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         int nr;
  59
  60         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
  61         if (!private)
  62                 return -ENOMEM;
  63
  64         INIT_LIST_HEAD(&private->pageflip_event_list);
  65         dev_set_drvdata(dev->dev, dev);
  66         dev->dev_private = (void *)private;
  67
  68         /*
  69          * create mapping to manage iommu table and set a pointer to iommu
  70          * mapping structure to iommu_mapping of private data.
  71          * also this iommu_mapping can be used to check if iommu is supported
  72          * or not.
  73          */
  74         ret = drm_create_iommu_mapping(dev);
  75         if (ret < 0) {
  76                 DRM_ERROR("failed to create iommu mapping.\n");
  77                 goto err_free_private;
  78         }
  79
  80         drm_mode_config_init(dev);
  81
  82         exynos_drm_mode_config_init(dev);
  83
  84         for (nr = 0; nr < MAX_PLANE; nr++) {
  85                 struct drm_plane *plane;
  86                 unsigned long possible_crtcs = (1 << MAX_CRTC) - 1;
  87
  88                 plane = exynos_plane_init(dev, possible_crtcs,
  89                                           DRM_PLANE_TYPE_OVERLAY);
  90                 if (!IS_ERR(plane))
  91                         continue;
  92
  93                 ret = PTR_ERR(plane);
  94                 goto err_mode_config_cleanup;
  95         }
  96
  97         /* setup possible_clones. */
  98         exynos_drm_encoder_setup(dev);
  99
 100         platform_set_drvdata(dev->platformdev, dev);
 101
 102         /* Try to bind all sub drivers. */
 103         ret = component_bind_all(dev->dev, dev);
 104         if (ret)
 105                 goto err_mode_config_cleanup;
 106
 107         ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 108         if (ret)
 109                 goto err_unbind_all;
 110
 111         /*
 112          * enable drm irq mode.
 113          * - with irq_enabled = true, we can use the vblank feature.
 114          *
 115          * P.S. note that we wouldn't use drm irq handler but
 116          *      just specific driver own one instead because
 117          *      drm framework supports only one irq handler.
 118          */
 119         dev->irq_enabled = true;
 120
 121         /*
 122          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 123          * by drm timer once a current process gives up ownership of
 124          * vblank event.(after drm_vblank_put function is called)
 125          */
 126         dev->vblank_disable_allowed = true;
 127
 128         /* init kms poll for handling hpd */
 129         drm_kms_helper_poll_init(dev);
 130
 131         /* force connectors detection */
 132         drm_helper_hpd_irq_event(dev);
 133
 134         return 0;
 135
 136 err_unbind_all:
 137         component_unbind_all(dev->dev, dev);
 138 err_mode_config_cleanup:
 139         drm_mode_config_cleanup(dev);
 140         drm_release_iommu_mapping(dev);
 141 err_free_private:
 142         kfree(private);
 143
 144         return ret;
 145 }
 146
 147 static int exynos_drm_unload(struct drm_device *dev)
 148 {
 149         exynos_drm_fbdev_fini(dev);
 150         drm_kms_helper_poll_fini(dev);
 151
 152         drm_vblank_cleanup(dev);
 153         component_unbind_all(dev->dev, dev);
 154         drm_mode_config_cleanup(dev);
 155         drm_release_iommu_mapping(dev);
 156
 157         kfree(dev->dev_private);
 158         dev->dev_private = NULL;
 159
 160         return 0;
 161 }
 162
 163 static int exynos_drm_suspend(struct drm_device *dev, pm_message_t state)
 164 {
 165         struct drm_connector *connector;
 166
 167         drm_modeset_lock_all(dev);
 168         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 169                 int old_dpms = connector->dpms;
 170
 171                 if (connector->funcs->dpms)
 172                         connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
 173
 174                 /* Set the old mode back to the connector for resume */
 175                 connector->dpms = old_dpms;
 176         }
 177         drm_modeset_unlock_all(dev);
 178
 179         return 0;
 180 }
 181
 182 static int exynos_drm_resume(struct drm_device *dev)
 183 {
 184         struct drm_connector *connector;
 185
 186         drm_modeset_lock_all(dev);
 187         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 188                 if (connector->funcs->dpms) {
 189                         int dpms = connector->dpms;
 190
 191                         connector->dpms = DRM_MODE_DPMS_OFF;
 192                         connector->funcs->dpms(connector, dpms);
 193                 }
 194         }
 195         drm_modeset_unlock_all(dev);
 196
 197         drm_helper_resume_force_mode(dev);
 198
 199         return 0;
 200 }
 201
 202 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 203 {
 204         struct drm_exynos_file_private *file_priv;
 205         int ret;
 206
 207         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
 208         if (!file_priv)
 209                 return -ENOMEM;
 210
 211         file->driver_priv = file_priv;
 212
 213         ret = exynos_drm_subdrv_open(dev, file);
 214         if (ret)
 215                 goto err_file_priv_free;
 216
 217         return ret;
 218
 219 err_file_priv_free:
 220         kfree(file_priv);
 221         file->driver_priv = NULL;
 222         return ret;
 223 }
 224
 225 static void exynos_drm_preclose(struct drm_device *dev,
 226                                         struct drm_file *file)
 227 {
 228         exynos_drm_subdrv_close(dev, file);
 229 }
 230
 231 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
 232 {
 233         struct exynos_drm_private *private = dev->dev_private;
 234         struct drm_pending_vblank_event *v, *vt;
 235         struct drm_pending_event *e, *et;
 236         unsigned long flags;
 237
 238         if (!file->driver_priv)
 239                 return;
 240
 241         /* Release all events not unhandled by page flip handler. */
 242         spin_lock_irqsave(&dev->event_lock, flags);
 243         list_for_each_entry_safe(v, vt, &private->pageflip_event_list,
 244                         base.link) {
 245                 if (v->base.file_priv == file) {
 246                         list_del(&v->base.link);
 247                         drm_vblank_put(dev, v->pipe);
 248                         v->base.destroy(&v->base);
 249                 }
 250         }
 251
 252         /* Release all events handled by page flip handler but not freed. */
 253         list_for_each_entry_safe(e, et, &file->event_list, link) {
 254                 list_del(&e->link);
 255                 e->destroy(e);
 256         }
 257         spin_unlock_irqrestore(&dev->event_lock, flags);
 258
 259         kfree(file->driver_priv);
 260         file->driver_priv = NULL;
 261 }
 262
 263 static void exynos_drm_lastclose(struct drm_device *dev)
 264 {
 265         exynos_drm_fbdev_restore_mode(dev);
 266 }
 267
 268 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
 269         .fault = exynos_drm_gem_fault,
 270         .open = drm_gem_vm_open,
 271         .close = drm_gem_vm_close,
 272 };
 273
 274 static const struct drm_ioctl_desc exynos_ioctls[] = {
 275         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 276                         DRM_UNLOCKED | DRM_AUTH),
 277         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET,
 278                         exynos_drm_gem_get_ioctl, DRM_UNLOCKED),
 279         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,
 280                         vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH),
 281         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER,
 282                         exynos_g2d_get_ver_ioctl, DRM_UNLOCKED | DRM_AUTH),
 283         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST,
 284                         exynos_g2d_set_cmdlist_ioctl, DRM_UNLOCKED | DRM_AUTH),
 285         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC,
 286                         exynos_g2d_exec_ioctl, DRM_UNLOCKED | DRM_AUTH),
 287         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY,
 288                         exynos_drm_ipp_get_property, DRM_UNLOCKED | DRM_AUTH),
 289         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY,
 290                         exynos_drm_ipp_set_property, DRM_UNLOCKED | DRM_AUTH),
 291         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF,
 292                         exynos_drm_ipp_queue_buf, DRM_UNLOCKED | DRM_AUTH),
 293         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL,
 294                         exynos_drm_ipp_cmd_ctrl, DRM_UNLOCKED | DRM_AUTH),
 295 };
 296
 297 static const struct file_operations exynos_drm_driver_fops = {
 298         .owner          = THIS_MODULE,
 299         .open           = drm_open,
 300         .mmap           = exynos_drm_gem_mmap,
 301         .poll           = drm_poll,
 302         .read           = drm_read,
 303         .unlocked_ioctl = drm_ioctl,
 304 #ifdef CONFIG_COMPAT
 305         .compat_ioctl = drm_compat_ioctl,
 306 #endif
 307         .release        = drm_release,
 308 };
 309
 310 static struct drm_driver exynos_drm_driver = {
 311         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 312         .load                   = exynos_drm_load,
 313         .unload                 = exynos_drm_unload,
 314         .suspend                = exynos_drm_suspend,
 315         .resume                 = exynos_drm_resume,
 316         .open                   = exynos_drm_open,
 317         .preclose               = exynos_drm_preclose,
 318         .lastclose              = exynos_drm_lastclose,
 319         .postclose              = exynos_drm_postclose,
 320         .set_busid              = drm_platform_set_busid,
 321         .get_vblank_counter     = drm_vblank_count,
 322         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 323         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 324         .gem_free_object        = exynos_drm_gem_free_object,
 325         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 326         .dumb_create            = exynos_drm_gem_dumb_create,
 327         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 328         .dumb_destroy           = drm_gem_dumb_destroy,
 329         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 330         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 331         .gem_prime_export       = exynos_dmabuf_prime_export,
 332         .gem_prime_import       = exynos_dmabuf_prime_import,
 333         .ioctls                 = exynos_ioctls,
 334         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 335         .fops                   = &exynos_drm_driver_fops,
 336         .name   = DRIVER_NAME,
 337         .desc   = DRIVER_DESC,
 338         .date   = DRIVER_DATE,
 339         .major  = DRIVER_MAJOR,
 340         .minor  = DRIVER_MINOR,
 341 };
 342
 343 #ifdef CONFIG_PM_SLEEP
 344 static int exynos_drm_sys_suspend(struct device *dev)
 345 {
 346         struct drm_device *drm_dev = dev_get_drvdata(dev);
 347         pm_message_t message;
 348
 349         if (pm_runtime_suspended(dev) || !drm_dev)
 350                 return 0;
 351
 352         message.event = PM_EVENT_SUSPEND;
 353         return exynos_drm_suspend(drm_dev, message);
 354 }
 355
 356 static int exynos_drm_sys_resume(struct device *dev)
 357 {
 358         struct drm_device *drm_dev = dev_get_drvdata(dev);
 359
 360         if (pm_runtime_suspended(dev) || !drm_dev)
 361                 return 0;
 362
 363         return exynos_drm_resume(drm_dev);
 364 }
 365 #endif
 366
 367 static const struct dev_pm_ops exynos_drm_pm_ops = {
 368         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_sys_suspend, exynos_drm_sys_resume)
 369 };
 370
 371 int exynos_drm_component_add(struct device *dev,
 372                                 enum exynos_drm_device_type dev_type,
 373                                 enum exynos_drm_output_type out_type)
 374 {
 375         struct component_dev *cdev;
 376
 377         if (dev_type != EXYNOS_DEVICE_TYPE_CRTC &&
 378                         dev_type != EXYNOS_DEVICE_TYPE_CONNECTOR) {
 379                 DRM_ERROR("invalid device type.\n");
 380                 return -EINVAL;
 381         }
 382
 383         mutex_lock(&drm_component_lock);
 384
 385         /*
 386          * Make sure to check if there is a component which has two device
 387          * objects, for connector and for encoder/connector.
 388          * It should make sure that crtc and encoder/connector drivers are
 389          * ready before exynos drm core binds them.
 390          */
 391         list_for_each_entry(cdev, &drm_component_list, list) {
 392                 if (cdev->out_type == out_type) {
 393                         /*
 394                          * If crtc and encoder/connector device objects are
 395                          * added already just return.
 396                          */
 397                         if (cdev->dev_type_flag == (EXYNOS_DEVICE_TYPE_CRTC |
 398                                                 EXYNOS_DEVICE_TYPE_CONNECTOR)) {
 399                                 mutex_unlock(&drm_component_lock);
 400                                 return 0;
 401                         }
 402
 403                         if (dev_type == EXYNOS_DEVICE_TYPE_CRTC) {
 404                                 cdev->crtc_dev = dev;
 405                                 cdev->dev_type_flag |= dev_type;
 406                         }
 407
 408                         if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR) {
 409                                 cdev->conn_dev = dev;
 410                                 cdev->dev_type_flag |= dev_type;
 411                         }
 412
 413                         mutex_unlock(&drm_component_lock);
 414                         return 0;
 415                 }
 416         }
 417
 418         mutex_unlock(&drm_component_lock);
 419
 420         cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
 421         if (!cdev)
 422                 return -ENOMEM;
 423
 424         if (dev_type == EXYNOS_DEVICE_TYPE_CRTC)
 425                 cdev->crtc_dev = dev;
 426         if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR)
 427                 cdev->conn_dev = dev;
 428
 429         cdev->out_type = out_type;
 430         cdev->dev_type_flag = dev_type;
 431
 432         mutex_lock(&drm_component_lock);
 433         list_add_tail(&cdev->list, &drm_component_list);
 434         mutex_unlock(&drm_component_lock);
 435
 436         return 0;
 437 }
 438
 439 void exynos_drm_component_del(struct device *dev,
 440                                 enum exynos_drm_device_type dev_type)
 441 {
 442         struct component_dev *cdev, *next;
 443
 444         mutex_lock(&drm_component_lock);
 445
 446         list_for_each_entry_safe(cdev, next, &drm_component_list, list) {
 447                 if (dev_type == EXYNOS_DEVICE_TYPE_CRTC) {
 448                         if (cdev->crtc_dev == dev) {
 449                                 cdev->crtc_dev = NULL;
 450                                 cdev->dev_type_flag &= ~dev_type;
 451                         }
 452                 }
 453
 454                 if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR) {
 455                         if (cdev->conn_dev == dev) {
 456                                 cdev->conn_dev = NULL;
 457                                 cdev->dev_type_flag &= ~dev_type;
 458                         }
 459                 }
 460
 461                 /*
 462                  * Release cdev object only in case that both of crtc and
 463                  * encoder/connector device objects are NULL.
 464                  */
 465                 if (!cdev->crtc_dev && !cdev->conn_dev) {
 466                         list_del(&cdev->list);
 467                         kfree(cdev);
 468                 }
 469
 470                 break;
 471         }
 472
 473         mutex_unlock(&drm_component_lock);
 474 }
 475
 476 static int compare_dev(struct device *dev, void *data)
 477 {
 478         return dev == (struct device *)data;
 479 }
 480
 481 static struct component_match *exynos_drm_match_add(struct device *dev)
 482 {
 483         struct component_match *match = NULL;
 484         struct component_dev *cdev;
 485         unsigned int attach_cnt = 0;
 486
 487         mutex_lock(&drm_component_lock);
 488
 489         /* Do not retry to probe if there is no any kms driver regitered. */
 490         if (list_empty(&drm_component_list)) {
 491                 mutex_unlock(&drm_component_lock);
 492                 return ERR_PTR(-ENODEV);
 493         }
 494
 495         list_for_each_entry(cdev, &drm_component_list, list) {
 496                 /*
 497                  * Add components to master only in case that crtc and
 498                  * encoder/connector device objects exist.
 499                  */
 500                 if (!cdev->crtc_dev || !cdev->conn_dev)
 501                         continue;
 502
 503                 attach_cnt++;
 504
 505                 mutex_unlock(&drm_component_lock);
 506
 507                 /*
 508                  * fimd and dpi modules have same device object so add
 509                  * only crtc device object in this case.
 510                  */
 511                 if (cdev->crtc_dev == cdev->conn_dev) {
 512                         component_match_add(dev, &match, compare_dev,
 513                                                 cdev->crtc_dev);
 514                         goto out_lock;
 515                 }
 516
 517                 /*
 518                  * Do not chage below call order.
 519                  * crtc device first should be added to master because
 520                  * connector/encoder need pipe number of crtc when they
 521                  * are created.
 522                  */
 523                 component_match_add(dev, &match, compare_dev, cdev->crtc_dev);
 524                 component_match_add(dev, &match, compare_dev, cdev->conn_dev);
 525
 526 out_lock:
 527                 mutex_lock(&drm_component_lock);
 528         }
 529
 530         mutex_unlock(&drm_component_lock);
 531
 532         return attach_cnt ? match : ERR_PTR(-EPROBE_DEFER);
 533 }
 534
 535 static int exynos_drm_bind(struct device *dev)
 536 {
 537         return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
 538 }
 539
 540 static void exynos_drm_unbind(struct device *dev)
 541 {
 542         drm_put_dev(dev_get_drvdata(dev));
 543 }
 544
 545 static const struct component_master_ops exynos_drm_ops = {
 546         .bind           = exynos_drm_bind,
 547         .unbind         = exynos_drm_unbind,
 548 };
 549
 550 static struct platform_driver *const exynos_drm_kms_drivers[] = {
 551 #ifdef CONFIG_DRM_EXYNOS_FIMD
 552         &fimd_driver,
 553 #endif
 554 #ifdef CONFIG_DRM_EXYNOS_DP
 555         &dp_driver,
 556 #endif
 557 #ifdef CONFIG_DRM_EXYNOS_DSI
 558         &dsi_driver,
 559 #endif
 560 #ifdef CONFIG_DRM_EXYNOS_HDMI
 561         &mixer_driver,
 562         &hdmi_driver,
 563 #endif
 564 };
 565
 566 static struct platform_driver *const exynos_drm_non_kms_drivers[] = {
 567 #ifdef CONFIG_DRM_EXYNOS_G2D
 568         &g2d_driver,
 569 #endif
 570 #ifdef CONFIG_DRM_EXYNOS_FIMC
 571         &fimc_driver,
 572 #endif
 573 #ifdef CONFIG_DRM_EXYNOS_ROTATOR
 574         &rotator_driver,
 575 #endif
 576 #ifdef CONFIG_DRM_EXYNOS_GSC
 577         &gsc_driver,
 578 #endif
 579 #ifdef CONFIG_DRM_EXYNOS_IPP
 580         &ipp_driver,
 581 #endif
 582 };
 583
 584 static int exynos_drm_platform_probe(struct platform_device *pdev)
 585 {
 586         struct component_match *match;
 587         int ret, i, j;
 588
 589         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 590         exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
 591
 592         for (i = 0; i < ARRAY_SIZE(exynos_drm_kms_drivers); ++i) {
 593                 ret = platform_driver_register(exynos_drm_kms_drivers[i]);
 594                 if (ret < 0)
 595                         goto err_unregister_kms_drivers;
 596         }
 597
 598         match = exynos_drm_match_add(&pdev->dev);
 599         if (IS_ERR(match)) {
 600                 ret = PTR_ERR(match);
 601                 goto err_unregister_kms_drivers;
 602         }
 603
 604         ret = component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 605                                                 match);
 606         if (ret < 0)
 607                 goto err_unregister_kms_drivers;
 608
 609         for (j = 0; j < ARRAY_SIZE(exynos_drm_non_kms_drivers); ++j) {
 610                 ret = platform_driver_register(exynos_drm_non_kms_drivers[j]);
 611                 if (ret < 0)
 612                         goto err_del_component_master;
 613         }
 614
 615         ret = exynos_platform_device_ipp_register();
 616         if (ret < 0)
 617                 goto err_unregister_non_kms_drivers;
 618
 619         /* Probe non kms sub drivers and virtual display driver. */
 620         ret = exynos_drm_device_subdrv_probe(platform_get_drvdata(pdev));
 621         if (ret)
 622                 goto err_unregister_resources;
 623
 624         return ret;
 625
 626 err_unregister_resources:
 627 #ifdef CONFIG_DRM_EXYNOS_IPP
 628         exynos_platform_device_ipp_unregister();
 629 #endif
 630 err_unregister_non_kms_drivers:
 631         while (--j >= 0)
 632                 platform_driver_unregister(exynos_drm_non_kms_drivers[j]);
 633
 634 err_del_component_master:
 635         component_master_del(&pdev->dev, &exynos_drm_ops);
 636
 637 err_unregister_kms_drivers:
 638         while (--i >= 0)
 639                 platform_driver_unregister(exynos_drm_kms_drivers[i]);
 640
 641         return ret;
 642 }
 643
 644 static int exynos_drm_platform_remove(struct platform_device *pdev)
 645 {
 646         int i;
 647
 648         exynos_drm_device_subdrv_remove(platform_get_drvdata(pdev));
 649
 650 #ifdef CONFIG_DRM_EXYNOS_IPP
 651         exynos_platform_device_ipp_unregister();
 652 #endif
 653
 654         for (i = ARRAY_SIZE(exynos_drm_non_kms_drivers) - 1; i >= 0; --i)
 655                 platform_driver_unregister(exynos_drm_non_kms_drivers[i]);
 656
 657         component_master_del(&pdev->dev, &exynos_drm_ops);
 658
 659         for (i = ARRAY_SIZE(exynos_drm_kms_drivers) - 1; i >= 0; --i)
 660                 platform_driver_unregister(exynos_drm_kms_drivers[i]);
 661
 662         return 0;
 663 }
 664
 665 static struct platform_driver exynos_drm_platform_driver = {
 666         .probe  = exynos_drm_platform_probe,
 667         .remove = exynos_drm_platform_remove,
 668         .driver = {
 669                 .owner  = THIS_MODULE,
 670                 .name   = "exynos-drm",
 671                 .pm     = &exynos_drm_pm_ops,
 672         },
 673 };
 674
 675 static int exynos_drm_init(void)
 676 {
 677         int ret;
 678
 679         /*
 680          * Register device object only in case of Exynos SoC.
 681          *
 682          * Below codes resolves temporarily infinite loop issue incurred
 683          * by Exynos drm driver when using multi-platform kernel.
 684          * So these codes will be replaced with more generic way later.
 685          */
 686         if (!of_machine_is_compatible("samsung,exynos3") &&
 687                         !of_machine_is_compatible("samsung,exynos4") &&
 688                         !of_machine_is_compatible("samsung,exynos5"))
 689                 return -ENODEV;
 690
 691         exynos_drm_pdev = platform_device_register_simple("exynos-drm", -1,
 692                                                                 NULL, 0);
 693         if (IS_ERR(exynos_drm_pdev))
 694                 return PTR_ERR(exynos_drm_pdev);
 695
 696         ret = exynos_drm_probe_vidi();
 697         if (ret < 0)
 698                 goto err_unregister_pd;
 699
 700         ret = platform_driver_register(&exynos_drm_platform_driver);
 701         if (ret)
 702                 goto err_remove_vidi;
 703
 704         return 0;
 705
 706 err_remove_vidi:
 707         exynos_drm_remove_vidi();
 708
 709 err_unregister_pd:
 710         platform_device_unregister(exynos_drm_pdev);
 711
 712         return ret;
 713 }
 714
 715 static void exynos_drm_exit(void)
 716 {
 717         platform_driver_unregister(&exynos_drm_platform_driver);
 718
 719         exynos_drm_remove_vidi();
 720
 721         platform_device_unregister(exynos_drm_pdev);
 722 }
 723
 724 module_init(exynos_drm_init);
 725 module_exit(exynos_drm_exit);
 726
 727 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 728 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 729 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 730 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 731 MODULE_LICENSE("GPL");