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 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 bool direct_vblank; 60 struct work_struct work; 61 struct mutex lock; 62 }; 63 64 static const char fake_edid_info[] = { 65 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05, 66 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78, 67 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd, 68 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 69 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00, 70 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 71 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, 72 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 73 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 74 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47, 75 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1, 76 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83, 77 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00, 78 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c, 79 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a, 80 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00, 81 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, 82 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 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, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 86 0x00, 0x00, 0x00, 0x06 87 }; 88 89 static bool vidi_display_is_connected(struct device *dev) 90 { 91 struct vidi_context *ctx = get_vidi_context(dev); 92 93 DRM_DEBUG_KMS("%s\n", __FILE__); 94 95 /* 96 * connection request would come from user side 97 * to do hotplug through specific ioctl. 98 */ 99 return ctx->connected ? true : false; 100 } 101 102 static int vidi_get_edid(struct device *dev, struct drm_connector *connector, 103 u8 *edid, int len) 104 { 105 struct vidi_context *ctx = get_vidi_context(dev); 106 107 DRM_DEBUG_KMS("%s\n", __FILE__); 108 109 /* 110 * the edid data comes from user side and it would be set 111 * to ctx->raw_edid through specific ioctl. 112 */ 113 if (!ctx->raw_edid) { 114 DRM_DEBUG_KMS("raw_edid is null.\n"); 115 return -EFAULT; 116 } 117 118 memcpy(edid, ctx->raw_edid, min((1 + ctx->raw_edid->extensions) 119 * EDID_LENGTH, len)); 120 121 return 0; 122 } 123 124 static void *vidi_get_panel(struct device *dev) 125 { 126 DRM_DEBUG_KMS("%s\n", __FILE__); 127 128 /* TODO. */ 129 130 return NULL; 131 } 132 133 static int vidi_check_timing(struct device *dev, void *timing) 134 { 135 DRM_DEBUG_KMS("%s\n", __FILE__); 136 137 /* TODO. */ 138 139 return 0; 140 } 141 142 static int vidi_display_power_on(struct device *dev, int mode) 143 { 144 DRM_DEBUG_KMS("%s\n", __FILE__); 145 146 /* TODO */ 147 148 return 0; 149 } 150 151 static struct exynos_drm_display_ops vidi_display_ops = { 152 .type = EXYNOS_DISPLAY_TYPE_VIDI, 153 .is_connected = vidi_display_is_connected, 154 .get_edid = vidi_get_edid, 155 .get_panel = vidi_get_panel, 156 .check_timing = vidi_check_timing, 157 .power_on = vidi_display_power_on, 158 }; 159 160 static void vidi_dpms(struct device *subdrv_dev, int mode) 161 { 162 struct vidi_context *ctx = get_vidi_context(subdrv_dev); 163 164 DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode); 165 166 mutex_lock(&ctx->lock); 167 168 switch (mode) { 169 case DRM_MODE_DPMS_ON: 170 /* TODO. */ 171 break; 172 case DRM_MODE_DPMS_STANDBY: 173 case DRM_MODE_DPMS_SUSPEND: 174 case DRM_MODE_DPMS_OFF: 175 /* TODO. */ 176 break; 177 default: 178 DRM_DEBUG_KMS("unspecified mode %d\n", mode); 179 break; 180 } 181 182 mutex_unlock(&ctx->lock); 183 } 184 185 static void vidi_apply(struct device *subdrv_dev) 186 { 187 struct vidi_context *ctx = get_vidi_context(subdrv_dev); 188 struct exynos_drm_manager *mgr = ctx->subdrv.manager; 189 struct exynos_drm_manager_ops *mgr_ops = mgr->ops; 190 struct exynos_drm_overlay_ops *ovl_ops = mgr->overlay_ops; 191 struct vidi_win_data *win_data; 192 int i; 193 194 DRM_DEBUG_KMS("%s\n", __FILE__); 195 196 for (i = 0; i < WINDOWS_NR; i++) { 197 win_data = &ctx->win_data[i]; 198 if (win_data->enabled && (ovl_ops && ovl_ops->commit)) 199 ovl_ops->commit(subdrv_dev, i); 200 } 201 202 if (mgr_ops && mgr_ops->commit) 203 mgr_ops->commit(subdrv_dev); 204 } 205 206 static void vidi_commit(struct device *dev) 207 { 208 struct vidi_context *ctx = get_vidi_context(dev); 209 210 DRM_DEBUG_KMS("%s\n", __FILE__); 211 212 if (ctx->suspended) 213 return; 214 } 215 216 static int vidi_enable_vblank(struct device *dev) 217 { 218 struct vidi_context *ctx = get_vidi_context(dev); 219 220 DRM_DEBUG_KMS("%s\n", __FILE__); 221 222 if (ctx->suspended) 223 return -EPERM; 224 225 if (!test_and_set_bit(0, &ctx->irq_flags)) 226 ctx->vblank_on = true; 227 228 ctx->direct_vblank = true; 229 230 /* 231 * in case of page flip request, vidi_finish_pageflip function 232 * will not be called because direct_vblank is true and then 233 * that function will be called by overlay_ops->commit callback 234 */ 235 schedule_work(&ctx->work); 236 237 return 0; 238 } 239 240 static void vidi_disable_vblank(struct device *dev) 241 { 242 struct vidi_context *ctx = get_vidi_context(dev); 243 244 DRM_DEBUG_KMS("%s\n", __FILE__); 245 246 if (ctx->suspended) 247 return; 248 249 if (test_and_clear_bit(0, &ctx->irq_flags)) 250 ctx->vblank_on = false; 251 } 252 253 static struct exynos_drm_manager_ops vidi_manager_ops = { 254 .dpms = vidi_dpms, 255 .apply = vidi_apply, 256 .commit = vidi_commit, 257 .enable_vblank = vidi_enable_vblank, 258 .disable_vblank = vidi_disable_vblank, 259 }; 260 261 static void vidi_win_mode_set(struct device *dev, 262 struct exynos_drm_overlay *overlay) 263 { 264 struct vidi_context *ctx = get_vidi_context(dev); 265 struct vidi_win_data *win_data; 266 int win; 267 unsigned long offset; 268 269 DRM_DEBUG_KMS("%s\n", __FILE__); 270 271 if (!overlay) { 272 dev_err(dev, "overlay is NULL\n"); 273 return; 274 } 275 276 win = overlay->zpos; 277 if (win == DEFAULT_ZPOS) 278 win = ctx->default_win; 279 280 if (win < 0 || win > WINDOWS_NR) 281 return; 282 283 offset = overlay->fb_x * (overlay->bpp >> 3); 284 offset += overlay->fb_y * overlay->pitch; 285 286 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch); 287 288 win_data = &ctx->win_data[win]; 289 290 win_data->offset_x = overlay->crtc_x; 291 win_data->offset_y = overlay->crtc_y; 292 win_data->ovl_width = overlay->crtc_width; 293 win_data->ovl_height = overlay->crtc_height; 294 win_data->fb_width = overlay->fb_width; 295 win_data->fb_height = overlay->fb_height; 296 win_data->dma_addr = overlay->dma_addr[0] + offset; 297 win_data->vaddr = overlay->vaddr[0] + offset; 298 win_data->bpp = overlay->bpp; 299 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) * 300 (overlay->bpp >> 3); 301 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3); 302 303 /* 304 * some parts of win_data should be transferred to user side 305 * through specific ioctl. 306 */ 307 308 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n", 309 win_data->offset_x, win_data->offset_y); 310 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", 311 win_data->ovl_width, win_data->ovl_height); 312 DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n", 313 (unsigned long)win_data->dma_addr, 314 (unsigned long)win_data->vaddr); 315 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n", 316 overlay->fb_width, overlay->crtc_width); 317 } 318 319 static void vidi_win_commit(struct device *dev, int zpos) 320 { 321 struct vidi_context *ctx = get_vidi_context(dev); 322 struct vidi_win_data *win_data; 323 int win = zpos; 324 325 DRM_DEBUG_KMS("%s\n", __FILE__); 326 327 if (ctx->suspended) 328 return; 329 330 if (win == DEFAULT_ZPOS) 331 win = ctx->default_win; 332 333 if (win < 0 || win > WINDOWS_NR) 334 return; 335 336 win_data = &ctx->win_data[win]; 337 338 win_data->enabled = true; 339 340 DRM_DEBUG_KMS("dma_addr = 0x%x\n", win_data->dma_addr); 341 342 if (ctx->vblank_on) 343 schedule_work(&ctx->work); 344 } 345 346 static void vidi_win_disable(struct device *dev, int zpos) 347 { 348 struct vidi_context *ctx = get_vidi_context(dev); 349 struct vidi_win_data *win_data; 350 int win = zpos; 351 352 DRM_DEBUG_KMS("%s\n", __FILE__); 353 354 if (win == DEFAULT_ZPOS) 355 win = ctx->default_win; 356 357 if (win < 0 || win > WINDOWS_NR) 358 return; 359 360 win_data = &ctx->win_data[win]; 361 win_data->enabled = false; 362 363 /* TODO. */ 364 } 365 366 static struct exynos_drm_overlay_ops vidi_overlay_ops = { 367 .mode_set = vidi_win_mode_set, 368 .commit = vidi_win_commit, 369 .disable = vidi_win_disable, 370 }; 371 372 static struct exynos_drm_manager vidi_manager = { 373 .pipe = -1, 374 .ops = &vidi_manager_ops, 375 .overlay_ops = &vidi_overlay_ops, 376 .display_ops = &vidi_display_ops, 377 }; 378 379 static void vidi_finish_pageflip(struct drm_device *drm_dev, int crtc) 380 { 381 struct exynos_drm_private *dev_priv = drm_dev->dev_private; 382 struct drm_pending_vblank_event *e, *t; 383 struct timeval now; 384 unsigned long flags; 385 bool is_checked = false; 386 387 spin_lock_irqsave(&drm_dev->event_lock, flags); 388 389 list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list, 390 base.link) { 391 /* if event's pipe isn't same as crtc then ignore it. */ 392 if (crtc != e->pipe) 393 continue; 394 395 is_checked = true; 396 397 do_gettimeofday(&now); 398 e->event.sequence = 0; 399 e->event.tv_sec = now.tv_sec; 400 e->event.tv_usec = now.tv_usec; 401 402 list_move_tail(&e->base.link, &e->base.file_priv->event_list); 403 wake_up_interruptible(&e->base.file_priv->event_wait); 404 } 405 406 if (is_checked) { 407 /* 408 * call drm_vblank_put only in case that drm_vblank_get was 409 * called. 410 */ 411 if (atomic_read(&drm_dev->vblank_refcount[crtc]) > 0) 412 drm_vblank_put(drm_dev, crtc); 413 414 /* 415 * don't off vblank if vblank_disable_allowed is 1, 416 * because vblank would be off by timer handler. 417 */ 418 if (!drm_dev->vblank_disable_allowed) 419 drm_vblank_off(drm_dev, crtc); 420 } 421 422 spin_unlock_irqrestore(&drm_dev->event_lock, flags); 423 } 424 425 static void vidi_fake_vblank_handler(struct work_struct *work) 426 { 427 struct vidi_context *ctx = container_of(work, struct vidi_context, 428 work); 429 struct exynos_drm_subdrv *subdrv = &ctx->subdrv; 430 struct exynos_drm_manager *manager = subdrv->manager; 431 432 if (manager->pipe < 0) 433 return; 434 435 /* refresh rate is about 50Hz. */ 436 usleep_range(16000, 20000); 437 438 mutex_lock(&ctx->lock); 439 440 if (ctx->direct_vblank) { 441 drm_handle_vblank(subdrv->drm_dev, manager->pipe); 442 ctx->direct_vblank = false; 443 mutex_unlock(&ctx->lock); 444 return; 445 } 446 447 mutex_unlock(&ctx->lock); 448 449 vidi_finish_pageflip(subdrv->drm_dev, manager->pipe); 450 } 451 452 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev) 453 { 454 DRM_DEBUG_KMS("%s\n", __FILE__); 455 456 /* 457 * enable drm irq mode. 458 * - with irq_enabled = 1, we can use the vblank feature. 459 * 460 * P.S. note that we wouldn't use drm irq handler but 461 * just specific driver own one instead because 462 * drm framework supports only one irq handler. 463 */ 464 drm_dev->irq_enabled = 1; 465 466 /* 467 * with vblank_disable_allowed = 1, vblank interrupt will be disabled 468 * by drm timer once a current process gives up ownership of 469 * vblank event.(after drm_vblank_put function is called) 470 */ 471 drm_dev->vblank_disable_allowed = 1; 472 473 return 0; 474 } 475 476 static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev) 477 { 478 DRM_DEBUG_KMS("%s\n", __FILE__); 479 480 /* TODO. */ 481 } 482 483 static int vidi_power_on(struct vidi_context *ctx, bool enable) 484 { 485 struct exynos_drm_subdrv *subdrv = &ctx->subdrv; 486 struct device *dev = subdrv->dev; 487 488 DRM_DEBUG_KMS("%s\n", __FILE__); 489 490 if (enable != false && enable != true) 491 return -EINVAL; 492 493 if (enable) { 494 ctx->suspended = false; 495 496 /* if vblank was enabled status, enable it again. */ 497 if (test_and_clear_bit(0, &ctx->irq_flags)) 498 vidi_enable_vblank(dev); 499 500 vidi_apply(dev); 501 } else { 502 ctx->suspended = true; 503 } 504 505 return 0; 506 } 507 508 static int vidi_show_connection(struct device *dev, 509 struct device_attribute *attr, char *buf) 510 { 511 int rc; 512 struct vidi_context *ctx = get_vidi_context(dev); 513 514 mutex_lock(&ctx->lock); 515 516 rc = sprintf(buf, "%d\n", ctx->connected); 517 518 mutex_unlock(&ctx->lock); 519 520 return rc; 521 } 522 523 static int vidi_store_connection(struct device *dev, 524 struct device_attribute *attr, 525 const char *buf, size_t len) 526 { 527 struct vidi_context *ctx = get_vidi_context(dev); 528 int ret; 529 530 DRM_DEBUG_KMS("%s\n", __FILE__); 531 532 ret = kstrtoint(buf, 0, &ctx->connected); 533 if (ret) 534 return ret; 535 536 if (ctx->connected > 1) 537 return -EINVAL; 538 539 /* use fake edid data for test. */ 540 if (!ctx->raw_edid) 541 ctx->raw_edid = (struct edid *)fake_edid_info; 542 543 /* if raw_edid isn't same as fake data then it can't be tested. */ 544 if (ctx->raw_edid != (struct edid *)fake_edid_info) { 545 DRM_DEBUG_KMS("edid data is not fake data.\n"); 546 return -EINVAL; 547 } 548 549 DRM_DEBUG_KMS("requested connection.\n"); 550 551 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev); 552 553 return len; 554 } 555 556 static DEVICE_ATTR(connection, 0644, vidi_show_connection, 557 vidi_store_connection); 558 559 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data, 560 struct drm_file *file_priv) 561 { 562 struct vidi_context *ctx = NULL; 563 struct drm_encoder *encoder; 564 struct exynos_drm_manager *manager; 565 struct exynos_drm_display_ops *display_ops; 566 struct drm_exynos_vidi_connection *vidi = data; 567 struct edid *raw_edid; 568 int edid_len; 569 570 DRM_DEBUG_KMS("%s\n", __FILE__); 571 572 if (!vidi) { 573 DRM_DEBUG_KMS("user data for vidi is null.\n"); 574 return -EINVAL; 575 } 576 577 if (vidi->connection > 1) { 578 DRM_DEBUG_KMS("connection should be 0 or 1.\n"); 579 return -EINVAL; 580 } 581 582 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list, 583 head) { 584 manager = exynos_drm_get_manager(encoder); 585 display_ops = manager->display_ops; 586 587 if (display_ops->type == EXYNOS_DISPLAY_TYPE_VIDI) { 588 ctx = get_vidi_context(manager->dev); 589 break; 590 } 591 } 592 593 if (!ctx) { 594 DRM_DEBUG_KMS("not found virtual device type encoder.\n"); 595 return -EINVAL; 596 } 597 598 if (ctx->connected == vidi->connection) { 599 DRM_DEBUG_KMS("same connection request.\n"); 600 return -EINVAL; 601 } 602 603 if (vidi->connection) { 604 if (!vidi->edid) { 605 DRM_DEBUG_KMS("edid data is null.\n"); 606 return -EINVAL; 607 } 608 raw_edid = (struct edid *)(uint32_t)vidi->edid; 609 edid_len = (1 + raw_edid->extensions) * EDID_LENGTH; 610 ctx->raw_edid = kzalloc(edid_len, GFP_KERNEL); 611 if (!ctx->raw_edid) { 612 DRM_DEBUG_KMS("failed to allocate raw_edid.\n"); 613 return -ENOMEM; 614 } 615 memcpy(ctx->raw_edid, raw_edid, edid_len); 616 } else { 617 /* 618 * with connection = 0, free raw_edid 619 * only if raw edid data isn't same as fake data. 620 */ 621 if (ctx->raw_edid && ctx->raw_edid != 622 (struct edid *)fake_edid_info) { 623 kfree(ctx->raw_edid); 624 ctx->raw_edid = NULL; 625 } 626 } 627 628 ctx->connected = vidi->connection; 629 drm_helper_hpd_irq_event(ctx->subdrv.drm_dev); 630 631 return 0; 632 } 633 634 static int __devinit vidi_probe(struct platform_device *pdev) 635 { 636 struct device *dev = &pdev->dev; 637 struct vidi_context *ctx; 638 struct exynos_drm_subdrv *subdrv; 639 int ret; 640 641 DRM_DEBUG_KMS("%s\n", __FILE__); 642 643 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); 644 if (!ctx) 645 return -ENOMEM; 646 647 ctx->default_win = 0; 648 649 INIT_WORK(&ctx->work, vidi_fake_vblank_handler); 650 651 subdrv = &ctx->subdrv; 652 subdrv->dev = dev; 653 subdrv->manager = &vidi_manager; 654 subdrv->probe = vidi_subdrv_probe; 655 subdrv->remove = vidi_subdrv_remove; 656 657 mutex_init(&ctx->lock); 658 659 platform_set_drvdata(pdev, ctx); 660 661 ret = device_create_file(&pdev->dev, &dev_attr_connection); 662 if (ret < 0) 663 DRM_INFO("failed to create connection sysfs.\n"); 664 665 exynos_drm_subdrv_register(subdrv); 666 667 return 0; 668 } 669 670 static int __devexit vidi_remove(struct platform_device *pdev) 671 { 672 struct vidi_context *ctx = platform_get_drvdata(pdev); 673 674 DRM_DEBUG_KMS("%s\n", __FILE__); 675 676 exynos_drm_subdrv_unregister(&ctx->subdrv); 677 678 if (ctx->raw_edid != (struct edid *)fake_edid_info) { 679 kfree(ctx->raw_edid); 680 ctx->raw_edid = NULL; 681 } 682 683 return 0; 684 } 685 686 #ifdef CONFIG_PM_SLEEP 687 static int vidi_suspend(struct device *dev) 688 { 689 struct vidi_context *ctx = get_vidi_context(dev); 690 691 return vidi_power_on(ctx, false); 692 } 693 694 static int vidi_resume(struct device *dev) 695 { 696 struct vidi_context *ctx = get_vidi_context(dev); 697 698 return vidi_power_on(ctx, true); 699 } 700 #endif 701 702 static const struct dev_pm_ops vidi_pm_ops = { 703 SET_SYSTEM_SLEEP_PM_OPS(vidi_suspend, vidi_resume) 704 }; 705 706 struct platform_driver vidi_driver = { 707 .probe = vidi_probe, 708 .remove = __devexit_p(vidi_remove), 709 .driver = { 710 .name = "exynos-drm-vidi", 711 .owner = THIS_MODULE, 712 .pm = &vidi_pm_ops, 713 }, 714 }; 715