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                                 (exynos_crtc->event == NULL), HZ/20))
  38                         exynos_crtc->event = NULL;
  39                 drm_crtc_vblank_off(crtc);
  40         }
  41
  42         if (exynos_crtc->ops->dpms)
  43                 exynos_crtc->ops->dpms(exynos_crtc, mode);
  44
  45         exynos_crtc->dpms = mode;
  46
  47         if (mode == DRM_MODE_DPMS_ON)
  48                 drm_crtc_vblank_on(crtc);
  49 }
  50
  51 static void exynos_drm_crtc_prepare(struct drm_crtc *crtc)
  52 {
  53         /* drm framework doesn't check NULL. */
  54 }
  55
  56 static void exynos_drm_crtc_commit(struct drm_crtc *crtc)
  57 {
  58         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  59         struct exynos_drm_plane *exynos_plane = to_exynos_plane(crtc->primary);
  60
  61         exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
  62
  63         if (exynos_crtc->ops->win_commit)
  64                 exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos);
  65
  66         if (exynos_crtc->ops->commit)
  67                 exynos_crtc->ops->commit(exynos_crtc);
  68 }
  69
  70 static bool
  71 exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc,
  72                             const struct drm_display_mode *mode,
  73                             struct drm_display_mode *adjusted_mode)
  74 {
  75         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  76
  77         if (exynos_crtc->ops->mode_fixup)
  78                 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode,
  79                                                     adjusted_mode);
  80
  81         return true;
  82 }
  83
  84 static int
  85 exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
  86                           struct drm_display_mode *adjusted_mode, int x, int y,
  87                           struct drm_framebuffer *old_fb)
  88 {
  89         struct drm_framebuffer *fb = crtc->primary->fb;
  90         unsigned int crtc_w;
  91         unsigned int crtc_h;
  92         int ret;
  93
  94         /*
  95          * copy the mode data adjusted by mode_fixup() into crtc->mode
  96          * so that hardware can be seet to proper mode.
  97          */
  98         memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
  99
 100         ret = exynos_check_plane(crtc->primary, fb);
 101         if (ret < 0)
 102                 return ret;
 103
 104         crtc_w = fb->width - x;
 105         crtc_h = fb->height - y;
 106         exynos_plane_mode_set(crtc->primary, crtc, fb, 0, 0,
 107                               crtc_w, crtc_h, x, y, crtc_w, crtc_h);
 108
 109         return 0;
 110 }
 111
 112 static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 113                                           struct drm_framebuffer *old_fb)
 114 {
 115         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 116         struct drm_framebuffer *fb = crtc->primary->fb;
 117         unsigned int crtc_w;
 118         unsigned int crtc_h;
 119         int ret;
 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         ret = exynos_check_plane(crtc->primary, fb);
 128         if (ret)
 129                 return ret;
 130
 131         crtc_w = fb->width - x;
 132         crtc_h = fb->height - y;
 133         exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
 134                             crtc_w, crtc_h, x << 16, y << 16,
 135                             crtc_w << 16, crtc_h << 16);
 136
 137         return 0;
 138 }
 139
 140 static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
 141 {
 142         struct drm_plane *plane;
 143         int ret;
 144
 145         exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 146
 147         drm_for_each_legacy_plane(plane, &crtc->dev->mode_config.plane_list) {
 148                 if (plane->crtc != crtc)
 149                         continue;
 150
 151                 ret = plane->funcs->disable_plane(plane);
 152                 if (ret)
 153                         DRM_ERROR("Failed to disable plane %d\n", ret);
 154         }
 155 }
 156
 157 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
 158         .dpms           = exynos_drm_crtc_dpms,
 159         .prepare        = exynos_drm_crtc_prepare,
 160         .commit         = exynos_drm_crtc_commit,
 161         .mode_fixup     = exynos_drm_crtc_mode_fixup,
 162         .mode_set       = exynos_drm_crtc_mode_set,
 163         .mode_set_base  = exynos_drm_crtc_mode_set_base,
 164         .disable        = exynos_drm_crtc_disable,
 165 };
 166
 167 static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
 168                                      struct drm_framebuffer *fb,
 169                                      struct drm_pending_vblank_event *event,
 170                                      uint32_t page_flip_flags)
 171 {
 172         struct drm_device *dev = crtc->dev;
 173         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 174         unsigned int crtc_w, crtc_h;
 175         int ret;
 176
 177         /* when the page flip is requested, crtc's dpms should be on */
 178         if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
 179                 DRM_ERROR("failed page flip request.\n");
 180                 return -EINVAL;
 181         }
 182
 183         if (!event)
 184                 return -EINVAL;
 185
 186         spin_lock_irq(&dev->event_lock);
 187         if (exynos_crtc->event) {
 188                 ret = -EBUSY;
 189                 goto out;
 190         }
 191
 192         ret = exynos_check_plane(crtc->primary, fb);
 193         if (ret)
 194                 goto out;
 195
 196         ret = drm_vblank_get(dev, exynos_crtc->pipe);
 197         if (ret) {
 198                 DRM_DEBUG("failed to acquire vblank counter\n");
 199                 goto out;
 200         }
 201
 202         exynos_crtc->event = event;
 203         spin_unlock_irq(&dev->event_lock);
 204
 205         /*
 206          * the pipe from user always is 0 so we can set pipe number
 207          * of current owner to event.
 208          */
 209         event->pipe = exynos_crtc->pipe;
 210
 211         crtc->primary->fb = fb;
 212         crtc_w = fb->width - crtc->x;
 213         crtc_h = fb->height - crtc->y;
 214         exynos_update_plane(crtc->primary, crtc, fb, 0, 0,
 215                             crtc_w, crtc_h, crtc->x << 16, crtc->y << 16,
 216                             crtc_w << 16, crtc_h << 16);
 217
 218         return 0;
 219
 220 out:
 221         spin_unlock_irq(&dev->event_lock);
 222         return ret;
 223 }
 224
 225 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 226 {
 227         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 228         struct exynos_drm_private *private = crtc->dev->dev_private;
 229
 230         private->crtc[exynos_crtc->pipe] = NULL;
 231
 232         drm_crtc_cleanup(crtc);
 233         kfree(exynos_crtc);
 234 }
 235
 236 static struct drm_crtc_funcs exynos_crtc_funcs = {
 237         .set_config     = drm_crtc_helper_set_config,
 238         .page_flip      = exynos_drm_crtc_page_flip,
 239         .destroy        = exynos_drm_crtc_destroy,
 240 };
 241
 242 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
 243                                         struct drm_plane *plane,
 244                                         int pipe,
 245                                         enum exynos_drm_output_type type,
 246                                         const struct exynos_drm_crtc_ops *ops,
 247                                         void *ctx)
 248 {
 249         struct exynos_drm_crtc *exynos_crtc;
 250         struct exynos_drm_private *private = drm_dev->dev_private;
 251         struct drm_crtc *crtc;
 252         int ret;
 253
 254         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 255         if (!exynos_crtc)
 256                 return ERR_PTR(-ENOMEM);
 257
 258         init_waitqueue_head(&exynos_crtc->pending_flip_queue);
 259
 260         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
 261         exynos_crtc->pipe = pipe;
 262         exynos_crtc->type = type;
 263         exynos_crtc->ops = ops;
 264         exynos_crtc->ctx = ctx;
 265
 266         crtc = &exynos_crtc->base;
 267
 268         private->crtc[pipe] = crtc;
 269
 270         ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
 271                                         &exynos_crtc_funcs);
 272         if (ret < 0)
 273                 goto err_crtc;
 274
 275         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 276
 277         return exynos_crtc;
 278
 279 err_crtc:
 280         plane->funcs->destroy(plane);
 281         kfree(exynos_crtc);
 282         return ERR_PTR(ret);
 283 }
 284
 285 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe)
 286 {
 287         struct exynos_drm_private *private = dev->dev_private;
 288         struct exynos_drm_crtc *exynos_crtc =
 289                 to_exynos_crtc(private->crtc[pipe]);
 290
 291         if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
 292                 return -EPERM;
 293
 294         if (exynos_crtc->ops->enable_vblank)
 295                 exynos_crtc->ops->enable_vblank(exynos_crtc);
 296
 297         return 0;
 298 }
 299
 300 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe)
 301 {
 302         struct exynos_drm_private *private = dev->dev_private;
 303         struct exynos_drm_crtc *exynos_crtc =
 304                 to_exynos_crtc(private->crtc[pipe]);
 305
 306         if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
 307                 return;
 308
 309         if (exynos_crtc->ops->disable_vblank)
 310                 exynos_crtc->ops->disable_vblank(exynos_crtc);
 311 }
 312
 313 void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int pipe)
 314 {
 315         struct exynos_drm_private *dev_priv = dev->dev_private;
 316         struct drm_crtc *drm_crtc = dev_priv->crtc[pipe];
 317         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc);
 318         unsigned long flags;
 319
 320         spin_lock_irqsave(&dev->event_lock, flags);
 321         if (exynos_crtc->event) {
 322
 323                 drm_send_vblank_event(dev, -1, exynos_crtc->event);
 324                 drm_vblank_put(dev, pipe);
 325                 wake_up(&exynos_crtc->pending_flip_queue);
 326
 327         }
 328
 329         exynos_crtc->event = NULL;
 330         spin_unlock_irqrestore(&dev->event_lock, flags);
 331 }
 332
 333 void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb)
 334 {
 335         struct exynos_drm_crtc *exynos_crtc;
 336         struct drm_device *dev = fb->dev;
 337         struct drm_crtc *crtc;
 338
 339         /*
 340          * make sure that overlay data are updated to real hardware
 341          * for all encoders.
 342          */
 343         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 344                 exynos_crtc = to_exynos_crtc(crtc);
 345
 346                 /*
 347                  * wait for vblank interrupt
 348                  * - this makes sure that overlay data are updated to
 349                  *      real hardware.
 350                  */
 351                 if (exynos_crtc->ops->wait_for_vblank)
 352                         exynos_crtc->ops->wait_for_vblank(exynos_crtc);
 353         }
 354 }
 355
 356 int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
 357                                         unsigned int out_type)
 358 {
 359         struct drm_crtc *crtc;
 360
 361         list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
 362                 struct exynos_drm_crtc *exynos_crtc;
 363
 364                 exynos_crtc = to_exynos_crtc(crtc);
 365                 if (exynos_crtc->type == out_type)
 366                         return exynos_crtc->pipe;
 367         }
 368
 369         return -EPERM;
 370 }
 371
 372 void exynos_drm_crtc_te_handler(struct drm_crtc *crtc)
 373 {
 374         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 375
 376         if (exynos_crtc->ops->te_handler)
 377                 exynos_crtc->ops->te_handler(exynos_crtc);
 378 }