kernel/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  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/pm_runtime.h>
  15 #include <drm/drmP.h>
  16 #include <drm/drm_crtc_helper.h>
  17
  18 #include <linux/component.h>
  19
  20 #include <drm/exynos_drm.h>
  21
  22 #include "exynos_drm_drv.h"
  23 #include "exynos_drm_crtc.h"
  24 #include "exynos_drm_encoder.h"
  25 #include "exynos_drm_fbdev.h"
  26 #include "exynos_drm_fb.h"
  27 #include "exynos_drm_gem.h"
  28 #include "exynos_drm_plane.h"
  29 #include "exynos_drm_vidi.h"
  30 #include "exynos_drm_dmabuf.h"
  31 #include "exynos_drm_g2d.h"
  32 #include "exynos_drm_ipp.h"
  33 #include "exynos_drm_iommu.h"
  34
  35 #define DRIVER_NAME     "exynos"
  36 #define DRIVER_DESC     "Samsung SoC DRM"
  37 #define DRIVER_DATE     "20110530"
  38 #define DRIVER_MAJOR    1
  39 #define DRIVER_MINOR    0
  40
  41 static struct platform_device *exynos_drm_pdev;
  42
  43 static DEFINE_MUTEX(drm_component_lock);
  44 static LIST_HEAD(drm_component_list);
  45
  46 struct component_dev {
  47         struct list_head list;
  48         struct device *crtc_dev;
  49         struct device *conn_dev;
  50         enum exynos_drm_output_type out_type;
  51         unsigned int dev_type_flag;
  52 };
  53
  54 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
  55 {
  56         struct exynos_drm_private *private;
  57         int ret;
  58
  59         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
  60         if (!private)
  61                 return -ENOMEM;
  62
  63         dev_set_drvdata(dev->dev, dev);
  64         dev->dev_private = (void *)private;
  65
  66         /*
  67          * create mapping to manage iommu table and set a pointer to iommu
  68          * mapping structure to iommu_mapping of private data.
  69          * also this iommu_mapping can be used to check if iommu is supported
  70          * or not.
  71          */
  72         ret = drm_create_iommu_mapping(dev);
  73         if (ret < 0) {
  74                 DRM_ERROR("failed to create iommu mapping.\n");
  75                 goto err_free_private;
  76         }
  77
  78         drm_mode_config_init(dev);
  79
  80         exynos_drm_mode_config_init(dev);
  81
  82         /* setup possible_clones. */
  83         exynos_drm_encoder_setup(dev);
  84
  85         platform_set_drvdata(dev->platformdev, dev);
  86
  87         /* Try to bind all sub drivers. */
  88         ret = component_bind_all(dev->dev, dev);
  89         if (ret)
  90                 goto err_mode_config_cleanup;
  91
  92         ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
  93         if (ret)
  94                 goto err_unbind_all;
  95
  96         /* Probe non kms sub drivers and virtual display driver. */
  97         ret = exynos_drm_device_subdrv_probe(dev);
  98         if (ret)
  99                 goto err_cleanup_vblank;
 100
 101         /*
 102          * enable drm irq mode.
 103          * - with irq_enabled = true, we can use the vblank feature.
 104          *
 105          * P.S. note that we wouldn't use drm irq handler but
 106          *      just specific driver own one instead because
 107          *      drm framework supports only one irq handler.
 108          */
 109         dev->irq_enabled = true;
 110
 111         /*
 112          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 113          * by drm timer once a current process gives up ownership of
 114          * vblank event.(after drm_vblank_put function is called)
 115          */
 116         dev->vblank_disable_allowed = true;
 117
 118         /* init kms poll for handling hpd */
 119         drm_kms_helper_poll_init(dev);
 120
 121         /* force connectors detection */
 122         drm_helper_hpd_irq_event(dev);
 123
 124         return 0;
 125
 126 err_cleanup_vblank:
 127         drm_vblank_cleanup(dev);
 128 err_unbind_all:
 129         component_unbind_all(dev->dev, dev);
 130 err_mode_config_cleanup:
 131         drm_mode_config_cleanup(dev);
 132         drm_release_iommu_mapping(dev);
 133 err_free_private:
 134         kfree(private);
 135
 136         return ret;
 137 }
 138
 139 static int exynos_drm_unload(struct drm_device *dev)
 140 {
 141         exynos_drm_device_subdrv_remove(dev);
 142
 143         exynos_drm_fbdev_fini(dev);
 144         drm_kms_helper_poll_fini(dev);
 145
 146         drm_vblank_cleanup(dev);
 147         component_unbind_all(dev->dev, dev);
 148         drm_mode_config_cleanup(dev);
 149         drm_release_iommu_mapping(dev);
 150
 151         kfree(dev->dev_private);
 152         dev->dev_private = NULL;
 153
 154         return 0;
 155 }
 156
 157 static int exynos_drm_suspend(struct drm_device *dev, pm_message_t state)
 158 {
 159         struct drm_connector *connector;
 160
 161         drm_modeset_lock_all(dev);
 162         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 163                 int old_dpms = connector->dpms;
 164
 165                 if (connector->funcs->dpms)
 166                         connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
 167
 168                 /* Set the old mode back to the connector for resume */
 169                 connector->dpms = old_dpms;
 170         }
 171         drm_modeset_unlock_all(dev);
 172
 173         return 0;
 174 }
 175
 176 static int exynos_drm_resume(struct drm_device *dev)
 177 {
 178         struct drm_connector *connector;
 179
 180         drm_modeset_lock_all(dev);
 181         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 182                 if (connector->funcs->dpms) {
 183                         int dpms = connector->dpms;
 184
 185                         connector->dpms = DRM_MODE_DPMS_OFF;
 186                         connector->funcs->dpms(connector, dpms);
 187                 }
 188         }
 189         drm_modeset_unlock_all(dev);
 190
 191         return 0;
 192 }
 193
 194 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 195 {
 196         struct drm_exynos_file_private *file_priv;
 197         int ret;
 198
 199         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
 200         if (!file_priv)
 201                 return -ENOMEM;
 202
 203         file->driver_priv = file_priv;
 204
 205         ret = exynos_drm_subdrv_open(dev, file);
 206         if (ret)
 207                 goto err_file_priv_free;
 208
 209         return ret;
 210
 211 err_file_priv_free:
 212         kfree(file_priv);
 213         file->driver_priv = NULL;
 214         return ret;
 215 }
 216
 217 static void exynos_drm_preclose(struct drm_device *dev,
 218                                         struct drm_file *file)
 219 {
 220         exynos_drm_subdrv_close(dev, file);
 221 }
 222
 223 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
 224 {
 225         struct drm_pending_event *e, *et;
 226         unsigned long flags;
 227
 228         if (!file->driver_priv)
 229                 return;
 230
 231         spin_lock_irqsave(&dev->event_lock, flags);
 232         /* Release all events handled by page flip handler but not freed. */
 233         list_for_each_entry_safe(e, et, &file->event_list, link) {
 234                 list_del(&e->link);
 235                 e->destroy(e);
 236         }
 237         spin_unlock_irqrestore(&dev->event_lock, flags);
 238
 239         kfree(file->driver_priv);
 240         file->driver_priv = NULL;
 241 }
 242
 243 static void exynos_drm_lastclose(struct drm_device *dev)
 244 {
 245         exynos_drm_fbdev_restore_mode(dev);
 246 }
 247
 248 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
 249         .fault = exynos_drm_gem_fault,
 250         .open = drm_gem_vm_open,
 251         .close = drm_gem_vm_close,
 252 };
 253
 254 static const struct drm_ioctl_desc exynos_ioctls[] = {
 255         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 256                         DRM_UNLOCKED | DRM_AUTH),
 257         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET,
 258                         exynos_drm_gem_get_ioctl, DRM_UNLOCKED),
 259         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,
 260                         vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH),
 261         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER,
 262                         exynos_g2d_get_ver_ioctl, DRM_UNLOCKED | DRM_AUTH),
 263         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST,
 264                         exynos_g2d_set_cmdlist_ioctl, DRM_UNLOCKED | DRM_AUTH),
 265         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC,
 266                         exynos_g2d_exec_ioctl, DRM_UNLOCKED | DRM_AUTH),
 267         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY,
 268                         exynos_drm_ipp_get_property, DRM_UNLOCKED | DRM_AUTH),
 269         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY,
 270                         exynos_drm_ipp_set_property, DRM_UNLOCKED | DRM_AUTH),
 271         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF,
 272                         exynos_drm_ipp_queue_buf, DRM_UNLOCKED | DRM_AUTH),
 273         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL,
 274                         exynos_drm_ipp_cmd_ctrl, DRM_UNLOCKED | DRM_AUTH),
 275 };
 276
 277 static const struct file_operations exynos_drm_driver_fops = {
 278         .owner          = THIS_MODULE,
 279         .open           = drm_open,
 280         .mmap           = exynos_drm_gem_mmap,
 281         .poll           = drm_poll,
 282         .read           = drm_read,
 283         .unlocked_ioctl = drm_ioctl,
 284 #ifdef CONFIG_COMPAT
 285         .compat_ioctl = drm_compat_ioctl,
 286 #endif
 287         .release        = drm_release,
 288 };
 289
 290 static struct drm_driver exynos_drm_driver = {
 291         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 292         .load                   = exynos_drm_load,
 293         .unload                 = exynos_drm_unload,
 294         .suspend                = exynos_drm_suspend,
 295         .resume                 = exynos_drm_resume,
 296         .open                   = exynos_drm_open,
 297         .preclose               = exynos_drm_preclose,
 298         .lastclose              = exynos_drm_lastclose,
 299         .postclose              = exynos_drm_postclose,
 300         .set_busid              = drm_platform_set_busid,
 301         .get_vblank_counter     = drm_vblank_count,
 302         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 303         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 304         .gem_free_object        = exynos_drm_gem_free_object,
 305         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 306         .dumb_create            = exynos_drm_gem_dumb_create,
 307         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 308         .dumb_destroy           = drm_gem_dumb_destroy,
 309         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 310         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 311         .gem_prime_export       = exynos_dmabuf_prime_export,
 312         .gem_prime_import       = exynos_dmabuf_prime_import,
 313         .ioctls                 = exynos_ioctls,
 314         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 315         .fops                   = &exynos_drm_driver_fops,
 316         .name   = DRIVER_NAME,
 317         .desc   = DRIVER_DESC,
 318         .date   = DRIVER_DATE,
 319         .major  = DRIVER_MAJOR,
 320         .minor  = DRIVER_MINOR,
 321 };
 322
 323 #ifdef CONFIG_PM_SLEEP
 324 static int exynos_drm_sys_suspend(struct device *dev)
 325 {
 326         struct drm_device *drm_dev = dev_get_drvdata(dev);
 327         pm_message_t message;
 328
 329         if (pm_runtime_suspended(dev) || !drm_dev)
 330                 return 0;
 331
 332         message.event = PM_EVENT_SUSPEND;
 333         return exynos_drm_suspend(drm_dev, message);
 334 }
 335
 336 static int exynos_drm_sys_resume(struct device *dev)
 337 {
 338         struct drm_device *drm_dev = dev_get_drvdata(dev);
 339
 340         if (pm_runtime_suspended(dev) || !drm_dev)
 341                 return 0;
 342
 343         return exynos_drm_resume(drm_dev);
 344 }
 345 #endif
 346
 347 static const struct dev_pm_ops exynos_drm_pm_ops = {
 348         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_sys_suspend, exynos_drm_sys_resume)
 349 };
 350
 351 int exynos_drm_component_add(struct device *dev,
 352                                 enum exynos_drm_device_type dev_type,
 353                                 enum exynos_drm_output_type out_type)
 354 {
 355         struct component_dev *cdev;
 356
 357         if (dev_type != EXYNOS_DEVICE_TYPE_CRTC &&
 358                         dev_type != EXYNOS_DEVICE_TYPE_CONNECTOR) {
 359                 DRM_ERROR("invalid device type.\n");
 360                 return -EINVAL;
 361         }
 362
 363         mutex_lock(&drm_component_lock);
 364
 365         /*
 366          * Make sure to check if there is a component which has two device
 367          * objects, for connector and for encoder/connector.
 368          * It should make sure that crtc and encoder/connector drivers are
 369          * ready before exynos drm core binds them.
 370          */
 371         list_for_each_entry(cdev, &drm_component_list, list) {
 372                 if (cdev->out_type == out_type) {
 373                         /*
 374                          * If crtc and encoder/connector device objects are
 375                          * added already just return.
 376                          */
 377                         if (cdev->dev_type_flag == (EXYNOS_DEVICE_TYPE_CRTC |
 378                                                 EXYNOS_DEVICE_TYPE_CONNECTOR)) {
 379                                 mutex_unlock(&drm_component_lock);
 380                                 return 0;
 381                         }
 382
 383                         if (dev_type == EXYNOS_DEVICE_TYPE_CRTC) {
 384                                 cdev->crtc_dev = dev;
 385                                 cdev->dev_type_flag |= dev_type;
 386                         }
 387
 388                         if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR) {
 389                                 cdev->conn_dev = dev;
 390                                 cdev->dev_type_flag |= dev_type;
 391                         }
 392
 393                         mutex_unlock(&drm_component_lock);
 394                         return 0;
 395                 }
 396         }
 397
 398         mutex_unlock(&drm_component_lock);
 399
 400         cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
 401         if (!cdev)
 402                 return -ENOMEM;
 403
 404         if (dev_type == EXYNOS_DEVICE_TYPE_CRTC)
 405                 cdev->crtc_dev = dev;
 406         if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR)
 407                 cdev->conn_dev = dev;
 408
 409         cdev->out_type = out_type;
 410         cdev->dev_type_flag = dev_type;
 411
 412         mutex_lock(&drm_component_lock);
 413         list_add_tail(&cdev->list, &drm_component_list);
 414         mutex_unlock(&drm_component_lock);
 415
 416         return 0;
 417 }
 418
 419 void exynos_drm_component_del(struct device *dev,
 420                                 enum exynos_drm_device_type dev_type)
 421 {
 422         struct component_dev *cdev, *next;
 423
 424         mutex_lock(&drm_component_lock);
 425
 426         list_for_each_entry_safe(cdev, next, &drm_component_list, list) {
 427                 if (dev_type == EXYNOS_DEVICE_TYPE_CRTC) {
 428                         if (cdev->crtc_dev == dev) {
 429                                 cdev->crtc_dev = NULL;
 430                                 cdev->dev_type_flag &= ~dev_type;
 431                         }
 432                 }
 433
 434                 if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR) {
 435                         if (cdev->conn_dev == dev) {
 436                                 cdev->conn_dev = NULL;
 437                                 cdev->dev_type_flag &= ~dev_type;
 438                         }
 439                 }
 440
 441                 /*
 442                  * Release cdev object only in case that both of crtc and
 443                  * encoder/connector device objects are NULL.
 444                  */
 445                 if (!cdev->crtc_dev && !cdev->conn_dev) {
 446                         list_del(&cdev->list);
 447                         kfree(cdev);
 448                 }
 449         }
 450
 451         mutex_unlock(&drm_component_lock);
 452 }
 453
 454 static int compare_dev(struct device *dev, void *data)
 455 {
 456         return dev == (struct device *)data;
 457 }
 458
 459 static struct component_match *exynos_drm_match_add(struct device *dev)
 460 {
 461         struct component_match *match = NULL;
 462         struct component_dev *cdev;
 463         unsigned int attach_cnt = 0;
 464
 465         mutex_lock(&drm_component_lock);
 466
 467         /* Do not retry to probe if there is no any kms driver regitered. */
 468         if (list_empty(&drm_component_list)) {
 469                 mutex_unlock(&drm_component_lock);
 470                 return ERR_PTR(-ENODEV);
 471         }
 472
 473         list_for_each_entry(cdev, &drm_component_list, list) {
 474                 /*
 475                  * Add components to master only in case that crtc and
 476                  * encoder/connector device objects exist.
 477                  */
 478                 if (!cdev->crtc_dev || !cdev->conn_dev)
 479                         continue;
 480
 481                 attach_cnt++;
 482
 483                 mutex_unlock(&drm_component_lock);
 484
 485                 /*
 486                  * fimd and dpi modules have same device object so add
 487                  * only crtc device object in this case.
 488                  */
 489                 if (cdev->crtc_dev == cdev->conn_dev) {
 490                         component_match_add(dev, &match, compare_dev,
 491                                                 cdev->crtc_dev);
 492                         goto out_lock;
 493                 }
 494
 495                 /*
 496                  * Do not chage below call order.
 497                  * crtc device first should be added to master because
 498                  * connector/encoder need pipe number of crtc when they
 499                  * are created.
 500                  */
 501                 component_match_add(dev, &match, compare_dev, cdev->crtc_dev);
 502                 component_match_add(dev, &match, compare_dev, cdev->conn_dev);
 503
 504 out_lock:
 505                 mutex_lock(&drm_component_lock);
 506         }
 507
 508         mutex_unlock(&drm_component_lock);
 509
 510         return attach_cnt ? match : ERR_PTR(-EPROBE_DEFER);
 511 }
 512
 513 static int exynos_drm_bind(struct device *dev)
 514 {
 515         return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
 516 }
 517
 518 static void exynos_drm_unbind(struct device *dev)
 519 {
 520         drm_put_dev(dev_get_drvdata(dev));
 521 }
 522
 523 static const struct component_master_ops exynos_drm_ops = {
 524         .bind           = exynos_drm_bind,
 525         .unbind         = exynos_drm_unbind,
 526 };
 527
 528 static struct platform_driver *const exynos_drm_kms_drivers[] = {
 529 #ifdef CONFIG_DRM_EXYNOS_FIMD
 530         &fimd_driver,
 531 #endif
 532 #ifdef CONFIG_DRM_EXYNOS7_DECON
 533         &decon_driver,
 534 #endif
 535 #ifdef CONFIG_DRM_EXYNOS_DP
 536         &dp_driver,
 537 #endif
 538 #ifdef CONFIG_DRM_EXYNOS_DSI
 539         &dsi_driver,
 540 #endif
 541 #ifdef CONFIG_DRM_EXYNOS_HDMI
 542         &mixer_driver,
 543         &hdmi_driver,
 544 #endif
 545 };
 546
 547 static struct platform_driver *const exynos_drm_non_kms_drivers[] = {
 548 #ifdef CONFIG_DRM_EXYNOS_G2D
 549         &g2d_driver,
 550 #endif
 551 #ifdef CONFIG_DRM_EXYNOS_FIMC
 552         &fimc_driver,
 553 #endif
 554 #ifdef CONFIG_DRM_EXYNOS_ROTATOR
 555         &rotator_driver,
 556 #endif
 557 #ifdef CONFIG_DRM_EXYNOS_GSC
 558         &gsc_driver,
 559 #endif
 560 #ifdef CONFIG_DRM_EXYNOS_IPP
 561         &ipp_driver,
 562 #endif
 563 };
 564
 565 static int exynos_drm_platform_probe(struct platform_device *pdev)
 566 {
 567         struct component_match *match;
 568
 569         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 570         exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
 571
 572         match = exynos_drm_match_add(&pdev->dev);
 573         if (IS_ERR(match)) {
 574                 return PTR_ERR(match);
 575         }
 576
 577         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 578                                                match);
 579 }
 580
 581 static int exynos_drm_platform_remove(struct platform_device *pdev)
 582 {
 583         component_master_del(&pdev->dev, &exynos_drm_ops);
 584         return 0;
 585 }
 586
 587 static const char * const strings[] = {
 588         "samsung,exynos3",
 589         "samsung,exynos4",
 590         "samsung,exynos5",
 591         "samsung,exynos7",
 592 };
 593
 594 static struct platform_driver exynos_drm_platform_driver = {
 595         .probe  = exynos_drm_platform_probe,
 596         .remove = exynos_drm_platform_remove,
 597         .driver = {
 598                 .name   = "exynos-drm",
 599                 .pm     = &exynos_drm_pm_ops,
 600         },
 601 };
 602
 603 static int exynos_drm_init(void)
 604 {
 605         bool is_exynos = false;
 606         int ret, i, j;
 607
 608         /*
 609          * Register device object only in case of Exynos SoC.
 610          *
 611          * Below codes resolves temporarily infinite loop issue incurred
 612          * by Exynos drm driver when using multi-platform kernel.
 613          * So these codes will be replaced with more generic way later.
 614          */
 615         for (i = 0; i < ARRAY_SIZE(strings); i++) {
 616                 if (of_machine_is_compatible(strings[i])) {
 617                         is_exynos = true;
 618                         break;
 619                 }
 620         }
 621
 622         if (!is_exynos)
 623                 return -ENODEV;
 624
 625         exynos_drm_pdev = platform_device_register_simple("exynos-drm", -1,
 626                                                                 NULL, 0);
 627         if (IS_ERR(exynos_drm_pdev))
 628                 return PTR_ERR(exynos_drm_pdev);
 629
 630         ret = exynos_drm_probe_vidi();
 631         if (ret < 0)
 632                 goto err_unregister_pd;
 633
 634         for (i = 0; i < ARRAY_SIZE(exynos_drm_kms_drivers); ++i) {
 635                 ret = platform_driver_register(exynos_drm_kms_drivers[i]);
 636                 if (ret < 0)
 637                         goto err_unregister_kms_drivers;
 638         }
 639
 640         for (j = 0; j < ARRAY_SIZE(exynos_drm_non_kms_drivers); ++j) {
 641                 ret = platform_driver_register(exynos_drm_non_kms_drivers[j]);
 642                 if (ret < 0)
 643                         goto err_unregister_non_kms_drivers;
 644         }
 645
 646 #ifdef CONFIG_DRM_EXYNOS_IPP
 647         ret = exynos_platform_device_ipp_register();
 648         if (ret < 0)
 649                 goto err_unregister_non_kms_drivers;
 650 #endif
 651
 652         ret = platform_driver_register(&exynos_drm_platform_driver);
 653         if (ret)
 654                 goto err_unregister_resources;
 655
 656         return 0;
 657
 658 err_unregister_resources:
 659 #ifdef CONFIG_DRM_EXYNOS_IPP
 660         exynos_platform_device_ipp_unregister();
 661 #endif
 662
 663 err_unregister_non_kms_drivers:
 664         while (--j >= 0)
 665                 platform_driver_unregister(exynos_drm_non_kms_drivers[j]);
 666
 667 err_unregister_kms_drivers:
 668         while (--i >= 0)
 669                 platform_driver_unregister(exynos_drm_kms_drivers[i]);
 670
 671         exynos_drm_remove_vidi();
 672
 673 err_unregister_pd:
 674         platform_device_unregister(exynos_drm_pdev);
 675
 676         return ret;
 677 }
 678
 679 static void exynos_drm_exit(void)
 680 {
 681         int i;
 682
 683 #ifdef CONFIG_DRM_EXYNOS_IPP
 684         exynos_platform_device_ipp_unregister();
 685 #endif
 686
 687         for (i = ARRAY_SIZE(exynos_drm_non_kms_drivers) - 1; i >= 0; --i)
 688                 platform_driver_unregister(exynos_drm_non_kms_drivers[i]);
 689
 690         for (i = ARRAY_SIZE(exynos_drm_kms_drivers) - 1; i >= 0; --i)
 691                 platform_driver_unregister(exynos_drm_kms_drivers[i]);
 692
 693         platform_driver_unregister(&exynos_drm_platform_driver);
 694
 695         exynos_drm_remove_vidi();
 696
 697         platform_device_unregister(exynos_drm_pdev);
 698 }
 699
 700 module_init(exynos_drm_init);
 701 module_exit(exynos_drm_exit);
 702
 703 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 704 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 705 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 706 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 707 MODULE_LICENSE("GPL");