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  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the next
  17  * paragraph) shall be included in all copies or substantial portions of the
  18  * Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  24  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  25  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  26  * OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include "drmP.h"
  30 #include "drm_crtc_helper.h"
  31
  32 #include "exynos_drm_drv.h"
  33 #include "exynos_drm_encoder.h"
  34 #include "exynos_drm_plane.h"
  35
  36 #define to_exynos_crtc(x)       container_of(x, struct exynos_drm_crtc,\
  37                                 drm_crtc)
  38
  39 enum exynos_crtc_mode {
  40         CRTC_MODE_NORMAL,       /* normal mode */
  41         CRTC_MODE_BLANK,        /* The private plane of crtc is blank */
  42 };
  43
  44 /*
  45  * Exynos specific crtc structure.
  46  *
  47  * @drm_crtc: crtc object.
  48  * @drm_plane: pointer of private plane object for this crtc
  49  * @pipe: a crtc index created at load() with a new crtc object creation
  50  *      and the crtc object would be set to private->crtc array
  51  *      to get a crtc object corresponding to this pipe from private->crtc
  52  *      array when irq interrupt occured. the reason of using this pipe is that
  53  *      drm framework doesn't support multiple irq yet.
  54  *      we can refer to the crtc to current hardware interrupt occured through
  55  *      this pipe value.
  56  * @dpms: store the crtc dpms value
  57  * @mode: store the crtc mode value
  58  */
  59 struct exynos_drm_crtc {
  60         struct drm_crtc                 drm_crtc;
  61         struct drm_plane                *plane;
  62         unsigned int                    pipe;
  63         unsigned int                    dpms;
  64         enum exynos_crtc_mode           mode;
  65 };
  66
  67 static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
  68 {
  69         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  70
  71         DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode);
  72
  73         if (exynos_crtc->dpms == mode) {
  74                 DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
  75                 return;
  76         }
  77
  78         exynos_drm_fn_encoder(crtc, &mode, exynos_drm_encoder_crtc_dpms);
  79         exynos_crtc->dpms = mode;
  80 }
  81
  82 static void exynos_drm_crtc_prepare(struct drm_crtc *crtc)
  83 {
  84         DRM_DEBUG_KMS("%s\n", __FILE__);
  85
  86         /* drm framework doesn't check NULL. */
  87 }
  88
  89 static void exynos_drm_crtc_commit(struct drm_crtc *crtc)
  90 {
  91         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  92
  93         DRM_DEBUG_KMS("%s\n", __FILE__);
  94
  95         exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
  96         exynos_plane_commit(exynos_crtc->plane);
  97         exynos_plane_dpms(exynos_crtc->plane, DRM_MODE_DPMS_ON);
  98 }
  99
 100 static bool
 101 exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc,
 102                             const struct drm_display_mode *mode,
 103                             struct drm_display_mode *adjusted_mode)
 104 {
 105         DRM_DEBUG_KMS("%s\n", __FILE__);
 106
 107         /* drm framework doesn't check NULL */
 108         return true;
 109 }
 110
 111 static int
 112 exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
 113                           struct drm_display_mode *adjusted_mode, 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_plane *plane = exynos_crtc->plane;
 118         unsigned int crtc_w;
 119         unsigned int crtc_h;
 120         int pipe = exynos_crtc->pipe;
 121         int ret;
 122
 123         DRM_DEBUG_KMS("%s\n", __FILE__);
 124
 125         /*
 126          * copy the mode data adjusted by mode_fixup() into crtc->mode
 127          * so that hardware can be seet to proper mode.
 128          */
 129         memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
 130
 131         crtc_w = crtc->fb->width - x;
 132         crtc_h = crtc->fb->height - y;
 133
 134         ret = exynos_plane_mode_set(plane, crtc, crtc->fb, 0, 0, crtc_w, crtc_h,
 135                                     x, y, crtc_w, crtc_h);
 136         if (ret)
 137                 return ret;
 138
 139         plane->crtc = crtc;
 140         plane->fb = crtc->fb;
 141
 142         exynos_drm_fn_encoder(crtc, &pipe, exynos_drm_encoder_crtc_pipe);
 143
 144         return 0;
 145 }
 146
 147 static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 148                                           struct drm_framebuffer *old_fb)
 149 {
 150         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 151         struct drm_plane *plane = exynos_crtc->plane;
 152         unsigned int crtc_w;
 153         unsigned int crtc_h;
 154         int ret;
 155
 156         DRM_DEBUG_KMS("%s\n", __FILE__);
 157
 158         /* when framebuffer changing is requested, crtc's dpms should be on */
 159         if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
 160                 DRM_ERROR("failed framebuffer changing request.\n");
 161                 return -EPERM;
 162         }
 163
 164         crtc_w = crtc->fb->width - x;
 165         crtc_h = crtc->fb->height - y;
 166
 167         ret = exynos_plane_mode_set(plane, crtc, crtc->fb, 0, 0, crtc_w, crtc_h,
 168                                     x, y, crtc_w, crtc_h);
 169         if (ret)
 170                 return ret;
 171
 172         exynos_drm_crtc_commit(crtc);
 173
 174         return 0;
 175 }
 176
 177 static void exynos_drm_crtc_load_lut(struct drm_crtc *crtc)
 178 {
 179         DRM_DEBUG_KMS("%s\n", __FILE__);
 180         /* drm framework doesn't check NULL */
 181 }
 182
 183 static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
 184 {
 185         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 186
 187         DRM_DEBUG_KMS("%s\n", __FILE__);
 188
 189         exynos_plane_dpms(exynos_crtc->plane, DRM_MODE_DPMS_OFF);
 190         exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 191 }
 192
 193 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
 194         .dpms           = exynos_drm_crtc_dpms,
 195         .prepare        = exynos_drm_crtc_prepare,
 196         .commit         = exynos_drm_crtc_commit,
 197         .mode_fixup     = exynos_drm_crtc_mode_fixup,
 198         .mode_set       = exynos_drm_crtc_mode_set,
 199         .mode_set_base  = exynos_drm_crtc_mode_set_base,
 200         .load_lut       = exynos_drm_crtc_load_lut,
 201         .disable        = exynos_drm_crtc_disable,
 202 };
 203
 204 static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
 205                                       struct drm_framebuffer *fb,
 206                                       struct drm_pending_vblank_event *event)
 207 {
 208         struct drm_device *dev = crtc->dev;
 209         struct exynos_drm_private *dev_priv = dev->dev_private;
 210         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 211         struct drm_framebuffer *old_fb = crtc->fb;
 212         int ret = -EINVAL;
 213
 214         DRM_DEBUG_KMS("%s\n", __FILE__);
 215
 216         /* when the page flip is requested, crtc's dpms should be on */
 217         if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
 218                 DRM_ERROR("failed page flip request.\n");
 219                 return -EINVAL;
 220         }
 221
 222         mutex_lock(&dev->struct_mutex);
 223
 224         if (event) {
 225                 /*
 226                  * the pipe from user always is 0 so we can set pipe number
 227                  * of current owner to event.
 228                  */
 229                 event->pipe = exynos_crtc->pipe;
 230
 231                 ret = drm_vblank_get(dev, exynos_crtc->pipe);
 232                 if (ret) {
 233                         DRM_DEBUG("failed to acquire vblank counter\n");
 234                         list_del(&event->base.link);
 235
 236                         goto out;
 237                 }
 238
 239                 list_add_tail(&event->base.link,
 240                                 &dev_priv->pageflip_event_list);
 241
 242                 crtc->fb = fb;
 243                 ret = exynos_drm_crtc_mode_set_base(crtc, crtc->x, crtc->y,
 244                                                     NULL);
 245                 if (ret) {
 246                         crtc->fb = old_fb;
 247                         drm_vblank_put(dev, exynos_crtc->pipe);
 248                         list_del(&event->base.link);
 249
 250                         goto out;
 251                 }
 252         }
 253 out:
 254         mutex_unlock(&dev->struct_mutex);
 255         return ret;
 256 }
 257
 258 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 259 {
 260         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 261         struct exynos_drm_private *private = crtc->dev->dev_private;
 262
 263         DRM_DEBUG_KMS("%s\n", __FILE__);
 264
 265         private->crtc[exynos_crtc->pipe] = NULL;
 266
 267         drm_crtc_cleanup(crtc);
 268         kfree(exynos_crtc);
 269 }
 270
 271 static int exynos_drm_crtc_set_property(struct drm_crtc *crtc,
 272                                         struct drm_property *property,
 273                                         uint64_t val)
 274 {
 275         struct drm_device *dev = crtc->dev;
 276         struct exynos_drm_private *dev_priv = dev->dev_private;
 277         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 278
 279         DRM_DEBUG_KMS("%s\n", __func__);
 280
 281         if (property == dev_priv->crtc_mode_property) {
 282                 enum exynos_crtc_mode mode = val;
 283
 284                 if (mode == exynos_crtc->mode)
 285                         return 0;
 286
 287                 exynos_crtc->mode = mode;
 288
 289                 switch (mode) {
 290                 case CRTC_MODE_NORMAL:
 291                         exynos_drm_crtc_commit(crtc);
 292                         break;
 293                 case CRTC_MODE_BLANK:
 294                         exynos_plane_dpms(exynos_crtc->plane,
 295                                           DRM_MODE_DPMS_OFF);
 296                         break;
 297                 default:
 298                         break;
 299                 }
 300
 301                 return 0;
 302         }
 303
 304         return -EINVAL;
 305 }
 306
 307 static struct drm_crtc_funcs exynos_crtc_funcs = {
 308         .set_config     = drm_crtc_helper_set_config,
 309         .page_flip      = exynos_drm_crtc_page_flip,
 310         .destroy        = exynos_drm_crtc_destroy,
 311         .set_property   = exynos_drm_crtc_set_property,
 312 };
 313
 314 static const struct drm_prop_enum_list mode_names[] = {
 315         { CRTC_MODE_NORMAL, "normal" },
 316         { CRTC_MODE_BLANK, "blank" },
 317 };
 318
 319 static void exynos_drm_crtc_attach_mode_property(struct drm_crtc *crtc)
 320 {
 321         struct drm_device *dev = crtc->dev;
 322         struct exynos_drm_private *dev_priv = dev->dev_private;
 323         struct drm_property *prop;
 324
 325         DRM_DEBUG_KMS("%s\n", __func__);
 326
 327         prop = dev_priv->crtc_mode_property;
 328         if (!prop) {
 329                 prop = drm_property_create_enum(dev, 0, "mode", mode_names,
 330                                                 ARRAY_SIZE(mode_names));
 331                 if (!prop)
 332                         return;
 333
 334                 dev_priv->crtc_mode_property = prop;
 335         }
 336
 337         drm_object_attach_property(&crtc->base, prop, 0);
 338 }
 339
 340 int exynos_drm_crtc_create(struct drm_device *dev, unsigned int nr)
 341 {
 342         struct exynos_drm_crtc *exynos_crtc;
 343         struct exynos_drm_private *private = dev->dev_private;
 344         struct drm_crtc *crtc;
 345
 346         DRM_DEBUG_KMS("%s\n", __FILE__);
 347
 348         exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
 349         if (!exynos_crtc) {
 350                 DRM_ERROR("failed to allocate exynos crtc\n");
 351                 return -ENOMEM;
 352         }
 353
 354         exynos_crtc->pipe = nr;
 355         exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
 356         exynos_crtc->plane = exynos_plane_init(dev, 1 << nr, true);
 357         if (!exynos_crtc->plane) {
 358                 kfree(exynos_crtc);
 359                 return -ENOMEM;
 360         }
 361
 362         crtc = &exynos_crtc->drm_crtc;
 363
 364         private->crtc[nr] = crtc;
 365
 366         drm_crtc_init(dev, crtc, &exynos_crtc_funcs);
 367         drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
 368
 369         exynos_drm_crtc_attach_mode_property(crtc);
 370
 371         return 0;
 372 }
 373
 374 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
 375 {
 376         struct exynos_drm_private *private = dev->dev_private;
 377         struct exynos_drm_crtc *exynos_crtc =
 378                 to_exynos_crtc(private->crtc[crtc]);
 379
 380         DRM_DEBUG_KMS("%s\n", __FILE__);
 381
 382         if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
 383                 return -EPERM;
 384
 385         exynos_drm_fn_encoder(private->crtc[crtc], &crtc,
 386                         exynos_drm_enable_vblank);
 387
 388         return 0;
 389 }
 390
 391 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
 392 {
 393         struct exynos_drm_private *private = dev->dev_private;
 394         struct exynos_drm_crtc *exynos_crtc =
 395                 to_exynos_crtc(private->crtc[crtc]);
 396
 397         DRM_DEBUG_KMS("%s\n", __FILE__);
 398
 399         if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
 400                 return;
 401
 402         exynos_drm_fn_encoder(private->crtc[crtc], &crtc,
 403                         exynos_drm_disable_vblank);
 404 }