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