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