root/drivers/gpu/drm/omapdrm/omap_crtc.c

DEFINITIONS

1. omap_crtc_timings
2. omap_crtc_channel
3. omap_crtc_is_pending
4. omap_crtc_wait_pending
5. omap_crtc_dss_start_update
6. omap_crtc_set_enabled
7. omap_crtc_dss_enable
8. omap_crtc_dss_disable
9. omap_crtc_dss_set_timings
10. omap_crtc_dss_set_lcd_config
11. omap_crtc_dss_register_framedone
12. omap_crtc_dss_unregister_framedone
13. omap_crtc_error_irq
14. omap_crtc_vblank_irq
15. omap_crtc_framedone_irq
16. omap_crtc_flush
17. omap_crtc_manual_display_update
18. omap_crtc_write_crtc_properties
19. omap_crtc_destroy
20. omap_crtc_arm_event
21. omap_crtc_atomic_enable
22. omap_crtc_atomic_disable
23. omap_crtc_mode_valid
24. omap_crtc_mode_set_nofb
25. omap_crtc_is_manually_updated
26. omap_crtc_atomic_check
27. omap_crtc_atomic_begin
28. omap_crtc_atomic_flush
29. omap_crtc_atomic_set_property
30. omap_crtc_atomic_get_property
31. omap_crtc_reset
32. omap_crtc_duplicate_state
33. omap_crtc_pre_init
34. omap_crtc_pre_uninit
35. omap_crtc_init

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
   4  * Author: Rob Clark <rob@ti.com>
   5  */
   6 
   7 #include <linux/math64.h>
   8 
   9 #include <drm/drm_atomic.h>
  10 #include <drm/drm_atomic_helper.h>
  11 #include <drm/drm_crtc.h>
  12 #include <drm/drm_mode.h>
  13 #include <drm/drm_plane_helper.h>
  14 #include <drm/drm_vblank.h>
  15 
  16 #include "omap_drv.h"
  17 
  18 #define to_omap_crtc_state(x) container_of(x, struct omap_crtc_state, base)
  19 
  20 struct omap_crtc_state {
  21         /* Must be first. */
  22         struct drm_crtc_state base;
  23         /* Shadow values for legacy userspace support. */
  24         unsigned int rotation;
  25         unsigned int zpos;
  26         bool manually_updated;
  27 };
  28 
  29 #define to_omap_crtc(x) container_of(x, struct omap_crtc, base)
  30 
  31 struct omap_crtc {
  32         struct drm_crtc base;
  33 
  34         const char *name;
  35         struct omap_drm_pipeline *pipe;
  36         enum omap_channel channel;
  37 
  38         struct videomode vm;
  39 
  40         bool ignore_digit_sync_lost;
  41 
  42         bool enabled;
  43         bool pending;
  44         wait_queue_head_t pending_wait;
  45         struct drm_pending_vblank_event *event;
  46         struct delayed_work update_work;
  47 
  48         void (*framedone_handler)(void *);
  49         void *framedone_handler_data;
  50 };
  51 
  52 /* -----------------------------------------------------------------------------
  53  * Helper Functions
  54  */
  55 
  56 struct videomode *omap_crtc_timings(struct drm_crtc *crtc)
  57 {
  58         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
  59         return &omap_crtc->vm;
  60 }
  61 
  62 enum omap_channel omap_crtc_channel(struct drm_crtc *crtc)
  63 {
  64         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
  65         return omap_crtc->channel;
  66 }
  67 
  68 static bool omap_crtc_is_pending(struct drm_crtc *crtc)
  69 {
  70         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
  71         unsigned long flags;
  72         bool pending;
  73 
  74         spin_lock_irqsave(&crtc->dev->event_lock, flags);
  75         pending = omap_crtc->pending;
  76         spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
  77 
  78         return pending;
  79 }
  80 
  81 int omap_crtc_wait_pending(struct drm_crtc *crtc)
  82 {
  83         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
  84 
  85         /*
  86          * Timeout is set to a "sufficiently" high value, which should cover
  87          * a single frame refresh even on slower displays.
  88          */
  89         return wait_event_timeout(omap_crtc->pending_wait,
  90                                   !omap_crtc_is_pending(crtc),
  91                                   msecs_to_jiffies(250));
  92 }
  93 
  94 /* -----------------------------------------------------------------------------
  95  * DSS Manager Functions
  96  */
  97 
  98 /*
  99  * Manager-ops, callbacks from output when they need to configure
 100  * the upstream part of the video pipe.
 101  */
 102 
 103 static void omap_crtc_dss_start_update(struct omap_drm_private *priv,
 104                                        enum omap_channel channel)
 105 {
 106         priv->dispc_ops->mgr_enable(priv->dispc, channel, true);
 107 }
 108 
 109 /* Called only from the encoder enable/disable and suspend/resume handlers. */
 110 static void omap_crtc_set_enabled(struct drm_crtc *crtc, bool enable)
 111 {
 112         struct omap_crtc_state *omap_state = to_omap_crtc_state(crtc->state);
 113         struct drm_device *dev = crtc->dev;
 114         struct omap_drm_private *priv = dev->dev_private;
 115         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 116         enum omap_channel channel = omap_crtc->channel;
 117         struct omap_irq_wait *wait;
 118         u32 framedone_irq, vsync_irq;
 119         int ret;
 120 
 121         if (WARN_ON(omap_crtc->enabled == enable))
 122                 return;
 123 
 124         if (omap_state->manually_updated) {
 125                 omap_irq_enable_framedone(crtc, enable);
 126                 omap_crtc->enabled = enable;
 127                 return;
 128         }
 129 
 130         if (omap_crtc->pipe->output->type == OMAP_DISPLAY_TYPE_HDMI) {
 131                 priv->dispc_ops->mgr_enable(priv->dispc, channel, enable);
 132                 omap_crtc->enabled = enable;
 133                 return;
 134         }
 135 
 136         if (omap_crtc->channel == OMAP_DSS_CHANNEL_DIGIT) {
 137                 /*
 138                  * Digit output produces some sync lost interrupts during the
 139                  * first frame when enabling, so we need to ignore those.
 140                  */
 141                 omap_crtc->ignore_digit_sync_lost = true;
 142         }
 143 
 144         framedone_irq = priv->dispc_ops->mgr_get_framedone_irq(priv->dispc,
 145                                                                channel);
 146         vsync_irq = priv->dispc_ops->mgr_get_vsync_irq(priv->dispc, channel);
 147 
 148         if (enable) {
 149                 wait = omap_irq_wait_init(dev, vsync_irq, 1);
 150         } else {
 151                 /*
 152                  * When we disable the digit output, we need to wait for
 153                  * FRAMEDONE to know that DISPC has finished with the output.
 154                  *
 155                  * OMAP2/3 does not have FRAMEDONE irq for digit output, and in
 156                  * that case we need to use vsync interrupt, and wait for both
 157                  * even and odd frames.
 158                  */
 159 
 160                 if (framedone_irq)
 161                         wait = omap_irq_wait_init(dev, framedone_irq, 1);
 162                 else
 163                         wait = omap_irq_wait_init(dev, vsync_irq, 2);
 164         }
 165 
 166         priv->dispc_ops->mgr_enable(priv->dispc, channel, enable);
 167         omap_crtc->enabled = enable;
 168 
 169         ret = omap_irq_wait(dev, wait, msecs_to_jiffies(100));
 170         if (ret) {
 171                 dev_err(dev->dev, "%s: timeout waiting for %s\n",
 172                                 omap_crtc->name, enable ? "enable" : "disable");
 173         }
 174 
 175         if (omap_crtc->channel == OMAP_DSS_CHANNEL_DIGIT) {
 176                 omap_crtc->ignore_digit_sync_lost = false;
 177                 /* make sure the irq handler sees the value above */
 178                 mb();
 179         }
 180 }
 181 
 182 
 183 static int omap_crtc_dss_enable(struct omap_drm_private *priv,
 184                                 enum omap_channel channel)
 185 {
 186         struct drm_crtc *crtc = priv->channels[channel]->crtc;
 187         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 188 
 189         priv->dispc_ops->mgr_set_timings(priv->dispc, omap_crtc->channel,
 190                                          &omap_crtc->vm);
 191         omap_crtc_set_enabled(&omap_crtc->base, true);
 192 
 193         return 0;
 194 }
 195 
 196 static void omap_crtc_dss_disable(struct omap_drm_private *priv,
 197                                   enum omap_channel channel)
 198 {
 199         struct drm_crtc *crtc = priv->channels[channel]->crtc;
 200         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 201 
 202         omap_crtc_set_enabled(&omap_crtc->base, false);
 203 }
 204 
 205 static void omap_crtc_dss_set_timings(struct omap_drm_private *priv,
 206                 enum omap_channel channel,
 207                 const struct videomode *vm)
 208 {
 209         struct drm_crtc *crtc = priv->channels[channel]->crtc;
 210         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 211 
 212         DBG("%s", omap_crtc->name);
 213         omap_crtc->vm = *vm;
 214 }
 215 
 216 static void omap_crtc_dss_set_lcd_config(struct omap_drm_private *priv,
 217                 enum omap_channel channel,
 218                 const struct dss_lcd_mgr_config *config)
 219 {
 220         struct drm_crtc *crtc = priv->channels[channel]->crtc;
 221         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 222 
 223         DBG("%s", omap_crtc->name);
 224         priv->dispc_ops->mgr_set_lcd_config(priv->dispc, omap_crtc->channel,
 225                                             config);
 226 }
 227 
 228 static int omap_crtc_dss_register_framedone(
 229                 struct omap_drm_private *priv, enum omap_channel channel,
 230                 void (*handler)(void *), void *data)
 231 {
 232         struct drm_crtc *crtc = priv->channels[channel]->crtc;
 233         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 234         struct drm_device *dev = omap_crtc->base.dev;
 235 
 236         if (omap_crtc->framedone_handler)
 237                 return -EBUSY;
 238 
 239         dev_dbg(dev->dev, "register framedone %s", omap_crtc->name);
 240 
 241         omap_crtc->framedone_handler = handler;
 242         omap_crtc->framedone_handler_data = data;
 243 
 244         return 0;
 245 }
 246 
 247 static void omap_crtc_dss_unregister_framedone(
 248                 struct omap_drm_private *priv, enum omap_channel channel,
 249                 void (*handler)(void *), void *data)
 250 {
 251         struct drm_crtc *crtc = priv->channels[channel]->crtc;
 252         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 253         struct drm_device *dev = omap_crtc->base.dev;
 254 
 255         dev_dbg(dev->dev, "unregister framedone %s", omap_crtc->name);
 256 
 257         WARN_ON(omap_crtc->framedone_handler != handler);
 258         WARN_ON(omap_crtc->framedone_handler_data != data);
 259 
 260         omap_crtc->framedone_handler = NULL;
 261         omap_crtc->framedone_handler_data = NULL;
 262 }
 263 
 264 static const struct dss_mgr_ops mgr_ops = {
 265         .start_update = omap_crtc_dss_start_update,
 266         .enable = omap_crtc_dss_enable,
 267         .disable = omap_crtc_dss_disable,
 268         .set_timings = omap_crtc_dss_set_timings,
 269         .set_lcd_config = omap_crtc_dss_set_lcd_config,
 270         .register_framedone_handler = omap_crtc_dss_register_framedone,
 271         .unregister_framedone_handler = omap_crtc_dss_unregister_framedone,
 272 };
 273 
 274 /* -----------------------------------------------------------------------------
 275  * Setup, Flush and Page Flip
 276  */
 277 
 278 void omap_crtc_error_irq(struct drm_crtc *crtc, u32 irqstatus)
 279 {
 280         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 281 
 282         if (omap_crtc->ignore_digit_sync_lost) {
 283                 irqstatus &= ~DISPC_IRQ_SYNC_LOST_DIGIT;
 284                 if (!irqstatus)
 285                         return;
 286         }
 287 
 288         DRM_ERROR_RATELIMITED("%s: errors: %08x\n", omap_crtc->name, irqstatus);
 289 }
 290 
 291 void omap_crtc_vblank_irq(struct drm_crtc *crtc)
 292 {
 293         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 294         struct drm_device *dev = omap_crtc->base.dev;
 295         struct omap_drm_private *priv = dev->dev_private;
 296         bool pending;
 297 
 298         spin_lock(&crtc->dev->event_lock);
 299         /*
 300          * If the dispc is busy we're racing the flush operation. Try again on
 301          * the next vblank interrupt.
 302          */
 303         if (priv->dispc_ops->mgr_go_busy(priv->dispc, omap_crtc->channel)) {
 304                 spin_unlock(&crtc->dev->event_lock);
 305                 return;
 306         }
 307 
 308         /* Send the vblank event if one has been requested. */
 309         if (omap_crtc->event) {
 310                 drm_crtc_send_vblank_event(crtc, omap_crtc->event);
 311                 omap_crtc->event = NULL;
 312         }
 313 
 314         pending = omap_crtc->pending;
 315         omap_crtc->pending = false;
 316         spin_unlock(&crtc->dev->event_lock);
 317 
 318         if (pending)
 319                 drm_crtc_vblank_put(crtc);
 320 
 321         /* Wake up omap_atomic_complete. */
 322         wake_up(&omap_crtc->pending_wait);
 323 
 324         DBG("%s: apply done", omap_crtc->name);
 325 }
 326 
 327 void omap_crtc_framedone_irq(struct drm_crtc *crtc, uint32_t irqstatus)
 328 {
 329         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 330 
 331         if (!omap_crtc->framedone_handler)
 332                 return;
 333 
 334         omap_crtc->framedone_handler(omap_crtc->framedone_handler_data);
 335 
 336         spin_lock(&crtc->dev->event_lock);
 337         /* Send the vblank event if one has been requested. */
 338         if (omap_crtc->event) {
 339                 drm_crtc_send_vblank_event(crtc, omap_crtc->event);
 340                 omap_crtc->event = NULL;
 341         }
 342         omap_crtc->pending = false;
 343         spin_unlock(&crtc->dev->event_lock);
 344 
 345         /* Wake up omap_atomic_complete. */
 346         wake_up(&omap_crtc->pending_wait);
 347 }
 348 
 349 void omap_crtc_flush(struct drm_crtc *crtc)
 350 {
 351         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 352         struct omap_crtc_state *omap_state = to_omap_crtc_state(crtc->state);
 353 
 354         if (!omap_state->manually_updated)
 355                 return;
 356 
 357         if (!delayed_work_pending(&omap_crtc->update_work))
 358                 schedule_delayed_work(&omap_crtc->update_work, 0);
 359 }
 360 
 361 static void omap_crtc_manual_display_update(struct work_struct *data)
 362 {
 363         struct omap_crtc *omap_crtc =
 364                         container_of(data, struct omap_crtc, update_work.work);
 365         struct drm_display_mode *mode = &omap_crtc->pipe->crtc->mode;
 366         struct omap_dss_device *dssdev = omap_crtc->pipe->output->next;
 367         struct drm_device *dev = omap_crtc->base.dev;
 368         const struct omap_dss_driver *dssdrv;
 369         int ret;
 370 
 371         if (!dssdev) {
 372                 dev_err_once(dev->dev, "missing display dssdev!");
 373                 return;
 374         }
 375 
 376         dssdrv = dssdev->driver;
 377         if (!dssdrv || !dssdrv->update) {
 378                 dev_err_once(dev->dev, "missing or incorrect dssdrv!");
 379                 return;
 380         }
 381 
 382         if (dssdrv->sync)
 383                 dssdrv->sync(dssdev);
 384 
 385         ret = dssdrv->update(dssdev, 0, 0, mode->hdisplay, mode->vdisplay);
 386         if (ret < 0) {
 387                 spin_lock_irq(&dev->event_lock);
 388                 omap_crtc->pending = false;
 389                 spin_unlock_irq(&dev->event_lock);
 390                 wake_up(&omap_crtc->pending_wait);
 391         }
 392 }
 393 
 394 static void omap_crtc_write_crtc_properties(struct drm_crtc *crtc)
 395 {
 396         struct omap_drm_private *priv = crtc->dev->dev_private;
 397         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 398         struct omap_overlay_manager_info info;
 399 
 400         memset(&info, 0, sizeof(info));
 401 
 402         info.default_color = 0x000000;
 403         info.trans_enabled = false;
 404         info.partial_alpha_enabled = false;
 405         info.cpr_enable = false;
 406 
 407         priv->dispc_ops->mgr_setup(priv->dispc, omap_crtc->channel, &info);
 408 }
 409 
 410 /* -----------------------------------------------------------------------------
 411  * CRTC Functions
 412  */
 413 
 414 static void omap_crtc_destroy(struct drm_crtc *crtc)
 415 {
 416         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 417 
 418         DBG("%s", omap_crtc->name);
 419 
 420         drm_crtc_cleanup(crtc);
 421 
 422         kfree(omap_crtc);
 423 }
 424 
 425 static void omap_crtc_arm_event(struct drm_crtc *crtc)
 426 {
 427         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 428 
 429         WARN_ON(omap_crtc->pending);
 430         omap_crtc->pending = true;
 431 
 432         if (crtc->state->event) {
 433                 omap_crtc->event = crtc->state->event;
 434                 crtc->state->event = NULL;
 435         }
 436 }
 437 
 438 static void omap_crtc_atomic_enable(struct drm_crtc *crtc,
 439                                     struct drm_crtc_state *old_state)
 440 {
 441         struct omap_drm_private *priv = crtc->dev->dev_private;
 442         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 443         struct omap_crtc_state *omap_state = to_omap_crtc_state(crtc->state);
 444         int ret;
 445 
 446         DBG("%s", omap_crtc->name);
 447 
 448         priv->dispc_ops->runtime_get(priv->dispc);
 449 
 450         /* manual updated display will not trigger vsync irq */
 451         if (omap_state->manually_updated)
 452                 return;
 453 
 454         spin_lock_irq(&crtc->dev->event_lock);
 455         drm_crtc_vblank_on(crtc);
 456         ret = drm_crtc_vblank_get(crtc);
 457         WARN_ON(ret != 0);
 458 
 459         omap_crtc_arm_event(crtc);
 460         spin_unlock_irq(&crtc->dev->event_lock);
 461 }
 462 
 463 static void omap_crtc_atomic_disable(struct drm_crtc *crtc,
 464                                      struct drm_crtc_state *old_state)
 465 {
 466         struct omap_drm_private *priv = crtc->dev->dev_private;
 467         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 468         struct drm_device *dev = crtc->dev;
 469 
 470         DBG("%s", omap_crtc->name);
 471 
 472         spin_lock_irq(&crtc->dev->event_lock);
 473         if (crtc->state->event) {
 474                 drm_crtc_send_vblank_event(crtc, crtc->state->event);
 475                 crtc->state->event = NULL;
 476         }
 477         spin_unlock_irq(&crtc->dev->event_lock);
 478 
 479         cancel_delayed_work(&omap_crtc->update_work);
 480 
 481         if (!omap_crtc_wait_pending(crtc))
 482                 dev_warn(dev->dev, "manual display update did not finish!");
 483 
 484         drm_crtc_vblank_off(crtc);
 485 
 486         priv->dispc_ops->runtime_put(priv->dispc);
 487 }
 488 
 489 static enum drm_mode_status omap_crtc_mode_valid(struct drm_crtc *crtc,
 490                                         const struct drm_display_mode *mode)
 491 {
 492         struct omap_drm_private *priv = crtc->dev->dev_private;
 493         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 494         struct videomode vm = {0};
 495         int r;
 496 
 497         drm_display_mode_to_videomode(mode, &vm);
 498 
 499         /*
 500          * DSI might not call this, since the supplied mode is not a
 501          * valid DISPC mode. DSI will calculate and configure the
 502          * proper DISPC mode later.
 503          */
 504         if (omap_crtc->pipe->output->next == NULL ||
 505             omap_crtc->pipe->output->next->type != OMAP_DISPLAY_TYPE_DSI) {
 506                 r = priv->dispc_ops->mgr_check_timings(priv->dispc,
 507                                                        omap_crtc->channel,
 508                                                        &vm);
 509                 if (r)
 510                         return r;
 511         }
 512 
 513         /* Check for bandwidth limit */
 514         if (priv->max_bandwidth) {
 515                 /*
 516                  * Estimation for the bandwidth need of a given mode with one
 517                  * full screen plane:
 518                  * bandwidth = resolution * 32bpp * (pclk / (vtotal * htotal))
 519                  *                                      ^^ Refresh rate ^^
 520                  *
 521                  * The interlaced mode is taken into account by using the
 522                  * pixelclock in the calculation.
 523                  *
 524                  * The equation is rearranged for 64bit arithmetic.
 525                  */
 526                 uint64_t bandwidth = mode->clock * 1000;
 527                 unsigned int bpp = 4;
 528 
 529                 bandwidth = bandwidth * mode->hdisplay * mode->vdisplay * bpp;
 530                 bandwidth = div_u64(bandwidth, mode->htotal * mode->vtotal);
 531 
 532                 /*
 533                  * Reject modes which would need more bandwidth if used with one
 534                  * full resolution plane (most common use case).
 535                  */
 536                 if (priv->max_bandwidth < bandwidth)
 537                         return MODE_BAD;
 538         }
 539 
 540         return MODE_OK;
 541 }
 542 
 543 static void omap_crtc_mode_set_nofb(struct drm_crtc *crtc)
 544 {
 545         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 546         struct drm_display_mode *mode = &crtc->state->adjusted_mode;
 547 
 548         DBG("%s: set mode: " DRM_MODE_FMT,
 549             omap_crtc->name, DRM_MODE_ARG(mode));
 550 
 551         drm_display_mode_to_videomode(mode, &omap_crtc->vm);
 552 }
 553 
 554 static bool omap_crtc_is_manually_updated(struct drm_crtc *crtc)
 555 {
 556         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 557         struct omap_dss_device *display = omap_crtc->pipe->output->next;
 558 
 559         if (!display)
 560                 return false;
 561 
 562         if (display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
 563                 DBG("detected manually updated display!");
 564                 return true;
 565         }
 566 
 567         return false;
 568 }
 569 
 570 static int omap_crtc_atomic_check(struct drm_crtc *crtc,
 571                                 struct drm_crtc_state *state)
 572 {
 573         struct drm_plane_state *pri_state;
 574 
 575         if (state->color_mgmt_changed && state->gamma_lut) {
 576                 unsigned int length = state->gamma_lut->length /
 577                         sizeof(struct drm_color_lut);
 578 
 579                 if (length < 2)
 580                         return -EINVAL;
 581         }
 582 
 583         pri_state = drm_atomic_get_new_plane_state(state->state, crtc->primary);
 584         if (pri_state) {
 585                 struct omap_crtc_state *omap_crtc_state =
 586                         to_omap_crtc_state(state);
 587 
 588                 /* Mirror new values for zpos and rotation in omap_crtc_state */
 589                 omap_crtc_state->zpos = pri_state->zpos;
 590                 omap_crtc_state->rotation = pri_state->rotation;
 591 
 592                 /* Check if this CRTC is for a manually updated display */
 593                 omap_crtc_state->manually_updated = omap_crtc_is_manually_updated(crtc);
 594         }
 595 
 596         return 0;
 597 }
 598 
 599 static void omap_crtc_atomic_begin(struct drm_crtc *crtc,
 600                                    struct drm_crtc_state *old_crtc_state)
 601 {
 602 }
 603 
 604 static void omap_crtc_atomic_flush(struct drm_crtc *crtc,
 605                                    struct drm_crtc_state *old_crtc_state)
 606 {
 607         struct omap_drm_private *priv = crtc->dev->dev_private;
 608         struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 609         struct omap_crtc_state *omap_crtc_state = to_omap_crtc_state(crtc->state);
 610         int ret;
 611 
 612         if (crtc->state->color_mgmt_changed) {
 613                 struct drm_color_lut *lut = NULL;
 614                 unsigned int length = 0;
 615 
 616                 if (crtc->state->gamma_lut) {
 617                         lut = (struct drm_color_lut *)
 618                                 crtc->state->gamma_lut->data;
 619                         length = crtc->state->gamma_lut->length /
 620                                 sizeof(*lut);
 621                 }
 622                 priv->dispc_ops->mgr_set_gamma(priv->dispc, omap_crtc->channel,
 623                                                lut, length);
 624         }
 625 
 626         omap_crtc_write_crtc_properties(crtc);
 627 
 628         /* Only flush the CRTC if it is currently enabled. */
 629         if (!omap_crtc->enabled)
 630                 return;
 631 
 632         DBG("%s: GO", omap_crtc->name);
 633 
 634         if (omap_crtc_state->manually_updated) {
 635                 /* send new image for page flips and modeset changes */
 636                 spin_lock_irq(&crtc->dev->event_lock);
 637                 omap_crtc_flush(crtc);
 638                 omap_crtc_arm_event(crtc);
 639                 spin_unlock_irq(&crtc->dev->event_lock);
 640                 return;
 641         }
 642 
 643         ret = drm_crtc_vblank_get(crtc);
 644         WARN_ON(ret != 0);
 645 
 646         spin_lock_irq(&crtc->dev->event_lock);
 647         priv->dispc_ops->mgr_go(priv->dispc, omap_crtc->channel);
 648         omap_crtc_arm_event(crtc);
 649         spin_unlock_irq(&crtc->dev->event_lock);
 650 }
 651 
 652 static int omap_crtc_atomic_set_property(struct drm_crtc *crtc,
 653                                          struct drm_crtc_state *state,
 654                                          struct drm_property *property,
 655                                          u64 val)
 656 {
 657         struct omap_drm_private *priv = crtc->dev->dev_private;
 658         struct drm_plane_state *plane_state;
 659 
 660         /*
 661          * Delegate property set to the primary plane. Get the plane state and
 662          * set the property directly, the shadow copy will be assigned in the
 663          * omap_crtc_atomic_check callback. This way updates to plane state will
 664          * always be mirrored in the crtc state correctly.
 665          */
 666         plane_state = drm_atomic_get_plane_state(state->state, crtc->primary);
 667         if (IS_ERR(plane_state))
 668                 return PTR_ERR(plane_state);
 669 
 670         if (property == crtc->primary->rotation_property)
 671                 plane_state->rotation = val;
 672         else if (property == priv->zorder_prop)
 673                 plane_state->zpos = val;
 674         else
 675                 return -EINVAL;
 676 
 677         return 0;
 678 }
 679 
 680 static int omap_crtc_atomic_get_property(struct drm_crtc *crtc,
 681                                          const struct drm_crtc_state *state,
 682                                          struct drm_property *property,
 683                                          u64 *val)
 684 {
 685         struct omap_drm_private *priv = crtc->dev->dev_private;
 686         struct omap_crtc_state *omap_state = to_omap_crtc_state(state);
 687 
 688         if (property == crtc->primary->rotation_property)
 689                 *val = omap_state->rotation;
 690         else if (property == priv->zorder_prop)
 691                 *val = omap_state->zpos;
 692         else
 693                 return -EINVAL;
 694 
 695         return 0;
 696 }
 697 
 698 static void omap_crtc_reset(struct drm_crtc *crtc)
 699 {
 700         if (crtc->state)
 701                 __drm_atomic_helper_crtc_destroy_state(crtc->state);
 702 
 703         kfree(crtc->state);
 704         crtc->state = kzalloc(sizeof(struct omap_crtc_state), GFP_KERNEL);
 705 
 706         if (crtc->state)
 707                 crtc->state->crtc = crtc;
 708 }
 709 
 710 static struct drm_crtc_state *
 711 omap_crtc_duplicate_state(struct drm_crtc *crtc)
 712 {
 713         struct omap_crtc_state *state, *current_state;
 714 
 715         if (WARN_ON(!crtc->state))
 716                 return NULL;
 717 
 718         current_state = to_omap_crtc_state(crtc->state);
 719 
 720         state = kmalloc(sizeof(*state), GFP_KERNEL);
 721         if (!state)
 722                 return NULL;
 723 
 724         __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
 725 
 726         state->zpos = current_state->zpos;
 727         state->rotation = current_state->rotation;
 728         state->manually_updated = current_state->manually_updated;
 729 
 730         return &state->base;
 731 }
 732 
 733 static const struct drm_crtc_funcs omap_crtc_funcs = {
 734         .reset = omap_crtc_reset,
 735         .set_config = drm_atomic_helper_set_config,
 736         .destroy = omap_crtc_destroy,
 737         .page_flip = drm_atomic_helper_page_flip,
 738         .gamma_set = drm_atomic_helper_legacy_gamma_set,
 739         .atomic_duplicate_state = omap_crtc_duplicate_state,
 740         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 741         .atomic_set_property = omap_crtc_atomic_set_property,
 742         .atomic_get_property = omap_crtc_atomic_get_property,
 743         .enable_vblank = omap_irq_enable_vblank,
 744         .disable_vblank = omap_irq_disable_vblank,
 745 };
 746 
 747 static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs = {
 748         .mode_set_nofb = omap_crtc_mode_set_nofb,
 749         .atomic_check = omap_crtc_atomic_check,
 750         .atomic_begin = omap_crtc_atomic_begin,
 751         .atomic_flush = omap_crtc_atomic_flush,
 752         .atomic_enable = omap_crtc_atomic_enable,
 753         .atomic_disable = omap_crtc_atomic_disable,
 754         .mode_valid = omap_crtc_mode_valid,
 755 };
 756 
 757 /* -----------------------------------------------------------------------------
 758  * Init and Cleanup
 759  */
 760 
 761 static const char *channel_names[] = {
 762         [OMAP_DSS_CHANNEL_LCD] = "lcd",
 763         [OMAP_DSS_CHANNEL_DIGIT] = "tv",
 764         [OMAP_DSS_CHANNEL_LCD2] = "lcd2",
 765         [OMAP_DSS_CHANNEL_LCD3] = "lcd3",
 766 };
 767 
 768 void omap_crtc_pre_init(struct omap_drm_private *priv)
 769 {
 770         dss_install_mgr_ops(priv->dss, &mgr_ops, priv);
 771 }
 772 
 773 void omap_crtc_pre_uninit(struct omap_drm_private *priv)
 774 {
 775         dss_uninstall_mgr_ops(priv->dss);
 776 }
 777 
 778 /* initialize crtc */
 779 struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 780                                 struct omap_drm_pipeline *pipe,
 781                                 struct drm_plane *plane)
 782 {
 783         struct omap_drm_private *priv = dev->dev_private;
 784         struct drm_crtc *crtc = NULL;
 785         struct omap_crtc *omap_crtc;
 786         enum omap_channel channel;
 787         int ret;
 788 
 789         channel = pipe->output->dispc_channel;
 790 
 791         DBG("%s", channel_names[channel]);
 792 
 793         omap_crtc = kzalloc(sizeof(*omap_crtc), GFP_KERNEL);
 794         if (!omap_crtc)
 795                 return ERR_PTR(-ENOMEM);
 796 
 797         crtc = &omap_crtc->base;
 798 
 799         init_waitqueue_head(&omap_crtc->pending_wait);
 800 
 801         omap_crtc->pipe = pipe;
 802         omap_crtc->channel = channel;
 803         omap_crtc->name = channel_names[channel];
 804 
 805         /*
 806          * We want to refresh manually updated displays from dirty callback,
 807          * which is called quite often (e.g. for each drawn line). This will
 808          * be used to do the display update asynchronously to avoid blocking
 809          * the rendering process and merges multiple dirty calls into one
 810          * update if they arrive very fast. We also call this function for
 811          * atomic display updates (e.g. for page flips), which means we do
 812          * not need extra locking. Atomic updates should be synchronous, but
 813          * need to wait for the framedone interrupt anyways.
 814          */
 815         INIT_DELAYED_WORK(&omap_crtc->update_work,
 816                           omap_crtc_manual_display_update);
 817 
 818         ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL,
 819                                         &omap_crtc_funcs, NULL);
 820         if (ret < 0) {
 821                 dev_err(dev->dev, "%s(): could not init crtc for: %s\n",
 822                         __func__, pipe->output->name);
 823                 kfree(omap_crtc);
 824                 return ERR_PTR(ret);
 825         }
 826 
 827         drm_crtc_helper_add(crtc, &omap_crtc_helper_funcs);
 828 
 829         /* The dispc API adapts to what ever size, but the HW supports
 830          * 256 element gamma table for LCDs and 1024 element table for
 831          * OMAP_DSS_CHANNEL_DIGIT. X server assumes 256 element gamma
 832          * tables so lets use that. Size of HW gamma table can be
 833          * extracted with dispc_mgr_gamma_size(). If it returns 0
 834          * gamma table is not supprted.
 835          */
 836         if (priv->dispc_ops->mgr_gamma_size(priv->dispc, channel)) {
 837                 unsigned int gamma_lut_size = 256;
 838 
 839                 drm_crtc_enable_color_mgmt(crtc, 0, false, gamma_lut_size);
 840                 drm_mode_crtc_set_gamma_size(crtc, gamma_lut_size);
 841         }
 842 
 843         omap_plane_install_properties(crtc->primary, &crtc->base);
 844 
 845         return crtc;
 846 }