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 /* TODO (seanpaul): Once we remove platform drivers, we'll be calling the
  54  * various panel/controller init functions directly. These init functions will
  55  * return to us the ops and context, so we can get rid of these attach
  56  * functions. Once the attach functions are gone, we can move this array of
  57  * display pointers into the drm device's platform data.
  58  *
  59  * For now, we'll use a global to keep track of things.
  60  */
  61 static struct exynos_drm_display *displays[EXYNOS_DRM_DISPLAY_NUM_DISPLAYS];
  62
  63 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
  64 {
  65         struct exynos_drm_private *private;
  66         int ret;
  67         int nr;
  68
  69         DRM_DEBUG_DRIVER("%s\n", __FILE__);
  70
  71         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
  72         if (!private) {
  73                 DRM_ERROR("failed to allocate private\n");
  74                 return -ENOMEM;
  75         }
  76
  77 #ifdef CONFIG_DMA_SHARED_BUFFER_USES_KDS
  78         if (kds_callback_init(&private->kds_cb, 1,
  79                               exynos_drm_kds_callback) < 0) {
  80                 DRM_ERROR("kds alloc queue failed.\n");
  81                 ret = -ENOMEM;
  82                 goto err_kds;
  83         }
  84 #endif
  85
  86         DRM_INIT_WAITQUEUE(&private->wait_vsync_queue);
  87
  88         dev->dev_private = (void *)private;
  89
  90         drm_mode_config_init(dev);
  91
  92         /* init kms poll for handling hpd */
  93         drm_kms_helper_poll_init(dev);
  94
  95         exynos_drm_mode_config_init(dev);
  96
  97         /*
  98          * EXYNOS4 is enough to have two CRTCs and each crtc would be used
  99          * without dependency of hardware.
 100          */
 101         for (nr = 0; nr < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; nr++) {
 102                 ret = exynos_drm_crtc_create(dev, nr, displays[nr]);
 103                 if (ret)
 104                         goto err_crtc;
 105         }
 106
 107         for (nr = 0; nr < MAX_PLANE; nr++) {
 108                 ret = exynos_plane_init(dev, nr);
 109                 if (ret)
 110                         goto err_crtc;
 111         }
 112
 113         ret = drm_vblank_init(dev, EXYNOS_DRM_DISPLAY_NUM_DISPLAYS);
 114         if (ret)
 115                 goto err_crtc;
 116
 117         /*
 118          * probe sub drivers such as display controller and hdmi driver,
 119          * that were registered at probe() of platform driver
 120          * to the sub driver and create encoder and connector for them.
 121          */
 122         ret = exynos_drm_device_register(dev);
 123         if (ret)
 124                 goto err_vblank;
 125
 126         /* setup possible_clones. */
 127         exynos_drm_encoder_setup(dev);
 128
 129         /*
 130          * create and configure fb helper and also exynos specific
 131          * fbdev object.
 132          */
 133         ret = exynos_drm_fbdev_init(dev);
 134         if (ret) {
 135                 DRM_ERROR("failed to initialize drm fbdev\n");
 136                 goto err_drm_device;
 137         }
 138
 139         drm_vblank_offdelay = VBLANK_OFF_DELAY;
 140
 141         return 0;
 142
 143 err_drm_device:
 144         exynos_drm_device_unregister(dev);
 145 err_vblank:
 146         drm_vblank_cleanup(dev);
 147 err_crtc:
 148         drm_mode_config_cleanup(dev);
 149 #ifdef CONFIG_DMA_SHARED_BUFFER_USES_KDS
 150         kds_callback_term(&private->kds_cb);
 151 err_kds:
 152 #endif
 153         kfree(private);
 154
 155         return ret;
 156 }
 157
 158 static int exynos_drm_unload(struct drm_device *dev)
 159 {
 160         struct exynos_drm_private *private = dev->dev_private;
 161
 162         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 163
 164         exynos_drm_fbdev_fini(dev);
 165         exynos_drm_device_unregister(dev);
 166         drm_vblank_cleanup(dev);
 167         drm_kms_helper_poll_fini(dev);
 168         drm_mode_config_cleanup(dev);
 169 #ifdef CONFIG_DMA_SHARED_BUFFER_USES_KDS
 170         kds_callback_term(&private->kds_cb);
 171 #endif
 172         kfree(private);
 173
 174         dev->dev_private = NULL;
 175
 176         return 0;
 177 }
 178
 179 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 180 {
 181         struct exynos_drm_file_private *file_private;
 182
 183         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 184
 185         file_private = kzalloc(sizeof(*file_private), GFP_KERNEL);
 186         if (!file_private) {
 187                 DRM_ERROR("failed to allocate exynos_drm_file_private\n");
 188                 return -ENOMEM;
 189         }
 190         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
 191
 192         file->driver_priv = file_private;
 193
 194         return exynos_drm_subdrv_open(dev, file);
 195 }
 196
 197 static void exynos_drm_preclose(struct drm_device *dev,
 198                                         struct drm_file *file)
 199 {
 200         struct exynos_drm_file_private *file_private = file->driver_priv;
 201         struct exynos_drm_gem_obj_node *cur, *d;
 202
 203         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 204
 205         mutex_lock(&dev->struct_mutex);
 206         /* release kds resource sets for outstanding GEM object acquires */
 207         list_for_each_entry_safe(cur, d,
 208                         &file_private->gem_cpu_acquire_list, list) {
 209 #ifdef CONFIG_DMA_SHARED_BUFFER_USES_KDS
 210                 BUG_ON(cur->exynos_gem_obj->resource_set == NULL);
 211                 kds_resource_set_release(&cur->exynos_gem_obj->resource_set);
 212 #endif
 213                 drm_gem_object_unreference(&cur->exynos_gem_obj->base);
 214                 kfree(cur);
 215         }
 216         mutex_unlock(&dev->struct_mutex);
 217         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
 218
 219         exynos_drm_subdrv_close(dev, file);
 220 }
 221
 222 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
 223 {
 224         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 225
 226         if (!file->driver_priv)
 227                 return;
 228
 229         kfree(file->driver_priv);
 230         file->driver_priv = NULL;
 231 }
 232
 233 static void exynos_drm_lastclose(struct drm_device *dev)
 234 {
 235         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 236
 237         exynos_drm_fbdev_restore_mode(dev);
 238 }
 239
 240 static struct vm_operations_struct exynos_drm_gem_vm_ops = {
 241         .fault = exynos_drm_gem_fault,
 242         .open = drm_gem_vm_open,
 243         .close = drm_gem_vm_close,
 244 };
 245
 246 static struct drm_ioctl_desc exynos_ioctls[] = {
 247         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 248                         DRM_UNLOCKED | DRM_AUTH),
 249         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP_OFFSET,
 250                         exynos_drm_gem_map_offset_ioctl, DRM_UNLOCKED |
 251                         DRM_AUTH),
 252         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
 253                         exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
 254         DRM_IOCTL_DEF_DRV(EXYNOS_PLANE_SET_ZPOS, exynos_plane_set_zpos_ioctl,
 255                         DRM_UNLOCKED | DRM_AUTH),
 256         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,
 257                         vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH),
 258         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CPU_ACQUIRE,
 259                         exynos_drm_gem_cpu_acquire_ioctl,
 260                         DRM_UNLOCKED | DRM_AUTH),
 261         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CPU_RELEASE,
 262                         exynos_drm_gem_cpu_release_ioctl,
 263                         DRM_UNLOCKED | DRM_AUTH),
 264 };
 265
 266 static const struct file_operations exynos_drm_driver_fops = {
 267         .owner          = THIS_MODULE,
 268         .open           = drm_open,
 269         .mmap           = exynos_drm_gem_mmap,
 270         .poll           = drm_poll,
 271         .read           = drm_read,
 272         .unlocked_ioctl = drm_ioctl,
 273         .release        = drm_release,
 274 };
 275
 276 static struct drm_driver exynos_drm_driver = {
 277         .driver_features        = DRIVER_HAVE_IRQ | DRIVER_BUS_PLATFORM |
 278                                   DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 279         .load                   = exynos_drm_load,
 280         .unload                 = exynos_drm_unload,
 281         .open                   = exynos_drm_open,
 282         .preclose               = exynos_drm_preclose,
 283         .lastclose              = exynos_drm_lastclose,
 284         .postclose              = exynos_drm_postclose,
 285         .get_vblank_counter     = drm_vblank_count,
 286         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 287         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 288 #if defined(CONFIG_DEBUG_FS)
 289         .debugfs_init           = exynos_drm_debugfs_init,
 290         .debugfs_cleanup        = exynos_drm_debugfs_cleanup,
 291 #endif
 292         .gem_free_object        = exynos_drm_gem_free_object,
 293         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 294         .dumb_create            = exynos_drm_gem_dumb_create,
 295         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 296         .dumb_destroy           = exynos_drm_gem_dumb_destroy,
 297         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 298         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 299         .gem_prime_export       = exynos_dmabuf_prime_export,
 300         .gem_prime_import       = exynos_dmabuf_prime_import,
 301         .ioctls                 = exynos_ioctls,
 302         .fops                   = &exynos_drm_driver_fops,
 303         .name   = DRIVER_NAME,
 304         .desc   = DRIVER_DESC,
 305         .date   = DRIVER_DATE,
 306         .major  = DRIVER_MAJOR,
 307         .minor  = DRIVER_MINOR,
 308 };
 309
 310 #ifdef CONFIG_EXYNOS_IOMMU
 311 static int iommu_init(struct platform_device *pdev)
 312 {
 313         /* DRM device expects a IOMMU mapping to be already
 314          * created in FIMD. Else this function should
 315          * throw an error.
 316          */
 317         if (exynos_drm_common_mapping==NULL) {
 318                 printk(KERN_ERR "exynos drm common mapping is invalid\n");
 319                 return -1;
 320         }
 321
 322         /*
 323          * The ordering in Makefile warrants that this is initialized after
 324          * FIMD, so only just ensure that it works as expected and we are
 325          * reusing the mapping originally created in exynos_drm_fimd.c.
 326          */
 327         WARN_ON(!exynos_drm_common_mapping);
 328         if (!s5p_create_iommu_mapping(&pdev->dev, 0,
 329                                 0, 0, exynos_drm_common_mapping)) {
 330                 printk(KERN_ERR "failed to create IOMMU mapping\n");
 331                 return -1;
 332         }
 333
 334         return 0;
 335 }
 336
 337 static void iommu_deinit(struct platform_device *pdev)
 338 {
 339         /* detach the device and mapping */
 340         s5p_destroy_iommu_mapping(&pdev->dev);
 341         DRM_DEBUG("released the IOMMU mapping\n");
 342
 343         return;
 344 }
 345 #endif
 346
 347 static int exynos_drm_platform_probe(struct platform_device *pdev)
 348 {
 349         struct device *dev = &pdev->dev;
 350         int ret;
 351
 352         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 353
 354 #ifdef CONFIG_EXYNOS_IOMMU
 355         if (iommu_init(pdev)) {
 356                 DRM_ERROR("failed to initialize IOMMU\n");
 357                 return -ENODEV;
 358         }
 359 #endif
 360
 361         exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);
 362
 363         pm_vt_switch_required(dev, false);
 364         pm_runtime_enable(dev);
 365         pm_runtime_get_sync(dev);
 366
 367         ret = drm_platform_init(&exynos_drm_driver, pdev);
 368 #ifdef CONFIG_EXYNOS_IOMMU
 369         if (ret)
 370                 iommu_deinit(pdev);
 371 #endif
 372
 373         return ret;
 374 }
 375
 376 static int __devexit exynos_drm_platform_remove(struct platform_device *pdev)
 377 {
 378         struct device *dev = &pdev->dev;
 379
 380         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 381
 382         pm_vt_switch_unregister(dev);
 383         pm_runtime_disable(dev);
 384
 385         drm_platform_exit(&exynos_drm_driver, pdev);
 386
 387 #ifdef CONFIG_EXYNOS_IOMMU
 388         iommu_deinit(pdev);
 389 #endif
 390         return 0;
 391 }
 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_connector *connector = display->subdrv->connector;
 482
 483                 if (!connector || !connector->funcs->dpms)
 484                         continue;
 485
 486                 connector->funcs->dpms(connector, 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_connector *connector = display->subdrv->connector;
 498
 499                 if (!connector)
 500                         continue;
 501
 502                 display->suspend_dpms = connector->dpms;
 503                 if (connector->funcs->dpms)
 504                         connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
 505         }
 506         return 0;
 507 }
 508
 509 #ifdef CONFIG_PM_SLEEP
 510 static int exynos_drm_suspend(struct device *dev)
 511 {
 512         if (pm_runtime_suspended(dev))
 513                 return 0;
 514
 515         return exynos_drm_suspend_displays();
 516 }
 517
 518 static int exynos_drm_resume(struct device *dev)
 519 {
 520         if (pm_runtime_suspended(dev))
 521                 return 0;
 522
 523         return exynos_drm_resume_displays();
 524 }
 525 #endif
 526
 527 #ifdef CONFIG_PM_RUNTIME
 528 static int exynos_drm_runtime_resume(struct device *dev)
 529 {
 530         return exynos_drm_resume_displays();
 531 }
 532
 533 static int exynos_drm_runtime_suspend(struct device *dev)
 534 {
 535         return exynos_drm_suspend_displays();
 536 }
 537 #endif
 538
 539 static const struct dev_pm_ops drm_pm_ops = {
 540         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 541         SET_RUNTIME_PM_OPS(exynos_drm_runtime_suspend,
 542                         exynos_drm_runtime_resume, NULL)
 543 };
 544
 545 static struct platform_driver exynos_drm_platform_driver = {
 546         .probe          = exynos_drm_platform_probe,
 547         .remove         = __devexit_p(exynos_drm_platform_remove),
 548         .driver         = {
 549                 .owner  = THIS_MODULE,
 550                 .name   = "exynos-drm",
 551                 .pm     = &drm_pm_ops,
 552         },
 553 };
 554
 555 static int __init exynos_drm_init(void)
 556 {
 557         int ret, i;
 558
 559         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 560
 561         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 562                 displays[i] = kzalloc(sizeof(*displays[i]), GFP_KERNEL);
 563                 if (!displays[i]) {
 564                         ret = -ENOMEM;
 565                         goto out_display;
 566                 }
 567
 568                 ret = exynos_display_init(displays[i], i);
 569                 if (ret)
 570                         goto out_display;
 571         }
 572
 573 #ifdef CONFIG_DRM_EXYNOS_FIMD
 574         ret = platform_driver_register(&fimd_driver);
 575         if (ret < 0)
 576                 goto out_fimd;
 577 #endif
 578
 579 #ifdef CONFIG_DRM_EXYNOS_DP
 580         ret = platform_driver_register(&dp_driver);
 581         if (ret < 0)
 582                 goto out_dp_driver;
 583 #endif
 584
 585 #ifdef CONFIG_DRM_EXYNOS_HDMI
 586         ret = platform_driver_register(&hdmi_driver);
 587         if (ret < 0)
 588                 goto out_hdmi;
 589         ret = platform_driver_register(&mixer_driver);
 590         if (ret < 0)
 591                 goto out_mixer;
 592 #endif
 593
 594 #ifdef CONFIG_DRM_EXYNOS_VIDI
 595         ret = platform_driver_register(&vidi_driver);
 596         if (ret < 0)
 597                 goto out_vidi;
 598 #endif
 599
 600         ret = platform_driver_register(&exynos_drm_platform_driver);
 601         if (ret < 0)
 602                 goto out;
 603
 604         return 0;
 605
 606 out:
 607 #ifdef CONFIG_DRM_EXYNOS_VIDI
 608 out_vidi:
 609         platform_driver_unregister(&vidi_driver);
 610 #endif
 611
 612 #ifdef CONFIG_DRM_EXYNOS_HDMI
 613         platform_driver_unregister(&mixer_driver);
 614 out_mixer:
 615         platform_driver_unregister(&hdmi_driver);
 616 out_hdmi:
 617 #endif
 618
 619         platform_driver_unregister(&dp_driver);
 620 out_dp_driver:
 621 #ifdef CONFIG_DRM_EXYNOS_FIMD
 622         platform_driver_unregister(&fimd_driver);
 623 out_fimd:
 624 #endif
 625 out_display:
 626         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 627                 if (!displays[i])
 628                         continue;
 629
 630                 exynos_display_remove(displays[i]);
 631                 kfree(displays[i]);
 632         }
 633         return ret;
 634 }
 635
 636 static void __exit exynos_drm_exit(void)
 637 {
 638         int i;
 639
 640         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 641
 642         platform_driver_unregister(&exynos_drm_platform_driver);
 643
 644 #ifdef CONFIG_DRM_EXYNOS_HDMI
 645         platform_driver_unregister(&mixer_driver);
 646         platform_driver_unregister(&hdmi_driver);
 647 #endif
 648
 649 #ifdef CONFIG_DRM_EXYNOS_VIDI
 650         platform_driver_unregister(&vidi_driver);
 651 #endif
 652
 653         platform_driver_unregister(&dp_driver);
 654 #ifdef CONFIG_DRM_EXYNOS_FIMD
 655         platform_driver_unregister(&fimd_driver);
 656 #endif
 657
 658         for (i = 0; i < EXYNOS_DRM_DISPLAY_NUM_DISPLAYS; i++) {
 659                 if (!displays[i])
 660                         continue;
 661
 662                 exynos_display_remove(displays[i]);
 663                 kfree(displays[i]);
 664         }
 665 }
 666
 667 module_init(exynos_drm_init);
 668 module_exit(exynos_drm_exit);
 669
 670 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 671 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 672 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 673 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 674 MODULE_LICENSE("GPL");