drivers/gpu/drm/exynos/exynos_drm_encoder.c

   1 /* exynos_drm_encoder.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
  35 #define to_exynos_encoder(x)    container_of(x, struct exynos_drm_encoder,\
  36                                 drm_encoder)
  37
  38 /*
  39  * exynos specific encoder structure.
  40  *
  41  * @drm_encoder: encoder object.
  42  * @manager: specific encoder has its own manager to control a hardware
  43  *      appropriately and we can access a hardware drawing on this manager.
  44  * @dpms: store the encoder dpms value.
  45  */
  46 struct exynos_drm_encoder {
  47         struct drm_encoder              drm_encoder;
  48         struct exynos_drm_manager       *manager;
  49         int dpms;
  50 };
  51
  52 static void exynos_drm_display_power(struct drm_encoder *encoder, int mode)
  53 {
  54         struct drm_device *dev = encoder->dev;
  55         struct drm_connector *connector;
  56         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
  57
  58         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
  59                 if (connector->encoder == encoder) {
  60                         struct exynos_drm_display_ops *display_ops =
  61                                                         manager->display_ops;
  62
  63                         DRM_DEBUG_KMS("connector[%d] dpms[%d]\n",
  64                                         connector->base.id, mode);
  65                         if (display_ops && display_ops->power_on)
  66                                 display_ops->power_on(manager->dev, mode);
  67                 }
  68         }
  69 }
  70
  71 static void exynos_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
  72 {
  73         struct drm_device *dev = encoder->dev;
  74         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
  75         struct exynos_drm_manager_ops *manager_ops = manager->ops;
  76         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
  77
  78         DRM_DEBUG_KMS("%s, encoder dpms: %d\n", __FILE__, mode);
  79
  80         if (exynos_encoder->dpms == mode) {
  81                 DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
  82                 return;
  83         }
  84
  85         mutex_lock(&dev->struct_mutex);
  86
  87         switch (mode) {
  88         case DRM_MODE_DPMS_ON:
  89                 if (manager_ops && manager_ops->apply)
  90                         manager_ops->apply(manager->dev);
  91                 exynos_drm_display_power(encoder, mode);
  92                 exynos_encoder->dpms = mode;
  93                 break;
  94         case DRM_MODE_DPMS_STANDBY:
  95         case DRM_MODE_DPMS_SUSPEND:
  96         case DRM_MODE_DPMS_OFF:
  97                 exynos_drm_display_power(encoder, mode);
  98                 exynos_encoder->dpms = mode;
  99                 break;
 100         default:
 101                 DRM_ERROR("unspecified mode %d\n", mode);
 102                 break;
 103         }
 104
 105         mutex_unlock(&dev->struct_mutex);
 106 }
 107
 108 static bool
 109 exynos_drm_encoder_mode_fixup(struct drm_encoder *encoder,
 110                                const struct drm_display_mode *mode,
 111                                struct drm_display_mode *adjusted_mode)
 112 {
 113         struct drm_device *dev = encoder->dev;
 114         struct drm_connector *connector;
 115         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
 116         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 117
 118         DRM_DEBUG_KMS("%s\n", __FILE__);
 119
 120         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 121                 if (connector->encoder == encoder)
 122                         if (manager_ops && manager_ops->mode_fixup)
 123                                 manager_ops->mode_fixup(manager->dev, connector,
 124                                                         mode, adjusted_mode);
 125         }
 126
 127         return true;
 128 }
 129
 130 static void exynos_drm_encoder_mode_set(struct drm_encoder *encoder,
 131                                          struct drm_display_mode *mode,
 132                                          struct drm_display_mode *adjusted_mode)
 133 {
 134         struct drm_device *dev = encoder->dev;
 135         struct drm_connector *connector;
 136         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
 137         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 138
 139         DRM_DEBUG_KMS("%s\n", __FILE__);
 140
 141         exynos_drm_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
 142
 143         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 144                 if (connector->encoder == encoder)
 145                         if (manager_ops && manager_ops->mode_set)
 146                                 manager_ops->mode_set(manager->dev,
 147                                                         adjusted_mode);
 148         }
 149 }
 150
 151 static void exynos_drm_encoder_prepare(struct drm_encoder *encoder)
 152 {
 153         DRM_DEBUG_KMS("%s\n", __FILE__);
 154
 155         /* drm framework doesn't check NULL. */
 156 }
 157
 158 static void exynos_drm_encoder_commit(struct drm_encoder *encoder)
 159 {
 160         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
 161         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 162
 163         DRM_DEBUG_KMS("%s\n", __FILE__);
 164
 165         if (manager_ops && manager_ops->commit)
 166                 manager_ops->commit(manager->dev);
 167 }
 168
 169 static struct drm_encoder_helper_funcs exynos_encoder_helper_funcs = {
 170         .dpms           = exynos_drm_encoder_dpms,
 171         .mode_fixup     = exynos_drm_encoder_mode_fixup,
 172         .mode_set       = exynos_drm_encoder_mode_set,
 173         .prepare        = exynos_drm_encoder_prepare,
 174         .commit         = exynos_drm_encoder_commit,
 175 };
 176
 177 static void exynos_drm_encoder_destroy(struct drm_encoder *encoder)
 178 {
 179         struct exynos_drm_encoder *exynos_encoder =
 180                 to_exynos_encoder(encoder);
 181
 182         DRM_DEBUG_KMS("%s\n", __FILE__);
 183
 184         exynos_encoder->manager->pipe = -1;
 185
 186         drm_encoder_cleanup(encoder);
 187         kfree(exynos_encoder);
 188 }
 189
 190 static struct drm_encoder_funcs exynos_encoder_funcs = {
 191         .destroy = exynos_drm_encoder_destroy,
 192 };
 193
 194 static unsigned int exynos_drm_encoder_clones(struct drm_encoder *encoder)
 195 {
 196         struct drm_encoder *clone;
 197         struct drm_device *dev = encoder->dev;
 198         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
 199         struct exynos_drm_display_ops *display_ops =
 200                                 exynos_encoder->manager->display_ops;
 201         unsigned int clone_mask = 0;
 202         int cnt = 0;
 203
 204         list_for_each_entry(clone, &dev->mode_config.encoder_list, head) {
 205                 switch (display_ops->type) {
 206                 case EXYNOS_DISPLAY_TYPE_LCD:
 207                 case EXYNOS_DISPLAY_TYPE_HDMI:
 208                 case EXYNOS_DISPLAY_TYPE_VIDI:
 209                         clone_mask |= (1 << (cnt++));
 210                         break;
 211                 default:
 212                         continue;
 213                 }
 214         }
 215
 216         return clone_mask;
 217 }
 218
 219 void exynos_drm_encoder_setup(struct drm_device *dev)
 220 {
 221         struct drm_encoder *encoder;
 222
 223         DRM_DEBUG_KMS("%s\n", __FILE__);
 224
 225         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
 226                 encoder->possible_clones = exynos_drm_encoder_clones(encoder);
 227 }
 228
 229 struct drm_encoder *
 230 exynos_drm_encoder_create(struct drm_device *dev,
 231                            struct exynos_drm_manager *manager,
 232                            unsigned int possible_crtcs)
 233 {
 234         struct drm_encoder *encoder;
 235         struct exynos_drm_encoder *exynos_encoder;
 236
 237         DRM_DEBUG_KMS("%s\n", __FILE__);
 238
 239         if (!manager || !possible_crtcs)
 240                 return NULL;
 241
 242         if (!manager->dev)
 243                 return NULL;
 244
 245         exynos_encoder = kzalloc(sizeof(*exynos_encoder), GFP_KERNEL);
 246         if (!exynos_encoder) {
 247                 DRM_ERROR("failed to allocate encoder\n");
 248                 return NULL;
 249         }
 250
 251         exynos_encoder->dpms = DRM_MODE_DPMS_OFF;
 252         exynos_encoder->manager = manager;
 253         encoder = &exynos_encoder->drm_encoder;
 254         encoder->possible_crtcs = possible_crtcs;
 255
 256         DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
 257
 258         drm_encoder_init(dev, encoder, &exynos_encoder_funcs,
 259                         DRM_MODE_ENCODER_TMDS);
 260
 261         drm_encoder_helper_add(encoder, &exynos_encoder_helper_funcs);
 262
 263         DRM_DEBUG_KMS("encoder has been created\n");
 264
 265         return encoder;
 266 }
 267
 268 struct exynos_drm_manager *exynos_drm_get_manager(struct drm_encoder *encoder)
 269 {
 270         return to_exynos_encoder(encoder)->manager;
 271 }
 272
 273 void exynos_drm_fn_encoder(struct drm_crtc *crtc, void *data,
 274                             void (*fn)(struct drm_encoder *, void *))
 275 {
 276         struct drm_device *dev = crtc->dev;
 277         struct drm_encoder *encoder;
 278         struct exynos_drm_private *private = dev->dev_private;
 279         struct exynos_drm_manager *manager;
 280
 281         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 282                 /*
 283                  * if crtc is detached from encoder, check pipe,
 284                  * otherwise check crtc attached to encoder
 285                  */
 286                 if (!encoder->crtc) {
 287                         manager = to_exynos_encoder(encoder)->manager;
 288                         if (manager->pipe < 0 ||
 289                                         private->crtc[manager->pipe] != crtc)
 290                                 continue;
 291                 } else {
 292                         if (encoder->crtc != crtc)
 293                                 continue;
 294                 }
 295
 296                 fn(encoder, data);
 297         }
 298 }
 299
 300 void exynos_drm_enable_vblank(struct drm_encoder *encoder, void *data)
 301 {
 302         struct exynos_drm_manager *manager =
 303                 to_exynos_encoder(encoder)->manager;
 304         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 305         int crtc = *(int *)data;
 306
 307         if (manager->pipe != crtc)
 308                 return;
 309
 310         if (manager_ops->enable_vblank)
 311                 manager_ops->enable_vblank(manager->dev);
 312 }
 313
 314 void exynos_drm_disable_vblank(struct drm_encoder *encoder, void *data)
 315 {
 316         struct exynos_drm_manager *manager =
 317                 to_exynos_encoder(encoder)->manager;
 318         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 319         int crtc = *(int *)data;
 320
 321         if (manager->pipe != crtc)
 322                 return;
 323
 324         if (manager_ops->disable_vblank)
 325                 manager_ops->disable_vblank(manager->dev);
 326 }
 327
 328 void exynos_drm_encoder_crtc_dpms(struct drm_encoder *encoder, void *data)
 329 {
 330         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
 331         struct exynos_drm_manager *manager = exynos_encoder->manager;
 332         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 333         int mode = *(int *)data;
 334
 335         DRM_DEBUG_KMS("%s\n", __FILE__);
 336
 337         if (manager_ops && manager_ops->dpms)
 338                 manager_ops->dpms(manager->dev, mode);
 339
 340         /*
 341          * if this condition is ok then it means that the crtc is already
 342          * detached from encoder and last function for detaching is properly
 343          * done, so clear pipe from manager to prevent repeated call.
 344          */
 345         if (mode > DRM_MODE_DPMS_ON) {
 346                 if (!encoder->crtc)
 347                         manager->pipe = -1;
 348         }
 349 }
 350
 351 void exynos_drm_encoder_crtc_pipe(struct drm_encoder *encoder, void *data)
 352 {
 353         struct exynos_drm_manager *manager =
 354                 to_exynos_encoder(encoder)->manager;
 355         int pipe = *(int *)data;
 356
 357         DRM_DEBUG_KMS("%s\n", __FILE__);
 358
 359         /*
 360          * when crtc is detached from encoder, this pipe is used
 361          * to select manager operation
 362          */
 363         manager->pipe = pipe;
 364 }
 365
 366 void exynos_drm_encoder_plane_mode_set(struct drm_encoder *encoder, void *data)
 367 {
 368         struct exynos_drm_manager *manager =
 369                 to_exynos_encoder(encoder)->manager;
 370         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 371         struct exynos_drm_overlay *overlay = data;
 372
 373         DRM_DEBUG_KMS("%s\n", __FILE__);
 374
 375         if (overlay_ops && overlay_ops->mode_set)
 376                 overlay_ops->mode_set(manager->dev, overlay);
 377 }
 378
 379 void exynos_drm_encoder_plane_commit(struct drm_encoder *encoder, void *data)
 380 {
 381         struct exynos_drm_manager *manager =
 382                 to_exynos_encoder(encoder)->manager;
 383         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 384         int zpos = DEFAULT_ZPOS;
 385
 386         DRM_DEBUG_KMS("%s\n", __FILE__);
 387
 388         if (data)
 389                 zpos = *(int *)data;
 390
 391         if (overlay_ops && overlay_ops->commit)
 392                 overlay_ops->commit(manager->dev, zpos);
 393 }
 394
 395 void exynos_drm_encoder_plane_enable(struct drm_encoder *encoder, void *data)
 396 {
 397         struct exynos_drm_manager *manager =
 398                 to_exynos_encoder(encoder)->manager;
 399         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 400         int zpos = DEFAULT_ZPOS;
 401
 402         DRM_DEBUG_KMS("%s\n", __FILE__);
 403
 404         if (data)
 405                 zpos = *(int *)data;
 406
 407         if (overlay_ops && overlay_ops->enable)
 408                 overlay_ops->enable(manager->dev, zpos);
 409 }
 410
 411 void exynos_drm_encoder_plane_disable(struct drm_encoder *encoder, void *data)
 412 {
 413         struct exynos_drm_manager *manager =
 414                 to_exynos_encoder(encoder)->manager;
 415         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 416         int zpos = DEFAULT_ZPOS;
 417
 418         DRM_DEBUG_KMS("%s\n", __FILE__);
 419
 420         if (data)
 421                 zpos = *(int *)data;
 422
 423         if (overlay_ops && overlay_ops->disable)
 424                 overlay_ops->disable(manager->dev, zpos);
 425 }