drivers/gpu/drm/rockchip/rockchip_drm_drv.c

   1 /*
   2  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
   3  * Author:Mark Yao <mark.yao@rock-chips.com>
   4  *
   5  * based on exynos_drm_drv.c
   6  *
   7  * This software is licensed under the terms of the GNU General Public
   8  * License version 2, as published by the Free Software Foundation, and
   9  * may be copied, distributed, and modified under those terms.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/dma-iommu.h>
  18
  19 #include <drm/drmP.h>
  20 #include <drm/drm_crtc_helper.h>
  21 #include <drm/drm_fb_helper.h>
  22 #include <drm/drm_sync_helper.h>
  23 #include <drm/rockchip_drm.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/pm_runtime.h>
  26 #include <linux/module.h>
  27 #include <linux/of_graph.h>
  28 #include <linux/component.h>
  29 #include <linux/fence.h>
  30 #include <linux/console.h>
  31
  32 #include "rockchip_drm_drv.h"
  33 #include "rockchip_drm_fb.h"
  34 #include "rockchip_drm_fbdev.h"
  35 #include "rockchip_drm_gem.h"
  36 #include "rockchip_drm_rga.h"
  37
  38 #define DRIVER_NAME     "rockchip"
  39 #define DRIVER_DESC     "RockChip Soc DRM"
  40 #define DRIVER_DATE     "20140818"
  41 #define DRIVER_MAJOR    1
  42 #define DRIVER_MINOR    0
  43
  44 static LIST_HEAD(rockchip_drm_subdrv_list);
  45 static DEFINE_MUTEX(subdrv_list_mutex);
  46
  47 /*
  48  * Attach a (component) device to the shared drm dma mapping from master drm
  49  * device.  This is used by the VOPs to map GEM buffers to a common DMA
  50  * mapping.
  51  */
  52 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
  53                                    struct device *dev)
  54 {
  55         struct rockchip_drm_private *private = drm_dev->dev_private;
  56         struct iommu_domain *domain = private->domain;
  57         int ret;
  58
  59         ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
  60         if (ret)
  61                 return ret;
  62
  63         dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
  64         ret = iommu_attach_device(domain, dev);
  65         if (ret) {
  66                 dev_err(dev, "Failed to attach iommu device\n");
  67                 return ret;
  68         }
  69
  70         if (!common_iommu_setup_dma_ops(dev, 0x10000000, SZ_2G, domain->ops)) {
  71                 dev_err(dev, "Failed to set dma_ops\n");
  72                 iommu_detach_device(domain, dev);
  73                 ret = -ENODEV;
  74         }
  75
  76         return ret;
  77 }
  78
  79 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
  80                                     struct device *dev)
  81 {
  82         struct rockchip_drm_private *private = drm_dev->dev_private;
  83         struct iommu_domain *domain = private->domain;
  84
  85         iommu_detach_device(domain, dev);
  86 }
  87
  88 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
  89                                  const struct rockchip_crtc_funcs *crtc_funcs)
  90 {
  91         int pipe = drm_crtc_index(crtc);
  92         struct rockchip_drm_private *priv = crtc->dev->dev_private;
  93
  94         if (pipe > ROCKCHIP_MAX_CRTC)
  95                 return -EINVAL;
  96
  97         priv->crtc_funcs[pipe] = crtc_funcs;
  98
  99         return 0;
 100 }
 101
 102 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
 103 {
 104         int pipe = drm_crtc_index(crtc);
 105         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 106
 107         if (pipe > ROCKCHIP_MAX_CRTC)
 108                 return;
 109
 110         priv->crtc_funcs[pipe] = NULL;
 111 }
 112
 113 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
 114                                                 int pipe)
 115 {
 116         struct drm_crtc *crtc;
 117         int i = 0;
 118
 119         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 120                 if (i++ == pipe)
 121                         return crtc;
 122
 123         return NULL;
 124 }
 125
 126 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
 127                                            unsigned int pipe)
 128 {
 129         struct rockchip_drm_private *priv = dev->dev_private;
 130         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 131
 132         if (crtc && priv->crtc_funcs[pipe] &&
 133             priv->crtc_funcs[pipe]->enable_vblank)
 134                 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
 135
 136         return 0;
 137 }
 138
 139 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
 140                                              unsigned int pipe)
 141 {
 142         struct rockchip_drm_private *priv = dev->dev_private;
 143         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 144
 145         if (crtc && priv->crtc_funcs[pipe] &&
 146             priv->crtc_funcs[pipe]->enable_vblank)
 147                 priv->crtc_funcs[pipe]->disable_vblank(crtc);
 148 }
 149
 150 static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
 151 {
 152         struct rockchip_drm_private *private;
 153         struct device *dev = drm_dev->dev;
 154         struct drm_connector *connector;
 155         struct iommu_group *group;
 156         int ret;
 157
 158         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 159         if (!private)
 160                 return -ENOMEM;
 161
 162         mutex_init(&private->commit.lock);
 163         INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
 164
 165         drm_dev->dev_private = private;
 166
 167 #ifdef CONFIG_DRM_DMA_SYNC
 168         private->cpu_fence_context = fence_context_alloc(1);
 169         atomic_set(&private->cpu_fence_seqno, 0);
 170 #endif
 171
 172         drm_mode_config_init(drm_dev);
 173
 174         rockchip_drm_mode_config_init(drm_dev);
 175
 176         dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
 177                                       GFP_KERNEL);
 178         if (!dev->dma_parms) {
 179                 ret = -ENOMEM;
 180                 goto err_config_cleanup;
 181         }
 182
 183         private->domain = iommu_domain_alloc(&platform_bus_type);
 184         if (!private->domain)
 185                 return -ENOMEM;
 186
 187         ret = iommu_get_dma_cookie(private->domain);
 188         if (ret)
 189                 goto err_free_domain;
 190
 191         group = iommu_group_get(dev);
 192         if (!group) {
 193                 group = iommu_group_alloc();
 194                 if (IS_ERR(group)) {
 195                         dev_err(dev, "Failed to allocate IOMMU group\n");
 196                         goto err_put_cookie;
 197                 }
 198
 199                 ret = iommu_group_add_device(group, dev);
 200                 iommu_group_put(group);
 201                 if (ret) {
 202                         dev_err(dev, "failed to add device to IOMMU group\n");
 203                         goto err_put_cookie;
 204                 }
 205         }
 206         /*
 207          * Attach virtual iommu device, sub iommu device can share the same
 208          * mapping with it.
 209          */
 210         ret = rockchip_drm_dma_attach_device(drm_dev, dev);
 211         if (ret)
 212                 goto err_group_remove_device;
 213
 214         /* Try to bind all sub drivers. */
 215         ret = component_bind_all(dev, drm_dev);
 216         if (ret)
 217                 goto err_detach_device;
 218
 219         /*
 220          * All components are now added, we can publish the connector sysfs
 221          * entries to userspace.  This will generate hotplug events and so
 222          * userspace will expect to be able to access DRM at this point.
 223          */
 224         list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
 225                         head) {
 226                 ret = drm_connector_register(connector);
 227                 if (ret) {
 228                         dev_err(drm_dev->dev,
 229                                 "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
 230                                 connector->base.id,
 231                                 connector->name, ret);
 232                         goto err_unbind;
 233                 }
 234         }
 235
 236         /* init kms poll for handling hpd */
 237         drm_kms_helper_poll_init(drm_dev);
 238
 239         /*
 240          * enable drm irq mode.
 241          * - with irq_enabled = true, we can use the vblank feature.
 242          */
 243         drm_dev->irq_enabled = true;
 244
 245         ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
 246         if (ret)
 247                 goto err_kms_helper_poll_fini;
 248
 249         /*
 250          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 251          * by drm timer once a current process gives up ownership of
 252          * vblank event.(after drm_vblank_put function is called)
 253          */
 254         drm_dev->vblank_disable_allowed = true;
 255
 256         drm_mode_config_reset(drm_dev);
 257
 258         ret = rockchip_drm_fbdev_init(drm_dev);
 259         if (ret)
 260                 goto err_vblank_cleanup;
 261
 262         return 0;
 263 err_vblank_cleanup:
 264         drm_vblank_cleanup(drm_dev);
 265 err_kms_helper_poll_fini:
 266         drm_kms_helper_poll_fini(drm_dev);
 267 err_unbind:
 268         component_unbind_all(dev, drm_dev);
 269 err_detach_device:
 270         rockchip_drm_dma_detach_device(drm_dev, dev);
 271 err_group_remove_device:
 272         iommu_group_remove_device(dev);
 273 err_put_cookie:
 274         iommu_put_dma_cookie(private->domain);
 275 err_free_domain:
 276         iommu_domain_free(private->domain);
 277 err_config_cleanup:
 278         drm_mode_config_cleanup(drm_dev);
 279         drm_dev->dev_private = NULL;
 280         return ret;
 281 }
 282
 283 static int rockchip_drm_unload(struct drm_device *drm_dev)
 284 {
 285         struct device *dev = drm_dev->dev;
 286         struct rockchip_drm_private *private = drm_dev->dev_private;
 287
 288         rockchip_drm_fbdev_fini(drm_dev);
 289         drm_vblank_cleanup(drm_dev);
 290         drm_kms_helper_poll_fini(drm_dev);
 291         component_unbind_all(dev, drm_dev);
 292         rockchip_drm_dma_detach_device(drm_dev, dev);
 293         iommu_group_remove_device(dev);
 294         iommu_put_dma_cookie(private->domain);
 295         iommu_domain_free(private->domain);
 296         drm_mode_config_cleanup(drm_dev);
 297         drm_dev->dev_private = NULL;
 298
 299         return 0;
 300 }
 301
 302 static void rockchip_drm_crtc_cancel_pending_vblank(struct drm_crtc *crtc,
 303                                                     struct drm_file *file_priv)
 304 {
 305         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 306         int pipe = drm_crtc_index(crtc);
 307
 308         if (pipe < ROCKCHIP_MAX_CRTC &&
 309             priv->crtc_funcs[pipe] &&
 310             priv->crtc_funcs[pipe]->cancel_pending_vblank)
 311                 priv->crtc_funcs[pipe]->cancel_pending_vblank(crtc, file_priv);
 312 }
 313
 314 int rockchip_drm_register_subdrv(struct drm_rockchip_subdrv *subdrv)
 315 {
 316         if (!subdrv)
 317                 return -EINVAL;
 318
 319         mutex_lock(&subdrv_list_mutex);
 320         list_add_tail(&subdrv->list, &rockchip_drm_subdrv_list);
 321         mutex_unlock(&subdrv_list_mutex);
 322
 323         return 0;
 324 }
 325 EXPORT_SYMBOL_GPL(rockchip_drm_register_subdrv);
 326
 327 int rockchip_drm_unregister_subdrv(struct drm_rockchip_subdrv *subdrv)
 328 {
 329         if (!subdrv)
 330                 return -EINVAL;
 331
 332         mutex_lock(&subdrv_list_mutex);
 333         list_del(&subdrv->list);
 334         mutex_unlock(&subdrv_list_mutex);
 335
 336         return 0;
 337 }
 338 EXPORT_SYMBOL_GPL(rockchip_drm_unregister_subdrv);
 339
 340 static int rockchip_drm_open(struct drm_device *dev, struct drm_file *file)
 341 {
 342         struct rockchip_drm_file_private *file_priv;
 343         struct drm_rockchip_subdrv *subdrv;
 344         int ret = 0;
 345
 346         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
 347         if (!file_priv)
 348                 return -ENOMEM;
 349         INIT_LIST_HEAD(&file_priv->gem_cpu_acquire_list);
 350
 351         file->driver_priv = file_priv;
 352
 353         mutex_lock(&subdrv_list_mutex);
 354         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list) {
 355                 ret = subdrv->open(dev, subdrv->dev, file);
 356                 if (ret) {
 357                         mutex_unlock(&subdrv_list_mutex);
 358                         goto err_free_file_priv;
 359                 }
 360         }
 361         mutex_unlock(&subdrv_list_mutex);
 362
 363         return 0;
 364
 365 err_free_file_priv:
 366         kfree(file_priv);
 367         file_priv = NULL;
 368
 369         return ret;
 370 }
 371
 372 static void rockchip_drm_preclose(struct drm_device *dev,
 373                                   struct drm_file *file_priv)
 374 {
 375         struct rockchip_drm_file_private *file_private = file_priv->driver_priv;
 376         struct rockchip_gem_object_node *cur, *d;
 377         struct drm_rockchip_subdrv *subdrv;
 378         struct drm_crtc *crtc;
 379
 380         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 381                 rockchip_drm_crtc_cancel_pending_vblank(crtc, file_priv);
 382
 383         mutex_lock(&dev->struct_mutex);
 384         list_for_each_entry_safe(cur, d,
 385                         &file_private->gem_cpu_acquire_list, list) {
 386 #ifdef CONFIG_DRM_DMA_SYNC
 387                 BUG_ON(!cur->rockchip_gem_obj->acquire_fence);
 388                 drm_fence_signal_and_put(&cur->rockchip_gem_obj->acquire_fence);
 389 #endif
 390                 drm_gem_object_unreference(&cur->rockchip_gem_obj->base);
 391                 kfree(cur);
 392         }
 393         /* since we are deleting the whole list, just initialize the header
 394          * instead of calling list_del for every element
 395          */
 396         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
 397         mutex_unlock(&dev->struct_mutex);
 398
 399         mutex_lock(&subdrv_list_mutex);
 400         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list)
 401                 subdrv->close(dev, subdrv->dev, file_priv);
 402         mutex_unlock(&subdrv_list_mutex);
 403 }
 404
 405 static void rockchip_drm_postclose(struct drm_device *dev, struct drm_file *file)
 406 {
 407         kfree(file->driver_priv);
 408         file->driver_priv = NULL;
 409 }
 410
 411 void rockchip_drm_lastclose(struct drm_device *dev)
 412 {
 413         struct rockchip_drm_private *priv = dev->dev_private;
 414
 415         drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev_helper);
 416 }
 417
 418 static const struct drm_ioctl_desc rockchip_ioctls[] = {
 419         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CREATE, rockchip_gem_create_ioctl,
 420                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 421         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_MAP_OFFSET,
 422                           rockchip_gem_map_offset_ioctl,
 423                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 424         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_ACQUIRE,
 425                           rockchip_gem_cpu_acquire_ioctl,
 426                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 427         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_RELEASE,
 428                           rockchip_gem_cpu_release_ioctl,
 429                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 430         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_GET_VER, rockchip_rga_get_ver_ioctl,
 431                           DRM_AUTH | DRM_RENDER_ALLOW),
 432         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_SET_CMDLIST,
 433                           rockchip_rga_set_cmdlist_ioctl,
 434                           DRM_AUTH | DRM_RENDER_ALLOW),
 435         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_EXEC, rockchip_rga_exec_ioctl,
 436                           DRM_AUTH | DRM_RENDER_ALLOW),
 437 };
 438
 439 static const struct file_operations rockchip_drm_driver_fops = {
 440         .owner = THIS_MODULE,
 441         .open = drm_open,
 442         .mmap = rockchip_gem_mmap,
 443         .poll = drm_poll,
 444         .read = drm_read,
 445         .unlocked_ioctl = drm_ioctl,
 446 #ifdef CONFIG_COMPAT
 447         .compat_ioctl = drm_compat_ioctl,
 448 #endif
 449         .release = drm_release,
 450 };
 451
 452 const struct vm_operations_struct rockchip_drm_vm_ops = {
 453         .open = drm_gem_vm_open,
 454         .close = drm_gem_vm_close,
 455 };
 456
 457 static struct drm_driver rockchip_drm_driver = {
 458         .driver_features        = DRIVER_MODESET | DRIVER_GEM |
 459                                   DRIVER_PRIME | DRIVER_ATOMIC |
 460                                   DRIVER_RENDER,
 461         .load                   = rockchip_drm_load,
 462         .unload                 = rockchip_drm_unload,
 463         .preclose               = rockchip_drm_preclose,
 464         .lastclose              = rockchip_drm_lastclose,
 465         .get_vblank_counter     = drm_vblank_no_hw_counter,
 466         .open                   = rockchip_drm_open,
 467         .postclose              = rockchip_drm_postclose,
 468         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
 469         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
 470         .gem_vm_ops             = &rockchip_drm_vm_ops,
 471         .gem_free_object        = rockchip_gem_free_object,
 472         .dumb_create            = rockchip_gem_dumb_create,
 473         .dumb_map_offset        = rockchip_gem_dumb_map_offset,
 474         .dumb_destroy           = drm_gem_dumb_destroy,
 475         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 476         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 477         .gem_prime_import       = drm_gem_prime_import,
 478         .gem_prime_import_sg_table = rockchip_gem_prime_import_sg_table,
 479         .gem_prime_export       = drm_gem_prime_export,
 480         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
 481         .gem_prime_vmap         = rockchip_gem_prime_vmap,
 482         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
 483         .gem_prime_mmap         = rockchip_gem_mmap_buf,
 484         .ioctls                 = rockchip_ioctls,
 485         .num_ioctls             = ARRAY_SIZE(rockchip_ioctls),
 486         .fops                   = &rockchip_drm_driver_fops,
 487         .name   = DRIVER_NAME,
 488         .desc   = DRIVER_DESC,
 489         .date   = DRIVER_DATE,
 490         .major  = DRIVER_MAJOR,
 491         .minor  = DRIVER_MINOR,
 492 };
 493
 494 #ifdef CONFIG_PM_SLEEP
 495 void rockchip_drm_fb_suspend(struct drm_device *drm)
 496 {
 497         struct rockchip_drm_private *priv = drm->dev_private;
 498
 499         console_lock();
 500         drm_fb_helper_set_suspend(priv->fbdev_helper, 1);
 501         console_unlock();
 502 }
 503
 504 void rockchip_drm_fb_resume(struct drm_device *drm)
 505 {
 506         struct rockchip_drm_private *priv = drm->dev_private;
 507
 508         console_lock();
 509         drm_fb_helper_set_suspend(priv->fbdev_helper, 0);
 510         console_unlock();
 511 }
 512
 513 static int rockchip_drm_sys_suspend(struct device *dev)
 514 {
 515         struct drm_device *drm = dev_get_drvdata(dev);
 516         struct rockchip_drm_private *priv = drm->dev_private;
 517
 518         drm_kms_helper_poll_disable(drm);
 519         rockchip_drm_fb_suspend(drm);
 520
 521         priv->state = drm_atomic_helper_suspend(drm);
 522         if (IS_ERR(priv->state)) {
 523                 rockchip_drm_fb_resume(drm);
 524                 drm_kms_helper_poll_enable(drm);
 525                 return PTR_ERR(priv->state);
 526         }
 527
 528         return 0;
 529 }
 530
 531 static int rockchip_drm_sys_resume(struct device *dev)
 532 {
 533         struct drm_device *drm = dev_get_drvdata(dev);
 534         struct rockchip_drm_private *priv = drm->dev_private;
 535
 536         drm_atomic_helper_resume(drm, priv->state);
 537         rockchip_drm_fb_resume(drm);
 538         drm_kms_helper_poll_enable(drm);
 539
 540         return 0;
 541 }
 542 #endif
 543
 544 static const struct dev_pm_ops rockchip_drm_pm_ops = {
 545         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
 546                                 rockchip_drm_sys_resume)
 547 };
 548
 549 static int compare_of(struct device *dev, void *data)
 550 {
 551         struct device_node *np = data;
 552
 553         return dev->of_node == np;
 554 }
 555
 556 static void rockchip_add_endpoints(struct device *dev,
 557                                    struct component_match **match,
 558                                    struct device_node *port)
 559 {
 560         struct device_node *ep, *remote;
 561
 562         for_each_child_of_node(port, ep) {
 563                 remote = of_graph_get_remote_port_parent(ep);
 564                 if (!remote || !of_device_is_available(remote)) {
 565                         of_node_put(remote);
 566                         continue;
 567                 } else if (!of_device_is_available(remote->parent)) {
 568                         dev_warn(dev, "parent device of %s is not available\n",
 569                                  remote->full_name);
 570                         of_node_put(remote);
 571                         continue;
 572                 }
 573
 574                 component_match_add(dev, match, compare_of, remote);
 575                 of_node_put(remote);
 576         }
 577 }
 578
 579 static int rockchip_drm_bind(struct device *dev)
 580 {
 581         struct drm_device *drm;
 582         int ret;
 583
 584         drm = drm_dev_alloc(&rockchip_drm_driver, dev);
 585         if (!drm)
 586                 return -ENOMEM;
 587
 588         ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
 589         if (ret)
 590                 goto err_free;
 591
 592         ret = drm_dev_register(drm, 0);
 593         if (ret)
 594                 goto err_free;
 595
 596         dev_set_drvdata(dev, drm);
 597
 598         return 0;
 599
 600 err_free:
 601         drm_dev_unref(drm);
 602         return ret;
 603 }
 604
 605 static void rockchip_drm_unbind(struct device *dev)
 606 {
 607         struct drm_device *drm = dev_get_drvdata(dev);
 608
 609         drm_dev_unregister(drm);
 610         drm_dev_unref(drm);
 611         dev_set_drvdata(dev, NULL);
 612 }
 613
 614 static const struct component_master_ops rockchip_drm_ops = {
 615         .bind = rockchip_drm_bind,
 616         .unbind = rockchip_drm_unbind,
 617 };
 618
 619 static int rockchip_drm_platform_probe(struct platform_device *pdev)
 620 {
 621         struct device *dev = &pdev->dev;
 622         struct component_match *match = NULL;
 623         struct device_node *np = dev->of_node;
 624         struct device_node *port;
 625         int i;
 626
 627         if (!np)
 628                 return -ENODEV;
 629         /*
 630          * Bind the crtc ports first, so that
 631          * drm_of_find_possible_crtcs called from encoder .bind callbacks
 632          * works as expected.
 633          */
 634         for (i = 0;; i++) {
 635                 port = of_parse_phandle(np, "ports", i);
 636                 if (!port)
 637                         break;
 638
 639                 if (!of_device_is_available(port->parent)) {
 640                         of_node_put(port);
 641                         continue;
 642                 }
 643
 644                 component_match_add(dev, &match, compare_of, port->parent);
 645                 of_node_put(port);
 646         }
 647
 648         if (i == 0) {
 649                 dev_err(dev, "missing 'ports' property\n");
 650                 return -ENODEV;
 651         }
 652
 653         if (!match) {
 654                 dev_err(dev, "No available vop found for display-subsystem.\n");
 655                 return -ENODEV;
 656         }
 657         /*
 658          * For each bound crtc, bind the encoders attached to its
 659          * remote endpoint.
 660          */
 661         for (i = 0;; i++) {
 662                 port = of_parse_phandle(np, "ports", i);
 663                 if (!port)
 664                         break;
 665
 666                 if (!of_device_is_available(port->parent)) {
 667                         of_node_put(port);
 668                         continue;
 669                 }
 670
 671                 rockchip_add_endpoints(dev, &match, port);
 672                 of_node_put(port);
 673         }
 674
 675         return component_master_add_with_match(dev, &rockchip_drm_ops, match);
 676 }
 677
 678 static int rockchip_drm_platform_remove(struct platform_device *pdev)
 679 {
 680         component_master_del(&pdev->dev, &rockchip_drm_ops);
 681
 682         return 0;
 683 }
 684
 685 static const struct of_device_id rockchip_drm_dt_ids[] = {
 686         { .compatible = "rockchip,display-subsystem", },
 687         { /* sentinel */ },
 688 };
 689 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
 690
 691 static struct platform_driver rockchip_drm_platform_driver = {
 692         .probe = rockchip_drm_platform_probe,
 693         .remove = rockchip_drm_platform_remove,
 694         .driver = {
 695                 .name = "rockchip-drm",
 696                 .of_match_table = rockchip_drm_dt_ids,
 697                 .pm = &rockchip_drm_pm_ops,
 698         },
 699 };
 700
 701 module_platform_driver(rockchip_drm_platform_driver);
 702
 703 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
 704 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
 705 MODULE_LICENSE("GPL v2");