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         INIT_LIST_HEAD(&private->pageflip_event_list);
  64         dev_set_drvdata(dev->dev, dev);
  65         dev->dev_private = (void *)private;
  66
  67         /*
  68          * create mapping to manage iommu table and set a pointer to iommu
  69          * mapping structure to iommu_mapping of private data.
  70          * also this iommu_mapping can be used to check if iommu is supported
  71          * or not.
  72          */
  73         ret = drm_create_iommu_mapping(dev);
  74         if (ret < 0) {
  75                 DRM_ERROR("failed to create iommu mapping.\n");
  76                 goto err_free_private;
  77         }
  78
  79         drm_mode_config_init(dev);
  80
  81         exynos_drm_mode_config_init(dev);
  82
  83         /* setup possible_clones. */
  84         exynos_drm_encoder_setup(dev);
  85
  86         platform_set_drvdata(dev->platformdev, dev);
  87
  88         /* Try to bind all sub drivers. */
  89         ret = component_bind_all(dev->dev, dev);
  90         if (ret)
  91                 goto err_mode_config_cleanup;
  92
  93         ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
  94         if (ret)
  95                 goto err_unbind_all;
  96
  97         /* Probe non kms sub drivers and virtual display driver. */
  98         ret = exynos_drm_device_subdrv_probe(dev);
  99         if (ret)
 100                 goto err_cleanup_vblank;
 101
 102         /*
 103          * enable drm irq mode.
 104          * - with irq_enabled = true, we can use the vblank feature.
 105          *
 106          * P.S. note that we wouldn't use drm irq handler but
 107          *      just specific driver own one instead because
 108          *      drm framework supports only one irq handler.
 109          */
 110         dev->irq_enabled = true;
 111
 112         /*
 113          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 114          * by drm timer once a current process gives up ownership of
 115          * vblank event.(after drm_vblank_put function is called)
 116          */
 117         dev->vblank_disable_allowed = true;
 118
 119         /* init kms poll for handling hpd */
 120         drm_kms_helper_poll_init(dev);
 121
 122         /* force connectors detection */
 123         drm_helper_hpd_irq_event(dev);
 124
 125         return 0;
 126
 127 err_cleanup_vblank:
 128         drm_vblank_cleanup(dev);
 129 err_unbind_all:
 130         component_unbind_all(dev->dev, dev);
 131 err_mode_config_cleanup:
 132         drm_mode_config_cleanup(dev);
 133         drm_release_iommu_mapping(dev);
 134 err_free_private:
 135         kfree(private);
 136
 137         return ret;
 138 }
 139
 140 static int exynos_drm_unload(struct drm_device *dev)
 141 {
 142         exynos_drm_device_subdrv_remove(dev);
 143
 144         exynos_drm_fbdev_fini(dev);
 145         drm_kms_helper_poll_fini(dev);
 146
 147         drm_vblank_cleanup(dev);
 148         component_unbind_all(dev->dev, dev);
 149         drm_mode_config_cleanup(dev);
 150         drm_release_iommu_mapping(dev);
 151
 152         kfree(dev->dev_private);
 153         dev->dev_private = NULL;
 154
 155         return 0;
 156 }
 157
 158 static int exynos_drm_suspend(struct drm_device *dev, pm_message_t state)
 159 {
 160         struct drm_connector *connector;
 161
 162         drm_modeset_lock_all(dev);
 163         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 164                 int old_dpms = connector->dpms;
 165
 166                 if (connector->funcs->dpms)
 167                         connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
 168
 169                 /* Set the old mode back to the connector for resume */
 170                 connector->dpms = old_dpms;
 171         }
 172         drm_modeset_unlock_all(dev);
 173
 174         return 0;
 175 }
 176
 177 static int exynos_drm_resume(struct drm_device *dev)
 178 {
 179         struct drm_connector *connector;
 180
 181         drm_modeset_lock_all(dev);
 182         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 183                 if (connector->funcs->dpms) {
 184                         int dpms = connector->dpms;
 185
 186                         connector->dpms = DRM_MODE_DPMS_OFF;
 187                         connector->funcs->dpms(connector, dpms);
 188                 }
 189         }
 190         drm_modeset_unlock_all(dev);
 191
 192         return 0;
 193 }
 194
 195 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 196 {
 197         struct drm_exynos_file_private *file_priv;
 198         int ret;
 199
 200         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
 201         if (!file_priv)
 202                 return -ENOMEM;
 203
 204         file->driver_priv = file_priv;
 205
 206         ret = exynos_drm_subdrv_open(dev, file);
 207         if (ret)
 208                 goto err_file_priv_free;
 209
 210         return ret;
 211
 212 err_file_priv_free:
 213         kfree(file_priv);
 214         file->driver_priv = NULL;
 215         return ret;
 216 }
 217
 218 static void exynos_drm_preclose(struct drm_device *dev,
 219                                         struct drm_file *file)
 220 {
 221         exynos_drm_subdrv_close(dev, file);
 222 }
 223
 224 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
 225 {
 226         struct exynos_drm_private *private = dev->dev_private;
 227         struct drm_pending_vblank_event *v, *vt;
 228         struct drm_pending_event *e, *et;
 229         unsigned long flags;
 230
 231         if (!file->driver_priv)
 232                 return;
 233
 234         /* Release all events not unhandled by page flip handler. */
 235         spin_lock_irqsave(&dev->event_lock, flags);
 236         list_for_each_entry_safe(v, vt, &private->pageflip_event_list,
 237                         base.link) {
 238                 if (v->base.file_priv == file) {
 239                         list_del(&v->base.link);
 240                         drm_vblank_put(dev, v->pipe);
 241                         v->base.destroy(&v->base);
 242                 }
 243         }
 244
 245         /* Release all events handled by page flip handler but not freed. */
 246         list_for_each_entry_safe(e, et, &file->event_list, link) {
 247                 list_del(&e->link);
 248                 e->destroy(e);
 249         }
 250         spin_unlock_irqrestore(&dev->event_lock, flags);
 251
 252         kfree(file->driver_priv);
 253         file->driver_priv = NULL;
 254 }
 255
 256 static void exynos_drm_lastclose(struct drm_device *dev)
 257 {
 258         exynos_drm_fbdev_restore_mode(dev);
 259 }
 260
 261 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
 262         .fault = exynos_drm_gem_fault,
 263         .open = drm_gem_vm_open,
 264         .close = drm_gem_vm_close,
 265 };
 266
 267 static const struct drm_ioctl_desc exynos_ioctls[] = {
 268         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 269                         DRM_UNLOCKED | DRM_AUTH),
 270         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET,
 271                         exynos_drm_gem_get_ioctl, DRM_UNLOCKED),
 272         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,
 273                         vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH),
 274         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER,
 275                         exynos_g2d_get_ver_ioctl, DRM_UNLOCKED | DRM_AUTH),
 276         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST,
 277                         exynos_g2d_set_cmdlist_ioctl, DRM_UNLOCKED | DRM_AUTH),
 278         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC,
 279                         exynos_g2d_exec_ioctl, DRM_UNLOCKED | DRM_AUTH),
 280         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY,
 281                         exynos_drm_ipp_get_property, DRM_UNLOCKED | DRM_AUTH),
 282         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY,
 283                         exynos_drm_ipp_set_property, DRM_UNLOCKED | DRM_AUTH),
 284         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF,
 285                         exynos_drm_ipp_queue_buf, DRM_UNLOCKED | DRM_AUTH),
 286         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL,
 287                         exynos_drm_ipp_cmd_ctrl, DRM_UNLOCKED | DRM_AUTH),
 288 };
 289
 290 static const struct file_operations exynos_drm_driver_fops = {
 291         .owner          = THIS_MODULE,
 292         .open           = drm_open,
 293         .mmap           = exynos_drm_gem_mmap,
 294         .poll           = drm_poll,
 295         .read           = drm_read,
 296         .unlocked_ioctl = drm_ioctl,
 297 #ifdef CONFIG_COMPAT
 298         .compat_ioctl = drm_compat_ioctl,
 299 #endif
 300         .release        = drm_release,
 301 };
 302
 303 static struct drm_driver exynos_drm_driver = {
 304         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 305         .load                   = exynos_drm_load,
 306         .unload                 = exynos_drm_unload,
 307         .suspend                = exynos_drm_suspend,
 308         .resume                 = exynos_drm_resume,
 309         .open                   = exynos_drm_open,
 310         .preclose               = exynos_drm_preclose,
 311         .lastclose              = exynos_drm_lastclose,
 312         .postclose              = exynos_drm_postclose,
 313         .set_busid              = drm_platform_set_busid,
 314         .get_vblank_counter     = drm_vblank_count,
 315         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 316         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 317         .gem_free_object        = exynos_drm_gem_free_object,
 318         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 319         .dumb_create            = exynos_drm_gem_dumb_create,
 320         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 321         .dumb_destroy           = drm_gem_dumb_destroy,
 322         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 323         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 324         .gem_prime_export       = exynos_dmabuf_prime_export,
 325         .gem_prime_import       = exynos_dmabuf_prime_import,
 326         .ioctls                 = exynos_ioctls,
 327         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 328         .fops                   = &exynos_drm_driver_fops,
 329         .name   = DRIVER_NAME,
 330         .desc   = DRIVER_DESC,
 331         .date   = DRIVER_DATE,
 332         .major  = DRIVER_MAJOR,
 333         .minor  = DRIVER_MINOR,
 334 };
 335
 336 #ifdef CONFIG_PM_SLEEP
 337 static int exynos_drm_sys_suspend(struct device *dev)
 338 {
 339         struct drm_device *drm_dev = dev_get_drvdata(dev);
 340         pm_message_t message;
 341
 342         if (pm_runtime_suspended(dev) || !drm_dev)
 343                 return 0;
 344
 345         message.event = PM_EVENT_SUSPEND;
 346         return exynos_drm_suspend(drm_dev, message);
 347 }
 348
 349 static int exynos_drm_sys_resume(struct device *dev)
 350 {
 351         struct drm_device *drm_dev = dev_get_drvdata(dev);
 352
 353         if (pm_runtime_suspended(dev) || !drm_dev)
 354                 return 0;
 355
 356         return exynos_drm_resume(drm_dev);
 357 }
 358 #endif
 359
 360 static const struct dev_pm_ops exynos_drm_pm_ops = {
 361         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_sys_suspend, exynos_drm_sys_resume)
 362 };
 363
 364 int exynos_drm_component_add(struct device *dev,
 365                                 enum exynos_drm_device_type dev_type,
 366                                 enum exynos_drm_output_type out_type)
 367 {
 368         struct component_dev *cdev;
 369
 370         if (dev_type != EXYNOS_DEVICE_TYPE_CRTC &&
 371                         dev_type != EXYNOS_DEVICE_TYPE_CONNECTOR) {
 372                 DRM_ERROR("invalid device type.\n");
 373                 return -EINVAL;
 374         }
 375
 376         mutex_lock(&drm_component_lock);
 377
 378         /*
 379          * Make sure to check if there is a component which has two device
 380          * objects, for connector and for encoder/connector.
 381          * It should make sure that crtc and encoder/connector drivers are
 382          * ready before exynos drm core binds them.
 383          */
 384         list_for_each_entry(cdev, &drm_component_list, list) {
 385                 if (cdev->out_type == out_type) {
 386                         /*
 387                          * If crtc and encoder/connector device objects are
 388                          * added already just return.
 389                          */
 390                         if (cdev->dev_type_flag == (EXYNOS_DEVICE_TYPE_CRTC |
 391                                                 EXYNOS_DEVICE_TYPE_CONNECTOR)) {
 392                                 mutex_unlock(&drm_component_lock);
 393                                 return 0;
 394                         }
 395
 396                         if (dev_type == EXYNOS_DEVICE_TYPE_CRTC) {
 397                                 cdev->crtc_dev = dev;
 398                                 cdev->dev_type_flag |= dev_type;
 399                         }
 400
 401                         if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR) {
 402                                 cdev->conn_dev = dev;
 403                                 cdev->dev_type_flag |= dev_type;
 404                         }
 405
 406                         mutex_unlock(&drm_component_lock);
 407                         return 0;
 408                 }
 409         }
 410
 411         mutex_unlock(&drm_component_lock);
 412
 413         cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
 414         if (!cdev)
 415                 return -ENOMEM;
 416
 417         if (dev_type == EXYNOS_DEVICE_TYPE_CRTC)
 418                 cdev->crtc_dev = dev;
 419         if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR)
 420                 cdev->conn_dev = dev;
 421
 422         cdev->out_type = out_type;
 423         cdev->dev_type_flag = dev_type;
 424
 425         mutex_lock(&drm_component_lock);
 426         list_add_tail(&cdev->list, &drm_component_list);
 427         mutex_unlock(&drm_component_lock);
 428
 429         return 0;
 430 }
 431
 432 void exynos_drm_component_del(struct device *dev,
 433                                 enum exynos_drm_device_type dev_type)
 434 {
 435         struct component_dev *cdev, *next;
 436
 437         mutex_lock(&drm_component_lock);
 438
 439         list_for_each_entry_safe(cdev, next, &drm_component_list, list) {
 440                 if (dev_type == EXYNOS_DEVICE_TYPE_CRTC) {
 441                         if (cdev->crtc_dev == dev) {
 442                                 cdev->crtc_dev = NULL;
 443                                 cdev->dev_type_flag &= ~dev_type;
 444                         }
 445                 }
 446
 447                 if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR) {
 448                         if (cdev->conn_dev == dev) {
 449                                 cdev->conn_dev = NULL;
 450                                 cdev->dev_type_flag &= ~dev_type;
 451                         }
 452                 }
 453
 454                 /*
 455                  * Release cdev object only in case that both of crtc and
 456                  * encoder/connector device objects are NULL.
 457                  */
 458                 if (!cdev->crtc_dev && !cdev->conn_dev) {
 459                         list_del(&cdev->list);
 460                         kfree(cdev);
 461                 }
 462         }
 463
 464         mutex_unlock(&drm_component_lock);
 465 }
 466
 467 static int compare_dev(struct device *dev, void *data)
 468 {
 469         return dev == (struct device *)data;
 470 }
 471
 472 static struct component_match *exynos_drm_match_add(struct device *dev)
 473 {
 474         struct component_match *match = NULL;
 475         struct component_dev *cdev;
 476         unsigned int attach_cnt = 0;
 477
 478         mutex_lock(&drm_component_lock);
 479
 480         /* Do not retry to probe if there is no any kms driver regitered. */
 481         if (list_empty(&drm_component_list)) {
 482                 mutex_unlock(&drm_component_lock);
 483                 return ERR_PTR(-ENODEV);
 484         }
 485
 486         list_for_each_entry(cdev, &drm_component_list, list) {
 487                 /*
 488                  * Add components to master only in case that crtc and
 489                  * encoder/connector device objects exist.
 490                  */
 491                 if (!cdev->crtc_dev || !cdev->conn_dev)
 492                         continue;
 493
 494                 attach_cnt++;
 495
 496                 mutex_unlock(&drm_component_lock);
 497
 498                 /*
 499                  * fimd and dpi modules have same device object so add
 500                  * only crtc device object in this case.
 501                  */
 502                 if (cdev->crtc_dev == cdev->conn_dev) {
 503                         component_match_add(dev, &match, compare_dev,
 504                                                 cdev->crtc_dev);
 505                         goto out_lock;
 506                 }
 507
 508                 /*
 509                  * Do not chage below call order.
 510                  * crtc device first should be added to master because
 511                  * connector/encoder need pipe number of crtc when they
 512                  * are created.
 513                  */
 514                 component_match_add(dev, &match, compare_dev, cdev->crtc_dev);
 515                 component_match_add(dev, &match, compare_dev, cdev->conn_dev);
 516
 517 out_lock:
 518                 mutex_lock(&drm_component_lock);
 519         }
 520
 521         mutex_unlock(&drm_component_lock);
 522
 523         return attach_cnt ? match : ERR_PTR(-EPROBE_DEFER);
 524 }
 525
 526 static int exynos_drm_bind(struct device *dev)
 527 {
 528         return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
 529 }
 530
 531 static void exynos_drm_unbind(struct device *dev)
 532 {
 533         drm_put_dev(dev_get_drvdata(dev));
 534 }
 535
 536 static const struct component_master_ops exynos_drm_ops = {
 537         .bind           = exynos_drm_bind,
 538         .unbind         = exynos_drm_unbind,
 539 };
 540
 541 static struct platform_driver *const exynos_drm_kms_drivers[] = {
 542 #ifdef CONFIG_DRM_EXYNOS_FIMD
 543         &fimd_driver,
 544 #endif
 545 #ifdef CONFIG_DRM_EXYNOS7_DECON
 546         &decon_driver,
 547 #endif
 548 #ifdef CONFIG_DRM_EXYNOS_DP
 549         &dp_driver,
 550 #endif
 551 #ifdef CONFIG_DRM_EXYNOS_DSI
 552         &dsi_driver,
 553 #endif
 554 #ifdef CONFIG_DRM_EXYNOS_HDMI
 555         &mixer_driver,
 556         &hdmi_driver,
 557 #endif
 558 };
 559
 560 static struct platform_driver *const exynos_drm_non_kms_drivers[] = {
 561 #ifdef CONFIG_DRM_EXYNOS_G2D
 562         &g2d_driver,
 563 #endif
 564 #ifdef CONFIG_DRM_EXYNOS_FIMC
 565         &fimc_driver,
 566 #endif
 567 #ifdef CONFIG_DRM_EXYNOS_ROTATOR
 568         &rotator_driver,
 569 #endif
 570 #ifdef CONFIG_DRM_EXYNOS_GSC
 571         &gsc_driver,
 572 #endif
 573 #ifdef CONFIG_DRM_EXYNOS_IPP
 574         &ipp_driver,
 575 #endif
 576 };
 577
 578 static int exynos_drm_platform_probe(struct platform_device *pdev)
 579 {
 580         struct component_match *match;
 581
 582         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 583         exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
 584
 585         match = exynos_drm_match_add(&pdev->dev);
 586         if (IS_ERR(match)) {
 587                 return PTR_ERR(match);
 588         }
 589
 590         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 591                                                match);
 592 }
 593
 594 static int exynos_drm_platform_remove(struct platform_device *pdev)
 595 {
 596         component_master_del(&pdev->dev, &exynos_drm_ops);
 597         return 0;
 598 }
 599
 600 static const char * const strings[] = {
 601         "samsung,exynos3",
 602         "samsung,exynos4",
 603         "samsung,exynos5",
 604         "samsung,exynos7",
 605 };
 606
 607 static struct platform_driver exynos_drm_platform_driver = {
 608         .probe  = exynos_drm_platform_probe,
 609         .remove = exynos_drm_platform_remove,
 610         .driver = {
 611                 .name   = "exynos-drm",
 612                 .pm     = &exynos_drm_pm_ops,
 613         },
 614 };
 615
 616 static int exynos_drm_init(void)
 617 {
 618         bool is_exynos = false;
 619         int ret, i, j;
 620
 621         /*
 622          * Register device object only in case of Exynos SoC.
 623          *
 624          * Below codes resolves temporarily infinite loop issue incurred
 625          * by Exynos drm driver when using multi-platform kernel.
 626          * So these codes will be replaced with more generic way later.
 627          */
 628         for (i = 0; i < ARRAY_SIZE(strings); i++) {
 629                 if (of_machine_is_compatible(strings[i])) {
 630                         is_exynos = true;
 631                         break;
 632                 }
 633         }
 634
 635         if (!is_exynos)
 636                 return -ENODEV;
 637
 638         exynos_drm_pdev = platform_device_register_simple("exynos-drm", -1,
 639                                                                 NULL, 0);
 640         if (IS_ERR(exynos_drm_pdev))
 641                 return PTR_ERR(exynos_drm_pdev);
 642
 643         ret = exynos_drm_probe_vidi();
 644         if (ret < 0)
 645                 goto err_unregister_pd;
 646
 647         for (i = 0; i < ARRAY_SIZE(exynos_drm_kms_drivers); ++i) {
 648                 ret = platform_driver_register(exynos_drm_kms_drivers[i]);
 649                 if (ret < 0)
 650                         goto err_unregister_kms_drivers;
 651         }
 652
 653         for (j = 0; j < ARRAY_SIZE(exynos_drm_non_kms_drivers); ++j) {
 654                 ret = platform_driver_register(exynos_drm_non_kms_drivers[j]);
 655                 if (ret < 0)
 656                         goto err_unregister_non_kms_drivers;
 657         }
 658
 659 #ifdef CONFIG_DRM_EXYNOS_IPP
 660         ret = exynos_platform_device_ipp_register();
 661         if (ret < 0)
 662                 goto err_unregister_non_kms_drivers;
 663 #endif
 664
 665         ret = platform_driver_register(&exynos_drm_platform_driver);
 666         if (ret)
 667                 goto err_unregister_resources;
 668
 669         return 0;
 670
 671 err_unregister_resources:
 672 #ifdef CONFIG_DRM_EXYNOS_IPP
 673         exynos_platform_device_ipp_unregister();
 674 #endif
 675
 676 err_unregister_non_kms_drivers:
 677         while (--j >= 0)
 678                 platform_driver_unregister(exynos_drm_non_kms_drivers[j]);
 679
 680 err_unregister_kms_drivers:
 681         while (--i >= 0)
 682                 platform_driver_unregister(exynos_drm_kms_drivers[i]);
 683
 684         exynos_drm_remove_vidi();
 685
 686 err_unregister_pd:
 687         platform_device_unregister(exynos_drm_pdev);
 688
 689         return ret;
 690 }
 691
 692 static void exynos_drm_exit(void)
 693 {
 694         int i;
 695
 696 #ifdef CONFIG_DRM_EXYNOS_IPP
 697         exynos_platform_device_ipp_unregister();
 698 #endif
 699
 700         for (i = ARRAY_SIZE(exynos_drm_non_kms_drivers) - 1; i >= 0; --i)
 701                 platform_driver_unregister(exynos_drm_non_kms_drivers[i]);
 702
 703         for (i = ARRAY_SIZE(exynos_drm_kms_drivers) - 1; i >= 0; --i)
 704                 platform_driver_unregister(exynos_drm_kms_drivers[i]);
 705
 706         platform_driver_unregister(&exynos_drm_platform_driver);
 707
 708         exynos_drm_remove_vidi();
 709
 710         platform_device_unregister(exynos_drm_pdev);
 711 }
 712
 713 module_init(exynos_drm_init);
 714 module_exit(exynos_drm_exit);
 715
 716 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 717 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 718 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 719 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 720 MODULE_LICENSE("GPL");