drivers/gpu/drm/exynos/exynos_drm_vidi.c

   1 /* exynos_drm_vidi.c
   2  *
   3  * Copyright (C) 2012 Samsung Electronics Co.Ltd
   4  * Authors:
   5  *      Inki Dae <inki.dae@samsung.com>
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  *
  12  */
  13 #include <drm/drmP.h>
  14
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/platform_device.h>
  18
  19 #include <drm/exynos_drm.h>
  20
  21 #include <drm/drm_edid.h>
  22 #include <drm/drm_crtc_helper.h>
  23
  24 #include "exynos_drm_drv.h"
  25 #include "exynos_drm_crtc.h"
  26 #include "exynos_drm_encoder.h"
  27
  28 /* vidi has totally three virtual windows. */
  29 #define WINDOWS_NR              3
  30
  31 #define get_vidi_context(dev)   platform_get_drvdata(to_platform_device(dev))
  32
  33 struct vidi_win_data {
  34         unsigned int            offset_x;
  35         unsigned int            offset_y;
  36         unsigned int            ovl_width;
  37         unsigned int            ovl_height;
  38         unsigned int            fb_width;
  39         unsigned int            fb_height;
  40         unsigned int            bpp;
  41         dma_addr_t              dma_addr;
  42         unsigned int            buf_offsize;
  43         unsigned int            line_size;      /* bytes */
  44         bool                    enabled;
  45 };
  46
  47 struct vidi_context {
  48         struct exynos_drm_subdrv        subdrv;
  49         struct drm_crtc                 *crtc;
  50         struct vidi_win_data            win_data[WINDOWS_NR];
  51         struct edid                     *raw_edid;
  52         unsigned int                    clkdiv;
  53         unsigned int                    default_win;
  54         unsigned long                   irq_flags;
  55         unsigned int                    connected;
  56         bool                            vblank_on;
  57         bool                            suspended;
  58         bool                            direct_vblank;
  59         struct work_struct              work;
  60         struct mutex                    lock;
  61 };
  62
  63 static const char fake_edid_info[] = {
  64         0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
  65         0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
  66         0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
  67         0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
  68         0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
  69         0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
  70         0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
  71         0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
  72         0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
  73         0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
  74         0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
  75         0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
  76         0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
  77         0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
  78         0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
  79         0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
  80         0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
  81         0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
  82         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  83         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  84         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  85         0x00, 0x00, 0x00, 0x06
  86 };
  87
  88 static bool vidi_display_is_connected(struct device *dev)
  89 {
  90         struct vidi_context *ctx = get_vidi_context(dev);
  91
  92         DRM_DEBUG_KMS("%s\n", __FILE__);
  93
  94         /*
  95          * connection request would come from user side
  96          * to do hotplug through specific ioctl.
  97          */
  98         return ctx->connected ? true : false;
  99 }
 100
 101 static struct edid *vidi_get_edid(struct device *dev,
 102                         struct drm_connector *connector)
 103 {
 104         struct vidi_context *ctx = get_vidi_context(dev);
 105         struct edid *edid;
 106         int edid_len;
 107
 108         DRM_DEBUG_KMS("%s\n", __FILE__);
 109
 110         /*
 111          * the edid data comes from user side and it would be set
 112          * to ctx->raw_edid through specific ioctl.
 113          */
 114         if (!ctx->raw_edid) {
 115                 DRM_DEBUG_KMS("raw_edid is null.\n");
 116                 return ERR_PTR(-EFAULT);
 117         }
 118
 119         edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
 120         edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
 121         if (!edid) {
 122                 DRM_DEBUG_KMS("failed to allocate edid\n");
 123                 return ERR_PTR(-ENOMEM);
 124         }
 125
 126         return edid;
 127 }
 128
 129 static void *vidi_get_panel(struct device *dev)
 130 {
 131         DRM_DEBUG_KMS("%s\n", __FILE__);
 132
 133         /* TODO. */
 134
 135         return NULL;
 136 }
 137
 138 static int vidi_check_timing(struct device *dev, void *timing)
 139 {
 140         DRM_DEBUG_KMS("%s\n", __FILE__);
 141
 142         /* TODO. */
 143
 144         return 0;
 145 }
 146
 147 static int vidi_display_power_on(struct device *dev, int mode)
 148 {
 149         DRM_DEBUG_KMS("%s\n", __FILE__);
 150
 151         /* TODO */
 152
 153         return 0;
 154 }
 155
 156 static struct exynos_drm_display_ops vidi_display_ops = {
 157         .type = EXYNOS_DISPLAY_TYPE_VIDI,
 158         .is_connected = vidi_display_is_connected,
 159         .get_edid = vidi_get_edid,
 160         .get_panel = vidi_get_panel,
 161         .check_timing = vidi_check_timing,
 162         .power_on = vidi_display_power_on,
 163 };
 164
 165 static void vidi_dpms(struct device *subdrv_dev, int mode)
 166 {
 167         struct vidi_context *ctx = get_vidi_context(subdrv_dev);
 168
 169         DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
 170
 171         mutex_lock(&ctx->lock);
 172
 173         switch (mode) {
 174         case DRM_MODE_DPMS_ON:
 175                 /* TODO. */
 176                 break;
 177         case DRM_MODE_DPMS_STANDBY:
 178         case DRM_MODE_DPMS_SUSPEND:
 179         case DRM_MODE_DPMS_OFF:
 180                 /* TODO. */
 181                 break;
 182         default:
 183                 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
 184                 break;
 185         }
 186
 187         mutex_unlock(&ctx->lock);
 188 }
 189
 190 static void vidi_apply(struct device *subdrv_dev)
 191 {
 192         struct vidi_context *ctx = get_vidi_context(subdrv_dev);
 193         struct exynos_drm_manager *mgr = ctx->subdrv.manager;
 194         struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
 195         struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
 196         struct vidi_win_data *win_data;
 197         int i;
 198
 199         DRM_DEBUG_KMS("%s\n", __FILE__);
 200
 201         for (i = 0; i < WINDOWS_NR; i++) {
 202                 win_data = &ctx->win_data[i];
 203                 if (win_data->enabled && (ovl_ops && ovl_ops->commit))
 204                         ovl_ops->commit(subdrv_dev, i);
 205         }
 206
 207         if (mgr_ops && mgr_ops->commit)
 208                 mgr_ops->commit(subdrv_dev);
 209 }
 210
 211 static void vidi_commit(struct device *dev)
 212 {
 213         struct vidi_context *ctx = get_vidi_context(dev);
 214
 215         DRM_DEBUG_KMS("%s\n", __FILE__);
 216
 217         if (ctx->suspended)
 218                 return;
 219 }
 220
 221 static int vidi_enable_vblank(struct device *dev)
 222 {
 223         struct vidi_context *ctx = get_vidi_context(dev);
 224
 225         DRM_DEBUG_KMS("%s\n", __FILE__);
 226
 227         if (ctx->suspended)
 228                 return -EPERM;
 229
 230         if (!test_and_set_bit(0, &ctx->irq_flags))
 231                 ctx->vblank_on = true;
 232
 233         ctx->direct_vblank = true;
 234
 235         /*
 236          * in case of page flip request, vidi_finish_pageflip function
 237          * will not be called because direct_vblank is true and then
 238          * that function will be called by overlay_ops->commit callback
 239          */
 240         schedule_work(&ctx->work);
 241
 242         return 0;
 243 }
 244
 245 static void vidi_disable_vblank(struct device *dev)
 246 {
 247         struct vidi_context *ctx = get_vidi_context(dev);
 248
 249         DRM_DEBUG_KMS("%s\n", __FILE__);
 250
 251         if (ctx->suspended)
 252                 return;
 253
 254         if (test_and_clear_bit(0, &ctx->irq_flags))
 255                 ctx->vblank_on = false;
 256 }
 257
 258 static struct exynos_drm_manager_ops vidi_manager_ops = {
 259         .dpms = vidi_dpms,
 260         .apply = vidi_apply,
 261         .commit = vidi_commit,
 262         .enable_vblank = vidi_enable_vblank,
 263         .disable_vblank = vidi_disable_vblank,
 264 };
 265
 266 static void vidi_win_mode_set(struct device *dev,
 267                               struct exynos_drm_overlay *overlay)
 268 {
 269         struct vidi_context *ctx = get_vidi_context(dev);
 270         struct vidi_win_data *win_data;
 271         int win;
 272         unsigned long offset;
 273
 274         DRM_DEBUG_KMS("%s\n", __FILE__);
 275
 276         if (!overlay) {
 277                 dev_err(dev, "overlay is NULL\n");
 278                 return;
 279         }
 280
 281         win = overlay->zpos;
 282         if (win == DEFAULT_ZPOS)
 283                 win = ctx->default_win;
 284
 285         if (win < 0 || win > WINDOWS_NR)
 286                 return;
 287
 288         offset = overlay->fb_x * (overlay->bpp >> 3);
 289         offset += overlay->fb_y * overlay->pitch;
 290
 291         DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
 292
 293         win_data = &ctx->win_data[win];
 294
 295         win_data->offset_x = overlay->crtc_x;
 296         win_data->offset_y = overlay->crtc_y;
 297         win_data->ovl_width = overlay->crtc_width;
 298         win_data->ovl_height = overlay->crtc_height;
 299         win_data->fb_width = overlay->fb_width;
 300         win_data->fb_height = overlay->fb_height;
 301         win_data->dma_addr = overlay->dma_addr[0] + offset;
 302         win_data->bpp = overlay->bpp;
 303         win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
 304                                 (overlay->bpp >> 3);
 305         win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
 306
 307         /*
 308          * some parts of win_data should be transferred to user side
 309          * through specific ioctl.
 310          */
 311
 312         DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
 313                         win_data->offset_x, win_data->offset_y);
 314         DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
 315                         win_data->ovl_width, win_data->ovl_height);
 316         DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
 317         DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
 318                         overlay->fb_width, overlay->crtc_width);
 319 }
 320
 321 static void vidi_win_commit(struct device *dev, int zpos)
 322 {
 323         struct vidi_context *ctx = get_vidi_context(dev);
 324         struct vidi_win_data *win_data;
 325         int win = zpos;
 326
 327         DRM_DEBUG_KMS("%s\n", __FILE__);
 328
 329         if (ctx->suspended)
 330                 return;
 331
 332         if (win == DEFAULT_ZPOS)
 333                 win = ctx->default_win;
 334
 335         if (win < 0 || win > WINDOWS_NR)
 336                 return;
 337
 338         win_data = &ctx->win_data[win];
 339
 340         win_data->enabled = true;
 341
 342         DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
 343
 344         if (ctx->vblank_on)
 345                 schedule_work(&ctx->work);
 346 }
 347
 348 static void vidi_win_disable(struct device *dev, int zpos)
 349 {
 350         struct vidi_context *ctx = get_vidi_context(dev);
 351         struct vidi_win_data *win_data;
 352         int win = zpos;
 353
 354         DRM_DEBUG_KMS("%s\n", __FILE__);
 355
 356         if (win == DEFAULT_ZPOS)
 357                 win = ctx->default_win;
 358
 359         if (win < 0 || win > WINDOWS_NR)
 360                 return;
 361
 362         win_data = &ctx->win_data[win];
 363         win_data->enabled = false;
 364
 365         /* TODO. */
 366 }
 367
 368 static struct exynos_drm_overlay_ops vidi_overlay_ops = {
 369         .mode_set = vidi_win_mode_set,
 370         .commit = vidi_win_commit,
 371         .disable = vidi_win_disable,
 372 };
 373
 374 static struct exynos_drm_manager vidi_manager = {
 375         .pipe           = -1,
 376         .ops            = &vidi_manager_ops,
 377         .overlay_ops    = &vidi_overlay_ops,
 378         .display_ops    = &vidi_display_ops,
 379 };
 380
 381 static void vidi_fake_vblank_handler(struct work_struct *work)
 382 {
 383         struct vidi_context *ctx = container_of(work, struct vidi_context,
 384                                         work);
 385         struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
 386         struct exynos_drm_manager *manager = subdrv->manager;
 387
 388         if (manager->pipe < 0)
 389                 return;
 390
 391         /* refresh rate is about 50Hz. */
 392         usleep_range(16000, 20000);
 393
 394         mutex_lock(&ctx->lock);
 395
 396         if (ctx->direct_vblank) {
 397                 drm_handle_vblank(subdrv->drm_dev, manager->pipe);
 398                 ctx->direct_vblank = false;
 399                 mutex_unlock(&ctx->lock);
 400                 return;
 401         }
 402
 403         mutex_unlock(&ctx->lock);
 404
 405         exynos_drm_crtc_finish_pageflip(subdrv->drm_dev, manager->pipe);
 406 }
 407
 408 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
 409 {
 410         DRM_DEBUG_KMS("%s\n", __FILE__);
 411
 412         /*
 413          * enable drm irq mode.
 414          * - with irq_enabled = 1, we can use the vblank feature.
 415          *
 416          * P.S. note that we wouldn't use drm irq handler but
 417          *      just specific driver own one instead because
 418          *      drm framework supports only one irq handler.
 419          */
 420         drm_dev->irq_enabled = 1;
 421
 422         /*
 423          * with vblank_disable_allowed = 1, vblank interrupt will be disabled
 424          * by drm timer once a current process gives up ownership of
 425          * vblank event.(after drm_vblank_put function is called)
 426          */
 427         drm_dev->vblank_disable_allowed = 1;
 428
 429         return 0;
 430 }
 431
 432 static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
 433 {
 434         DRM_DEBUG_KMS("%s\n", __FILE__);
 435
 436         /* TODO. */
 437 }
 438
 439 static int vidi_power_on(struct vidi_context *ctx, bool enable)
 440 {
 441         struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
 442         struct device *dev = subdrv->dev;
 443
 444         DRM_DEBUG_KMS("%s\n", __FILE__);
 445
 446         if (enable != false && enable != true)
 447                 return -EINVAL;
 448
 449         if (enable) {
 450                 ctx->suspended = false;
 451
 452                 /* if vblank was enabled status, enable it again. */
 453                 if (test_and_clear_bit(0, &ctx->irq_flags))
 454                         vidi_enable_vblank(dev);
 455
 456                 vidi_apply(dev);
 457         } else {
 458                 ctx->suspended = true;
 459         }
 460
 461         return 0;
 462 }
 463
 464 static int vidi_show_connection(struct device *dev,
 465                                 struct device_attribute *attr, char *buf)
 466 {
 467         int rc;
 468         struct vidi_context *ctx = get_vidi_context(dev);
 469
 470         mutex_lock(&ctx->lock);
 471
 472         rc = sprintf(buf, "%d\n", ctx->connected);
 473
 474         mutex_unlock(&ctx->lock);
 475
 476         return rc;
 477 }
 478
 479 static int vidi_store_connection(struct device *dev,
 480                                 struct device_attribute *attr,
 481                                 const char *buf, size_t len)
 482 {
 483         struct vidi_context *ctx = get_vidi_context(dev);
 484         int ret;
 485
 486         DRM_DEBUG_KMS("%s\n", __FILE__);
 487
 488         ret = kstrtoint(buf, 0, &ctx->connected);
 489         if (ret)
 490                 return ret;
 491
 492         if (ctx->connected > 1)
 493                 return -EINVAL;
 494
 495         /* use fake edid data for test. */
 496         if (!ctx->raw_edid)
 497                 ctx->raw_edid = (struct edid *)fake_edid_info;
 498
 499         /* if raw_edid isn't same as fake data then it can't be tested. */
 500         if (ctx->raw_edid != (struct edid *)fake_edid_info) {
 501                 DRM_DEBUG_KMS("edid data is not fake data.\n");
 502                 return -EINVAL;
 503         }
 504
 505         DRM_DEBUG_KMS("requested connection.\n");
 506
 507         drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
 508
 509         return len;
 510 }
 511
 512 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
 513                         vidi_store_connection);
 514
 515 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
 516                                 struct drm_file *file_priv)
 517 {
 518         struct vidi_context *ctx = NULL;
 519         struct drm_encoder *encoder;
 520         struct exynos_drm_manager *manager;
 521         struct exynos_drm_display_ops *display_ops;
 522         struct drm_exynos_vidi_connection *vidi = data;
 523         int edid_len;
 524
 525         DRM_DEBUG_KMS("%s\n", __FILE__);
 526
 527         if (!vidi) {
 528                 DRM_DEBUG_KMS("user data for vidi is null.\n");
 529                 return -EINVAL;
 530         }
 531
 532         if (vidi->connection > 1) {
 533                 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
 534                 return -EINVAL;
 535         }
 536
 537         list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
 538                                                                 head) {
 539                 manager = exynos_drm_get_manager(encoder);
 540                 display_ops = manager->display_ops;
 541
 542                 if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
 543                         ctx = get_vidi_context(manager->dev);
 544                         break;
 545                 }
 546         }
 547
 548         if (!ctx) {
 549                 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
 550                 return -EINVAL;
 551         }
 552
 553         if (ctx->connected == vidi->connection) {
 554                 DRM_DEBUG_KMS("same connection request.\n");
 555                 return -EINVAL;
 556         }
 557
 558         if (vidi->connection) {
 559                 struct edid *raw_edid  = (struct edid *)(uint32_t)vidi->edid;
 560                 if (!drm_edid_is_valid(raw_edid)) {
 561                         DRM_DEBUG_KMS("edid data is invalid.\n");
 562                         return -EINVAL;
 563                 }
 564                 edid_len = (1 + raw_edid->extensions) * EDID_LENGTH;
 565                 ctx->raw_edid = kmemdup(raw_edid, edid_len, GFP_KERNEL);
 566                 if (!ctx->raw_edid) {
 567                         DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
 568                         return -ENOMEM;
 569                 }
 570         } else {
 571                 /*
 572                  * with connection = 0, free raw_edid
 573                  * only if raw edid data isn't same as fake data.
 574                  */
 575                 if (ctx->raw_edid && ctx->raw_edid !=
 576                                 (struct edid *)fake_edid_info) {
 577                         kfree(ctx->raw_edid);
 578                         ctx->raw_edid = NULL;
 579                 }
 580         }
 581
 582         ctx->connected = vidi->connection;
 583         drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
 584
 585         return 0;
 586 }
 587
 588 static int vidi_probe(struct platform_device *pdev)
 589 {
 590         struct device *dev = &pdev->dev;
 591         struct vidi_context *ctx;
 592         struct exynos_drm_subdrv *subdrv;
 593         int ret;
 594
 595         DRM_DEBUG_KMS("%s\n", __FILE__);
 596
 597         ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
 598         if (!ctx)
 599                 return -ENOMEM;
 600
 601         ctx->default_win = 0;
 602
 603         INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
 604
 605         subdrv = &ctx->subdrv;
 606         subdrv->dev = dev;
 607         subdrv->manager = &vidi_manager;
 608         subdrv->probe = vidi_subdrv_probe;
 609         subdrv->remove = vidi_subdrv_remove;
 610
 611         mutex_init(&ctx->lock);
 612
 613         platform_set_drvdata(pdev, ctx);
 614
 615         ret = device_create_file(&pdev->dev, &dev_attr_connection);
 616         if (ret < 0)
 617                 DRM_INFO("failed to create connection sysfs.\n");
 618
 619         exynos_drm_subdrv_register(subdrv);
 620
 621         return 0;
 622 }
 623
 624 static int vidi_remove(struct platform_device *pdev)
 625 {
 626         struct vidi_context *ctx = platform_get_drvdata(pdev);
 627
 628         DRM_DEBUG_KMS("%s\n", __FILE__);
 629
 630         exynos_drm_subdrv_unregister(&ctx->subdrv);
 631
 632         if (ctx->raw_edid != (struct edid *)fake_edid_info) {
 633                 kfree(ctx->raw_edid);
 634                 ctx->raw_edid = NULL;
 635         }
 636
 637         return 0;
 638 }
 639
 640 #ifdef CONFIG_PM_SLEEP
 641 static int vidi_suspend(struct device *dev)
 642 {
 643         struct vidi_context *ctx = get_vidi_context(dev);
 644
 645         return vidi_power_on(ctx, false);
 646 }
 647
 648 static int vidi_resume(struct device *dev)
 649 {
 650         struct vidi_context *ctx = get_vidi_context(dev);
 651
 652         return vidi_power_on(ctx, true);
 653 }
 654 #endif
 655
 656 static const struct dev_pm_ops vidi_pm_ops = {
 657         SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
 658 };
 659
 660 struct platform_driver vidi_driver = {
 661         .probe          = vidi_probe,
 662         .remove         = vidi_remove,
 663         .driver         = {
 664                 .name   = "exynos-drm-vidi",
 665                 .owner  = THIS_MODULE,
 666                 .pm     = &vidi_pm_ops,
 667         },
 668 };