1 /*
2 * vsp1_video.c -- R-Car VSP1 Video Node
3 *
4 * Copyright (C) 2013-2015 Renesas Electronics Corporation
5 *
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include <linux/list.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/sched.h>
18 #include <linux/slab.h>
19 #include <linux/v4l2-mediabus.h>
20 #include <linux/videodev2.h>
21
22 #include <media/media-entity.h>
23 #include <media/v4l2-dev.h>
24 #include <media/v4l2-fh.h>
25 #include <media/v4l2-ioctl.h>
26 #include <media/v4l2-subdev.h>
27 #include <media/videobuf2-v4l2.h>
28 #include <media/videobuf2-dma-contig.h>
29
30 #include "vsp1.h"
31 #include "vsp1_bru.h"
32 #include "vsp1_entity.h"
33 #include "vsp1_rwpf.h"
34 #include "vsp1_uds.h"
35 #include "vsp1_video.h"
36
37 #define VSP1_VIDEO_DEF_FORMAT V4L2_PIX_FMT_YUYV
38 #define VSP1_VIDEO_DEF_WIDTH 1024
39 #define VSP1_VIDEO_DEF_HEIGHT 768
40
41 #define VSP1_VIDEO_MIN_WIDTH 2U
42 #define VSP1_VIDEO_MAX_WIDTH 8190U
43 #define VSP1_VIDEO_MIN_HEIGHT 2U
44 #define VSP1_VIDEO_MAX_HEIGHT 8190U
45
46 /* -----------------------------------------------------------------------------
47 * Helper functions
48 */
49
50 static const struct vsp1_format_info vsp1_video_formats[] = {
51 { V4L2_PIX_FMT_RGB332, MEDIA_BUS_FMT_ARGB8888_1X32,
52 VI6_FMT_RGB_332, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
53 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
54 1, { 8, 0, 0 }, false, false, 1, 1, false },
55 { V4L2_PIX_FMT_ARGB444, MEDIA_BUS_FMT_ARGB8888_1X32,
56 VI6_FMT_ARGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
57 VI6_RPF_DSWAP_P_WDS,
58 1, { 16, 0, 0 }, false, false, 1, 1, true },
59 { V4L2_PIX_FMT_XRGB444, MEDIA_BUS_FMT_ARGB8888_1X32,
60 VI6_FMT_XRGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
61 VI6_RPF_DSWAP_P_WDS,
62 1, { 16, 0, 0 }, false, false, 1, 1, true },
63 { V4L2_PIX_FMT_ARGB555, MEDIA_BUS_FMT_ARGB8888_1X32,
64 VI6_FMT_ARGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
65 VI6_RPF_DSWAP_P_WDS,
66 1, { 16, 0, 0 }, false, false, 1, 1, true },
67 { V4L2_PIX_FMT_XRGB555, MEDIA_BUS_FMT_ARGB8888_1X32,
68 VI6_FMT_XRGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
69 VI6_RPF_DSWAP_P_WDS,
70 1, { 16, 0, 0 }, false, false, 1, 1, false },
71 { V4L2_PIX_FMT_RGB565, MEDIA_BUS_FMT_ARGB8888_1X32,
72 VI6_FMT_RGB_565, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
73 VI6_RPF_DSWAP_P_WDS,
74 1, { 16, 0, 0 }, false, false, 1, 1, false },
75 { V4L2_PIX_FMT_BGR24, MEDIA_BUS_FMT_ARGB8888_1X32,
76 VI6_FMT_BGR_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
77 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
78 1, { 24, 0, 0 }, false, false, 1, 1, false },
79 { V4L2_PIX_FMT_RGB24, MEDIA_BUS_FMT_ARGB8888_1X32,
80 VI6_FMT_RGB_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
81 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
82 1, { 24, 0, 0 }, false, false, 1, 1, false },
83 { V4L2_PIX_FMT_ABGR32, MEDIA_BUS_FMT_ARGB8888_1X32,
84 VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
85 1, { 32, 0, 0 }, false, false, 1, 1, true },
86 { V4L2_PIX_FMT_XBGR32, MEDIA_BUS_FMT_ARGB8888_1X32,
87 VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS,
88 1, { 32, 0, 0 }, false, false, 1, 1, false },
89 { V4L2_PIX_FMT_ARGB32, MEDIA_BUS_FMT_ARGB8888_1X32,
90 VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
91 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
92 1, { 32, 0, 0 }, false, false, 1, 1, true },
93 { V4L2_PIX_FMT_XRGB32, MEDIA_BUS_FMT_ARGB8888_1X32,
94 VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
95 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
96 1, { 32, 0, 0 }, false, false, 1, 1, false },
97 { V4L2_PIX_FMT_UYVY, MEDIA_BUS_FMT_AYUV8_1X32,
98 VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
99 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
100 1, { 16, 0, 0 }, false, false, 2, 1, false },
101 { V4L2_PIX_FMT_VYUY, MEDIA_BUS_FMT_AYUV8_1X32,
102 VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
103 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
104 1, { 16, 0, 0 }, false, true, 2, 1, false },
105 { V4L2_PIX_FMT_YUYV, MEDIA_BUS_FMT_AYUV8_1X32,
106 VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
107 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
108 1, { 16, 0, 0 }, true, false, 2, 1, false },
109 { V4L2_PIX_FMT_YVYU, MEDIA_BUS_FMT_AYUV8_1X32,
110 VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
111 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
112 1, { 16, 0, 0 }, true, true, 2, 1, false },
113 { V4L2_PIX_FMT_NV12M, MEDIA_BUS_FMT_AYUV8_1X32,
114 VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
115 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
116 2, { 8, 16, 0 }, false, false, 2, 2, false },
117 { V4L2_PIX_FMT_NV21M, MEDIA_BUS_FMT_AYUV8_1X32,
118 VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
119 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
120 2, { 8, 16, 0 }, false, true, 2, 2, false },
121 { V4L2_PIX_FMT_NV16M, MEDIA_BUS_FMT_AYUV8_1X32,
122 VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
123 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
124 2, { 8, 16, 0 }, false, false, 2, 1, false },
125 { V4L2_PIX_FMT_NV61M, MEDIA_BUS_FMT_AYUV8_1X32,
126 VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
127 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
128 2, { 8, 16, 0 }, false, true, 2, 1, false },
129 { V4L2_PIX_FMT_YUV420M, MEDIA_BUS_FMT_AYUV8_1X32,
130 VI6_FMT_Y_U_V_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
131 VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS,
132 3, { 8, 8, 8 }, false, false, 2, 2, false },
133 };
134
135 /*
136 * vsp1_get_format_info - Retrieve format information for a 4CC
137 * @fourcc: the format 4CC
138 *
139 * Return a pointer to the format information structure corresponding to the
140 * given V4L2 format 4CC, or NULL if no corresponding format can be found.
141 */
vsp1_get_format_info(u32 fourcc)142 static const struct vsp1_format_info *vsp1_get_format_info(u32 fourcc)
143 {
144 unsigned int i;
145
146 for (i = 0; i < ARRAY_SIZE(vsp1_video_formats); ++i) {
147 const struct vsp1_format_info *info = &vsp1_video_formats[i];
148
149 if (info->fourcc == fourcc)
150 return info;
151 }
152
153 return NULL;
154 }
155
156
157 static struct v4l2_subdev *
vsp1_video_remote_subdev(struct media_pad * local,u32 * pad)158 vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
159 {
160 struct media_pad *remote;
161
162 remote = media_entity_remote_pad(local);
163 if (remote == NULL ||
164 media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
165 return NULL;
166
167 if (pad)
168 *pad = remote->index;
169
170 return media_entity_to_v4l2_subdev(remote->entity);
171 }
172
vsp1_video_verify_format(struct vsp1_video * video)173 static int vsp1_video_verify_format(struct vsp1_video *video)
174 {
175 struct v4l2_subdev_format fmt;
176 struct v4l2_subdev *subdev;
177 int ret;
178
179 subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad);
180 if (subdev == NULL)
181 return -EINVAL;
182
183 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
184 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
185 if (ret < 0)
186 return ret == -ENOIOCTLCMD ? -EINVAL : ret;
187
188 if (video->fmtinfo->mbus != fmt.format.code ||
189 video->format.height != fmt.format.height ||
190 video->format.width != fmt.format.width)
191 return -EINVAL;
192
193 return 0;
194 }
195
__vsp1_video_try_format(struct vsp1_video * video,struct v4l2_pix_format_mplane * pix,const struct vsp1_format_info ** fmtinfo)196 static int __vsp1_video_try_format(struct vsp1_video *video,
197 struct v4l2_pix_format_mplane *pix,
198 const struct vsp1_format_info **fmtinfo)
199 {
200 static const u32 xrgb_formats[][2] = {
201 { V4L2_PIX_FMT_RGB444, V4L2_PIX_FMT_XRGB444 },
202 { V4L2_PIX_FMT_RGB555, V4L2_PIX_FMT_XRGB555 },
203 { V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_XBGR32 },
204 { V4L2_PIX_FMT_RGB32, V4L2_PIX_FMT_XRGB32 },
205 };
206
207 const struct vsp1_format_info *info;
208 unsigned int width = pix->width;
209 unsigned int height = pix->height;
210 unsigned int i;
211
212 /* Backward compatibility: replace deprecated RGB formats by their XRGB
213 * equivalent. This selects the format older userspace applications want
214 * while still exposing the new format.
215 */
216 for (i = 0; i < ARRAY_SIZE(xrgb_formats); ++i) {
217 if (xrgb_formats[i][0] == pix->pixelformat) {
218 pix->pixelformat = xrgb_formats[i][1];
219 break;
220 }
221 }
222
223 /* Retrieve format information and select the default format if the
224 * requested format isn't supported.
225 */
226 info = vsp1_get_format_info(pix->pixelformat);
227 if (info == NULL)
228 info = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
229
230 pix->pixelformat = info->fourcc;
231 pix->colorspace = V4L2_COLORSPACE_SRGB;
232 pix->field = V4L2_FIELD_NONE;
233 memset(pix->reserved, 0, sizeof(pix->reserved));
234
235 /* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */
236 width = round_down(width, info->hsub);
237 height = round_down(height, info->vsub);
238
239 /* Clamp the width and height. */
240 pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
241 pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
242 VSP1_VIDEO_MAX_HEIGHT);
243
244 /* Compute and clamp the stride and image size. While not documented in
245 * the datasheet, strides not aligned to a multiple of 128 bytes result
246 * in image corruption.
247 */
248 for (i = 0; i < min(info->planes, 2U); ++i) {
249 unsigned int hsub = i > 0 ? info->hsub : 1;
250 unsigned int vsub = i > 0 ? info->vsub : 1;
251 unsigned int align = 128;
252 unsigned int bpl;
253
254 bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline,
255 pix->width / hsub * info->bpp[i] / 8,
256 round_down(65535U, align));
257
258 pix->plane_fmt[i].bytesperline = round_up(bpl, align);
259 pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline
260 * pix->height / vsub;
261 }
262
263 if (info->planes == 3) {
264 /* The second and third planes must have the same stride. */
265 pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline;
266 pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage;
267 }
268
269 pix->num_planes = info->planes;
270
271 if (fmtinfo)
272 *fmtinfo = info;
273
274 return 0;
275 }
276
277 static bool
vsp1_video_format_adjust(struct vsp1_video * video,const struct v4l2_pix_format_mplane * format,struct v4l2_pix_format_mplane * adjust)278 vsp1_video_format_adjust(struct vsp1_video *video,
279 const struct v4l2_pix_format_mplane *format,
280 struct v4l2_pix_format_mplane *adjust)
281 {
282 unsigned int i;
283
284 *adjust = *format;
285 __vsp1_video_try_format(video, adjust, NULL);
286
287 if (format->width != adjust->width ||
288 format->height != adjust->height ||
289 format->pixelformat != adjust->pixelformat ||
290 format->num_planes != adjust->num_planes)
291 return false;
292
293 for (i = 0; i < format->num_planes; ++i) {
294 if (format->plane_fmt[i].bytesperline !=
295 adjust->plane_fmt[i].bytesperline)
296 return false;
297
298 adjust->plane_fmt[i].sizeimage =
299 max(adjust->plane_fmt[i].sizeimage,
300 format->plane_fmt[i].sizeimage);
301 }
302
303 return true;
304 }
305
306 /* -----------------------------------------------------------------------------
307 * Pipeline Management
308 */
309
vsp1_pipeline_validate_branch(struct vsp1_pipeline * pipe,struct vsp1_rwpf * input,struct vsp1_rwpf * output)310 static int vsp1_pipeline_validate_branch(struct vsp1_pipeline *pipe,
311 struct vsp1_rwpf *input,
312 struct vsp1_rwpf *output)
313 {
314 struct vsp1_entity *entity;
315 unsigned int entities = 0;
316 struct media_pad *pad;
317 bool bru_found = false;
318
319 input->location.left = 0;
320 input->location.top = 0;
321
322 pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]);
323
324 while (1) {
325 if (pad == NULL)
326 return -EPIPE;
327
328 /* We've reached a video node, that shouldn't have happened. */
329 if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
330 return -EPIPE;
331
332 entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
333
334 /* A BRU is present in the pipeline, store the compose rectangle
335 * location in the input RPF for use when configuring the RPF.
336 */
337 if (entity->type == VSP1_ENTITY_BRU) {
338 struct vsp1_bru *bru = to_bru(&entity->subdev);
339 struct v4l2_rect *rect =
340 &bru->inputs[pad->index].compose;
341
342 bru->inputs[pad->index].rpf = input;
343
344 input->location.left = rect->left;
345 input->location.top = rect->top;
346
347 bru_found = true;
348 }
349
350 /* We've reached the WPF, we're done. */
351 if (entity->type == VSP1_ENTITY_WPF)
352 break;
353
354 /* Ensure the branch has no loop. */
355 if (entities & (1 << entity->subdev.entity.id))
356 return -EPIPE;
357
358 entities |= 1 << entity->subdev.entity.id;
359
360 /* UDS can't be chained. */
361 if (entity->type == VSP1_ENTITY_UDS) {
362 if (pipe->uds)
363 return -EPIPE;
364
365 pipe->uds = entity;
366 pipe->uds_input = bru_found ? pipe->bru
367 : &input->entity;
368 }
369
370 /* Follow the source link. The link setup operations ensure
371 * that the output fan-out can't be more than one, there is thus
372 * no need to verify here that only a single source link is
373 * activated.
374 */
375 pad = &entity->pads[entity->source_pad];
376 pad = media_entity_remote_pad(pad);
377 }
378
379 /* The last entity must be the output WPF. */
380 if (entity != &output->entity)
381 return -EPIPE;
382
383 return 0;
384 }
385
__vsp1_pipeline_cleanup(struct vsp1_pipeline * pipe)386 static void __vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
387 {
388 if (pipe->bru) {
389 struct vsp1_bru *bru = to_bru(&pipe->bru->subdev);
390 unsigned int i;
391
392 for (i = 0; i < ARRAY_SIZE(bru->inputs); ++i)
393 bru->inputs[i].rpf = NULL;
394 }
395
396 INIT_LIST_HEAD(&pipe->entities);
397 pipe->state = VSP1_PIPELINE_STOPPED;
398 pipe->buffers_ready = 0;
399 pipe->num_video = 0;
400 pipe->num_inputs = 0;
401 pipe->output = NULL;
402 pipe->bru = NULL;
403 pipe->lif = NULL;
404 pipe->uds = NULL;
405 }
406
vsp1_pipeline_validate(struct vsp1_pipeline * pipe,struct vsp1_video * video)407 static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe,
408 struct vsp1_video *video)
409 {
410 struct media_entity_graph graph;
411 struct media_entity *entity = &video->video.entity;
412 struct media_device *mdev = entity->parent;
413 unsigned int i;
414 int ret;
415
416 mutex_lock(&mdev->graph_mutex);
417
418 /* Walk the graph to locate the entities and video nodes. */
419 media_entity_graph_walk_start(&graph, entity);
420
421 while ((entity = media_entity_graph_walk_next(&graph))) {
422 struct v4l2_subdev *subdev;
423 struct vsp1_rwpf *rwpf;
424 struct vsp1_entity *e;
425
426 if (media_entity_type(entity) != MEDIA_ENT_T_V4L2_SUBDEV) {
427 pipe->num_video++;
428 continue;
429 }
430
431 subdev = media_entity_to_v4l2_subdev(entity);
432 e = to_vsp1_entity(subdev);
433 list_add_tail(&e->list_pipe, &pipe->entities);
434
435 if (e->type == VSP1_ENTITY_RPF) {
436 rwpf = to_rwpf(subdev);
437 pipe->inputs[pipe->num_inputs++] = rwpf;
438 rwpf->video.pipe_index = pipe->num_inputs;
439 } else if (e->type == VSP1_ENTITY_WPF) {
440 rwpf = to_rwpf(subdev);
441 pipe->output = to_rwpf(subdev);
442 rwpf->video.pipe_index = 0;
443 } else if (e->type == VSP1_ENTITY_LIF) {
444 pipe->lif = e;
445 } else if (e->type == VSP1_ENTITY_BRU) {
446 pipe->bru = e;
447 }
448 }
449
450 mutex_unlock(&mdev->graph_mutex);
451
452 /* We need one output and at least one input. */
453 if (pipe->num_inputs == 0 || !pipe->output) {
454 ret = -EPIPE;
455 goto error;
456 }
457
458 /* Follow links downstream for each input and make sure the graph
459 * contains no loop and that all branches end at the output WPF.
460 */
461 for (i = 0; i < pipe->num_inputs; ++i) {
462 ret = vsp1_pipeline_validate_branch(pipe, pipe->inputs[i],
463 pipe->output);
464 if (ret < 0)
465 goto error;
466 }
467
468 return 0;
469
470 error:
471 __vsp1_pipeline_cleanup(pipe);
472 return ret;
473 }
474
vsp1_pipeline_init(struct vsp1_pipeline * pipe,struct vsp1_video * video)475 static int vsp1_pipeline_init(struct vsp1_pipeline *pipe,
476 struct vsp1_video *video)
477 {
478 int ret;
479
480 mutex_lock(&pipe->lock);
481
482 /* If we're the first user validate and initialize the pipeline. */
483 if (pipe->use_count == 0) {
484 ret = vsp1_pipeline_validate(pipe, video);
485 if (ret < 0)
486 goto done;
487 }
488
489 pipe->use_count++;
490 ret = 0;
491
492 done:
493 mutex_unlock(&pipe->lock);
494 return ret;
495 }
496
vsp1_pipeline_cleanup(struct vsp1_pipeline * pipe)497 static void vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe)
498 {
499 mutex_lock(&pipe->lock);
500
501 /* If we're the last user clean up the pipeline. */
502 if (--pipe->use_count == 0)
503 __vsp1_pipeline_cleanup(pipe);
504
505 mutex_unlock(&pipe->lock);
506 }
507
vsp1_pipeline_run(struct vsp1_pipeline * pipe)508 static void vsp1_pipeline_run(struct vsp1_pipeline *pipe)
509 {
510 struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
511
512 vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index), VI6_CMD_STRCMD);
513 pipe->state = VSP1_PIPELINE_RUNNING;
514 pipe->buffers_ready = 0;
515 }
516
vsp1_pipeline_stopped(struct vsp1_pipeline * pipe)517 static bool vsp1_pipeline_stopped(struct vsp1_pipeline *pipe)
518 {
519 unsigned long flags;
520 bool stopped;
521
522 spin_lock_irqsave(&pipe->irqlock, flags);
523 stopped = pipe->state == VSP1_PIPELINE_STOPPED,
524 spin_unlock_irqrestore(&pipe->irqlock, flags);
525
526 return stopped;
527 }
528
vsp1_pipeline_stop(struct vsp1_pipeline * pipe)529 static int vsp1_pipeline_stop(struct vsp1_pipeline *pipe)
530 {
531 struct vsp1_entity *entity;
532 unsigned long flags;
533 int ret;
534
535 spin_lock_irqsave(&pipe->irqlock, flags);
536 if (pipe->state == VSP1_PIPELINE_RUNNING)
537 pipe->state = VSP1_PIPELINE_STOPPING;
538 spin_unlock_irqrestore(&pipe->irqlock, flags);
539
540 ret = wait_event_timeout(pipe->wq, vsp1_pipeline_stopped(pipe),
541 msecs_to_jiffies(500));
542 ret = ret == 0 ? -ETIMEDOUT : 0;
543
544 list_for_each_entry(entity, &pipe->entities, list_pipe) {
545 if (entity->route && entity->route->reg)
546 vsp1_write(entity->vsp1, entity->route->reg,
547 VI6_DPR_NODE_UNUSED);
548
549 v4l2_subdev_call(&entity->subdev, video, s_stream, 0);
550 }
551
552 return ret;
553 }
554
vsp1_pipeline_ready(struct vsp1_pipeline * pipe)555 static bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe)
556 {
557 unsigned int mask;
558
559 mask = ((1 << pipe->num_inputs) - 1) << 1;
560 if (!pipe->lif)
561 mask |= 1 << 0;
562
563 return pipe->buffers_ready == mask;
564 }
565
566 /*
567 * vsp1_video_complete_buffer - Complete the current buffer
568 * @video: the video node
569 *
570 * This function completes the current buffer by filling its sequence number,
571 * time stamp and payload size, and hands it back to the videobuf core.
572 *
573 * When operating in DU output mode (deep pipeline to the DU through the LIF),
574 * the VSP1 needs to constantly supply frames to the display. In that case, if
575 * no other buffer is queued, reuse the one that has just been processed instead
576 * of handing it back to the videobuf core.
577 *
578 * Return the next queued buffer or NULL if the queue is empty.
579 */
580 static struct vsp1_video_buffer *
vsp1_video_complete_buffer(struct vsp1_video * video)581 vsp1_video_complete_buffer(struct vsp1_video *video)
582 {
583 struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
584 struct vsp1_video_buffer *next = NULL;
585 struct vsp1_video_buffer *done;
586 unsigned long flags;
587 unsigned int i;
588
589 spin_lock_irqsave(&video->irqlock, flags);
590
591 if (list_empty(&video->irqqueue)) {
592 spin_unlock_irqrestore(&video->irqlock, flags);
593 return NULL;
594 }
595
596 done = list_first_entry(&video->irqqueue,
597 struct vsp1_video_buffer, queue);
598
599 /* In DU output mode reuse the buffer if the list is singular. */
600 if (pipe->lif && list_is_singular(&video->irqqueue)) {
601 spin_unlock_irqrestore(&video->irqlock, flags);
602 return done;
603 }
604
605 list_del(&done->queue);
606
607 if (!list_empty(&video->irqqueue))
608 next = list_first_entry(&video->irqqueue,
609 struct vsp1_video_buffer, queue);
610
611 spin_unlock_irqrestore(&video->irqlock, flags);
612
613 done->buf.sequence = video->sequence++;
614 v4l2_get_timestamp(&done->buf.timestamp);
615 for (i = 0; i < done->buf.vb2_buf.num_planes; ++i)
616 vb2_set_plane_payload(&done->buf.vb2_buf, i, done->length[i]);
617 vb2_buffer_done(&done->buf.vb2_buf, VB2_BUF_STATE_DONE);
618
619 return next;
620 }
621
vsp1_video_frame_end(struct vsp1_pipeline * pipe,struct vsp1_video * video)622 static void vsp1_video_frame_end(struct vsp1_pipeline *pipe,
623 struct vsp1_video *video)
624 {
625 struct vsp1_video_buffer *buf;
626 unsigned long flags;
627
628 buf = vsp1_video_complete_buffer(video);
629 if (buf == NULL)
630 return;
631
632 spin_lock_irqsave(&pipe->irqlock, flags);
633
634 video->ops->queue(video, buf);
635 pipe->buffers_ready |= 1 << video->pipe_index;
636
637 spin_unlock_irqrestore(&pipe->irqlock, flags);
638 }
639
vsp1_pipeline_frame_end(struct vsp1_pipeline * pipe)640 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe)
641 {
642 enum vsp1_pipeline_state state;
643 unsigned long flags;
644 unsigned int i;
645
646 if (pipe == NULL)
647 return;
648
649 /* Complete buffers on all video nodes. */
650 for (i = 0; i < pipe->num_inputs; ++i)
651 vsp1_video_frame_end(pipe, &pipe->inputs[i]->video);
652
653 if (!pipe->lif)
654 vsp1_video_frame_end(pipe, &pipe->output->video);
655
656 spin_lock_irqsave(&pipe->irqlock, flags);
657
658 state = pipe->state;
659 pipe->state = VSP1_PIPELINE_STOPPED;
660
661 /* If a stop has been requested, mark the pipeline as stopped and
662 * return.
663 */
664 if (state == VSP1_PIPELINE_STOPPING) {
665 wake_up(&pipe->wq);
666 goto done;
667 }
668
669 /* Restart the pipeline if ready. */
670 if (vsp1_pipeline_ready(pipe))
671 vsp1_pipeline_run(pipe);
672
673 done:
674 spin_unlock_irqrestore(&pipe->irqlock, flags);
675 }
676
677 /*
678 * Propagate the alpha value through the pipeline.
679 *
680 * As the UDS has restricted scaling capabilities when the alpha component needs
681 * to be scaled, we disable alpha scaling when the UDS input has a fixed alpha
682 * value. The UDS then outputs a fixed alpha value which needs to be programmed
683 * from the input RPF alpha.
684 */
vsp1_pipeline_propagate_alpha(struct vsp1_pipeline * pipe,struct vsp1_entity * input,unsigned int alpha)685 void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe,
686 struct vsp1_entity *input,
687 unsigned int alpha)
688 {
689 struct vsp1_entity *entity;
690 struct media_pad *pad;
691
692 pad = media_entity_remote_pad(&input->pads[RWPF_PAD_SOURCE]);
693
694 while (pad) {
695 if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
696 break;
697
698 entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
699
700 /* The BRU background color has a fixed alpha value set to 255,
701 * the output alpha value is thus always equal to 255.
702 */
703 if (entity->type == VSP1_ENTITY_BRU)
704 alpha = 255;
705
706 if (entity->type == VSP1_ENTITY_UDS) {
707 struct vsp1_uds *uds = to_uds(&entity->subdev);
708
709 vsp1_uds_set_alpha(uds, alpha);
710 break;
711 }
712
713 pad = &entity->pads[entity->source_pad];
714 pad = media_entity_remote_pad(pad);
715 }
716 }
717
vsp1_pipelines_suspend(struct vsp1_device * vsp1)718 void vsp1_pipelines_suspend(struct vsp1_device *vsp1)
719 {
720 unsigned long flags;
721 unsigned int i;
722 int ret;
723
724 /* To avoid increasing the system suspend time needlessly, loop over the
725 * pipelines twice, first to set them all to the stopping state, and then
726 * to wait for the stop to complete.
727 */
728 for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
729 struct vsp1_rwpf *wpf = vsp1->wpf[i];
730 struct vsp1_pipeline *pipe;
731
732 if (wpf == NULL)
733 continue;
734
735 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
736 if (pipe == NULL)
737 continue;
738
739 spin_lock_irqsave(&pipe->irqlock, flags);
740 if (pipe->state == VSP1_PIPELINE_RUNNING)
741 pipe->state = VSP1_PIPELINE_STOPPING;
742 spin_unlock_irqrestore(&pipe->irqlock, flags);
743 }
744
745 for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
746 struct vsp1_rwpf *wpf = vsp1->wpf[i];
747 struct vsp1_pipeline *pipe;
748
749 if (wpf == NULL)
750 continue;
751
752 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
753 if (pipe == NULL)
754 continue;
755
756 ret = wait_event_timeout(pipe->wq, vsp1_pipeline_stopped(pipe),
757 msecs_to_jiffies(500));
758 if (ret == 0)
759 dev_warn(vsp1->dev, "pipeline %u stop timeout\n",
760 wpf->entity.index);
761 }
762 }
763
vsp1_pipelines_resume(struct vsp1_device * vsp1)764 void vsp1_pipelines_resume(struct vsp1_device *vsp1)
765 {
766 unsigned int i;
767
768 /* Resume pipeline all running pipelines. */
769 for (i = 0; i < vsp1->pdata.wpf_count; ++i) {
770 struct vsp1_rwpf *wpf = vsp1->wpf[i];
771 struct vsp1_pipeline *pipe;
772
773 if (wpf == NULL)
774 continue;
775
776 pipe = to_vsp1_pipeline(&wpf->entity.subdev.entity);
777 if (pipe == NULL)
778 continue;
779
780 if (vsp1_pipeline_ready(pipe))
781 vsp1_pipeline_run(pipe);
782 }
783 }
784
785 /* -----------------------------------------------------------------------------
786 * videobuf2 Queue Operations
787 */
788
789 static int
vsp1_video_queue_setup(struct vb2_queue * vq,const void * parg,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],void * alloc_ctxs[])790 vsp1_video_queue_setup(struct vb2_queue *vq, const void *parg,
791 unsigned int *nbuffers, unsigned int *nplanes,
792 unsigned int sizes[], void *alloc_ctxs[])
793 {
794 const struct v4l2_format *fmt = parg;
795 struct vsp1_video *video = vb2_get_drv_priv(vq);
796 const struct v4l2_pix_format_mplane *format;
797 struct v4l2_pix_format_mplane pix_mp;
798 unsigned int i;
799
800 if (fmt) {
801 /* Make sure the format is valid and adjust the sizeimage field
802 * if needed.
803 */
804 if (!vsp1_video_format_adjust(video, &fmt->fmt.pix_mp, &pix_mp))
805 return -EINVAL;
806
807 format = &pix_mp;
808 } else {
809 format = &video->format;
810 }
811
812 *nplanes = format->num_planes;
813
814 for (i = 0; i < format->num_planes; ++i) {
815 sizes[i] = format->plane_fmt[i].sizeimage;
816 alloc_ctxs[i] = video->alloc_ctx;
817 }
818
819 return 0;
820 }
821
vsp1_video_buffer_prepare(struct vb2_buffer * vb)822 static int vsp1_video_buffer_prepare(struct vb2_buffer *vb)
823 {
824 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
825 struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
826 struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vbuf);
827 const struct v4l2_pix_format_mplane *format = &video->format;
828 unsigned int i;
829
830 if (vb->num_planes < format->num_planes)
831 return -EINVAL;
832
833 for (i = 0; i < vb->num_planes; ++i) {
834 buf->addr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
835 buf->length[i] = vb2_plane_size(vb, i);
836
837 if (buf->length[i] < format->plane_fmt[i].sizeimage)
838 return -EINVAL;
839 }
840
841 return 0;
842 }
843
vsp1_video_buffer_queue(struct vb2_buffer * vb)844 static void vsp1_video_buffer_queue(struct vb2_buffer *vb)
845 {
846 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
847 struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue);
848 struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
849 struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vbuf);
850 unsigned long flags;
851 bool empty;
852
853 spin_lock_irqsave(&video->irqlock, flags);
854 empty = list_empty(&video->irqqueue);
855 list_add_tail(&buf->queue, &video->irqqueue);
856 spin_unlock_irqrestore(&video->irqlock, flags);
857
858 if (!empty)
859 return;
860
861 spin_lock_irqsave(&pipe->irqlock, flags);
862
863 video->ops->queue(video, buf);
864 pipe->buffers_ready |= 1 << video->pipe_index;
865
866 if (vb2_is_streaming(&video->queue) &&
867 vsp1_pipeline_ready(pipe))
868 vsp1_pipeline_run(pipe);
869
870 spin_unlock_irqrestore(&pipe->irqlock, flags);
871 }
872
vsp1_entity_route_setup(struct vsp1_entity * source)873 static void vsp1_entity_route_setup(struct vsp1_entity *source)
874 {
875 struct vsp1_entity *sink;
876
877 if (source->route->reg == 0)
878 return;
879
880 sink = container_of(source->sink, struct vsp1_entity, subdev.entity);
881 vsp1_write(source->vsp1, source->route->reg,
882 sink->route->inputs[source->sink_pad]);
883 }
884
vsp1_video_start_streaming(struct vb2_queue * vq,unsigned int count)885 static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
886 {
887 struct vsp1_video *video = vb2_get_drv_priv(vq);
888 struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
889 struct vsp1_entity *entity;
890 unsigned long flags;
891 int ret;
892
893 mutex_lock(&pipe->lock);
894 if (pipe->stream_count == pipe->num_video - 1) {
895 if (pipe->uds) {
896 struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
897
898 /* If a BRU is present in the pipeline before the UDS,
899 * the alpha component doesn't need to be scaled as the
900 * BRU output alpha value is fixed to 255. Otherwise we
901 * need to scale the alpha component only when available
902 * at the input RPF.
903 */
904 if (pipe->uds_input->type == VSP1_ENTITY_BRU) {
905 uds->scale_alpha = false;
906 } else {
907 struct vsp1_rwpf *rpf =
908 to_rwpf(&pipe->uds_input->subdev);
909
910 uds->scale_alpha = rpf->video.fmtinfo->alpha;
911 }
912 }
913
914 list_for_each_entry(entity, &pipe->entities, list_pipe) {
915 vsp1_entity_route_setup(entity);
916
917 ret = v4l2_subdev_call(&entity->subdev, video,
918 s_stream, 1);
919 if (ret < 0) {
920 mutex_unlock(&pipe->lock);
921 return ret;
922 }
923 }
924 }
925
926 pipe->stream_count++;
927 mutex_unlock(&pipe->lock);
928
929 spin_lock_irqsave(&pipe->irqlock, flags);
930 if (vsp1_pipeline_ready(pipe))
931 vsp1_pipeline_run(pipe);
932 spin_unlock_irqrestore(&pipe->irqlock, flags);
933
934 return 0;
935 }
936
vsp1_video_stop_streaming(struct vb2_queue * vq)937 static void vsp1_video_stop_streaming(struct vb2_queue *vq)
938 {
939 struct vsp1_video *video = vb2_get_drv_priv(vq);
940 struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
941 struct vsp1_video_buffer *buffer;
942 unsigned long flags;
943 int ret;
944
945 mutex_lock(&pipe->lock);
946 if (--pipe->stream_count == 0) {
947 /* Stop the pipeline. */
948 ret = vsp1_pipeline_stop(pipe);
949 if (ret == -ETIMEDOUT)
950 dev_err(video->vsp1->dev, "pipeline stop timeout\n");
951 }
952 mutex_unlock(&pipe->lock);
953
954 vsp1_pipeline_cleanup(pipe);
955 media_entity_pipeline_stop(&video->video.entity);
956
957 /* Remove all buffers from the IRQ queue. */
958 spin_lock_irqsave(&video->irqlock, flags);
959 list_for_each_entry(buffer, &video->irqqueue, queue)
960 vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR);
961 INIT_LIST_HEAD(&video->irqqueue);
962 spin_unlock_irqrestore(&video->irqlock, flags);
963 }
964
965 static struct vb2_ops vsp1_video_queue_qops = {
966 .queue_setup = vsp1_video_queue_setup,
967 .buf_prepare = vsp1_video_buffer_prepare,
968 .buf_queue = vsp1_video_buffer_queue,
969 .wait_prepare = vb2_ops_wait_prepare,
970 .wait_finish = vb2_ops_wait_finish,
971 .start_streaming = vsp1_video_start_streaming,
972 .stop_streaming = vsp1_video_stop_streaming,
973 };
974
975 /* -----------------------------------------------------------------------------
976 * V4L2 ioctls
977 */
978
979 static int
vsp1_video_querycap(struct file * file,void * fh,struct v4l2_capability * cap)980 vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
981 {
982 struct v4l2_fh *vfh = file->private_data;
983 struct vsp1_video *video = to_vsp1_video(vfh->vdev);
984
985 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
986 | V4L2_CAP_VIDEO_CAPTURE_MPLANE
987 | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
988
989 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
990 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE
991 | V4L2_CAP_STREAMING;
992 else
993 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE
994 | V4L2_CAP_STREAMING;
995
996 strlcpy(cap->driver, "vsp1", sizeof(cap->driver));
997 strlcpy(cap->card, video->video.name, sizeof(cap->card));
998 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
999 dev_name(video->vsp1->dev));
1000
1001 return 0;
1002 }
1003
1004 static int
vsp1_video_get_format(struct file * file,void * fh,struct v4l2_format * format)1005 vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format)
1006 {
1007 struct v4l2_fh *vfh = file->private_data;
1008 struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1009
1010 if (format->type != video->queue.type)
1011 return -EINVAL;
1012
1013 mutex_lock(&video->lock);
1014 format->fmt.pix_mp = video->format;
1015 mutex_unlock(&video->lock);
1016
1017 return 0;
1018 }
1019
1020 static int
vsp1_video_try_format(struct file * file,void * fh,struct v4l2_format * format)1021 vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format)
1022 {
1023 struct v4l2_fh *vfh = file->private_data;
1024 struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1025
1026 if (format->type != video->queue.type)
1027 return -EINVAL;
1028
1029 return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL);
1030 }
1031
1032 static int
vsp1_video_set_format(struct file * file,void * fh,struct v4l2_format * format)1033 vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format)
1034 {
1035 struct v4l2_fh *vfh = file->private_data;
1036 struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1037 const struct vsp1_format_info *info;
1038 int ret;
1039
1040 if (format->type != video->queue.type)
1041 return -EINVAL;
1042
1043 ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info);
1044 if (ret < 0)
1045 return ret;
1046
1047 mutex_lock(&video->lock);
1048
1049 if (vb2_is_busy(&video->queue)) {
1050 ret = -EBUSY;
1051 goto done;
1052 }
1053
1054 video->format = format->fmt.pix_mp;
1055 video->fmtinfo = info;
1056
1057 done:
1058 mutex_unlock(&video->lock);
1059 return ret;
1060 }
1061
1062 static int
vsp1_video_streamon(struct file * file,void * fh,enum v4l2_buf_type type)1063 vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1064 {
1065 struct v4l2_fh *vfh = file->private_data;
1066 struct vsp1_video *video = to_vsp1_video(vfh->vdev);
1067 struct vsp1_pipeline *pipe;
1068 int ret;
1069
1070 if (video->queue.owner && video->queue.owner != file->private_data)
1071 return -EBUSY;
1072
1073 video->sequence = 0;
1074
1075 /* Start streaming on the pipeline. No link touching an entity in the
1076 * pipeline can be activated or deactivated once streaming is started.
1077 *
1078 * Use the VSP1 pipeline object embedded in the first video object that
1079 * starts streaming.
1080 */
1081 pipe = video->video.entity.pipe
1082 ? to_vsp1_pipeline(&video->video.entity) : &video->pipe;
1083
1084 ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
1085 if (ret < 0)
1086 return ret;
1087
1088 /* Verify that the configured format matches the output of the connected
1089 * subdev.
1090 */
1091 ret = vsp1_video_verify_format(video);
1092 if (ret < 0)
1093 goto err_stop;
1094
1095 ret = vsp1_pipeline_init(pipe, video);
1096 if (ret < 0)
1097 goto err_stop;
1098
1099 /* Start the queue. */
1100 ret = vb2_streamon(&video->queue, type);
1101 if (ret < 0)
1102 goto err_cleanup;
1103
1104 return 0;
1105
1106 err_cleanup:
1107 vsp1_pipeline_cleanup(pipe);
1108 err_stop:
1109 media_entity_pipeline_stop(&video->video.entity);
1110 return ret;
1111 }
1112
1113 static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = {
1114 .vidioc_querycap = vsp1_video_querycap,
1115 .vidioc_g_fmt_vid_cap_mplane = vsp1_video_get_format,
1116 .vidioc_s_fmt_vid_cap_mplane = vsp1_video_set_format,
1117 .vidioc_try_fmt_vid_cap_mplane = vsp1_video_try_format,
1118 .vidioc_g_fmt_vid_out_mplane = vsp1_video_get_format,
1119 .vidioc_s_fmt_vid_out_mplane = vsp1_video_set_format,
1120 .vidioc_try_fmt_vid_out_mplane = vsp1_video_try_format,
1121 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1122 .vidioc_querybuf = vb2_ioctl_querybuf,
1123 .vidioc_qbuf = vb2_ioctl_qbuf,
1124 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1125 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1126 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1127 .vidioc_streamon = vsp1_video_streamon,
1128 .vidioc_streamoff = vb2_ioctl_streamoff,
1129 };
1130
1131 /* -----------------------------------------------------------------------------
1132 * V4L2 File Operations
1133 */
1134
vsp1_video_open(struct file * file)1135 static int vsp1_video_open(struct file *file)
1136 {
1137 struct vsp1_video *video = video_drvdata(file);
1138 struct v4l2_fh *vfh;
1139 int ret = 0;
1140
1141 vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
1142 if (vfh == NULL)
1143 return -ENOMEM;
1144
1145 v4l2_fh_init(vfh, &video->video);
1146 v4l2_fh_add(vfh);
1147
1148 file->private_data = vfh;
1149
1150 ret = vsp1_device_get(video->vsp1);
1151 if (ret < 0) {
1152 v4l2_fh_del(vfh);
1153 kfree(vfh);
1154 }
1155
1156 return ret;
1157 }
1158
vsp1_video_release(struct file * file)1159 static int vsp1_video_release(struct file *file)
1160 {
1161 struct vsp1_video *video = video_drvdata(file);
1162 struct v4l2_fh *vfh = file->private_data;
1163
1164 mutex_lock(&video->lock);
1165 if (video->queue.owner == vfh) {
1166 vb2_queue_release(&video->queue);
1167 video->queue.owner = NULL;
1168 }
1169 mutex_unlock(&video->lock);
1170
1171 vsp1_device_put(video->vsp1);
1172
1173 v4l2_fh_release(file);
1174
1175 file->private_data = NULL;
1176
1177 return 0;
1178 }
1179
1180 static struct v4l2_file_operations vsp1_video_fops = {
1181 .owner = THIS_MODULE,
1182 .unlocked_ioctl = video_ioctl2,
1183 .open = vsp1_video_open,
1184 .release = vsp1_video_release,
1185 .poll = vb2_fop_poll,
1186 .mmap = vb2_fop_mmap,
1187 };
1188
1189 /* -----------------------------------------------------------------------------
1190 * Initialization and Cleanup
1191 */
1192
vsp1_video_init(struct vsp1_video * video,struct vsp1_entity * rwpf)1193 int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf)
1194 {
1195 const char *direction;
1196 int ret;
1197
1198 switch (video->type) {
1199 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1200 direction = "output";
1201 video->pad.flags = MEDIA_PAD_FL_SINK;
1202 break;
1203
1204 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1205 direction = "input";
1206 video->pad.flags = MEDIA_PAD_FL_SOURCE;
1207 video->video.vfl_dir = VFL_DIR_TX;
1208 break;
1209
1210 default:
1211 return -EINVAL;
1212 }
1213
1214 video->rwpf = rwpf;
1215
1216 mutex_init(&video->lock);
1217 spin_lock_init(&video->irqlock);
1218 INIT_LIST_HEAD(&video->irqqueue);
1219
1220 mutex_init(&video->pipe.lock);
1221 spin_lock_init(&video->pipe.irqlock);
1222 INIT_LIST_HEAD(&video->pipe.entities);
1223 init_waitqueue_head(&video->pipe.wq);
1224 video->pipe.state = VSP1_PIPELINE_STOPPED;
1225
1226 /* Initialize the media entity... */
1227 ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
1228 if (ret < 0)
1229 return ret;
1230
1231 /* ... and the format ... */
1232 video->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT);
1233 video->format.pixelformat = video->fmtinfo->fourcc;
1234 video->format.colorspace = V4L2_COLORSPACE_SRGB;
1235 video->format.field = V4L2_FIELD_NONE;
1236 video->format.width = VSP1_VIDEO_DEF_WIDTH;
1237 video->format.height = VSP1_VIDEO_DEF_HEIGHT;
1238 video->format.num_planes = 1;
1239 video->format.plane_fmt[0].bytesperline =
1240 video->format.width * video->fmtinfo->bpp[0] / 8;
1241 video->format.plane_fmt[0].sizeimage =
1242 video->format.plane_fmt[0].bytesperline * video->format.height;
1243
1244 /* ... and the video node... */
1245 video->video.v4l2_dev = &video->vsp1->v4l2_dev;
1246 video->video.fops = &vsp1_video_fops;
1247 snprintf(video->video.name, sizeof(video->video.name), "%s %s",
1248 rwpf->subdev.name, direction);
1249 video->video.vfl_type = VFL_TYPE_GRABBER;
1250 video->video.release = video_device_release_empty;
1251 video->video.ioctl_ops = &vsp1_video_ioctl_ops;
1252
1253 video_set_drvdata(&video->video, video);
1254
1255 /* ... and the buffers queue... */
1256 video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev);
1257 if (IS_ERR(video->alloc_ctx)) {
1258 ret = PTR_ERR(video->alloc_ctx);
1259 goto error;
1260 }
1261
1262 video->queue.type = video->type;
1263 video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1264 video->queue.lock = &video->lock;
1265 video->queue.drv_priv = video;
1266 video->queue.buf_struct_size = sizeof(struct vsp1_video_buffer);
1267 video->queue.ops = &vsp1_video_queue_qops;
1268 video->queue.mem_ops = &vb2_dma_contig_memops;
1269 video->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
1270 ret = vb2_queue_init(&video->queue);
1271 if (ret < 0) {
1272 dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n");
1273 goto error;
1274 }
1275
1276 /* ... and register the video device. */
1277 video->video.queue = &video->queue;
1278 ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1);
1279 if (ret < 0) {
1280 dev_err(video->vsp1->dev, "failed to register video device\n");
1281 goto error;
1282 }
1283
1284 return 0;
1285
1286 error:
1287 vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1288 vsp1_video_cleanup(video);
1289 return ret;
1290 }
1291
vsp1_video_cleanup(struct vsp1_video * video)1292 void vsp1_video_cleanup(struct vsp1_video *video)
1293 {
1294 if (video_is_registered(&video->video))
1295 video_unregister_device(&video->video);
1296
1297 vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
1298 media_entity_cleanup(&video->video.entity);
1299 }
1300