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         int ret;
 341
 342         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 343
 344 #ifdef CONFIG_EXYNOS_IOMMU
 345         if (iommu_init(pdev)) {
 346                 DRM_ERROR("failed to initialize IOMMU\n");
 347                 return -ENODEV;
 348         }
 349 #endif
 350
 351         exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);
 352
 353         pm_vt_switch_required(dev, false);
 354         pm_runtime_enable(dev);
 355         pm_runtime_get_sync(dev);
 356
 357         ret = drm_platform_init(&exynos_drm_driver, pdev);
 358 #ifdef CONFIG_EXYNOS_IOMMU
 359         if (ret)
 360                 iommu_deinit(pdev);
 361 #endif
 362
 363         return ret;
 364 }
 365
 366 static int __devexit exynos_drm_platform_remove(struct platform_device *pdev)
 367 {
 368         struct device *dev = &pdev->dev;
 369
 370         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 371
 372         pm_vt_switch_unregister(dev);
 373         pm_runtime_disable(dev);
 374
 375         drm_platform_exit(&exynos_drm_driver, pdev);
 376
 377 #ifdef CONFIG_EXYNOS_IOMMU
 378         iommu_deinit(pdev);
 379 #endif
 380         return 0;
 381 }
 382
 383 /* TODO (seanpaul): Once we remove platform drivers, we'll be calling the
 384  * various panel/controller init functions directly. These init functions will
 385  * return to us the ops and context, so we can get rid of these attach
 386  * functions. Once the attach functions are gone, we can move this array of
 387  * display pointers into the drm device's platform data.
 388  *
 389  * For now, we'll use a global to keep track of things.
 390  */
 391 static struct exynos_drm_display *displays[EXYNOS_DRM_DISPLAY_NUM_DISPLAYS];
 392
 393 void exynos_display_attach_panel(enum exynos_drm_display_type type,
 394                 struct exynos_panel_ops *ops, void *ctx)
 395 {
 396         int i;
 397         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 398                 if (displays[i]->display_type == type) {
 399                         displays[i]->panel_ctx = ctx;
 400                         displays[i]->panel_ops = ops;
 401                         return;
 402                 }
 403         }
 404 }
 405
 406 void exynos_display_attach_controller(enum exynos_drm_display_type type,
 407                 struct exynos_controller_ops *ops, void *ctx)
 408 {
 409         int i;
 410         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 411                 if (displays[i]->display_type == type) {
 412                         displays[i]->controller_ctx = ctx;
 413                         displays[i]->controller_ops = ops;
 414                         return;
 415                 }
 416         }
 417 }
 418
 419 static int display_subdrv_probe(struct drm_device *drm_dev,
 420                 struct exynos_drm_subdrv *subdrv)
 421 {
 422         struct exynos_drm_display *display = subdrv->display;
 423         int ret;
 424
 425         if (!display->controller_ops || !display->panel_ops)
 426                 return -EINVAL;
 427
 428         if (display->controller_ops->subdrv_probe) {
 429                 ret = display->controller_ops->subdrv_probe(
 430                                 display->controller_ctx, drm_dev);
 431                 if (ret)
 432                         return ret;
 433         }
 434
 435         if (display->panel_ops->subdrv_probe) {
 436                 ret = display->panel_ops->subdrv_probe(display->panel_ctx,
 437                                 drm_dev);
 438                 if (ret)
 439                         return ret;
 440         }
 441
 442         return 0;
 443 }
 444
 445 int exynos_display_init(struct exynos_drm_display *display,
 446                 enum exynos_drm_display_type type)
 447 {
 448         struct exynos_drm_subdrv *subdrv;
 449
 450         subdrv = kzalloc(sizeof(*subdrv), GFP_KERNEL);
 451         if (!subdrv) {
 452                 DRM_ERROR("Failed to allocate display subdrv\n");
 453                 return -ENOMEM;
 454         }
 455
 456         display->display_type = type;
 457         display->pipe = -1;
 458         display->subdrv = subdrv;
 459
 460         subdrv->probe = display_subdrv_probe;
 461         subdrv->display = display;
 462         exynos_drm_subdrv_register(subdrv);
 463
 464         return 0;
 465 }
 466
 467 void exynos_display_remove(struct exynos_drm_display *display)
 468 {
 469         if (display->subdrv) {
 470                 exynos_drm_subdrv_unregister(display->subdrv);
 471                 kfree(display->subdrv);
 472         }
 473 }
 474
 475 static int exynos_drm_resume_displays(void)
 476 {
 477         int i;
 478
 479         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 480                 struct exynos_drm_display *display = displays[i];
 481                 struct drm_encoder *encoder = display->subdrv->encoder;
 482
 483                 if (!encoder)
 484                         continue;
 485
 486                 exynos_drm_encoder_dpms(encoder, display->suspend_dpms);
 487         }
 488         return 0;
 489 }
 490
 491 static int exynos_drm_suspend_displays(void)
 492 {
 493         int i;
 494
 495         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 496                 struct exynos_drm_display *display = displays[i];
 497                 struct drm_encoder *encoder = display->subdrv->encoder;
 498
 499                 if (!encoder)
 500                         continue;
 501
 502                 display->suspend_dpms = exynos_drm_encoder_get_dpms(encoder);
 503                 exynos_drm_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
 504         }
 505         return 0;
 506 }
 507
 508 #ifdef CONFIG_PM_SLEEP
 509 static int exynos_drm_suspend(struct device *dev)
 510 {
 511         if (pm_runtime_suspended(dev))
 512                 return 0;
 513
 514         return exynos_drm_suspend_displays();
 515 }
 516
 517 static int exynos_drm_resume(struct device *dev)
 518 {
 519         if (pm_runtime_suspended(dev))
 520                 return 0;
 521
 522         return exynos_drm_resume_displays();
 523 }
 524 #endif
 525
 526 #ifdef CONFIG_PM_RUNTIME
 527 static int exynos_drm_runtime_resume(struct device *dev)
 528 {
 529         return exynos_drm_resume_displays();
 530 }
 531
 532 static int exynos_drm_runtime_suspend(struct device *dev)
 533 {
 534         return exynos_drm_suspend_displays();
 535 }
 536 #endif
 537
 538 static const struct dev_pm_ops drm_pm_ops = {
 539         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 540         SET_RUNTIME_PM_OPS(exynos_drm_runtime_suspend,
 541                         exynos_drm_runtime_resume, NULL)
 542 };
 543
 544 static struct platform_driver exynos_drm_platform_driver = {
 545         .probe          = exynos_drm_platform_probe,
 546         .remove         = __devexit_p(exynos_drm_platform_remove),
 547         .driver         = {
 548                 .owner  = THIS_MODULE,
 549                 .name   = "exynos-drm",
 550                 .pm     = &drm_pm_ops,
 551         },
 552 };
 553
 554 static int __init exynos_drm_init(void)
 555 {
 556         int ret, i;
 557
 558         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 559
 560         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 561                 displays[i] = kzalloc(sizeof(*displays[i]), GFP_KERNEL);
 562                 if (!displays[i]) {
 563                         ret = -ENOMEM;
 564                         goto out_display;
 565                 }
 566
 567                 ret = exynos_display_init(displays[i], i);
 568                 if (ret)
 569                         goto out_display;
 570         }
 571
 572 #ifdef CONFIG_DRM_EXYNOS_FIMD
 573         ret = platform_driver_register(&fimd_driver);
 574         if (ret < 0)
 575                 goto out_fimd;
 576 #endif
 577
 578 #ifdef CONFIG_DRM_EXYNOS_DP
 579         ret = platform_driver_register(&dp_driver);
 580         if (ret < 0)
 581                 goto out_dp_driver;
 582 #endif
 583
 584 #ifdef CONFIG_DRM_EXYNOS_HDMI
 585         ret = platform_driver_register(&hdmi_driver);
 586         if (ret < 0)
 587                 goto out_hdmi;
 588         ret = platform_driver_register(&mixer_driver);
 589         if (ret < 0)
 590                 goto out_mixer;
 591 #endif
 592
 593 #ifdef CONFIG_DRM_EXYNOS_VIDI
 594         ret = platform_driver_register(&vidi_driver);
 595         if (ret < 0)
 596                 goto out_vidi;
 597 #endif
 598
 599         ret = platform_driver_register(&exynos_drm_platform_driver);
 600         if (ret < 0)
 601                 goto out;
 602
 603         return 0;
 604
 605 out:
 606 #ifdef CONFIG_DRM_EXYNOS_VIDI
 607 out_vidi:
 608         platform_driver_unregister(&vidi_driver);
 609 #endif
 610
 611 #ifdef CONFIG_DRM_EXYNOS_HDMI
 612         platform_driver_unregister(&mixer_driver);
 613 out_mixer:
 614         platform_driver_unregister(&hdmi_driver);
 615 out_hdmi:
 616 #endif
 617
 618         platform_driver_unregister(&dp_driver);
 619 out_dp_driver:
 620 #ifdef CONFIG_DRM_EXYNOS_FIMD
 621         platform_driver_unregister(&fimd_driver);
 622 out_fimd:
 623 #endif
 624 out_display:
 625         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 626                 if (!displays[i])
 627                         continue;
 628
 629                 exynos_display_remove(displays[i]);
 630                 kfree(displays[i]);
 631         }
 632         return ret;
 633 }
 634
 635 static void __exit exynos_drm_exit(void)
 636 {
 637         int i;
 638
 639         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 640
 641         platform_driver_unregister(&exynos_drm_platform_driver);
 642
 643 #ifdef CONFIG_DRM_EXYNOS_HDMI
 644         platform_driver_unregister(&mixer_driver);
 645         platform_driver_unregister(&hdmi_driver);
 646 #endif
 647
 648 #ifdef CONFIG_DRM_EXYNOS_VIDI
 649         platform_driver_unregister(&vidi_driver);
 650 #endif
 651
 652         platform_driver_unregister(&dp_driver);
 653 #ifdef CONFIG_DRM_EXYNOS_FIMD
 654         platform_driver_unregister(&fimd_driver);
 655 #endif
 656
 657         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 658                 if (!displays[i])
 659                         continue;
 660
 661                 exynos_display_remove(displays[i]);
 662                 kfree(displays[i]);
 663         }
 664 }
 665
 666 module_init(exynos_drm_init);
 667 module_exit(exynos_drm_exit);
 668
 669 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 670 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 671 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 672 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 673 MODULE_LICENSE("GPL");