drivers/gpu/drm/exynos/exynos_drm_crtc.c

   1 /* exynos_drm_crtc.c
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  * Authors:
   5  *      Inki Dae <inki.dae@samsung.com>
   6  *      Joonyoung Shim <jy0922.shim@samsung.com>
   7  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  */
  14
  15 #include <drm/drmP.h>
  16 #include <drm/drm_crtc_helper.h>
  17
  18 #include "exynos_drm_crtc.h"
  19 #include "exynos_drm_drv.h"
  20 #include "exynos_drm_encoder.h"
  21 #include "exynos_drm_plane.h"
  22
  23 static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
  24 {
  25         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  26         struct exynos_drm_manager *manager = exynos_crtc->manager;
  27
  28         DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode);
  29
  30         if (exynos_crtc->dpms == mode) {
  31                 DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
  32                 return;
  33         }
  34
  35         if (mode > DRM_MODE_DPMS_ON) {
  36                 /* wait for the completion of page flip. */
  37                 if (!wait_event_timeout(exynos_crtc->pending_flip_queue,
  38                                 !atomic_read(&exynos_crtc->pending_flip),
  39                                 HZ/20))
  40                         atomic_set(&exynos_crtc->pending_flip, 0);
  41                 drm_crtc_vblank_off(crtc);
  42         }
  43
  44         if (manager->ops->dpms)
  45                 manager->ops->dpms(manager, mode);
  46
  47         exynos_crtc->dpms = mode;
  48
  49         if (mode == DRM_MODE_DPMS_ON)
  50                 drm_crtc_vblank_on(crtc);
  51 }
  52
  53 static void exynos_drm_crtc_prepare(struct drm_crtc *crtc)
  54 {
  55         /* drm framework doesn't check NULL. */
  56 }
  57
  58 static void exynos_drm_crtc_commit(struct drm_crtc *crtc)
  59 {
  60         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  61         struct exynos_drm_manager *manager = exynos_crtc->manager;
  62         struct exynos_drm_plane *exynos_plane = to_exynos_plane(crtc->primary);
  63
  64         exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
  65
  66         if (manager->ops->win_commit)
  67                 manager->ops->win_commit(manager, exynos_plane->zpos);
  68
  69         if (manager->ops->commit)
  70                 manager->ops->commit(manager);
  71
  72         exynos_plane_dpms(crtc->primary, DRM_MODE_DPMS_ON);
  73 }
  74
  75 static bool
  76 exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc,
  77                             const struct drm_display_mode *mode,
  78                             struct drm_display_mode *adjusted_mode)
  79 {
  80         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  81         struct exynos_drm_manager *manager = exynos_crtc->manager;
  82
  83         if (manager->ops->mode_fixup)
  84                 return manager->ops->mode_fixup(manager, mode, adjusted_mode);
  85
  86         return true;
  87 }
  88
  89 static int
  90 exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
  91                           struct drm_display_mode *adjusted_mode, int x, int y,
  92                           struct drm_framebuffer *old_fb)
  93 {
  94         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  95         struct exynos_drm_manager *manager = exynos_crtc->manager;
  96         struct drm_framebuffer *fb = crtc->primary->fb;
  97         unsigned int crtc_w;
  98         unsigned int crtc_h;
  99
 100         /*
 101          * copy the mode data adjusted by mode_fixup() into crtc->mode
 102          * so that hardware can be seet to proper mode.
 103          */
 104         memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
 105
 106         crtc_w = fb->width - x;
 107         crtc_h = fb->height - y;
 108
 109         if (manager->ops->mode_set)
 110                 manager->ops->mode_set(manager, &crtc->mode);
 111
 112         return exynos_plane_mode_set(crtc->primary, crtc, fb, 0, 0,
 113                                      crtc_w, crtc_h, x, y, crtc_w, crtc_h);
 114 }
 115
 116 static int exynos_drm_crtc_mode_set_commit(struct drm_crtc *crtc, int x, int y,
 117                                           struct drm_framebuffer *old_fb)
 118 {
 119         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 120         struct drm_framebuffer *fb = crtc->primary->fb;
 121         unsigned int crtc_w;
 122         unsigned int crtc_h;
 123
 124         /* when framebuffer changing is requested, crtc's dpms should be on */
 125         if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
 126                 DRM_ERROR("failed framebuffer changing request.\n");
 127                 return -EPERM;
 128         }
 129
 130         crtc_w = fb->width - x;
 131         crtc_h = fb->height - y;
 132
 133         return exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
 134                                    crtc_w, crtc_h, x, y, crtc_w, crtc_h);
 135 }
 136
 137 static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 138                                           struct drm_framebuffer *old_fb)
 139 {
 140         return exynos_drm_crtc_mode_set_commit(crtc, x, y, old_fb);
 141 }
 142
 143 static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
 144 {
 145         struct drm_plane *plane;
 146         int ret;
 147
 148         exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 149
 150         drm_for_each_legacy_plane(plane, &crtc->dev->mode_config.plane_list) {
 151                 if (plane->crtc != crtc)
 152                         continue;
 153
 154                 ret = plane->funcs->disable_plane(plane);
 155                 if (ret)
 156                         DRM_ERROR("Failed to disable plane %d\n", ret);
 157         }
 158 }
 159
 160 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
 161         .dpms           = exynos_drm_crtc_dpms,
 162         .prepare        = exynos_drm_crtc_prepare,
 163         .commit         = exynos_drm_crtc_commit,
 164         .mode_fixup     = exynos_drm_crtc_mode_fixup,
 165         .mode_set       = exynos_drm_crtc_mode_set,
 166         .mode_set_base  = exynos_drm_crtc_mode_set_base,
 167         .disable        = exynos_drm_crtc_disable,
 168 };
 169
 170 static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
 171                                      struct drm_framebuffer *fb,
 172                                      struct drm_pending_vblank_event *event,
 173                                      uint32_t page_flip_flags)
 174 {
 175         struct drm_device *dev = crtc->dev;
 176         struct exynos_drm_private *dev_priv = dev->dev_private;
 177         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 178         struct drm_framebuffer *old_fb = crtc->primary->fb;
 179         int ret = -EINVAL;
 180
 181         /* when the page flip is requested, crtc's dpms should be on */
 182         if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
 183                 DRM_ERROR("failed page flip request.\n");
 184                 return -EINVAL;
 185         }
 186
 187         mutex_lock(&dev->struct_mutex);
 188
 189         if (event) {
 190                 /*
 191                  * the pipe from user always is 0 so we can set pipe number
 192                  * of current owner to event.
 193                  */
 194                 event->pipe = exynos_crtc->pipe;
 195
 196                 ret = drm_vblank_get(dev, exynos_crtc->pipe);
 197                 if (ret) {
 198                         DRM_DEBUG("failed to acquire vblank counter\n");
 199
 200                         goto out;
 201                 }
 202
 203                 spin_lock_irq(&dev->event_lock);
 204                 list_add_tail(&event->base.link,
 205                                 &dev_priv->pageflip_event_list);
 206                 atomic_set(&exynos_crtc->pending_flip, 1);
 207                 spin_unlock_irq(&dev->event_lock);
 208
 209                 crtc->primary->fb = fb;
 210                 ret = exynos_drm_crtc_mode_set_commit(crtc, crtc->x, crtc->y,
 211                                                     NULL);
 212                 if (ret) {
 213                         crtc->primary->fb = old_fb;
 214
 215                         spin_lock_irq(&dev->event_lock);
 216                         drm_vblank_put(dev, exynos_crtc->pipe);
 217                         list_del(&event->base.link);
 218                         atomic_set(&exynos_crtc->pending_flip, 0);
 219                         spin_unlock_irq(&dev->event_lock);
 220
 221                         goto out;
 222                 }
 223         }
 224 out:
 225         mutex_unlock(&dev->struct_mutex);
 226         return ret;
 227 }
 228
 229 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 230 {
 231         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 232         struct exynos_drm_private *private = crtc->dev->dev_private;
 233
 234         private->crtc[exynos_crtc->pipe] = NULL;
 235
 236         drm_crtc_cleanup(crtc);
 237         kfree(exynos_crtc);
 238 }
 239
 240 static int exynos_drm_crtc_set_property(struct drm_crtc *crtc,
 241                                         struct drm_property *property,
 242                                         uint64_t val)
 243 {
 244         struct drm_device *dev = crtc->dev;
 245         struct exynos_drm_private *dev_priv = dev->dev_private;
 246         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 247
 248         if (property == dev_priv->crtc_mode_property) {
 249                 enum exynos_crtc_mode mode = val;
 250
 251                 if (mode == exynos_crtc->mode)
 252                         return 0;
 253
 254                 exynos_crtc->mode = mode;
 255
 256                 switch (mode) {
 257                 case CRTC_MODE_NORMAL:
 258                         exynos_drm_crtc_commit(crtc);
 259                         break;
 260                 case CRTC_MODE_BLANK:
 261                         exynos_plane_dpms(crtc->primary, DRM_MODE_DPMS_OFF);
 262                         break;
 263                 default:
 264                         break;
 265                 }
 266
 267                 return 0;
 268         }
 269
 270         return -EINVAL;
 271 }
 272
 273 static struct drm_crtc_funcs exynos_crtc_funcs = {
 274         .set_config     = drm_crtc_helper_set_config,
 275         .page_flip      = exynos_drm_crtc_page_flip,
 276         .destroy        = exynos_drm_crtc_destroy,
 277         .set_property   = exynos_drm_crtc_set_property,
 278 };
 279
 280 static const struct drm_prop_enum_list mode_names[] = {
 281         { CRTC_MODE_NORMAL, "normal" },
 282         { CRTC_MODE_BLANK, "blank" },
 283 };
 284
 285 static void exynos_drm_crtc_attach_mode_property(struct drm_crtc *crtc)
 286 {
 287         struct drm_device *dev = crtc->dev;
 288         struct exynos_drm_private *dev_priv = dev->dev_private;
 289         struct drm_property *prop;
 290
 291         prop = dev_priv->crtc_mode_property;
 292         if (!prop) {
 293                 prop = drm_property_create_enum(dev, 0, "mode", mode_names,
 294                                                 ARRAY_SIZE(mode_names));
 295                 if (!prop)
 296                         return;
 297
 298                 dev_priv->crtc_mode_property = prop;
 299         }
 300
 301         drm_object_attach_property(&crtc->base, prop, 0);
 302 }
 303
 304 int exynos_drm_crtc_create(struct exynos_drm_manager *manager)
 305 {
 306         struct exynos_drm_crtc *exynos_crtc;
 307         struct drm_plane *plane;
 308         struct exynos_drm_private *private = manager->drm_dev->dev_private;
 309         struct drm_crtc *crtc;
 310         int ret;
 311
 312         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 313         if (!exynos_crtc)
 314                 return -ENOMEM;
 315
 316         init_waitqueue_head(&exynos_crtc->pending_flip_queue);
 317         atomic_set(&exynos_crtc->pending_flip, 0);
 318
 319         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
 320         exynos_crtc->manager = manager;
 321         exynos_crtc->pipe = manager->pipe;
 322         plane = exynos_plane_init(manager->drm_dev, 1 << manager->pipe,
 323                                   DRM_PLANE_TYPE_PRIMARY);
 324         if (IS_ERR(plane)) {
 325                 ret = PTR_ERR(plane);
 326                 goto err_plane;
 327         }
 328
 329         manager->crtc = &exynos_crtc->drm_crtc;
 330         crtc = &exynos_crtc->drm_crtc;
 331
 332         private->crtc[manager->pipe] = crtc;
 333
 334         ret = drm_crtc_init_with_planes(manager->drm_dev, crtc, plane, NULL,
 335                                         &exynos_crtc_funcs);
 336         if (ret < 0)
 337                 goto err_crtc;
 338
 339         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 340
 341         exynos_drm_crtc_attach_mode_property(crtc);
 342
 343         return 0;
 344
 345 err_crtc:
 346         plane->funcs->destroy(plane);
 347 err_plane:
 348         kfree(exynos_crtc);
 349         return ret;
 350 }
 351
 352 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe)
 353 {
 354         struct exynos_drm_private *private = dev->dev_private;
 355         struct exynos_drm_crtc *exynos_crtc =
 356                 to_exynos_crtc(private->crtc[pipe]);
 357         struct exynos_drm_manager *manager = exynos_crtc->manager;
 358
 359         if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
 360                 return -EPERM;
 361
 362         if (manager->ops->enable_vblank)
 363                 manager->ops->enable_vblank(manager);
 364
 365         return 0;
 366 }
 367
 368 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe)
 369 {
 370         struct exynos_drm_private *private = dev->dev_private;
 371         struct exynos_drm_crtc *exynos_crtc =
 372                 to_exynos_crtc(private->crtc[pipe]);
 373         struct exynos_drm_manager *manager = exynos_crtc->manager;
 374
 375         if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
 376                 return;
 377
 378         if (manager->ops->disable_vblank)
 379                 manager->ops->disable_vblank(manager);
 380 }
 381
 382 void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int pipe)
 383 {
 384         struct exynos_drm_private *dev_priv = dev->dev_private;
 385         struct drm_pending_vblank_event *e, *t;
 386         struct drm_crtc *drm_crtc = dev_priv->crtc[pipe];
 387         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc);
 388         unsigned long flags;
 389
 390         spin_lock_irqsave(&dev->event_lock, flags);
 391
 392         list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
 393                         base.link) {
 394                 /* if event's pipe isn't same as crtc then ignore it. */
 395                 if (pipe != e->pipe)
 396                         continue;
 397
 398                 list_del(&e->base.link);
 399                 drm_send_vblank_event(dev, -1, e);
 400                 drm_vblank_put(dev, pipe);
 401                 atomic_set(&exynos_crtc->pending_flip, 0);
 402                 wake_up(&exynos_crtc->pending_flip_queue);
 403         }
 404
 405         spin_unlock_irqrestore(&dev->event_lock, flags);
 406 }
 407
 408 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb)
 409 {
 410         struct exynos_drm_manager *manager;
 411         struct drm_device *dev = fb->dev;
 412         struct drm_crtc *crtc;
 413
 414         /*
 415          * make sure that overlay data are updated to real hardware
 416          * for all encoders.
 417          */
 418         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 419                 manager = to_exynos_crtc(crtc)->manager;
 420
 421                 /*
 422                  * wait for vblank interrupt
 423                  * - this makes sure that overlay data are updated to
 424                  *      real hardware.
 425                  */
 426                 if (manager->ops->wait_for_vblank)
 427                         manager->ops->wait_for_vblank(manager);
 428         }
 429 }
 430
 431 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
 432                                         unsigned int out_type)
 433 {
 434         struct drm_crtc *crtc;
 435
 436         list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
 437                 struct exynos_drm_crtc *exynos_crtc;
 438
 439                 exynos_crtc = to_exynos_crtc(crtc);
 440                 if (exynos_crtc->manager->type == out_type)
 441                         return exynos_crtc->manager->pipe;
 442         }
 443
 444         return -EPERM;
 445 }
 446
 447 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 448 {
 449         struct exynos_drm_manager *manager = to_exynos_crtc(crtc)->manager;
 450
 451         if (manager->ops->te_handler)
 452                 manager->ops->te_handler(manager);
 453 }