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