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  * 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_drv.h"
  19 #include "exynos_drm_encoder.h"
  20 #include "exynos_drm_connector.h"
  21
  22 #define to_exynos_encoder(x)    container_of(x, struct exynos_drm_encoder,\
  23                                 drm_encoder)
  24
  25 /*
  26  * exynos specific encoder structure.
  27  *
  28  * @drm_encoder: encoder object.
  29  * @manager: specific encoder has its own manager to control a hardware
  30  *      appropriately and we can access a hardware drawing on this manager.
  31  * @dpms: store the encoder dpms value.
  32  * @updated: indicate whether overlay data updating is needed or not.
  33  */
  34 struct exynos_drm_encoder {
  35         struct drm_crtc                 *old_crtc;
  36         struct drm_encoder              drm_encoder;
  37         struct exynos_drm_manager       *manager;
  38         int                             dpms;
  39         bool                            updated;
  40 };
  41
  42 static void exynos_drm_connector_power(struct drm_encoder *encoder, int mode)
  43 {
  44         struct drm_device *dev = encoder->dev;
  45         struct drm_connector *connector;
  46
  47         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
  48                 if (exynos_drm_best_encoder(connector) == encoder) {
  49                         DRM_DEBUG_KMS("connector[%d] dpms[%d]\n",
  50                                         connector->base.id, mode);
  51
  52                         exynos_drm_display_power(connector, mode);
  53                 }
  54         }
  55 }
  56
  57 static void exynos_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
  58 {
  59         struct drm_device *dev = encoder->dev;
  60         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
  61         struct exynos_drm_manager_ops *manager_ops = manager->ops;
  62         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
  63
  64         DRM_DEBUG_KMS("%s, encoder dpms: %d\n", __FILE__, mode);
  65
  66         if (exynos_encoder->dpms == mode) {
  67                 DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
  68                 return;
  69         }
  70
  71         mutex_lock(&dev->struct_mutex);
  72
  73         switch (mode) {
  74         case DRM_MODE_DPMS_ON:
  75                 if (manager_ops && manager_ops->apply)
  76                         if (!exynos_encoder->updated)
  77                                 manager_ops->apply(manager->dev);
  78
  79                 exynos_drm_connector_power(encoder, mode);
  80                 exynos_encoder->dpms = mode;
  81                 break;
  82         case DRM_MODE_DPMS_STANDBY:
  83         case DRM_MODE_DPMS_SUSPEND:
  84         case DRM_MODE_DPMS_OFF:
  85                 exynos_drm_connector_power(encoder, mode);
  86                 exynos_encoder->dpms = mode;
  87                 exynos_encoder->updated = false;
  88                 break;
  89         default:
  90                 DRM_ERROR("unspecified mode %d\n", mode);
  91                 break;
  92         }
  93
  94         mutex_unlock(&dev->struct_mutex);
  95 }
  96
  97 static bool
  98 exynos_drm_encoder_mode_fixup(struct drm_encoder *encoder,
  99                                const struct drm_display_mode *mode,
 100                                struct drm_display_mode *adjusted_mode)
 101 {
 102         struct drm_device *dev = encoder->dev;
 103         struct drm_connector *connector;
 104         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
 105         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 106
 107         DRM_DEBUG_KMS("%s\n", __FILE__);
 108
 109         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 110                 if (connector->encoder == encoder)
 111                         if (manager_ops && manager_ops->mode_fixup)
 112                                 manager_ops->mode_fixup(manager->dev, connector,
 113                                                         mode, adjusted_mode);
 114         }
 115
 116         return true;
 117 }
 118
 119 static void disable_plane_to_crtc(struct drm_device *dev,
 120                                                 struct drm_crtc *old_crtc,
 121                                                 struct drm_crtc *new_crtc)
 122 {
 123         struct drm_plane *plane;
 124
 125         /*
 126          * if old_crtc isn't same as encoder->crtc then it means that
 127          * user changed crtc id to another one so the plane to old_crtc
 128          * should be disabled and plane->crtc should be set to new_crtc
 129          * (encoder->crtc)
 130          */
 131         list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
 132                 if (plane->crtc == old_crtc) {
 133                         /*
 134                          * do not change below call order.
 135                          *
 136                          * plane->funcs->disable_plane call checks
 137                          * if encoder->crtc is same as plane->crtc and if same
 138                          * then overlay_ops->disable callback will be called
 139                          * to diasble current hw overlay so plane->crtc should
 140                          * have new_crtc because new_crtc was set to
 141                          * encoder->crtc in advance.
 142                          */
 143                         plane->crtc = new_crtc;
 144                         plane->funcs->disable_plane(plane);
 145                 }
 146         }
 147 }
 148
 149 static void exynos_drm_encoder_mode_set(struct drm_encoder *encoder,
 150                                          struct drm_display_mode *mode,
 151                                          struct drm_display_mode *adjusted_mode)
 152 {
 153         struct drm_device *dev = encoder->dev;
 154         struct drm_connector *connector;
 155         struct exynos_drm_manager *manager;
 156         struct exynos_drm_manager_ops *manager_ops;
 157
 158         DRM_DEBUG_KMS("%s\n", __FILE__);
 159
 160         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 161                 if (connector->encoder == encoder) {
 162                         struct exynos_drm_encoder *exynos_encoder;
 163
 164                         exynos_encoder = to_exynos_encoder(encoder);
 165
 166                         if (exynos_encoder->old_crtc != encoder->crtc &&
 167                                         exynos_encoder->old_crtc) {
 168
 169                                 /*
 170                                  * disable a plane to old crtc and change
 171                                  * crtc of the plane to new one.
 172                                  */
 173                                 disable_plane_to_crtc(dev,
 174                                                 exynos_encoder->old_crtc,
 175                                                 encoder->crtc);
 176                         }
 177
 178                         manager = exynos_drm_get_manager(encoder);
 179                         manager_ops = manager->ops;
 180
 181                         if (manager_ops && manager_ops->mode_set)
 182                                 manager_ops->mode_set(manager->dev,
 183                                                         adjusted_mode);
 184
 185                         exynos_encoder->old_crtc = encoder->crtc;
 186                 }
 187         }
 188 }
 189
 190 static void exynos_drm_encoder_prepare(struct drm_encoder *encoder)
 191 {
 192         DRM_DEBUG_KMS("%s\n", __FILE__);
 193
 194         /* drm framework doesn't check NULL. */
 195 }
 196
 197 static void exynos_drm_encoder_commit(struct drm_encoder *encoder)
 198 {
 199         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
 200         struct exynos_drm_manager *manager = exynos_encoder->manager;
 201         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 202
 203         DRM_DEBUG_KMS("%s\n", __FILE__);
 204
 205         if (manager_ops && manager_ops->commit)
 206                 manager_ops->commit(manager->dev);
 207
 208         /*
 209          * this will avoid one issue that overlay data is updated to
 210          * real hardware two times.
 211          * And this variable will be used to check if the data was
 212          * already updated or not by exynos_drm_encoder_dpms function.
 213          */
 214         exynos_encoder->updated = true;
 215
 216         /*
 217          * In case of setcrtc, there is no way to update encoder's dpms
 218          * so update it here.
 219          */
 220         exynos_encoder->dpms = DRM_MODE_DPMS_ON;
 221 }
 222
 223 void exynos_drm_encoder_complete_scanout(struct drm_framebuffer *fb)
 224 {
 225         struct exynos_drm_encoder *exynos_encoder;
 226         struct exynos_drm_manager_ops *ops;
 227         struct drm_device *dev = fb->dev;
 228         struct drm_encoder *encoder;
 229
 230         /*
 231          * make sure that overlay data are updated to real hardware
 232          * for all encoders.
 233          */
 234         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 235                 exynos_encoder = to_exynos_encoder(encoder);
 236                 ops = exynos_encoder->manager->ops;
 237
 238                 /*
 239                  * wait for vblank interrupt
 240                  * - this makes sure that overlay data are updated to
 241                  *      real hardware.
 242                  */
 243                 if (ops->wait_for_vblank)
 244                         ops->wait_for_vblank(exynos_encoder->manager->dev);
 245         }
 246 }
 247
 248
 249 static void exynos_drm_encoder_disable(struct drm_encoder *encoder)
 250 {
 251         struct drm_plane *plane;
 252         struct drm_device *dev = encoder->dev;
 253
 254         exynos_drm_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
 255
 256         /* all planes connected to this encoder should be also disabled. */
 257         list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
 258                 if (plane->crtc == encoder->crtc)
 259                         plane->funcs->disable_plane(plane);
 260         }
 261 }
 262
 263 static struct drm_encoder_helper_funcs exynos_encoder_helper_funcs = {
 264         .dpms           = exynos_drm_encoder_dpms,
 265         .mode_fixup     = exynos_drm_encoder_mode_fixup,
 266         .mode_set       = exynos_drm_encoder_mode_set,
 267         .prepare        = exynos_drm_encoder_prepare,
 268         .commit         = exynos_drm_encoder_commit,
 269         .disable        = exynos_drm_encoder_disable,
 270 };
 271
 272 static void exynos_drm_encoder_destroy(struct drm_encoder *encoder)
 273 {
 274         struct exynos_drm_encoder *exynos_encoder =
 275                 to_exynos_encoder(encoder);
 276
 277         DRM_DEBUG_KMS("%s\n", __FILE__);
 278
 279         exynos_encoder->manager->pipe = -1;
 280
 281         drm_encoder_cleanup(encoder);
 282         kfree(exynos_encoder);
 283 }
 284
 285 static struct drm_encoder_funcs exynos_encoder_funcs = {
 286         .destroy = exynos_drm_encoder_destroy,
 287 };
 288
 289 static unsigned int exynos_drm_encoder_clones(struct drm_encoder *encoder)
 290 {
 291         struct drm_encoder *clone;
 292         struct drm_device *dev = encoder->dev;
 293         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
 294         struct exynos_drm_display_ops *display_ops =
 295                                 exynos_encoder->manager->display_ops;
 296         unsigned int clone_mask = 0;
 297         int cnt = 0;
 298
 299         list_for_each_entry(clone, &dev->mode_config.encoder_list, head) {
 300                 switch (display_ops->type) {
 301                 case EXYNOS_DISPLAY_TYPE_LCD:
 302                 case EXYNOS_DISPLAY_TYPE_HDMI:
 303                 case EXYNOS_DISPLAY_TYPE_VIDI:
 304                         clone_mask |= (1 << (cnt++));
 305                         break;
 306                 default:
 307                         continue;
 308                 }
 309         }
 310
 311         return clone_mask;
 312 }
 313
 314 void exynos_drm_encoder_setup(struct drm_device *dev)
 315 {
 316         struct drm_encoder *encoder;
 317
 318         DRM_DEBUG_KMS("%s\n", __FILE__);
 319
 320         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
 321                 encoder->possible_clones = exynos_drm_encoder_clones(encoder);
 322 }
 323
 324 struct drm_encoder *
 325 exynos_drm_encoder_create(struct drm_device *dev,
 326                            struct exynos_drm_manager *manager,
 327                            unsigned int possible_crtcs)
 328 {
 329         struct drm_encoder *encoder;
 330         struct exynos_drm_encoder *exynos_encoder;
 331
 332         DRM_DEBUG_KMS("%s\n", __FILE__);
 333
 334         if (!manager || !possible_crtcs)
 335                 return NULL;
 336
 337         if (!manager->dev)
 338                 return NULL;
 339
 340         exynos_encoder = kzalloc(sizeof(*exynos_encoder), GFP_KERNEL);
 341         if (!exynos_encoder) {
 342                 DRM_ERROR("failed to allocate encoder\n");
 343                 return NULL;
 344         }
 345
 346         exynos_encoder->dpms = DRM_MODE_DPMS_OFF;
 347         exynos_encoder->manager = manager;
 348         encoder = &exynos_encoder->drm_encoder;
 349         encoder->possible_crtcs = possible_crtcs;
 350
 351         DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
 352
 353         drm_encoder_init(dev, encoder, &exynos_encoder_funcs,
 354                         DRM_MODE_ENCODER_TMDS);
 355
 356         drm_encoder_helper_add(encoder, &exynos_encoder_helper_funcs);
 357
 358         DRM_DEBUG_KMS("encoder has been created\n");
 359
 360         return encoder;
 361 }
 362
 363 struct exynos_drm_manager *exynos_drm_get_manager(struct drm_encoder *encoder)
 364 {
 365         return to_exynos_encoder(encoder)->manager;
 366 }
 367
 368 void exynos_drm_fn_encoder(struct drm_crtc *crtc, void *data,
 369                             void (*fn)(struct drm_encoder *, void *))
 370 {
 371         struct drm_device *dev = crtc->dev;
 372         struct drm_encoder *encoder;
 373         struct exynos_drm_private *private = dev->dev_private;
 374         struct exynos_drm_manager *manager;
 375
 376         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 377                 /*
 378                  * if crtc is detached from encoder, check pipe,
 379                  * otherwise check crtc attached to encoder
 380                  */
 381                 if (!encoder->crtc) {
 382                         manager = to_exynos_encoder(encoder)->manager;
 383                         if (manager->pipe < 0 ||
 384                                         private->crtc[manager->pipe] != crtc)
 385                                 continue;
 386                 } else {
 387                         if (encoder->crtc != crtc)
 388                                 continue;
 389                 }
 390
 391                 fn(encoder, data);
 392         }
 393 }
 394
 395 void exynos_drm_enable_vblank(struct drm_encoder *encoder, void *data)
 396 {
 397         struct exynos_drm_manager *manager =
 398                 to_exynos_encoder(encoder)->manager;
 399         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 400         int crtc = *(int *)data;
 401
 402         if (manager->pipe != crtc)
 403                 return;
 404
 405         if (manager_ops->enable_vblank)
 406                 manager_ops->enable_vblank(manager->dev);
 407 }
 408
 409 void exynos_drm_disable_vblank(struct drm_encoder *encoder, void *data)
 410 {
 411         struct exynos_drm_manager *manager =
 412                 to_exynos_encoder(encoder)->manager;
 413         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 414         int crtc = *(int *)data;
 415
 416         if (manager->pipe != crtc)
 417                 return;
 418
 419         if (manager_ops->disable_vblank)
 420                 manager_ops->disable_vblank(manager->dev);
 421 }
 422
 423 void exynos_drm_encoder_crtc_dpms(struct drm_encoder *encoder, void *data)
 424 {
 425         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
 426         struct exynos_drm_manager *manager = exynos_encoder->manager;
 427         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 428         int mode = *(int *)data;
 429
 430         DRM_DEBUG_KMS("%s\n", __FILE__);
 431
 432         if (manager_ops && manager_ops->dpms)
 433                 manager_ops->dpms(manager->dev, mode);
 434
 435         /*
 436          * if this condition is ok then it means that the crtc is already
 437          * detached from encoder and last function for detaching is properly
 438          * done, so clear pipe from manager to prevent repeated call.
 439          */
 440         if (mode > DRM_MODE_DPMS_ON) {
 441                 if (!encoder->crtc)
 442                         manager->pipe = -1;
 443         }
 444 }
 445
 446 void exynos_drm_encoder_crtc_pipe(struct drm_encoder *encoder, void *data)
 447 {
 448         struct exynos_drm_manager *manager =
 449                 to_exynos_encoder(encoder)->manager;
 450         int pipe = *(int *)data;
 451
 452         DRM_DEBUG_KMS("%s\n", __FILE__);
 453
 454         /*
 455          * when crtc is detached from encoder, this pipe is used
 456          * to select manager operation
 457          */
 458         manager->pipe = pipe;
 459 }
 460
 461 void exynos_drm_encoder_plane_mode_set(struct drm_encoder *encoder, void *data)
 462 {
 463         struct exynos_drm_manager *manager =
 464                 to_exynos_encoder(encoder)->manager;
 465         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 466         struct exynos_drm_overlay *overlay = data;
 467
 468         DRM_DEBUG_KMS("%s\n", __FILE__);
 469
 470         if (overlay_ops && overlay_ops->mode_set)
 471                 overlay_ops->mode_set(manager->dev, overlay);
 472 }
 473
 474 void exynos_drm_encoder_plane_commit(struct drm_encoder *encoder, void *data)
 475 {
 476         struct exynos_drm_manager *manager =
 477                 to_exynos_encoder(encoder)->manager;
 478         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 479         int zpos = DEFAULT_ZPOS;
 480
 481         DRM_DEBUG_KMS("%s\n", __FILE__);
 482
 483         if (data)
 484                 zpos = *(int *)data;
 485
 486         if (overlay_ops && overlay_ops->commit)
 487                 overlay_ops->commit(manager->dev, zpos);
 488 }
 489
 490 void exynos_drm_encoder_plane_enable(struct drm_encoder *encoder, void *data)
 491 {
 492         struct exynos_drm_manager *manager =
 493                 to_exynos_encoder(encoder)->manager;
 494         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 495         int zpos = DEFAULT_ZPOS;
 496
 497         DRM_DEBUG_KMS("%s\n", __FILE__);
 498
 499         if (data)
 500                 zpos = *(int *)data;
 501
 502         if (overlay_ops && overlay_ops->enable)
 503                 overlay_ops->enable(manager->dev, zpos);
 504 }
 505
 506 void exynos_drm_encoder_plane_disable(struct drm_encoder *encoder, void *data)
 507 {
 508         struct exynos_drm_manager *manager =
 509                 to_exynos_encoder(encoder)->manager;
 510         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 511         int zpos = DEFAULT_ZPOS;
 512
 513         DRM_DEBUG_KMS("%s\n", __FILE__);
 514
 515         if (data)
 516                 zpos = *(int *)data;
 517
 518         if (overlay_ops && overlay_ops->disable)
 519                 overlay_ops->disable(manager->dev, zpos);
 520 }