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 "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_edid.h"
  22 #include "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         void __iomem            *vaddr;
  43         unsigned int            buf_offsize;
  44         unsigned int            line_size;      /* bytes */
  45         bool                    enabled;
  46 };
  47
  48 struct vidi_context {
  49         struct exynos_drm_subdrv        subdrv;
  50         struct drm_crtc                 *crtc;
  51         struct vidi_win_data            win_data[WINDOWS_NR];
  52         struct edid                     *raw_edid;
  53         unsigned int                    clkdiv;
  54         unsigned int                    default_win;
  55         unsigned long                   irq_flags;
  56         unsigned int                    connected;
  57         bool                            vblank_on;
  58         bool                            suspended;
  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 void vidi_fake_vblank_handler(struct work_struct *work);
  89
  90 static bool vidi_display_is_connected(struct device *dev)
  91 {
  92         struct vidi_context *ctx = get_vidi_context(dev);
  93
  94         DRM_DEBUG_KMS("%s\n", __FILE__);
  95
  96         /*
  97          * connection request would come from user side
  98          * to do hotplug through specific ioctl.
  99          */
 100         return ctx->connected ? true : false;
 101 }
 102
 103 static int vidi_get_edid(struct device *dev, struct drm_connector *connector,
 104                                 u8 *edid, int len)
 105 {
 106         struct vidi_context *ctx = get_vidi_context(dev);
 107         struct edid *raw_edid;
 108
 109         DRM_DEBUG_KMS("%s\n", __FILE__);
 110
 111         /*
 112          * the edid data comes from user side and it would be set
 113          * to ctx->raw_edid through specific ioctl.
 114          */
 115         if (!ctx->raw_edid) {
 116                 DRM_DEBUG_KMS("raw_edid is null.\n");
 117                 return -EFAULT;
 118         }
 119
 120         raw_edid = kzalloc(len, GFP_KERNEL);
 121         if (!raw_edid) {
 122                 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
 123                 return -ENOMEM;
 124         }
 125
 126         memcpy(raw_edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions)
 127                                                 * EDID_LENGTH, len));
 128
 129         /* attach the edid data to connector. */
 130         connector->display_info.raw_edid = (char *)raw_edid;
 131
 132         memcpy(edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions)
 133                                         * EDID_LENGTH, len));
 134
 135         return 0;
 136 }
 137
 138 static void *vidi_get_panel(struct device *dev)
 139 {
 140         DRM_DEBUG_KMS("%s\n", __FILE__);
 141
 142         /* TODO. */
 143
 144         return NULL;
 145 }
 146
 147 static int vidi_check_timing(struct device *dev, void *timing)
 148 {
 149         DRM_DEBUG_KMS("%s\n", __FILE__);
 150
 151         /* TODO. */
 152
 153         return 0;
 154 }
 155
 156 static int vidi_display_power_on(struct device *dev, int mode)
 157 {
 158         DRM_DEBUG_KMS("%s\n", __FILE__);
 159
 160         /* TODO */
 161
 162         return 0;
 163 }
 164
 165 static struct exynos_drm_display_ops vidi_display_ops = {
 166         .type = EXYNOS_DISPLAY_TYPE_VIDI,
 167         .is_connected = vidi_display_is_connected,
 168         .get_edid = vidi_get_edid,
 169         .get_panel = vidi_get_panel,
 170         .check_timing = vidi_check_timing,
 171         .power_on = vidi_display_power_on,
 172 };
 173
 174 static void vidi_dpms(struct device *subdrv_dev, int mode)
 175 {
 176         struct vidi_context *ctx = get_vidi_context(subdrv_dev);
 177
 178         DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
 179
 180         mutex_lock(&ctx->lock);
 181
 182         switch (mode) {
 183         case DRM_MODE_DPMS_ON:
 184                 /* TODO. */
 185                 break;
 186         case DRM_MODE_DPMS_STANDBY:
 187         case DRM_MODE_DPMS_SUSPEND:
 188         case DRM_MODE_DPMS_OFF:
 189                 /* TODO. */
 190                 break;
 191         default:
 192                 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
 193                 break;
 194         }
 195
 196         mutex_unlock(&ctx->lock);
 197 }
 198
 199 static void vidi_apply(struct device *subdrv_dev)
 200 {
 201         struct vidi_context *ctx = get_vidi_context(subdrv_dev);
 202         struct exynos_drm_manager *mgr = ctx->subdrv.manager;
 203         struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
 204         struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops;
 205         struct vidi_win_data *win_data;
 206         int i;
 207
 208         DRM_DEBUG_KMS("%s\n", __FILE__);
 209
 210         for (i = 0; i < WINDOWS_NR; i++) {
 211                 win_data = &ctx->win_data[i];
 212                 if (win_data->enabled && (ovl_ops && ovl_ops->commit))
 213                         ovl_ops->commit(subdrv_dev, i);
 214         }
 215
 216         if (mgr_ops && mgr_ops->commit)
 217                 mgr_ops->commit(subdrv_dev);
 218 }
 219
 220 static void vidi_commit(struct device *dev)
 221 {
 222         struct vidi_context *ctx = get_vidi_context(dev);
 223
 224         DRM_DEBUG_KMS("%s\n", __FILE__);
 225
 226         if (ctx->suspended)
 227                 return;
 228 }
 229
 230 static int vidi_enable_vblank(struct device *dev)
 231 {
 232         struct vidi_context *ctx = get_vidi_context(dev);
 233
 234         DRM_DEBUG_KMS("%s\n", __FILE__);
 235
 236         if (ctx->suspended)
 237                 return -EPERM;
 238
 239         if (!test_and_set_bit(0, &ctx->irq_flags))
 240                 ctx->vblank_on = true;
 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->vaddr = overlay->vaddr[0] + offset;
 303         win_data->bpp = overlay->bpp;
 304         win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
 305                                 (overlay->bpp >> 3);
 306         win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
 307
 308         /*
 309          * some parts of win_data should be transferred to user side
 310          * through specific ioctl.
 311          */
 312
 313         DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
 314                         win_data->offset_x, win_data->offset_y);
 315         DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
 316                         win_data->ovl_width, win_data->ovl_height);
 317         DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n",
 318                         (unsigned long)win_data->dma_addr,
 319                         (unsigned long)win_data->vaddr);
 320         DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
 321                         overlay->fb_width, overlay->crtc_width);
 322 }
 323
 324 static void vidi_win_commit(struct device *dev, int zpos)
 325 {
 326         struct vidi_context *ctx = get_vidi_context(dev);
 327         struct vidi_win_data *win_data;
 328         int win = zpos;
 329
 330         DRM_DEBUG_KMS("%s\n", __FILE__);
 331
 332         if (ctx->suspended)
 333                 return;
 334
 335         if (win == DEFAULT_ZPOS)
 336                 win = ctx->default_win;
 337
 338         if (win < 0 || win > WINDOWS_NR)
 339                 return;
 340
 341         win_data = &ctx->win_data[win];
 342
 343         win_data->enabled = true;
 344
 345         DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr);
 346
 347         if (ctx->vblank_on)
 348                 schedule_work(&ctx->work);
 349 }
 350
 351 static void vidi_win_disable(struct device *dev, int zpos)
 352 {
 353         struct vidi_context *ctx = get_vidi_context(dev);
 354         struct vidi_win_data *win_data;
 355         int win = zpos;
 356
 357         DRM_DEBUG_KMS("%s\n", __FILE__);
 358
 359         if (win == DEFAULT_ZPOS)
 360                 win = ctx->default_win;
 361
 362         if (win < 0 || win > WINDOWS_NR)
 363                 return;
 364
 365         win_data = &ctx->win_data[win];
 366         win_data->enabled = false;
 367
 368         /* TODO. */
 369 }
 370
 371 static struct exynos_drm_overlay_ops vidi_overlay_ops = {
 372         .mode_set = vidi_win_mode_set,
 373         .commit = vidi_win_commit,
 374         .disable = vidi_win_disable,
 375 };
 376
 377 static struct exynos_drm_manager vidi_manager = {
 378         .pipe           = -1,
 379         .ops            = &vidi_manager_ops,
 380         .overlay_ops    = &vidi_overlay_ops,
 381         .display_ops    = &vidi_display_ops,
 382 };
 383
 384 static void vidi_finish_pageflip(struct drm_device *drm_dev, int crtc)
 385 {
 386         struct exynos_drm_private *dev_priv = drm_dev->dev_private;
 387         struct drm_pending_vblank_event *e, *t;
 388         struct timeval now;
 389         unsigned long flags;
 390         bool is_checked = false;
 391
 392         spin_lock_irqsave(&drm_dev->event_lock, flags);
 393
 394         list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
 395                         base.link) {
 396                 /* if event's pipe isn't same as crtc then ignore it. */
 397                 if (crtc != e->pipe)
 398                         continue;
 399
 400                 is_checked = true;
 401
 402                 do_gettimeofday(&now);
 403                 e->event.sequence = 0;
 404                 e->event.tv_sec = now.tv_sec;
 405                 e->event.tv_usec = now.tv_usec;
 406
 407                 list_move_tail(&e->base.link, &e->base.file_priv->event_list);
 408                 wake_up_interruptible(&e->base.file_priv->event_wait);
 409         }
 410
 411         if (is_checked) {
 412                 /*
 413                  * call drm_vblank_put only in case that drm_vblank_get was
 414                  * called.
 415                  */
 416                 if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0)
 417                         drm_vblank_put(drm_dev, crtc);
 418
 419                 /*
 420                  * don't off vblank if vblank_disable_allowed is 1,
 421                  * because vblank would be off by timer handler.
 422                  */
 423                 if (!drm_dev->vblank_disable_allowed)
 424                         drm_vblank_off(drm_dev, crtc);
 425         }
 426
 427         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
 428 }
 429
 430 static void vidi_fake_vblank_handler(struct work_struct *work)
 431 {
 432         struct vidi_context *ctx = container_of(work, struct vidi_context,
 433                                         work);
 434         struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
 435         struct exynos_drm_manager *manager = subdrv->manager;
 436
 437         if (manager->pipe < 0)
 438                 return;
 439
 440         /* refresh rate is about 50Hz. */
 441         usleep_range(16000, 20000);
 442
 443         drm_handle_vblank(subdrv->drm_dev, manager->pipe);
 444         vidi_finish_pageflip(subdrv->drm_dev, manager->pipe);
 445 }
 446
 447 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
 448 {
 449         DRM_DEBUG_KMS("%s\n", __FILE__);
 450
 451         /*
 452          * enable drm irq mode.
 453          * - with irq_enabled = 1, we can use the vblank feature.
 454          *
 455          * P.S. note that we wouldn't use drm irq handler but
 456          *      just specific driver own one instead because
 457          *      drm framework supports only one irq handler.
 458          */
 459         drm_dev->irq_enabled = 1;
 460
 461         /*
 462          * with vblank_disable_allowed = 1, vblank interrupt will be disabled
 463          * by drm timer once a current process gives up ownership of
 464          * vblank event.(after drm_vblank_put function is called)
 465          */
 466         drm_dev->vblank_disable_allowed = 1;
 467
 468         return 0;
 469 }
 470
 471 static void vidi_subdrv_remove(struct drm_device *drm_dev)
 472 {
 473         DRM_DEBUG_KMS("%s\n", __FILE__);
 474
 475         /* TODO. */
 476 }
 477
 478 static int vidi_power_on(struct vidi_context *ctx, bool enable)
 479 {
 480         struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
 481         struct device *dev = subdrv->dev;
 482
 483         DRM_DEBUG_KMS("%s\n", __FILE__);
 484
 485         if (enable != false && enable != true)
 486                 return -EINVAL;
 487
 488         if (enable) {
 489                 ctx->suspended = false;
 490
 491                 /* if vblank was enabled status, enable it again. */
 492                 if (test_and_clear_bit(0, &ctx->irq_flags))
 493                         vidi_enable_vblank(dev);
 494
 495                 vidi_apply(dev);
 496         } else {
 497                 ctx->suspended = true;
 498         }
 499
 500         return 0;
 501 }
 502
 503 static int vidi_show_connection(struct device *dev,
 504                                 struct device_attribute *attr, char *buf)
 505 {
 506         int rc;
 507         struct vidi_context *ctx = get_vidi_context(dev);
 508
 509         mutex_lock(&ctx->lock);
 510
 511         rc = sprintf(buf, "%d\n", ctx->connected);
 512
 513         mutex_unlock(&ctx->lock);
 514
 515         return rc;
 516 }
 517
 518 static int vidi_store_connection(struct device *dev,
 519                                 struct device_attribute *attr,
 520                                 const char *buf, size_t len)
 521 {
 522         struct vidi_context *ctx = get_vidi_context(dev);
 523         int ret;
 524
 525         DRM_DEBUG_KMS("%s\n", __FILE__);
 526
 527         ret = kstrtoint(buf, 0, &ctx->connected);
 528         if (ret)
 529                 return ret;
 530
 531         if (ctx->connected > 1)
 532                 return -EINVAL;
 533
 534         DRM_DEBUG_KMS("requested connection.\n");
 535
 536         drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
 537
 538         return len;
 539 }
 540
 541 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
 542                         vidi_store_connection);
 543
 544 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
 545                                 struct drm_file *file_priv)
 546 {
 547         struct vidi_context *ctx = NULL;
 548         struct drm_encoder *encoder;
 549         struct exynos_drm_manager *manager;
 550         struct exynos_drm_display_ops *display_ops;
 551         struct drm_exynos_vidi_connection *vidi = data;
 552
 553         DRM_DEBUG_KMS("%s\n", __FILE__);
 554
 555         if (!vidi) {
 556                 DRM_DEBUG_KMS("user data for vidi is null.\n");
 557                 return -EINVAL;
 558         }
 559
 560         if (!vidi->edid) {
 561                 DRM_DEBUG_KMS("edid data is null.\n");
 562                 return -EINVAL;
 563         }
 564
 565         if (vidi->connection > 1) {
 566                 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
 567                 return -EINVAL;
 568         }
 569
 570         list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
 571                                                                 head) {
 572                 manager = exynos_drm_get_manager(encoder);
 573                 display_ops = manager->display_ops;
 574
 575                 if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) {
 576                         ctx = get_vidi_context(manager->dev);
 577                         break;
 578                 }
 579         }
 580
 581         if (!ctx) {
 582                 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
 583                 return -EINVAL;
 584         }
 585
 586         if (ctx->connected == vidi->connection) {
 587                 DRM_DEBUG_KMS("same connection request.\n");
 588                 return -EINVAL;
 589         }
 590
 591         if (vidi->connection)
 592                 ctx->raw_edid = (struct edid *)vidi->edid;
 593
 594         ctx->connected = vidi->connection;
 595         drm_helper_hpd_irq_event(ctx->subdrv.drm_dev);
 596
 597         return 0;
 598 }
 599
 600 static int __devinit vidi_probe(struct platform_device *pdev)
 601 {
 602         struct device *dev = &pdev->dev;
 603         struct vidi_context *ctx;
 604         struct exynos_drm_subdrv *subdrv;
 605         int ret;
 606
 607         DRM_DEBUG_KMS("%s\n", __FILE__);
 608
 609         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 610         if (!ctx)
 611                 return -ENOMEM;
 612
 613         ctx->default_win = 0;
 614
 615         INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
 616
 617         /* for test */
 618         ctx->raw_edid = (struct edid *)fake_edid_info;
 619
 620         subdrv = &ctx->subdrv;
 621         subdrv->dev = dev;
 622         subdrv->manager = &vidi_manager;
 623         subdrv->probe = vidi_subdrv_probe;
 624         subdrv->remove = vidi_subdrv_remove;
 625
 626         mutex_init(&ctx->lock);
 627
 628         platform_set_drvdata(pdev, ctx);
 629
 630         ret = device_create_file(&pdev->dev, &dev_attr_connection);
 631         if (ret < 0)
 632                 DRM_INFO("failed to create connection sysfs.\n");
 633
 634         exynos_drm_subdrv_register(subdrv);
 635
 636         return 0;
 637 }
 638
 639 static int __devexit vidi_remove(struct platform_device *pdev)
 640 {
 641         struct vidi_context *ctx = platform_get_drvdata(pdev);
 642
 643         DRM_DEBUG_KMS("%s\n", __FILE__);
 644
 645         exynos_drm_subdrv_unregister(&ctx->subdrv);
 646
 647         kfree(ctx);
 648
 649         return 0;
 650 }
 651
 652 #ifdef CONFIG_PM_SLEEP
 653 static int vidi_suspend(struct device *dev)
 654 {
 655         struct vidi_context *ctx = get_vidi_context(dev);
 656
 657         return vidi_power_on(ctx, false);
 658 }
 659
 660 static int vidi_resume(struct device *dev)
 661 {
 662         struct vidi_context *ctx = get_vidi_context(dev);
 663
 664         return vidi_power_on(ctx, true);
 665 }
 666 #endif
 667
 668 static const struct dev_pm_ops vidi_pm_ops = {
 669         SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume)
 670 };
 671
 672 struct platform_driver vidi_driver = {
 673         .probe          = vidi_probe,
 674         .remove         = __devexit_p(vidi_remove),
 675         .driver         = {
 676                 .name   = "exynos-drm-vidi",
 677                 .owner  = THIS_MODULE,
 678                 .pm     = &vidi_pm_ops,
 679         },
 680 };