drivers/gpu/drm/exynos/exynos_drm_drv.c

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   3  * Authors:
   4  *      Inki Dae <inki.dae@samsung.com>
   5  *      Joonyoung Shim <jy0922.shim@samsung.com>
   6  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27
  28 #include "drmP.h"
  29 #include "drm.h"
  30 #include "drm_crtc_helper.h"
  31
  32 #include <drm/exynos_drm.h>
  33
  34 #include "exynos_drm_drv.h"
  35 #include "exynos_drm_crtc.h"
  36 #include "exynos_drm_encoder.h"
  37 #include "exynos_drm_fbdev.h"
  38 #include "exynos_drm_fb.h"
  39 #include "exynos_drm_gem.h"
  40 #include "exynos_drm_plane.h"
  41 #include "exynos_drm_vidi.h"
  42 #include "exynos_drm_dmabuf.h"
  43 #include "exynos_drm_display.h"
  44
  45 #define DRIVER_NAME     "exynos"
  46 #define DRIVER_DESC     "Samsung SoC DRM"
  47 #define DRIVER_DATE     "20110530"
  48 #define DRIVER_MAJOR    1
  49 #define DRIVER_MINOR    0
  50
  51 #define VBLANK_OFF_DELAY        50000
  52
  53 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
  54 {
  55         struct exynos_drm_private *private;
  56         int ret;
  57         int nr;
  58
  59         DRM_DEBUG_DRIVER("%s\n", __FILE__);
  60
  61         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
  62         if (!private) {
  63                 DRM_ERROR("failed to allocate private\n");
  64                 return -ENOMEM;
  65         }
  66
  67 #ifdef CONFIG_DMA_SHARED_BUFFER_USES_KDS
  68         if (kds_callback_init(&private->kds_cb, 1,
  69                               exynos_drm_kds_callback) < 0) {
  70                 DRM_ERROR("kds alloc queue failed.\n");
  71                 ret = -ENOMEM;
  72                 goto err_kds;
  73         }
  74 #endif
  75
  76         DRM_INIT_WAITQUEUE(&private->wait_vsync_queue);
  77
  78         dev->dev_private = (void *)private;
  79
  80         drm_mode_config_init(dev);
  81
  82         /* init kms poll for handling hpd */
  83         drm_kms_helper_poll_init(dev);
  84
  85         exynos_drm_mode_config_init(dev);
  86
  87         /*
  88          * EXYNOS4 is enough to have two CRTCs and each crtc would be used
  89          * without dependency of hardware.
  90          */
  91         for (nr = 0; nr < MAX_CRTC; nr++) {
  92                 ret = exynos_drm_crtc_create(dev, nr);
  93                 if (ret)
  94                         goto err_crtc;
  95         }
  96
  97         for (nr = 0; nr < MAX_PLANE; nr++) {
  98                 ret = exynos_plane_init(dev, nr);
  99                 if (ret)
 100                         goto err_crtc;
 101         }
 102
 103         ret = drm_vblank_init(dev, MAX_CRTC);
 104         if (ret)
 105                 goto err_crtc;
 106
 107         /*
 108          * probe sub drivers such as display controller and hdmi driver,
 109          * that were registered at probe() of platform driver
 110          * to the sub driver and create encoder and connector for them.
 111          */
 112         ret = exynos_drm_device_register(dev);
 113         if (ret)
 114                 goto err_vblank;
 115
 116         /* setup possible_clones. */
 117         exynos_drm_encoder_setup(dev);
 118
 119         /*
 120          * create and configure fb helper and also exynos specific
 121          * fbdev object.
 122          */
 123         ret = exynos_drm_fbdev_init(dev);
 124         if (ret) {
 125                 DRM_ERROR("failed to initialize drm fbdev\n");
 126                 goto err_drm_device;
 127         }
 128
 129         drm_vblank_offdelay = VBLANK_OFF_DELAY;
 130
 131         return 0;
 132
 133 err_drm_device:
 134         exynos_drm_device_unregister(dev);
 135 err_vblank:
 136         drm_vblank_cleanup(dev);
 137 err_crtc:
 138         drm_mode_config_cleanup(dev);
 139 #ifdef CONFIG_DMA_SHARED_BUFFER_USES_KDS
 140         kds_callback_term(&private->kds_cb);
 141 err_kds:
 142 #endif
 143         kfree(private);
 144
 145         return ret;
 146 }
 147
 148 static int exynos_drm_unload(struct drm_device *dev)
 149 {
 150         struct exynos_drm_private *private = dev->dev_private;
 151
 152         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 153
 154         exynos_drm_fbdev_fini(dev);
 155         exynos_drm_device_unregister(dev);
 156         drm_vblank_cleanup(dev);
 157         drm_kms_helper_poll_fini(dev);
 158         drm_mode_config_cleanup(dev);
 159 #ifdef CONFIG_DMA_SHARED_BUFFER_USES_KDS
 160         kds_callback_term(&private->kds_cb);
 161 #endif
 162         kfree(private);
 163
 164         dev->dev_private = NULL;
 165
 166         return 0;
 167 }
 168
 169 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 170 {
 171         struct exynos_drm_file_private *file_private;
 172
 173         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 174
 175         file_private = kzalloc(sizeof(*file_private), GFP_KERNEL);
 176         if (!file_private) {
 177                 DRM_ERROR("failed to allocate exynos_drm_file_private\n");
 178                 return -ENOMEM;
 179         }
 180         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
 181
 182         file->driver_priv = file_private;
 183
 184         return exynos_drm_subdrv_open(dev, file);
 185 }
 186
 187 static void exynos_drm_preclose(struct drm_device *dev,
 188                                         struct drm_file *file)
 189 {
 190         struct exynos_drm_file_private *file_private = file->driver_priv;
 191         struct exynos_drm_gem_obj_node *cur, *d;
 192
 193         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 194
 195         mutex_lock(&dev->struct_mutex);
 196         /* release kds resource sets for outstanding GEM object acquires */
 197         list_for_each_entry_safe(cur, d,
 198                         &file_private->gem_cpu_acquire_list, list) {
 199 #ifdef CONFIG_DMA_SHARED_BUFFER_USES_KDS
 200                 BUG_ON(cur->exynos_gem_obj->resource_set == NULL);
 201                 kds_resource_set_release(&cur->exynos_gem_obj->resource_set);
 202 #endif
 203                 drm_gem_object_unreference(&cur->exynos_gem_obj->base);
 204                 kfree(cur);
 205         }
 206         mutex_unlock(&dev->struct_mutex);
 207         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
 208
 209         exynos_drm_subdrv_close(dev, file);
 210 }
 211
 212 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
 213 {
 214         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 215
 216         if (!file->driver_priv)
 217                 return;
 218
 219         kfree(file->driver_priv);
 220         file->driver_priv = NULL;
 221 }
 222
 223 static void exynos_drm_lastclose(struct drm_device *dev)
 224 {
 225         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 226
 227         exynos_drm_fbdev_restore_mode(dev);
 228 }
 229
 230 static struct vm_operations_struct exynos_drm_gem_vm_ops = {
 231         .fault = exynos_drm_gem_fault,
 232         .open = drm_gem_vm_open,
 233         .close = drm_gem_vm_close,
 234 };
 235
 236 static struct drm_ioctl_desc exynos_ioctls[] = {
 237         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 238                         DRM_UNLOCKED | DRM_AUTH),
 239         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP_OFFSET,
 240                         exynos_drm_gem_map_offset_ioctl, DRM_UNLOCKED |
 241                         DRM_AUTH),
 242         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
 243                         exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
 244         DRM_IOCTL_DEF_DRV(EXYNOS_PLANE_SET_ZPOS, exynos_plane_set_zpos_ioctl,
 245                         DRM_UNLOCKED | DRM_AUTH),
 246         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,
 247                         vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH),
 248         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CPU_ACQUIRE,
 249                         exynos_drm_gem_cpu_acquire_ioctl,
 250                         DRM_UNLOCKED | DRM_AUTH),
 251         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CPU_RELEASE,
 252                         exynos_drm_gem_cpu_release_ioctl,
 253                         DRM_UNLOCKED | DRM_AUTH),
 254 };
 255
 256 static const struct file_operations exynos_drm_driver_fops = {
 257         .owner          = THIS_MODULE,
 258         .open           = drm_open,
 259         .mmap           = exynos_drm_gem_mmap,
 260         .poll           = drm_poll,
 261         .read           = drm_read,
 262         .unlocked_ioctl = drm_ioctl,
 263         .release        = drm_release,
 264 };
 265
 266 static struct drm_driver exynos_drm_driver = {
 267         .driver_features        = DRIVER_HAVE_IRQ | DRIVER_BUS_PLATFORM |
 268                                   DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 269         .load                   = exynos_drm_load,
 270         .unload                 = exynos_drm_unload,
 271         .open                   = exynos_drm_open,
 272         .preclose               = exynos_drm_preclose,
 273         .lastclose              = exynos_drm_lastclose,
 274         .postclose              = exynos_drm_postclose,
 275         .get_vblank_counter     = drm_vblank_count,
 276         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 277         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 278 #if defined(CONFIG_DEBUG_FS)
 279         .debugfs_init           = exynos_drm_debugfs_init,
 280         .debugfs_cleanup        = exynos_drm_debugfs_cleanup,
 281 #endif
 282         .gem_free_object        = exynos_drm_gem_free_object,
 283         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 284         .dumb_create            = exynos_drm_gem_dumb_create,
 285         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 286         .dumb_destroy           = exynos_drm_gem_dumb_destroy,
 287         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 288         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 289         .gem_prime_export       = exynos_dmabuf_prime_export,
 290         .gem_prime_import       = exynos_dmabuf_prime_import,
 291         .ioctls                 = exynos_ioctls,
 292         .fops                   = &exynos_drm_driver_fops,
 293         .name   = DRIVER_NAME,
 294         .desc   = DRIVER_DESC,
 295         .date   = DRIVER_DATE,
 296         .major  = DRIVER_MAJOR,
 297         .minor  = DRIVER_MINOR,
 298 };
 299
 300 #ifdef CONFIG_EXYNOS_IOMMU
 301 static int iommu_init(struct platform_device *pdev)
 302 {
 303         /* DRM device expects a IOMMU mapping to be already
 304          * created in FIMD. Else this function should
 305          * throw an error.
 306          */
 307         if (exynos_drm_common_mapping==NULL) {
 308                 printk(KERN_ERR "exynos drm common mapping is invalid\n");
 309                 return -1;
 310         }
 311
 312         /*
 313          * The ordering in Makefile warrants that this is initialized after
 314          * FIMD, so only just ensure that it works as expected and we are
 315          * reusing the mapping originally created in exynos_drm_fimd.c.
 316          */
 317         WARN_ON(!exynos_drm_common_mapping);
 318         if (!s5p_create_iommu_mapping(&pdev->dev, 0,
 319                                 0, 0, exynos_drm_common_mapping)) {
 320                 printk(KERN_ERR "failed to create IOMMU mapping\n");
 321                 return -1;
 322         }
 323
 324         return 0;
 325 }
 326
 327 static void iommu_deinit(struct platform_device *pdev)
 328 {
 329         /* detach the device and mapping */
 330         s5p_destroy_iommu_mapping(&pdev->dev);
 331         DRM_DEBUG("released the IOMMU mapping\n");
 332
 333         return;
 334 }
 335 #endif
 336
 337 static int exynos_drm_platform_probe(struct platform_device *pdev)
 338 {
 339         struct device *dev = &pdev->dev;
 340
 341         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 342
 343 #ifdef CONFIG_EXYNOS_IOMMU
 344         if (iommu_init(pdev)) {
 345                 DRM_ERROR("failed to initialize IOMMU\n");
 346                 return -ENODEV;
 347         }
 348 #endif
 349
 350         exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);
 351
 352         pm_runtime_enable(dev);
 353         pm_runtime_get_sync(dev);
 354
 355         return drm_platform_init(&exynos_drm_driver, pdev);
 356 }
 357
 358 static int __devexit exynos_drm_platform_remove(struct platform_device *pdev)
 359 {
 360         struct device *dev = &pdev->dev;
 361
 362         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 363
 364         pm_runtime_disable(dev);
 365
 366         drm_platform_exit(&exynos_drm_driver, pdev);
 367
 368 #ifdef CONFIG_EXYNOS_IOMMU
 369         iommu_deinit(pdev);
 370 #endif
 371         return 0;
 372 }
 373
 374 /* TODO (seanpaul): Once we remove platform drivers, we'll be calling the
 375  * various panel/controller init functions directly. These init functions will
 376  * return to us the ops and context, so we can get rid of these attach
 377  * functions. Once the attach functions are gone, we can move this array of
 378  * display pointers into the drm device's platform data.
 379  *
 380  * For now, we'll use a global to keep track of things.
 381  */
 382 static struct exynos_drm_display *displays[EXYNOS_DRM_DISPLAY_NUM_DISPLAYS];
 383
 384 void exynos_display_attach_panel(enum exynos_drm_display_type type,
 385                 struct exynos_panel_ops *ops, void *ctx)
 386 {
 387         int i;
 388         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 389                 if (displays[i]->display_type == type) {
 390                         displays[i]->panel_ctx = ctx;
 391                         displays[i]->panel_ops = ops;
 392                         return;
 393                 }
 394         }
 395 }
 396
 397 void exynos_display_attach_controller(enum exynos_drm_display_type type,
 398                 struct exynos_controller_ops *ops, void *ctx)
 399 {
 400         int i;
 401         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 402                 if (displays[i]->display_type == type) {
 403                         displays[i]->controller_ctx = ctx;
 404                         displays[i]->controller_ops = ops;
 405                         return;
 406                 }
 407         }
 408 }
 409
 410 static int display_subdrv_probe(struct drm_device *drm_dev,
 411                 struct exynos_drm_subdrv *subdrv)
 412 {
 413         struct exynos_drm_display *display = subdrv->display;
 414         int ret;
 415
 416         if (!display->controller_ops || !display->panel_ops)
 417                 return -EINVAL;
 418
 419         if (display->controller_ops->subdrv_probe) {
 420                 ret = display->controller_ops->subdrv_probe(
 421                                 display->controller_ctx, drm_dev);
 422                 if (ret)
 423                         return ret;
 424         }
 425
 426         if (display->panel_ops->subdrv_probe) {
 427                 ret = display->panel_ops->subdrv_probe(display->panel_ctx,
 428                                 drm_dev);
 429                 if (ret)
 430                         return ret;
 431         }
 432
 433         return 0;
 434 }
 435
 436 int exynos_display_init(struct exynos_drm_display *display,
 437                 enum exynos_drm_display_type type)
 438 {
 439         struct exynos_drm_subdrv *subdrv;
 440
 441         subdrv = kzalloc(sizeof(*subdrv), GFP_KERNEL);
 442         if (!subdrv) {
 443                 DRM_ERROR("Failed to allocate display subdrv\n");
 444                 return -ENOMEM;
 445         }
 446
 447         display->display_type = type;
 448         display->pipe = -1;
 449         display->subdrv = subdrv;
 450
 451         subdrv->probe = display_subdrv_probe;
 452         subdrv->display = display;
 453         exynos_drm_subdrv_register(subdrv);
 454
 455         return 0;
 456 }
 457
 458 void exynos_display_remove(struct exynos_drm_display *display)
 459 {
 460         if (display->subdrv) {
 461                 exynos_drm_subdrv_unregister(display->subdrv);
 462                 kfree(display->subdrv);
 463         }
 464 }
 465
 466 static int exynos_drm_resume_displays(void)
 467 {
 468         int i;
 469
 470         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 471                 struct exynos_drm_display *display = displays[i];
 472                 struct drm_encoder *encoder = display->subdrv->encoder;
 473
 474                 if (!encoder)
 475                         continue;
 476
 477                 exynos_drm_encoder_dpms(encoder, display->suspend_dpms);
 478         }
 479         return 0;
 480 }
 481
 482 static int exynos_drm_suspend_displays(void)
 483 {
 484         int i;
 485
 486         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 487                 struct exynos_drm_display *display = displays[i];
 488                 struct drm_encoder *encoder = display->subdrv->encoder;
 489
 490                 if (!encoder)
 491                         continue;
 492
 493                 display->suspend_dpms = exynos_drm_encoder_get_dpms(encoder);
 494                 exynos_drm_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
 495         }
 496         return 0;
 497 }
 498
 499 #ifdef CONFIG_PM_SLEEP
 500 static int exynos_drm_suspend(struct device *dev)
 501 {
 502         if (pm_runtime_suspended(dev))
 503                 return 0;
 504
 505         return exynos_drm_suspend_displays();
 506 }
 507
 508 static int exynos_drm_resume(struct device *dev)
 509 {
 510         if (pm_runtime_suspended(dev))
 511                 return 0;
 512
 513         return exynos_drm_resume_displays();
 514 }
 515 #endif
 516
 517 #ifdef CONFIG_PM_RUNTIME
 518 static int exynos_drm_runtime_resume(struct device *dev)
 519 {
 520         return exynos_drm_resume_displays();
 521 }
 522
 523 static int exynos_drm_runtime_suspend(struct device *dev)
 524 {
 525         return exynos_drm_suspend_displays();
 526 }
 527 #endif
 528
 529 static const struct dev_pm_ops drm_pm_ops = {
 530         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 531         SET_RUNTIME_PM_OPS(exynos_drm_runtime_suspend,
 532                         exynos_drm_runtime_resume, NULL)
 533 };
 534
 535 static struct platform_driver exynos_drm_platform_driver = {
 536         .probe          = exynos_drm_platform_probe,
 537         .remove         = __devexit_p(exynos_drm_platform_remove),
 538         .driver         = {
 539                 .owner  = THIS_MODULE,
 540                 .name   = "exynos-drm",
 541                 .pm     = &drm_pm_ops,
 542         },
 543 };
 544
 545 static int __init exynos_drm_init(void)
 546 {
 547         int ret, i;
 548
 549         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 550
 551         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 552                 displays[i] = kzalloc(sizeof(*displays[i]), GFP_KERNEL);
 553                 if (!displays[i]) {
 554                         ret = -ENOMEM;
 555                         goto out_display;
 556                 }
 557
 558                 ret = exynos_display_init(displays[i], i);
 559                 if (ret)
 560                         goto out_display;
 561         }
 562
 563 #ifdef CONFIG_DRM_EXYNOS_FIMD
 564         ret = platform_driver_register(&fimd_driver);
 565         if (ret < 0)
 566                 goto out_fimd;
 567 #endif
 568
 569 #ifdef CONFIG_DRM_EXYNOS_DP
 570         ret = platform_driver_register(&dp_driver);
 571         if (ret < 0)
 572                 goto out_dp_driver;
 573 #endif
 574
 575 #ifdef CONFIG_DRM_EXYNOS_HDMI
 576         ret = platform_driver_register(&hdmi_driver);
 577         if (ret < 0)
 578                 goto out_hdmi;
 579         ret = platform_driver_register(&mixer_driver);
 580         if (ret < 0)
 581                 goto out_mixer;
 582 #endif
 583
 584 #ifdef CONFIG_DRM_EXYNOS_VIDI
 585         ret = platform_driver_register(&vidi_driver);
 586         if (ret < 0)
 587                 goto out_vidi;
 588 #endif
 589
 590         ret = platform_driver_register(&exynos_drm_platform_driver);
 591         if (ret < 0)
 592                 goto out;
 593
 594         return 0;
 595
 596 out:
 597 #ifdef CONFIG_DRM_EXYNOS_VIDI
 598 out_vidi:
 599         platform_driver_unregister(&vidi_driver);
 600 #endif
 601
 602 #ifdef CONFIG_DRM_EXYNOS_HDMI
 603         platform_driver_unregister(&mixer_driver);
 604 out_mixer:
 605         platform_driver_unregister(&hdmi_driver);
 606 out_hdmi:
 607 #endif
 608
 609         platform_driver_unregister(&dp_driver);
 610 out_dp_driver:
 611 #ifdef CONFIG_DRM_EXYNOS_FIMD
 612         platform_driver_unregister(&fimd_driver);
 613 out_fimd:
 614 #endif
 615 out_display:
 616         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 617                 if (!displays[i])
 618                         continue;
 619
 620                 exynos_display_remove(displays[i]);
 621                 kfree(displays[i]);
 622         }
 623         return ret;
 624 }
 625
 626 static void __exit exynos_drm_exit(void)
 627 {
 628         int i;
 629
 630         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 631
 632         platform_driver_unregister(&exynos_drm_platform_driver);
 633
 634 #ifdef CONFIG_DRM_EXYNOS_HDMI
 635         platform_driver_unregister(&mixer_driver);
 636         platform_driver_unregister(&hdmi_driver);
 637 #endif
 638
 639 #ifdef CONFIG_DRM_EXYNOS_VIDI
 640         platform_driver_unregister(&vidi_driver);
 641 #endif
 642
 643         platform_driver_unregister(&dp_driver);
 644 #ifdef CONFIG_DRM_EXYNOS_FIMD
 645         platform_driver_unregister(&fimd_driver);
 646 #endif
 647
 648         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 649                 if (!displays[i])
 650                         continue;
 651
 652                 exynos_display_remove(displays[i]);
 653                 kfree(displays[i]);
 654         }
 655 }
 656
 657 module_init(exynos_drm_init);
 658 module_exit(exynos_drm_exit);
 659
 660 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 661 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 662 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 663 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 664 MODULE_LICENSE("GPL");