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_atomic.h>
  17 #include <drm/drm_atomic_helper.h>
  18 #include <drm/drm_crtc_helper.h>
  19
  20 #include <linux/component.h>
  21
  22 #include <drm/exynos_drm.h>
  23
  24 #include "exynos_drm_drv.h"
  25 #include "exynos_drm_crtc.h"
  26 #include "exynos_drm_fbdev.h"
  27 #include "exynos_drm_fb.h"
  28 #include "exynos_drm_gem.h"
  29 #include "exynos_drm_plane.h"
  30 #include "exynos_drm_vidi.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 struct exynos_atomic_commit {
  42         struct work_struct      work;
  43         struct drm_device       *dev;
  44         struct drm_atomic_state *state;
  45         u32                     crtcs;
  46 };
  47
  48 static void exynos_atomic_wait_for_commit(struct drm_atomic_state *state)
  49 {
  50         struct drm_crtc_state *crtc_state;
  51         struct drm_crtc *crtc;
  52         int i, ret;
  53
  54         for_each_crtc_in_state(state, crtc, crtc_state, i) {
  55                 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  56
  57                 if (!crtc->state->enable)
  58                         continue;
  59
  60                 ret = drm_crtc_vblank_get(crtc);
  61                 if (ret)
  62                         continue;
  63
  64                 exynos_drm_crtc_wait_pending_update(exynos_crtc);
  65                 drm_crtc_vblank_put(crtc);
  66         }
  67 }
  68
  69 static void exynos_atomic_commit_complete(struct exynos_atomic_commit *commit)
  70 {
  71         struct drm_device *dev = commit->dev;
  72         struct exynos_drm_private *priv = dev->dev_private;
  73         struct drm_atomic_state *state = commit->state;
  74         struct drm_plane *plane;
  75         struct drm_crtc *crtc;
  76         struct drm_plane_state *plane_state;
  77         struct drm_crtc_state *crtc_state;
  78         int i;
  79
  80         drm_atomic_helper_commit_modeset_disables(dev, state);
  81
  82         drm_atomic_helper_commit_modeset_enables(dev, state);
  83
  84         /*
  85          * Exynos can't update planes with CRTCs and encoders disabled,
  86          * its updates routines, specially for FIMD, requires the clocks
  87          * to be enabled. So it is necessary to handle the modeset operations
  88          * *before* the commit_planes() step, this way it will always
  89          * have the relevant clocks enabled to perform the update.
  90          */
  91
  92         for_each_crtc_in_state(state, crtc, crtc_state, i) {
  93                 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
  94
  95                 atomic_set(&exynos_crtc->pending_update, 0);
  96         }
  97
  98         for_each_plane_in_state(state, plane, plane_state, i) {
  99                 struct exynos_drm_crtc *exynos_crtc =
 100                                                 to_exynos_crtc(plane->crtc);
 101
 102                 if (!plane->crtc)
 103                         continue;
 104
 105                 atomic_inc(&exynos_crtc->pending_update);
 106         }
 107
 108         drm_atomic_helper_commit_planes(dev, state, false);
 109
 110         exynos_atomic_wait_for_commit(state);
 111
 112         drm_atomic_helper_cleanup_planes(dev, state);
 113
 114         drm_atomic_state_free(state);
 115
 116         spin_lock(&priv->lock);
 117         priv->pending &= ~commit->crtcs;
 118         spin_unlock(&priv->lock);
 119
 120         wake_up_all(&priv->wait);
 121
 122         kfree(commit);
 123 }
 124
 125 static void exynos_drm_atomic_work(struct work_struct *work)
 126 {
 127         struct exynos_atomic_commit *commit = container_of(work,
 128                                 struct exynos_atomic_commit, work);
 129
 130         exynos_atomic_commit_complete(commit);
 131 }
 132
 133 static struct device *exynos_drm_get_dma_device(void);
 134
 135 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
 136 {
 137         struct exynos_drm_private *private;
 138         struct drm_encoder *encoder;
 139         unsigned int clone_mask;
 140         int cnt, ret;
 141
 142         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
 143         if (!private)
 144                 return -ENOMEM;
 145
 146         init_waitqueue_head(&private->wait);
 147         spin_lock_init(&private->lock);
 148
 149         dev_set_drvdata(dev->dev, dev);
 150         dev->dev_private = (void *)private;
 151
 152         /* the first real CRTC device is used for all dma mapping operations */
 153         private->dma_dev = exynos_drm_get_dma_device();
 154         if (!private->dma_dev) {
 155                 DRM_ERROR("no device found for DMA mapping operations.\n");
 156                 ret = -ENODEV;
 157                 goto err_free_private;
 158         }
 159         DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
 160                  dev_name(private->dma_dev));
 161
 162         /*
 163          * create mapping to manage iommu table and set a pointer to iommu
 164          * mapping structure to iommu_mapping of private data.
 165          * also this iommu_mapping can be used to check if iommu is supported
 166          * or not.
 167          */
 168         ret = drm_create_iommu_mapping(dev);
 169         if (ret < 0) {
 170                 DRM_ERROR("failed to create iommu mapping.\n");
 171                 goto err_free_private;
 172         }
 173
 174         drm_mode_config_init(dev);
 175
 176         exynos_drm_mode_config_init(dev);
 177
 178         /* setup possible_clones. */
 179         cnt = 0;
 180         clone_mask = 0;
 181         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
 182                 clone_mask |= (1 << (cnt++));
 183
 184         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
 185                 encoder->possible_clones = clone_mask;
 186
 187         platform_set_drvdata(dev->platformdev, dev);
 188
 189         /* Try to bind all sub drivers. */
 190         ret = component_bind_all(dev->dev, dev);
 191         if (ret)
 192                 goto err_mode_config_cleanup;
 193
 194         ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 195         if (ret)
 196                 goto err_unbind_all;
 197
 198         /* Probe non kms sub drivers and virtual display driver. */
 199         ret = exynos_drm_device_subdrv_probe(dev);
 200         if (ret)
 201                 goto err_cleanup_vblank;
 202
 203         drm_mode_config_reset(dev);
 204
 205         /*
 206          * enable drm irq mode.
 207          * - with irq_enabled = true, we can use the vblank feature.
 208          *
 209          * P.S. note that we wouldn't use drm irq handler but
 210          *      just specific driver own one instead because
 211          *      drm framework supports only one irq handler.
 212          */
 213         dev->irq_enabled = true;
 214
 215         /*
 216          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 217          * by drm timer once a current process gives up ownership of
 218          * vblank event.(after drm_vblank_put function is called)
 219          */
 220         dev->vblank_disable_allowed = true;
 221
 222         /* init kms poll for handling hpd */
 223         drm_kms_helper_poll_init(dev);
 224
 225         /* force connectors detection */
 226         drm_helper_hpd_irq_event(dev);
 227
 228         return 0;
 229
 230 err_cleanup_vblank:
 231         drm_vblank_cleanup(dev);
 232 err_unbind_all:
 233         component_unbind_all(dev->dev, dev);
 234 err_mode_config_cleanup:
 235         drm_mode_config_cleanup(dev);
 236         drm_release_iommu_mapping(dev);
 237 err_free_private:
 238         kfree(private);
 239
 240         return ret;
 241 }
 242
 243 static int exynos_drm_unload(struct drm_device *dev)
 244 {
 245         exynos_drm_device_subdrv_remove(dev);
 246
 247         exynos_drm_fbdev_fini(dev);
 248         drm_kms_helper_poll_fini(dev);
 249
 250         drm_vblank_cleanup(dev);
 251         component_unbind_all(dev->dev, dev);
 252         drm_mode_config_cleanup(dev);
 253         drm_release_iommu_mapping(dev);
 254
 255         kfree(dev->dev_private);
 256         dev->dev_private = NULL;
 257
 258         return 0;
 259 }
 260
 261 static int commit_is_pending(struct exynos_drm_private *priv, u32 crtcs)
 262 {
 263         bool pending;
 264
 265         spin_lock(&priv->lock);
 266         pending = priv->pending & crtcs;
 267         spin_unlock(&priv->lock);
 268
 269         return pending;
 270 }
 271
 272 int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state,
 273                          bool async)
 274 {
 275         struct exynos_drm_private *priv = dev->dev_private;
 276         struct exynos_atomic_commit *commit;
 277         int i, ret;
 278
 279         commit = kzalloc(sizeof(*commit), GFP_KERNEL);
 280         if (!commit)
 281                 return -ENOMEM;
 282
 283         ret = drm_atomic_helper_prepare_planes(dev, state);
 284         if (ret) {
 285                 kfree(commit);
 286                 return ret;
 287         }
 288
 289         /* This is the point of no return */
 290
 291         INIT_WORK(&commit->work, exynos_drm_atomic_work);
 292         commit->dev = dev;
 293         commit->state = state;
 294
 295         /* Wait until all affected CRTCs have completed previous commits and
 296          * mark them as pending.
 297          */
 298         for (i = 0; i < dev->mode_config.num_crtc; ++i) {
 299                 if (state->crtcs[i])
 300                         commit->crtcs |= 1 << drm_crtc_index(state->crtcs[i]);
 301         }
 302
 303         wait_event(priv->wait, !commit_is_pending(priv, commit->crtcs));
 304
 305         spin_lock(&priv->lock);
 306         priv->pending |= commit->crtcs;
 307         spin_unlock(&priv->lock);
 308
 309         drm_atomic_helper_swap_state(dev, state);
 310
 311         if (async)
 312                 schedule_work(&commit->work);
 313         else
 314                 exynos_atomic_commit_complete(commit);
 315
 316         return 0;
 317 }
 318
 319 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 320 {
 321         struct drm_exynos_file_private *file_priv;
 322         int ret;
 323
 324         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
 325         if (!file_priv)
 326                 return -ENOMEM;
 327
 328         file->driver_priv = file_priv;
 329
 330         ret = exynos_drm_subdrv_open(dev, file);
 331         if (ret)
 332                 goto err_file_priv_free;
 333
 334         return ret;
 335
 336 err_file_priv_free:
 337         kfree(file_priv);
 338         file->driver_priv = NULL;
 339         return ret;
 340 }
 341
 342 static void exynos_drm_preclose(struct drm_device *dev,
 343                                         struct drm_file *file)
 344 {
 345         struct drm_crtc *crtc;
 346
 347         exynos_drm_subdrv_close(dev, file);
 348
 349         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 350                 exynos_drm_crtc_cancel_page_flip(crtc, file);
 351 }
 352
 353 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
 354 {
 355         kfree(file->driver_priv);
 356         file->driver_priv = NULL;
 357 }
 358
 359 static void exynos_drm_lastclose(struct drm_device *dev)
 360 {
 361         exynos_drm_fbdev_restore_mode(dev);
 362 }
 363
 364 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
 365         .fault = exynos_drm_gem_fault,
 366         .open = drm_gem_vm_open,
 367         .close = drm_gem_vm_close,
 368 };
 369
 370 static const struct drm_ioctl_desc exynos_ioctls[] = {
 371         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 372                         DRM_AUTH | DRM_RENDER_ALLOW),
 373         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
 374                         DRM_AUTH | DRM_RENDER_ALLOW),
 375         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
 376                         DRM_RENDER_ALLOW),
 377         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
 378                         DRM_AUTH),
 379         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
 380                         DRM_AUTH | DRM_RENDER_ALLOW),
 381         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
 382                         DRM_AUTH | DRM_RENDER_ALLOW),
 383         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
 384                         DRM_AUTH | DRM_RENDER_ALLOW),
 385         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY, exynos_drm_ipp_get_property,
 386                         DRM_AUTH | DRM_RENDER_ALLOW),
 387         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY, exynos_drm_ipp_set_property,
 388                         DRM_AUTH | DRM_RENDER_ALLOW),
 389         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF, exynos_drm_ipp_queue_buf,
 390                         DRM_AUTH | DRM_RENDER_ALLOW),
 391         DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL, exynos_drm_ipp_cmd_ctrl,
 392                         DRM_AUTH | DRM_RENDER_ALLOW),
 393 };
 394
 395 static const struct file_operations exynos_drm_driver_fops = {
 396         .owner          = THIS_MODULE,
 397         .open           = drm_open,
 398         .mmap           = exynos_drm_gem_mmap,
 399         .poll           = drm_poll,
 400         .read           = drm_read,
 401         .unlocked_ioctl = drm_ioctl,
 402 #ifdef CONFIG_COMPAT
 403         .compat_ioctl = drm_compat_ioctl,
 404 #endif
 405         .release        = drm_release,
 406 };
 407
 408 static struct drm_driver exynos_drm_driver = {
 409         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
 410                                   | DRIVER_ATOMIC | DRIVER_RENDER,
 411         .load                   = exynos_drm_load,
 412         .unload                 = exynos_drm_unload,
 413         .open                   = exynos_drm_open,
 414         .preclose               = exynos_drm_preclose,
 415         .lastclose              = exynos_drm_lastclose,
 416         .postclose              = exynos_drm_postclose,
 417         .set_busid              = drm_platform_set_busid,
 418         .get_vblank_counter     = drm_vblank_no_hw_counter,
 419         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 420         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 421         .gem_free_object        = exynos_drm_gem_free_object,
 422         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 423         .dumb_create            = exynos_drm_gem_dumb_create,
 424         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 425         .dumb_destroy           = drm_gem_dumb_destroy,
 426         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 427         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 428         .gem_prime_export       = drm_gem_prime_export,
 429         .gem_prime_import       = drm_gem_prime_import,
 430         .gem_prime_get_sg_table = exynos_drm_gem_prime_get_sg_table,
 431         .gem_prime_import_sg_table      = exynos_drm_gem_prime_import_sg_table,
 432         .gem_prime_vmap         = exynos_drm_gem_prime_vmap,
 433         .gem_prime_vunmap       = exynos_drm_gem_prime_vunmap,
 434         .ioctls                 = exynos_ioctls,
 435         .num_ioctls             = ARRAY_SIZE(exynos_ioctls),
 436         .fops                   = &exynos_drm_driver_fops,
 437         .name   = DRIVER_NAME,
 438         .desc   = DRIVER_DESC,
 439         .date   = DRIVER_DATE,
 440         .major  = DRIVER_MAJOR,
 441         .minor  = DRIVER_MINOR,
 442 };
 443
 444 #ifdef CONFIG_PM_SLEEP
 445 static int exynos_drm_suspend(struct device *dev)
 446 {
 447         struct drm_device *drm_dev = dev_get_drvdata(dev);
 448         struct drm_connector *connector;
 449
 450         if (pm_runtime_suspended(dev) || !drm_dev)
 451                 return 0;
 452
 453         drm_modeset_lock_all(drm_dev);
 454         drm_for_each_connector(connector, drm_dev) {
 455                 int old_dpms = connector->dpms;
 456
 457                 if (connector->funcs->dpms)
 458                         connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
 459
 460                 /* Set the old mode back to the connector for resume */
 461                 connector->dpms = old_dpms;
 462         }
 463         drm_modeset_unlock_all(drm_dev);
 464
 465         return 0;
 466 }
 467
 468 static int exynos_drm_resume(struct device *dev)
 469 {
 470         struct drm_device *drm_dev = dev_get_drvdata(dev);
 471         struct drm_connector *connector;
 472
 473         if (pm_runtime_suspended(dev) || !drm_dev)
 474                 return 0;
 475
 476         drm_modeset_lock_all(drm_dev);
 477         drm_for_each_connector(connector, drm_dev) {
 478                 if (connector->funcs->dpms) {
 479                         int dpms = connector->dpms;
 480
 481                         connector->dpms = DRM_MODE_DPMS_OFF;
 482                         connector->funcs->dpms(connector, dpms);
 483                 }
 484         }
 485         drm_modeset_unlock_all(drm_dev);
 486
 487         return 0;
 488 }
 489 #endif
 490
 491 static const struct dev_pm_ops exynos_drm_pm_ops = {
 492         SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_suspend, exynos_drm_resume)
 493 };
 494
 495 /* forward declaration */
 496 static struct platform_driver exynos_drm_platform_driver;
 497
 498 struct exynos_drm_driver_info {
 499         struct platform_driver *driver;
 500         unsigned int flags;
 501 };
 502
 503 #define DRM_COMPONENT_DRIVER    BIT(0)  /* supports component framework */
 504 #define DRM_VIRTUAL_DEVICE      BIT(1)  /* create virtual platform device */
 505 #define DRM_DMA_DEVICE          BIT(2)  /* can be used for dma allocations */
 506
 507 #define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
 508
 509 /*
 510  * Connector drivers should not be placed before associated crtc drivers,
 511  * because connector requires pipe number of its crtc during initialization.
 512  */
 513 static struct exynos_drm_driver_info exynos_drm_drivers[] = {
 514         {
 515                 DRV_PTR(fimd_driver, CONFIG_DRM_EXYNOS_FIMD),
 516                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 517         }, {
 518                 DRV_PTR(exynos5433_decon_driver, CONFIG_DRM_EXYNOS5433_DECON),
 519                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 520         }, {
 521                 DRV_PTR(decon_driver, CONFIG_DRM_EXYNOS7_DECON),
 522                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 523         }, {
 524                 DRV_PTR(mixer_driver, CONFIG_DRM_EXYNOS_MIXER),
 525                 DRM_COMPONENT_DRIVER | DRM_DMA_DEVICE
 526         }, {
 527                 DRV_PTR(mic_driver, CONFIG_DRM_EXYNOS_MIC),
 528                 DRM_COMPONENT_DRIVER
 529         }, {
 530                 DRV_PTR(dp_driver, CONFIG_DRM_EXYNOS_DP),
 531                 DRM_COMPONENT_DRIVER
 532         }, {
 533                 DRV_PTR(dsi_driver, CONFIG_DRM_EXYNOS_DSI),
 534                 DRM_COMPONENT_DRIVER
 535         }, {
 536                 DRV_PTR(hdmi_driver, CONFIG_DRM_EXYNOS_HDMI),
 537                 DRM_COMPONENT_DRIVER
 538         }, {
 539                 DRV_PTR(vidi_driver, CONFIG_DRM_EXYNOS_VIDI),
 540                 DRM_COMPONENT_DRIVER | DRM_VIRTUAL_DEVICE
 541         }, {
 542                 DRV_PTR(g2d_driver, CONFIG_DRM_EXYNOS_G2D),
 543         }, {
 544                 DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
 545         }, {
 546                 DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
 547         }, {
 548                 DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
 549         }, {
 550                 DRV_PTR(ipp_driver, CONFIG_DRM_EXYNOS_IPP),
 551                 DRM_VIRTUAL_DEVICE
 552         }, {
 553                 &exynos_drm_platform_driver,
 554                 DRM_VIRTUAL_DEVICE
 555         }
 556 };
 557
 558 static int compare_dev(struct device *dev, void *data)
 559 {
 560         return dev == (struct device *)data;
 561 }
 562
 563 static struct component_match *exynos_drm_match_add(struct device *dev)
 564 {
 565         struct component_match *match = NULL;
 566         int i;
 567
 568         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 569                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 570                 struct device *p = NULL, *d;
 571
 572                 if (!info->driver || !(info->flags & DRM_COMPONENT_DRIVER))
 573                         continue;
 574
 575                 while ((d = bus_find_device(&platform_bus_type, p,
 576                                             &info->driver->driver,
 577                                             (void *)platform_bus_type.match))) {
 578                         put_device(p);
 579                         component_match_add(dev, &match, compare_dev, d);
 580                         p = d;
 581                 }
 582                 put_device(p);
 583         }
 584
 585         return match ?: ERR_PTR(-ENODEV);
 586 }
 587
 588 static int exynos_drm_bind(struct device *dev)
 589 {
 590         return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
 591 }
 592
 593 static void exynos_drm_unbind(struct device *dev)
 594 {
 595         drm_put_dev(dev_get_drvdata(dev));
 596 }
 597
 598 static const struct component_master_ops exynos_drm_ops = {
 599         .bind           = exynos_drm_bind,
 600         .unbind         = exynos_drm_unbind,
 601 };
 602
 603 static int exynos_drm_platform_probe(struct platform_device *pdev)
 604 {
 605         struct component_match *match;
 606
 607         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 608         exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
 609
 610         match = exynos_drm_match_add(&pdev->dev);
 611         if (IS_ERR(match))
 612                 return PTR_ERR(match);
 613
 614         return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
 615                                                match);
 616 }
 617
 618 static int exynos_drm_platform_remove(struct platform_device *pdev)
 619 {
 620         component_master_del(&pdev->dev, &exynos_drm_ops);
 621         return 0;
 622 }
 623
 624 static struct platform_driver exynos_drm_platform_driver = {
 625         .probe  = exynos_drm_platform_probe,
 626         .remove = exynos_drm_platform_remove,
 627         .driver = {
 628                 .name   = "exynos-drm",
 629                 .pm     = &exynos_drm_pm_ops,
 630         },
 631 };
 632
 633 static struct device *exynos_drm_get_dma_device(void)
 634 {
 635         int i;
 636
 637         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 638                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 639                 struct device *dev;
 640
 641                 if (!info->driver || !(info->flags & DRM_DMA_DEVICE))
 642                         continue;
 643
 644                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 645                                             &info->driver->driver,
 646                                             (void *)platform_bus_type.match))) {
 647                         put_device(dev);
 648                         return dev;
 649                 }
 650         }
 651         return NULL;
 652 }
 653
 654 static void exynos_drm_unregister_devices(void)
 655 {
 656         int i;
 657
 658         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 659                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 660                 struct device *dev;
 661
 662                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 663                         continue;
 664
 665                 while ((dev = bus_find_device(&platform_bus_type, NULL,
 666                                             &info->driver->driver,
 667                                             (void *)platform_bus_type.match))) {
 668                         put_device(dev);
 669                         platform_device_unregister(to_platform_device(dev));
 670                 }
 671         }
 672 }
 673
 674 static int exynos_drm_register_devices(void)
 675 {
 676         struct platform_device *pdev;
 677         int i;
 678
 679         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 680                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 681
 682                 if (!info->driver || !(info->flags & DRM_VIRTUAL_DEVICE))
 683                         continue;
 684
 685                 pdev = platform_device_register_simple(
 686                                         info->driver->driver.name, -1, NULL, 0);
 687                 if (IS_ERR(pdev))
 688                         goto fail;
 689         }
 690
 691         return 0;
 692 fail:
 693         exynos_drm_unregister_devices();
 694         return PTR_ERR(pdev);
 695 }
 696
 697 static void exynos_drm_unregister_drivers(void)
 698 {
 699         int i;
 700
 701         for (i = ARRAY_SIZE(exynos_drm_drivers) - 1; i >= 0; --i) {
 702                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 703
 704                 if (!info->driver)
 705                         continue;
 706
 707                 platform_driver_unregister(info->driver);
 708         }
 709 }
 710
 711 static int exynos_drm_register_drivers(void)
 712 {
 713         int i, ret;
 714
 715         for (i = 0; i < ARRAY_SIZE(exynos_drm_drivers); ++i) {
 716                 struct exynos_drm_driver_info *info = &exynos_drm_drivers[i];
 717
 718                 if (!info->driver)
 719                         continue;
 720
 721                 ret = platform_driver_register(info->driver);
 722                 if (ret)
 723                         goto fail;
 724         }
 725         return 0;
 726 fail:
 727         exynos_drm_unregister_drivers();
 728         return ret;
 729 }
 730
 731 static int exynos_drm_init(void)
 732 {
 733         int ret;
 734
 735         ret = exynos_drm_register_devices();
 736         if (ret)
 737                 return ret;
 738
 739         ret = exynos_drm_register_drivers();
 740         if (ret)
 741                 goto err_unregister_pdevs;
 742
 743         return 0;
 744
 745 err_unregister_pdevs:
 746         exynos_drm_unregister_devices();
 747
 748         return ret;
 749 }
 750
 751 static void exynos_drm_exit(void)
 752 {
 753         exynos_drm_unregister_drivers();
 754         exynos_drm_unregister_devices();
 755 }
 756
 757 module_init(exynos_drm_init);
 758 module_exit(exynos_drm_exit);
 759
 760 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 761 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 762 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 763 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 764 MODULE_LICENSE("GPL");