8888:
5523 case DRM_FORMAT_XBGR8888:
5524 case DRM_FORMAT_RGBX8888:
5525 case DRM_FORMAT_BGRX8888:
5526 *depth = 24;
5527 *bpp = 32;
5528 break;
5529 case DRM_FORMAT_XRGB2101010:
5530 case DRM_FORMAT_XBGR2101010:
5531 case DRM_FORMAT_RGBX1010102:
5532 case DRM_FORMAT_BGRX1010102:
5533 case DRM_FORMAT_ARGB2101010:
5534 case DRM_FORMAT_ABGR2101010:
5535 case DRM_FORMAT_RGBA1010102:
5536 case DRM_FORMAT_BGRA1010102:
5537 *depth = 30;
5538 *bpp = 32;
5539 break;
5540 case DRM_FORMAT_ARGB8888:
5541 case DRM_FORMAT_ABGR8888:
5542 case DRM_FORMAT_RGBA8888:
5543 case DRM_FORMAT_BGRA8888:
5544 *depth = 32;
5545 *bpp = 32;
5546 break;
5547 default:
5548 DRM_DEBUG_KMS("unsupported pixel format %s\n",
5549 drm_get_format_name(format));
5550 *depth = 0;
5551 *bpp = 0;
5552 break;
5553 }
5554 }
5555 EXPORT_SYMBOL(drm_fb_get_bpp_depth);
5556
5557 /**
5558 * drm_format_num_planes - get the number of planes for format
5559 * @format: pixel format (DRM_FORMAT_*)
5560 *
5561 * Returns:
5562 * The number of planes used by the specified pixel format.
5563 */
drm_format_num_planes(uint32_t format)5564 int drm_format_num_planes(uint32_t format)
5565 {
5566 switch (format) {
5567 case DRM_FORMAT_YUV410:
5568 case DRM_FORMAT_YVU410:
5569 case DRM_FORMAT_YUV411:
5570 case DRM_FORMAT_YVU411:
5571 case DRM_FORMAT_YUV420:
5572 case DRM_FORMAT_YVU420:
5573 case DRM_FORMAT_YUV422:
5574 case DRM_FORMAT_YVU422:
5575 case DRM_FORMAT_YUV444:
5576 case DRM_FORMAT_YVU444:
5577 return 3;
5578 case DRM_FORMAT_NV12:
5579 case DRM_FORMAT_NV21:
5580 case DRM_FORMAT_NV16:
5581 case DRM_FORMAT_NV61:
5582 case DRM_FORMAT_NV24:
5583 case DRM_FORMAT_NV42:
5584 return 2;
5585 default:
5586 return 1;
5587 }
5588 }
5589 EXPORT_SYMBOL(drm_format_num_planes);
5590
5591 /**
5592 * drm_format_plane_cpp - determine the bytes per pixel value
5593 * @format: pixel format (DRM_FORMAT_*)
5594 * @plane: plane index
5595 *
5596 * Returns:
5597 * The bytes per pixel value for the specified plane.
5598 */
drm_format_plane_cpp(uint32_t format,int plane)5599 int drm_format_plane_cpp(uint32_t format, int plane)
5600 {
5601 unsigned int depth;
5602 int bpp;
5603
5604 if (plane >= drm_format_num_planes(format))
5605 return 0;
5606
5607 switch (format) {
5608 case DRM_FORMAT_YUYV:
5609 case DRM_FORMAT_YVYU:
5610 case DRM_FORMAT_UYVY:
5611 case DRM_FORMAT_VYUY:
5612 return 2;
5613 case DRM_FORMAT_NV12:
5614 case DRM_FORMAT_NV21:
5615 case DRM_FORMAT_NV16:
5616 case DRM_FORMAT_NV61:
5617 case DRM_FORMAT_NV24:
5618 case DRM_FORMAT_NV42:
5619 return plane ? 2 : 1;
5620 case DRM_FORMAT_YUV410:
5621 case DRM_FORMAT_YVU410:
5622 case DRM_FORMAT_YUV411:
5623 case DRM_FORMAT_YVU411:
5624 case DRM_FORMAT_YUV420:
5625 case DRM_FORMAT_YVU420:
5626 case DRM_FORMAT_YUV422:
5627 case DRM_FORMAT_YVU422:
5628 case DRM_FORMAT_YUV444:
5629 case DRM_FORMAT_YVU444:
5630 return 1;
5631 default:
5632 drm_fb_get_bpp_depth(format, &depth, &bpp);
5633 return bpp >> 3;
5634 }
5635 }
5636 EXPORT_SYMBOL(drm_format_plane_cpp);
5637
5638 /**
5639 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
5640 * @format: pixel format (DRM_FORMAT_*)
5641 *
5642 * Returns:
5643 * The horizontal chroma subsampling factor for the
5644 * specified pixel format.
5645 */
drm_format_horz_chroma_subsampling(uint32_t format)5646 int drm_format_horz_chroma_subsampling(uint32_t format)
5647 {
5648 switch (format) {
5649 case DRM_FORMAT_YUV411:
5650 case DRM_FORMAT_YVU411:
5651 case DRM_FORMAT_YUV410:
5652 case DRM_FORMAT_YVU410:
5653 return 4;
5654 case DRM_FORMAT_YUYV:
5655 case DRM_FORMAT_YVYU:
5656 case DRM_FORMAT_UYVY:
5657 case DRM_FORMAT_VYUY:
5658 case DRM_FORMAT_NV12:
5659 case DRM_FORMAT_NV21:
5660 case DRM_FORMAT_NV16:
5661 case DRM_FORMAT_NV61:
5662 case DRM_FORMAT_YUV422:
5663 case DRM_FORMAT_YVU422:
5664 case DRM_FORMAT_YUV420:
5665 case DRM_FORMAT_YVU420:
5666 return 2;
5667 default:
5668 return 1;
5669 }
5670 }
5671 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
5672
5673 /**
5674 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
5675 * @format: pixel format (DRM_FORMAT_*)
5676 *
5677 * Returns:
5678 * The vertical chroma subsampling factor for the
5679 * specified pixel format.
5680 */
drm_format_vert_chroma_subsampling(uint32_t format)5681 int drm_format_vert_chroma_subsampling(uint32_t format)
5682 {
5683 switch (format) {
5684 case DRM_FORMAT_YUV410:
5685 case DRM_FORMAT_YVU410:
5686 return 4;
5687 case DRM_FORMAT_YUV420:
5688 case DRM_FORMAT_YVU420:
5689 case DRM_FORMAT_NV12:
5690 case DRM_FORMAT_NV21:
5691 return 2;
5692 default:
5693 return 1;
5694 }
5695 }
5696 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
5697
5698 /**
5699 * drm_rotation_simplify() - Try to simplify the rotation
5700 * @rotation: Rotation to be simplified
5701 * @supported_rotations: Supported rotations
5702 *
5703 * Attempt to simplify the rotation to a form that is supported.
5704 * Eg. if the hardware supports everything except DRM_REFLECT_X
5705 * one could call this function like this:
5706 *
5707 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) |
5708 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) |
5709 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y));
5710 *
5711 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of
5712 * transforms the hardware supports, this function may not
5713 * be able to produce a supported transform, so the caller should
5714 * check the result afterwards.
5715 */
drm_rotation_simplify(unsigned int rotation,unsigned int supported_rotations)5716 unsigned int drm_rotation_simplify(unsigned int rotation,
5717 unsigned int supported_rotations)
5718 {
5719 if (rotation & ~supported_rotations) {
5720 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y);
5721 rotation = (rotation & DRM_REFLECT_MASK) |
5722 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4);
5723 }
5724
5725 return rotation;
5726 }
5727 EXPORT_SYMBOL(drm_rotation_simplify);
5728
5729 /**
5730 * drm_mode_config_init - initialize DRM mode_configuration structure
5731 * @dev: DRM device
5732 *
5733 * Initialize @dev's mode_config structure, used for tracking the graphics
5734 * configuration of @dev.
5735 *
5736 * Since this initializes the modeset locks, no locking is possible. Which is no
5737 * problem, since this should happen single threaded at init time. It is the
5738 * driver's problem to ensure this guarantee.
5739 *
5740 */
drm_mode_config_init(struct drm_device * dev)5741 void drm_mode_config_init(struct drm_device *dev)
5742 {
5743 mutex_init(&dev->mode_config.mutex);
5744 drm_modeset_lock_init(&dev->mode_config.connection_mutex);
5745 mutex_init(&dev->mode_config.idr_mutex);
5746 mutex_init(&dev->mode_config.fb_lock);
5747 mutex_init(&dev->mode_config.blob_lock);
5748 INIT_LIST_HEAD(&dev->mode_config.fb_list);
5749 INIT_LIST_HEAD(&dev->mode_config.crtc_list);
5750 INIT_LIST_HEAD(&dev->mode_config.connector_list);
5751 INIT_LIST_HEAD(&dev->mode_config.encoder_list);
5752 INIT_LIST_HEAD(&dev->mode_config.property_list);
5753 INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
5754 INIT_LIST_HEAD(&dev->mode_config.plane_list);
5755 idr_init(&dev->mode_config.crtc_idr);
5756 idr_init(&dev->mode_config.tile_idr);
5757
5758 drm_modeset_lock_all(dev);
5759 drm_mode_create_standard_properties(dev);
5760 drm_modeset_unlock_all(dev);
5761
5762 /* Just to be sure */
5763 dev->mode_config.num_fb = 0;
5764 dev->mode_config.num_connector = 0;
5765 dev->mode_config.num_crtc = 0;
5766 dev->mode_config.num_encoder = 0;
5767 dev->mode_config.num_overlay_plane = 0;
5768 dev->mode_config.num_total_plane = 0;
5769 }
5770 EXPORT_SYMBOL(drm_mode_config_init);
5771
5772 /**
5773 * drm_mode_config_cleanup - free up DRM mode_config info
5774 * @dev: DRM device
5775 *
5776 * Free up all the connectors and CRTCs associated with this DRM device, then
5777 * free up the framebuffers and associated buffer objects.
5778 *
5779 * Note that since this /should/ happen single-threaded at driver/device
5780 * teardown time, no locking is required. It's the driver's job to ensure that
5781 * this guarantee actually holds true.
5782 *
5783 * FIXME: cleanup any dangling user buffer objects too
5784 */
drm_mode_config_cleanup(struct drm_device * dev)5785 void drm_mode_config_cleanup(struct drm_device *dev)
5786 {
5787 struct drm_connector *connector, *ot;
5788 struct drm_crtc *crtc, *ct;
5789 struct drm_encoder *encoder, *enct;
5790 struct drm_framebuffer *fb, *fbt;
5791 struct drm_property *property, *pt;
5792 struct drm_property_blob *blob, *bt;
5793 struct drm_plane *plane, *plt;
5794
5795 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
5796 head) {
5797 encoder->funcs->destroy(encoder);
5798 }
5799
5800 list_for_each_entry_safe(connector, ot,
5801 &dev->mode_config.connector_list, head) {
5802 connector->funcs->destroy(connector);
5803 }
5804
5805 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
5806 head) {
5807 drm_property_destroy(dev, property);
5808 }
5809
5810 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
5811 head_global) {
5812 drm_property_unreference_blob(blob);
5813 }
5814
5815 /*
5816 * Single-threaded teardown context, so it's not required to grab the
5817 * fb_lock to protect against concurrent fb_list access. Contrary, it
5818 * would actually deadlock with the drm_framebuffer_cleanup function.
5819 *
5820 * Also, if there are any framebuffers left, that's a driver leak now,
5821 * so politely WARN about this.
5822 */
5823 WARN_ON(!list_empty(&dev->mode_config.fb_list));
5824 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
5825 drm_framebuffer_free(&fb->refcount);
5826 }
5827
5828 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
5829 head) {
5830 plane->funcs->destroy(plane);
5831 }
5832
5833 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
5834 crtc->funcs->destroy(crtc);
5835 }
5836
5837 idr_destroy(&dev->mode_config.tile_idr);
5838 idr_destroy(&dev->mode_config.crtc_idr);
5839 drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
5840 }
5841 EXPORT_SYMBOL(drm_mode_config_cleanup);
5842
drm_mode_create_rotation_property(struct drm_device * dev,unsigned int supported_rotations)5843 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
5844 unsigned int supported_rotations)
5845 {
5846 static const struct drm_prop_enum_list props[] = {
5847 { DRM_ROTATE_0, "rotate-0" },
5848 { DRM_ROTATE_90, "rotate-90" },
5849 { DRM_ROTATE_180, "rotate-180" },
5850 { DRM_ROTATE_270, "rotate-270" },
5851 { DRM_REFLECT_X, "reflect-x" },
5852 { DRM_REFLECT_Y, "reflect-y" },
5853 };
5854
5855 return drm_property_create_bitmask(dev, 0, "rotation",
5856 props, ARRAY_SIZE(props),
5857 supported_rotations);
5858 }
5859 EXPORT_SYMBOL(drm_mode_create_rotation_property);
5860
5861 /**
5862 * DOC: Tile group
5863 *
5864 * Tile groups are used to represent tiled monitors with a unique
5865 * integer identifier. Tiled monitors using DisplayID v1.3 have
5866 * a unique 8-byte handle, we store this in a tile group, so we
5867 * have a common identifier for all tiles in a monitor group.
5868 */
drm_tile_group_free(struct kref * kref)5869 static void drm_tile_group_free(struct kref *kref)
5870 {
5871 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
5872 struct drm_device *dev = tg->dev;
5873 mutex_lock(&dev->mode_config.idr_mutex);
5874 idr_remove(&dev->mode_config.tile_idr, tg->id);
5875 mutex_unlock(&dev->mode_config.idr_mutex);
5876 kfree(tg);
5877 }
5878
5879 /**
5880 * drm_mode_put_tile_group - drop a reference to a tile group.
5881 * @dev: DRM device
5882 * @tg: tile group to drop reference to.
5883 *
5884 * drop reference to tile group and free if 0.
5885 */
drm_mode_put_tile_group(struct drm_device * dev,struct drm_tile_group * tg)5886 void drm_mode_put_tile_group(struct drm_device *dev,
5887 struct drm_tile_group *tg)
5888 {
5889 kref_put(&tg->refcount, drm_tile_group_free);
5890 }
5891
5892 /**
5893 * drm_mode_get_tile_group - get a reference to an existing tile group
5894 * @dev: DRM device
5895 * @topology: 8-bytes unique per monitor.
5896 *
5897 * Use the unique bytes to get a reference to an existing tile group.
5898 *
5899 * RETURNS:
5900 * tile group or NULL if not found.
5901 */
drm_mode_get_tile_group(struct drm_device * dev,char topology[8])5902 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev,
5903 char topology[8])
5904 {
5905 struct drm_tile_group *tg;
5906 int id;
5907 mutex_lock(&dev->mode_config.idr_mutex);
5908 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
5909 if (!memcmp(tg->group_data, topology, 8)) {
5910 if (!kref_get_unless_zero(&tg->refcount))
5911 tg = NULL;
5912 mutex_unlock(&dev->mode_config.idr_mutex);
5913 return tg;
5914 }
5915 }
5916 mutex_unlock(&dev->mode_config.idr_mutex);
5917 return NULL;
5918 }
5919 EXPORT_SYMBOL(drm_mode_get_tile_group);
5920
5921 /**
5922 * drm_mode_create_tile_group - create a tile group from a displayid description
5923 * @dev: DRM device
5924 * @topology: 8-bytes unique per monitor.
5925 *
5926 * Create a tile group for the unique monitor, and get a unique
5927 * identifier for the tile group.
5928 *
5929 * RETURNS:
5930 * new tile group or error.
5931 */
drm_mode_create_tile_group(struct drm_device * dev,char topology[8])5932 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev,
5933 char topology[8])
5934 {
5935 struct drm_tile_group *tg;
5936 int ret;
5937
5938 tg = kzalloc(sizeof(*tg), GFP_KERNEL);
5939 if (!tg)
5940 return ERR_PTR(-ENOMEM);
5941
5942 kref_init(&tg->refcount);
5943 memcpy(tg->group_data, topology, 8);
5944 tg->dev = dev;
5945
5946 mutex_lock(&dev->mode_config.idr_mutex);
5947 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
5948 if (ret >= 0) {
5949 tg->id = ret;
5950 } else {
5951 kfree(tg);
5952 tg = ERR_PTR(ret);
5953 }
5954
5955 mutex_unlock(&dev->mode_config.idr_mutex);
5956 return tg;
5957 }
5958 EXPORT_SYMBOL(drm_mode_create_tile_group);
5959