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 <drm/drmP.h>
  18 #include <drm/drm_atomic.h>
  19 #include <drm/drm_crtc_helper.h>
  20 #include <drm/drm_fb_helper.h>
  21 #include <drm/drm_sync_helper.h>
  22 #include <drm/rockchip_drm.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/dma-iommu.h>
  25 #include <linux/pm_runtime.h>
  26 #include <linux/memblock.h>
  27 #include <linux/module.h>
  28 #include <linux/of_address.h>
  29 #include <linux/of_graph.h>
  30 #include <linux/component.h>
  31 #include <linux/fence.h>
  32 #include <linux/console.h>
  33 #include <linux/iommu.h>
  34
  35 #include <drm/rockchip_drm.h>
  36
  37 #include "rockchip_drm_drv.h"
  38 #include "rockchip_drm_fb.h"
  39 #include "rockchip_drm_fbdev.h"
  40 #include "rockchip_drm_gem.h"
  41 #include "rockchip_drm_rga.h"
  42
  43 #define DRIVER_NAME     "rockchip"
  44 #define DRIVER_DESC     "RockChip Soc DRM"
  45 #define DRIVER_DATE     "20140818"
  46 #define DRIVER_MAJOR    1
  47 #define DRIVER_MINOR    0
  48
  49 static bool is_support_iommu = true;
  50
  51 static LIST_HEAD(rockchip_drm_subdrv_list);
  52 static DEFINE_MUTEX(subdrv_list_mutex);
  53 static struct drm_driver rockchip_drm_driver;
  54
  55 struct rockchip_drm_mode_set {
  56         struct list_head head;
  57         struct drm_framebuffer *fb;
  58         struct drm_connector *connector;
  59         struct drm_crtc *crtc;
  60         struct drm_display_mode *mode;
  61         int hdisplay;
  62         int vdisplay;
  63         int vrefresh;
  64
  65         bool mode_changed;
  66         bool ymirror;
  67         int ratio;
  68 };
  69
  70 static struct drm_crtc *find_crtc_by_node(struct drm_device *drm_dev,
  71                                           struct device_node *node)
  72 {
  73         struct device_node *np_crtc;
  74         struct drm_crtc *crtc;
  75
  76         np_crtc = of_get_parent(node);
  77         if (!np_crtc || !of_device_is_available(np_crtc))
  78                 return NULL;
  79
  80         drm_for_each_crtc(crtc, drm_dev) {
  81                 if (crtc->port == np_crtc)
  82                         return crtc;
  83         }
  84
  85         return NULL;
  86 }
  87
  88 static struct drm_connector *find_connector_by_node(struct drm_device *drm_dev,
  89                                                     struct device_node *node)
  90 {
  91         struct device_node *np_connector;
  92         struct drm_connector *connector;
  93
  94         np_connector = of_graph_get_remote_port_parent(node);
  95         if (!np_connector || !of_device_is_available(np_connector))
  96                 return NULL;
  97
  98         drm_for_each_connector(connector, drm_dev) {
  99                 if (connector->port == np_connector)
 100                         return connector;
 101         }
 102
 103         return NULL;
 104 }
 105
 106 static int init_loader_memory(struct drm_device *drm_dev)
 107 {
 108         struct rockchip_drm_private *private = drm_dev->dev_private;
 109         struct rockchip_logo *logo;
 110         struct device_node *np = drm_dev->dev->of_node;
 111         struct device_node *node;
 112         unsigned long nr_pages;
 113         struct page **pages;
 114         struct sg_table *sgt;
 115         phys_addr_t start, size;
 116         struct resource res;
 117         int i, ret;
 118
 119         logo = devm_kmalloc(drm_dev->dev, sizeof(*logo), GFP_KERNEL);
 120         if (!logo)
 121                 return -ENOMEM;
 122
 123         node = of_parse_phandle(np, "memory-region", 0);
 124         if (!node)
 125                 return -ENOMEM;
 126
 127         ret = of_address_to_resource(node, 0, &res);
 128         if (ret)
 129                 return ret;
 130         start = res.start;
 131         size = resource_size(&res);
 132         if (!size)
 133                 return -ENOMEM;
 134
 135         nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
 136         pages = kmalloc_array(nr_pages, sizeof(*pages), GFP_KERNEL);
 137         if (!pages)
 138                 return -ENOMEM;
 139         i = 0;
 140         while (i < nr_pages) {
 141                 pages[i] = phys_to_page(start);
 142                 start += PAGE_SIZE;
 143                 i++;
 144         }
 145         sgt = drm_prime_pages_to_sg(pages, nr_pages);
 146         if (IS_ERR(sgt)) {
 147                 ret = PTR_ERR(sgt);
 148                 goto err_free_pages;
 149         }
 150
 151         if (private->domain) {
 152                 memset(&logo->mm, 0, sizeof(logo->mm));
 153                 ret = drm_mm_insert_node_generic(&private->mm, &logo->mm,
 154                                                  size, PAGE_SIZE,
 155                                                  0, 0, 0);
 156                 if (ret < 0) {
 157                         DRM_ERROR("out of I/O virtual memory: %d\n", ret);
 158                         goto err_free_pages;
 159                 }
 160
 161                 logo->dma_addr = logo->mm.start;
 162
 163                 logo->iommu_map_size = iommu_map_sg(private->domain,
 164                                                     logo->dma_addr, sgt->sgl,
 165                                                     sgt->nents, IOMMU_READ);
 166                 if (logo->iommu_map_size < size) {
 167                         DRM_ERROR("failed to map buffer");
 168                         ret = -ENOMEM;
 169                         goto err_remove_node;
 170                 }
 171         } else {
 172                 dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, DMA_TO_DEVICE);
 173                 logo->dma_addr = sg_dma_address(sgt->sgl);
 174         }
 175
 176         logo->sgt = sgt;
 177         logo->start = res.start;
 178         logo->size = size;
 179         logo->count = 0;
 180         private->logo = logo;
 181
 182         return 0;
 183
 184 err_remove_node:
 185         drm_mm_remove_node(&logo->mm);
 186 err_free_pages:
 187         kfree(pages);
 188
 189         return ret;
 190 }
 191
 192 static struct drm_framebuffer *
 193 get_framebuffer_by_node(struct drm_device *drm_dev, struct device_node *node)
 194 {
 195         struct rockchip_drm_private *private = drm_dev->dev_private;
 196         struct drm_mode_fb_cmd2 mode_cmd = { 0 };
 197         u32 val;
 198         int bpp;
 199
 200         if (WARN_ON(!private->logo))
 201                 return NULL;
 202
 203         if (of_property_read_u32(node, "logo,offset", &val)) {
 204                 pr_err("%s: failed to get logo,offset\n", __func__);
 205                 return NULL;
 206         }
 207         mode_cmd.offsets[0] = val;
 208
 209         if (of_property_read_u32(node, "logo,width", &val)) {
 210                 pr_err("%s: failed to get logo,width\n", __func__);
 211                 return NULL;
 212         }
 213         mode_cmd.width = val;
 214
 215         if (of_property_read_u32(node, "logo,height", &val)) {
 216                 pr_err("%s: failed to get logo,height\n", __func__);
 217                 return NULL;
 218         }
 219         mode_cmd.height = val;
 220
 221         if (of_property_read_u32(node, "logo,bpp", &val)) {
 222                 pr_err("%s: failed to get logo,bpp\n", __func__);
 223                 return NULL;
 224         }
 225         bpp = val;
 226
 227         mode_cmd.pitches[0] = mode_cmd.width * bpp / 8;
 228
 229         switch (bpp) {
 230         case 16:
 231                 mode_cmd.pixel_format = DRM_FORMAT_BGR565;
 232                 break;
 233         case 24:
 234                 mode_cmd.pixel_format = DRM_FORMAT_BGR888;
 235                 break;
 236         case 32:
 237                 mode_cmd.pixel_format = DRM_FORMAT_XBGR8888;
 238                 break;
 239         default:
 240                 pr_err("%s: unsupport to logo bpp %d\n", __func__, bpp);
 241                 return NULL;
 242         }
 243
 244         return rockchip_fb_alloc(drm_dev, &mode_cmd, NULL, private->logo, 1);
 245 }
 246
 247 static struct rockchip_drm_mode_set *
 248 of_parse_display_resource(struct drm_device *drm_dev, struct device_node *route)
 249 {
 250         struct rockchip_drm_mode_set *set;
 251         struct device_node *connect;
 252         struct drm_framebuffer *fb;
 253         struct drm_connector *connector;
 254         struct drm_crtc *crtc;
 255         const char *string;
 256         u32 val;
 257
 258         connect = of_parse_phandle(route, "connect", 0);
 259         if (!connect)
 260                 return NULL;
 261
 262         fb = get_framebuffer_by_node(drm_dev, route);
 263         if (IS_ERR_OR_NULL(fb))
 264                 return NULL;
 265
 266         crtc = find_crtc_by_node(drm_dev, connect);
 267         connector = find_connector_by_node(drm_dev, connect);
 268         if (!crtc || !connector) {
 269                 dev_warn(drm_dev->dev,
 270                          "No available crtc or connector for display");
 271                 drm_framebuffer_unreference(fb);
 272                 return NULL;
 273         }
 274
 275         set = kzalloc(sizeof(*set), GFP_KERNEL);
 276         if (!set)
 277                 return NULL;
 278
 279         if (!of_property_read_u32(route, "video,hdisplay", &val))
 280                 set->hdisplay = val;
 281
 282         if (!of_property_read_u32(route, "video,vdisplay", &val))
 283                 set->vdisplay = val;
 284
 285         if (!of_property_read_u32(route, "video,vrefresh", &val))
 286                 set->vrefresh = val;
 287
 288         if (!of_property_read_u32(route, "logo,ymirror", &val))
 289                 set->ymirror = val;
 290
 291         set->ratio = 1;
 292         if (!of_property_read_string(route, "logo,mode", &string) &&
 293             !strcmp(string, "fullscreen"))
 294                         set->ratio = 0;
 295
 296         set->fb = fb;
 297         set->crtc = crtc;
 298         set->connector = connector;
 299
 300         return set;
 301 }
 302
 303 int setup_initial_state(struct drm_device *drm_dev,
 304                         struct drm_atomic_state *state,
 305                         struct rockchip_drm_mode_set *set)
 306 {
 307         struct drm_connector *connector = set->connector;
 308         struct drm_crtc *crtc = set->crtc;
 309         struct drm_crtc_state *crtc_state;
 310         struct drm_connector_state *conn_state;
 311         struct drm_plane_state *primary_state;
 312         struct drm_display_mode *mode = NULL;
 313         const struct drm_connector_helper_funcs *funcs;
 314         bool is_crtc_enabled = true;
 315         int hdisplay, vdisplay;
 316         int fb_width, fb_height;
 317         int found = 0, match = 0;
 318         int num_modes;
 319         int ret = 0;
 320
 321         if (!set->hdisplay || !set->vdisplay || !set->vrefresh)
 322                 is_crtc_enabled = false;
 323
 324         conn_state = drm_atomic_get_connector_state(state, connector);
 325         if (IS_ERR(conn_state))
 326                 return PTR_ERR(conn_state);
 327
 328         funcs = connector->helper_private;
 329         conn_state->best_encoder = funcs->best_encoder(connector);
 330         if (funcs->loader_protect)
 331                 funcs->loader_protect(connector, true);
 332         num_modes = connector->funcs->fill_modes(connector, 4096, 4096);
 333         if (!num_modes) {
 334                 dev_err(drm_dev->dev, "connector[%s] can't found any modes\n",
 335                         connector->name);
 336                 ret = -EINVAL;
 337                 goto error;
 338         }
 339
 340         list_for_each_entry(mode, &connector->modes, head) {
 341                 if (mode->hdisplay == set->hdisplay &&
 342                     mode->vdisplay == set->vdisplay &&
 343                     drm_mode_vrefresh(mode) == set->vrefresh) {
 344                         found = 1;
 345                         match = 1;
 346                         break;
 347                 }
 348         }
 349
 350         if (!found) {
 351                 list_for_each_entry(mode, &connector->modes, head) {
 352                         if (mode->type & DRM_MODE_TYPE_PREFERRED) {
 353                                 found = 1;
 354                                 break;
 355                         }
 356                 }
 357
 358                 if (!found) {
 359                         mode = list_first_entry_or_null(&connector->modes,
 360                                                         struct drm_display_mode,
 361                                                         head);
 362                         if (!mode) {
 363                                 pr_err("failed to find available modes\n");
 364                                 ret = -EINVAL;
 365                                 goto error;
 366                         }
 367                 }
 368         }
 369
 370         set->mode = mode;
 371         crtc_state = drm_atomic_get_crtc_state(state, crtc);
 372         if (IS_ERR(crtc_state)) {
 373                 ret = PTR_ERR(crtc_state);
 374                 goto error;
 375         }
 376
 377         drm_mode_copy(&crtc_state->adjusted_mode, mode);
 378         if (!match || !is_crtc_enabled) {
 379                 set->mode_changed = true;
 380         } else {
 381                 ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
 382                 if (ret)
 383                         goto error;
 384
 385                 ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
 386                 if (ret)
 387                         goto error;
 388
 389                 crtc_state->active = true;
 390         }
 391
 392         if (!set->fb) {
 393                 ret = 0;
 394                 goto error;
 395         }
 396         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 397         if (IS_ERR(primary_state)) {
 398                 ret = PTR_ERR(primary_state);
 399                 goto error;
 400         }
 401
 402         hdisplay = mode->hdisplay;
 403         vdisplay = mode->vdisplay;
 404         fb_width = set->fb->width;
 405         fb_height = set->fb->height;
 406
 407         primary_state->crtc = crtc;
 408         primary_state->src_x = 0;
 409         primary_state->src_y = 0;
 410         primary_state->src_w = fb_width << 16;
 411         primary_state->src_h = fb_height << 16;
 412         if (set->ratio) {
 413                 if (set->fb->width >= hdisplay) {
 414                         primary_state->crtc_x = 0;
 415                         primary_state->crtc_w = hdisplay;
 416                 } else {
 417                         primary_state->crtc_x = (hdisplay - fb_width) / 2;
 418                         primary_state->crtc_w = set->fb->width;
 419                 }
 420
 421                 if (set->fb->height >= vdisplay) {
 422                         primary_state->crtc_y = 0;
 423                         primary_state->crtc_h = vdisplay;
 424                 } else {
 425                         primary_state->crtc_y = (vdisplay - fb_height) / 2;
 426                         primary_state->crtc_h = fb_height;
 427                 }
 428         } else {
 429                 primary_state->crtc_x = 0;
 430                 primary_state->crtc_y = 0;
 431                 primary_state->crtc_w = hdisplay;
 432                 primary_state->crtc_h = vdisplay;
 433         }
 434
 435         return 0;
 436
 437 error:
 438         if (funcs->loader_protect)
 439                 funcs->loader_protect(connector, false);
 440         return ret;
 441 }
 442
 443 static int update_state(struct drm_device *drm_dev,
 444                         struct drm_atomic_state *state,
 445                         struct rockchip_drm_mode_set *set,
 446                         unsigned int *plane_mask)
 447 {
 448         struct drm_mode_config *mode_config = &drm_dev->mode_config;
 449         struct drm_crtc *crtc = set->crtc;
 450         struct drm_connector *connector = set->connector;
 451         struct drm_display_mode *mode = set->mode;
 452         struct drm_plane_state *primary_state;
 453         struct drm_crtc_state *crtc_state;
 454         struct drm_connector_state *conn_state;
 455         int ret;
 456
 457         crtc_state = drm_atomic_get_crtc_state(state, crtc);
 458         if (IS_ERR(crtc_state))
 459                 return PTR_ERR(crtc_state);
 460         conn_state = drm_atomic_get_connector_state(state, connector);
 461         if (IS_ERR(conn_state))
 462                 return PTR_ERR(conn_state);
 463
 464         if (set->mode_changed) {
 465                 ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
 466                 if (ret)
 467                         return ret;
 468
 469                 ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
 470                 if (ret)
 471                         return ret;
 472
 473                 crtc_state->active = true;
 474         } else {
 475                 const struct drm_encoder_helper_funcs *encoder_helper_funcs;
 476                 const struct drm_connector_helper_funcs *connector_helper_funcs;
 477                 struct rockchip_drm_private *priv = drm_dev->dev_private;
 478                 struct drm_encoder *encoder;
 479                 int pipe = drm_crtc_index(crtc);
 480
 481                 connector_helper_funcs = connector->helper_private;
 482                 if (!priv->crtc_funcs[pipe] ||
 483                     !priv->crtc_funcs[pipe]->loader_protect ||
 484                     !connector_helper_funcs ||
 485                     !connector_helper_funcs->best_encoder)
 486                         return -ENXIO;
 487                 encoder = connector_helper_funcs->best_encoder(connector);
 488                 if (!encoder)
 489                         return -ENXIO;
 490                 encoder_helper_funcs = encoder->helper_private;
 491                 if (!encoder_helper_funcs->atomic_check)
 492                         return -ENXIO;
 493                 ret = encoder_helper_funcs->atomic_check(encoder, crtc->state,
 494                                                          conn_state);
 495                 if (ret)
 496                         return ret;
 497                 if (encoder_helper_funcs->mode_set)
 498                         encoder_helper_funcs->mode_set(encoder, mode, mode);
 499                 priv->crtc_funcs[pipe]->loader_protect(crtc, true);
 500         }
 501
 502         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 503         if (IS_ERR(primary_state))
 504                 return PTR_ERR(primary_state);
 505
 506         crtc_state->plane_mask = 1 << drm_plane_index(crtc->primary);
 507         *plane_mask |= crtc_state->plane_mask;
 508
 509         drm_atomic_set_fb_for_plane(primary_state, set->fb);
 510         drm_framebuffer_unreference(set->fb);
 511         ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
 512
 513         if (set->ymirror)
 514                 /*
 515                  * TODO:
 516                  * some vop maybe not support ymirror, but force use it now.
 517                  */
 518                 drm_atomic_plane_set_property(crtc->primary, primary_state,
 519                                               mode_config->rotation_property,
 520                                               BIT(DRM_REFLECT_Y));
 521
 522         return ret;
 523 }
 524
 525 static void show_loader_logo(struct drm_device *drm_dev)
 526 {
 527         struct drm_atomic_state *state;
 528         struct device_node *np = drm_dev->dev->of_node;
 529         struct drm_mode_config *mode_config = &drm_dev->mode_config;
 530         struct device_node *root, *route;
 531         struct rockchip_drm_mode_set *set, *tmp;
 532         struct list_head mode_set_list;
 533         unsigned plane_mask = 0;
 534         int ret;
 535
 536         root = of_get_child_by_name(np, "route");
 537         if (!root) {
 538                 dev_warn(drm_dev->dev, "failed to parse display resources\n");
 539                 return;
 540         }
 541
 542         if (init_loader_memory(drm_dev)) {
 543                 dev_warn(drm_dev->dev, "failed to parse loader memory\n");
 544                 return;
 545         }
 546
 547         INIT_LIST_HEAD(&mode_set_list);
 548         drm_modeset_lock_all(drm_dev);
 549         state = drm_atomic_state_alloc(drm_dev);
 550         if (!state) {
 551                 dev_err(drm_dev->dev, "failed to alloc atomic state\n");
 552                 ret = -ENOMEM;
 553                 goto err_unlock;
 554         }
 555
 556         state->acquire_ctx = mode_config->acquire_ctx;
 557
 558         for_each_child_of_node(root, route) {
 559                 if (!of_device_is_available(route))
 560                         continue;
 561
 562                 set = of_parse_display_resource(drm_dev, route);
 563                 if (!set)
 564                         continue;
 565
 566                 if (setup_initial_state(drm_dev, state, set)) {
 567                         drm_framebuffer_unreference(set->fb);
 568                         kfree(set);
 569                         continue;
 570                 }
 571                 INIT_LIST_HEAD(&set->head);
 572                 list_add_tail(&set->head, &mode_set_list);
 573         }
 574
 575         if (list_empty(&mode_set_list)) {
 576                 dev_warn(drm_dev->dev, "can't not find any loader display\n");
 577                 ret = -ENXIO;
 578                 goto err_free_state;
 579         }
 580
 581         /*
 582          * The state save initial devices status, swap the state into
 583          * drm deivces as old state, so if new state come, can compare
 584          * with this state to judge which status need to update.
 585          */
 586         drm_atomic_helper_swap_state(drm_dev, state);
 587         drm_atomic_state_free(state);
 588         state = drm_atomic_helper_duplicate_state(drm_dev,
 589                                                   mode_config->acquire_ctx);
 590         if (IS_ERR(state)) {
 591                 dev_err(drm_dev->dev, "failed to duplicate atomic state\n");
 592                 ret = PTR_ERR_OR_ZERO(state);
 593                 goto err_unlock;
 594         }
 595         state->acquire_ctx = mode_config->acquire_ctx;
 596         list_for_each_entry(set, &mode_set_list, head)
 597                 /*
 598                  * We don't want to see any fail on update_state.
 599                  */
 600                 WARN_ON(update_state(drm_dev, state, set, &plane_mask));
 601
 602         ret = drm_atomic_commit(state);
 603         drm_atomic_clean_old_fb(drm_dev, plane_mask, ret);
 604
 605         list_for_each_entry_safe(set, tmp, &mode_set_list, head) {
 606                 struct drm_crtc *crtc = set->crtc;
 607
 608                 list_del(&set->head);
 609                 kfree(set);
 610
 611                 /* FIXME:
 612                  * primary plane state rotation is not BIT(0), but we only want
 613                  * it effect on logo display, userspace may not known to clean
 614                  * this property, would get unexpect display, so force set
 615                  * primary rotation to BIT(0).
 616                  */
 617                 if (!crtc->primary || !crtc->primary->state)
 618                         continue;
 619
 620                 drm_atomic_plane_set_property(crtc->primary,
 621                                               crtc->primary->state,
 622                                               mode_config->rotation_property,
 623                                               BIT(0));
 624         }
 625
 626         /*
 627          * Is possible get deadlock here?
 628          */
 629         WARN_ON(ret == -EDEADLK);
 630
 631         if (ret)
 632                 goto err_free_state;
 633
 634         drm_modeset_unlock_all(drm_dev);
 635         return;
 636
 637 err_free_state:
 638         drm_atomic_state_free(state);
 639 err_unlock:
 640         drm_modeset_unlock_all(drm_dev);
 641         if (ret)
 642                 dev_err(drm_dev->dev, "failed to show loader logo\n");
 643 }
 644
 645 /*
 646  * Attach a (component) device to the shared drm dma mapping from master drm
 647  * device.  This is used by the VOPs to map GEM buffers to a common DMA
 648  * mapping.
 649  */
 650 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
 651                                    struct device *dev)
 652 {
 653         struct rockchip_drm_private *private = drm_dev->dev_private;
 654         int ret;
 655
 656         if (!is_support_iommu)
 657                 return 0;
 658
 659         ret = iommu_attach_device(private->domain, dev);
 660         if (ret) {
 661                 dev_err(dev, "Failed to attach iommu device\n");
 662                 return ret;
 663         }
 664
 665         return 0;
 666 }
 667
 668 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
 669                                     struct device *dev)
 670 {
 671         struct rockchip_drm_private *private = drm_dev->dev_private;
 672         struct iommu_domain *domain = private->domain;
 673
 674         if (!is_support_iommu)
 675                 return;
 676
 677         iommu_detach_device(domain, dev);
 678 }
 679
 680 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
 681                                  const struct rockchip_crtc_funcs *crtc_funcs)
 682 {
 683         int pipe = drm_crtc_index(crtc);
 684         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 685
 686         if (pipe >= ROCKCHIP_MAX_CRTC)
 687                 return -EINVAL;
 688
 689         priv->crtc_funcs[pipe] = crtc_funcs;
 690
 691         return 0;
 692 }
 693
 694 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
 695 {
 696         int pipe = drm_crtc_index(crtc);
 697         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 698
 699         if (pipe >= ROCKCHIP_MAX_CRTC)
 700                 return;
 701
 702         priv->crtc_funcs[pipe] = NULL;
 703 }
 704
 705 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
 706                                                 int pipe)
 707 {
 708         struct drm_crtc *crtc;
 709         int i = 0;
 710
 711         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 712                 if (i++ == pipe)
 713                         return crtc;
 714
 715         return NULL;
 716 }
 717
 718 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
 719                                            unsigned int pipe)
 720 {
 721         struct rockchip_drm_private *priv = dev->dev_private;
 722         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 723
 724         if (crtc && priv->crtc_funcs[pipe] &&
 725             priv->crtc_funcs[pipe]->enable_vblank)
 726                 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
 727
 728         return 0;
 729 }
 730
 731 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
 732                                              unsigned int pipe)
 733 {
 734         struct rockchip_drm_private *priv = dev->dev_private;
 735         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 736
 737         if (crtc && priv->crtc_funcs[pipe] &&
 738             priv->crtc_funcs[pipe]->enable_vblank)
 739                 priv->crtc_funcs[pipe]->disable_vblank(crtc);
 740 }
 741
 742 static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
 743 {
 744         struct rockchip_drm_private *private = drm_dev->dev_private;
 745         struct iommu_domain_geometry *geometry;
 746         u64 start, end;
 747
 748         if (!is_support_iommu)
 749                 return 0;
 750
 751         private->domain = iommu_domain_alloc(&platform_bus_type);
 752         if (!private->domain)
 753                 return -ENOMEM;
 754
 755         geometry = &private->domain->geometry;
 756         start = geometry->aperture_start;
 757         end = geometry->aperture_end;
 758
 759         DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
 760                   start, end);
 761         drm_mm_init(&private->mm, start, end - start + 1);
 762         mutex_init(&private->mm_lock);
 763
 764         return 0;
 765 }
 766
 767 static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
 768 {
 769         struct rockchip_drm_private *private = drm_dev->dev_private;
 770
 771         if (!is_support_iommu)
 772                 return;
 773
 774         drm_mm_takedown(&private->mm);
 775         iommu_domain_free(private->domain);
 776 }
 777
 778 #ifdef CONFIG_DEBUG_FS
 779 static int rockchip_drm_mm_dump(struct seq_file *s, void *data)
 780 {
 781         struct drm_info_node *node = s->private;
 782         struct drm_minor *minor = node->minor;
 783         struct drm_device *drm_dev = minor->dev;
 784         struct rockchip_drm_private *priv = drm_dev->dev_private;
 785         int ret;
 786
 787         mutex_lock(&priv->mm_lock);
 788
 789         ret = drm_mm_dump_table(s, &priv->mm);
 790
 791         mutex_unlock(&priv->mm_lock);
 792
 793         return ret;
 794 }
 795
 796 static int rockchip_drm_summary_show(struct seq_file *s, void *data)
 797 {
 798         struct drm_info_node *node = s->private;
 799         struct drm_minor *minor = node->minor;
 800         struct drm_device *drm_dev = minor->dev;
 801         struct rockchip_drm_private *priv = drm_dev->dev_private;
 802         struct drm_crtc *crtc;
 803
 804         drm_for_each_crtc(crtc, drm_dev) {
 805                 int pipe = drm_crtc_index(crtc);
 806
 807                 if (priv->crtc_funcs[pipe] &&
 808                     priv->crtc_funcs[pipe]->debugfs_dump)
 809                         priv->crtc_funcs[pipe]->debugfs_dump(crtc, s);
 810         }
 811
 812         return 0;
 813 }
 814
 815 static struct drm_info_list rockchip_debugfs_files[] = {
 816         { "summary", rockchip_drm_summary_show, 0, NULL },
 817         { "mm_dump", rockchip_drm_mm_dump, 0, NULL },
 818 };
 819
 820 static int rockchip_drm_debugfs_init(struct drm_minor *minor)
 821 {
 822         struct drm_device *dev = minor->dev;
 823         int ret;
 824
 825         ret = drm_debugfs_create_files(rockchip_debugfs_files,
 826                                        ARRAY_SIZE(rockchip_debugfs_files),
 827                                        minor->debugfs_root,
 828                                        minor);
 829         if (ret) {
 830                 dev_err(dev->dev, "could not install rockchip_debugfs_list\n");
 831                 return ret;
 832         }
 833
 834         return 0;
 835 }
 836
 837 static void rockchip_drm_debugfs_cleanup(struct drm_minor *minor)
 838 {
 839         drm_debugfs_remove_files(rockchip_debugfs_files,
 840                                  ARRAY_SIZE(rockchip_debugfs_files), minor);
 841 }
 842 #endif
 843
 844 static int rockchip_drm_bind(struct device *dev)
 845 {
 846         struct drm_device *drm_dev;
 847         struct rockchip_drm_private *private;
 848         int ret;
 849
 850         drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
 851         if (!drm_dev)
 852                 return -ENOMEM;
 853
 854         ret = drm_dev_set_unique(drm_dev, "%s", dev_name(dev));
 855         if (ret)
 856                 goto err_free;
 857
 858         dev_set_drvdata(dev, drm_dev);
 859
 860         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 861         if (!private) {
 862                 ret = -ENOMEM;
 863                 goto err_free;
 864         }
 865
 866         mutex_init(&private->commit.lock);
 867         INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
 868
 869         drm_dev->dev_private = private;
 870
 871 #ifdef CONFIG_DRM_DMA_SYNC
 872         private->cpu_fence_context = fence_context_alloc(1);
 873         atomic_set(&private->cpu_fence_seqno, 0);
 874 #endif
 875
 876         drm_mode_config_init(drm_dev);
 877
 878         rockchip_drm_mode_config_init(drm_dev);
 879
 880         ret = rockchip_drm_init_iommu(drm_dev);
 881         if (ret)
 882                 goto err_config_cleanup;
 883
 884         /* Try to bind all sub drivers. */
 885         ret = component_bind_all(dev, drm_dev);
 886         if (ret)
 887                 goto err_iommu_cleanup;
 888
 889         /* init kms poll for handling hpd */
 890         drm_kms_helper_poll_init(drm_dev);
 891
 892         /*
 893          * enable drm irq mode.
 894          * - with irq_enabled = true, we can use the vblank feature.
 895          */
 896         drm_dev->irq_enabled = true;
 897
 898         ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
 899         if (ret)
 900                 goto err_kms_helper_poll_fini;
 901
 902         /*
 903          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 904          * by drm timer once a current process gives up ownership of
 905          * vblank event.(after drm_vblank_put function is called)
 906          */
 907         drm_dev->vblank_disable_allowed = true;
 908
 909         drm_mode_config_reset(drm_dev);
 910
 911         show_loader_logo(drm_dev);
 912
 913         ret = rockchip_drm_fbdev_init(drm_dev);
 914         if (ret)
 915                 goto err_vblank_cleanup;
 916
 917         drm_dev->mode_config.allow_fb_modifiers = true;
 918
 919         ret = drm_dev_register(drm_dev, 0);
 920         if (ret)
 921                 goto err_fbdev_fini;
 922
 923         return 0;
 924 err_fbdev_fini:
 925         rockchip_drm_fbdev_fini(drm_dev);
 926 err_vblank_cleanup:
 927         drm_vblank_cleanup(drm_dev);
 928 err_kms_helper_poll_fini:
 929         drm_kms_helper_poll_fini(drm_dev);
 930         component_unbind_all(dev, drm_dev);
 931 err_iommu_cleanup:
 932         rockchip_iommu_cleanup(drm_dev);
 933 err_config_cleanup:
 934         drm_mode_config_cleanup(drm_dev);
 935         drm_dev->dev_private = NULL;
 936 err_free:
 937         drm_dev_unref(drm_dev);
 938         return ret;
 939 }
 940
 941 static void rockchip_drm_unbind(struct device *dev)
 942 {
 943         struct drm_device *drm_dev = dev_get_drvdata(dev);
 944
 945         rockchip_drm_fbdev_fini(drm_dev);
 946         drm_vblank_cleanup(drm_dev);
 947         drm_kms_helper_poll_fini(drm_dev);
 948         component_unbind_all(dev, drm_dev);
 949         rockchip_iommu_cleanup(drm_dev);
 950         drm_mode_config_cleanup(drm_dev);
 951         drm_dev->dev_private = NULL;
 952         drm_dev_unregister(drm_dev);
 953         drm_dev_unref(drm_dev);
 954         dev_set_drvdata(dev, NULL);
 955 }
 956
 957 static void rockchip_drm_crtc_cancel_pending_vblank(struct drm_crtc *crtc,
 958                                                     struct drm_file *file_priv)
 959 {
 960         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 961         int pipe = drm_crtc_index(crtc);
 962
 963         if (pipe < ROCKCHIP_MAX_CRTC &&
 964             priv->crtc_funcs[pipe] &&
 965             priv->crtc_funcs[pipe]->cancel_pending_vblank)
 966                 priv->crtc_funcs[pipe]->cancel_pending_vblank(crtc, file_priv);
 967 }
 968
 969 int rockchip_drm_register_subdrv(struct drm_rockchip_subdrv *subdrv)
 970 {
 971         if (!subdrv)
 972                 return -EINVAL;
 973
 974         mutex_lock(&subdrv_list_mutex);
 975         list_add_tail(&subdrv->list, &rockchip_drm_subdrv_list);
 976         mutex_unlock(&subdrv_list_mutex);
 977
 978         return 0;
 979 }
 980 EXPORT_SYMBOL_GPL(rockchip_drm_register_subdrv);
 981
 982 int rockchip_drm_unregister_subdrv(struct drm_rockchip_subdrv *subdrv)
 983 {
 984         if (!subdrv)
 985                 return -EINVAL;
 986
 987         mutex_lock(&subdrv_list_mutex);
 988         list_del(&subdrv->list);
 989         mutex_unlock(&subdrv_list_mutex);
 990
 991         return 0;
 992 }
 993 EXPORT_SYMBOL_GPL(rockchip_drm_unregister_subdrv);
 994
 995 static int rockchip_drm_open(struct drm_device *dev, struct drm_file *file)
 996 {
 997         struct rockchip_drm_file_private *file_priv;
 998         struct drm_rockchip_subdrv *subdrv;
 999         int ret = 0;
1000
1001         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
1002         if (!file_priv)
1003                 return -ENOMEM;
1004         INIT_LIST_HEAD(&file_priv->gem_cpu_acquire_list);
1005
1006         file->driver_priv = file_priv;
1007
1008         mutex_lock(&subdrv_list_mutex);
1009         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list) {
1010                 ret = subdrv->open(dev, subdrv->dev, file);
1011                 if (ret) {
1012                         mutex_unlock(&subdrv_list_mutex);
1013                         goto err_free_file_priv;
1014                 }
1015         }
1016         mutex_unlock(&subdrv_list_mutex);
1017
1018         return 0;
1019
1020 err_free_file_priv:
1021         kfree(file_priv);
1022         file_priv = NULL;
1023
1024         return ret;
1025 }
1026
1027 static void rockchip_drm_preclose(struct drm_device *dev,
1028                                   struct drm_file *file_priv)
1029 {
1030         struct rockchip_drm_file_private *file_private = file_priv->driver_priv;
1031         struct rockchip_gem_object_node *cur, *d;
1032         struct drm_rockchip_subdrv *subdrv;
1033         struct drm_crtc *crtc;
1034
1035         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
1036                 rockchip_drm_crtc_cancel_pending_vblank(crtc, file_priv);
1037
1038         mutex_lock(&dev->struct_mutex);
1039         list_for_each_entry_safe(cur, d,
1040                         &file_private->gem_cpu_acquire_list, list) {
1041 #ifdef CONFIG_DRM_DMA_SYNC
1042                 BUG_ON(!cur->rockchip_gem_obj->acquire_fence);
1043                 drm_fence_signal_and_put(&cur->rockchip_gem_obj->acquire_fence);
1044 #endif
1045                 drm_gem_object_unreference(&cur->rockchip_gem_obj->base);
1046                 kfree(cur);
1047         }
1048         /* since we are deleting the whole list, just initialize the header
1049          * instead of calling list_del for every element
1050          */
1051         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
1052         mutex_unlock(&dev->struct_mutex);
1053
1054         mutex_lock(&subdrv_list_mutex);
1055         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list)
1056                 subdrv->close(dev, subdrv->dev, file_priv);
1057         mutex_unlock(&subdrv_list_mutex);
1058 }
1059
1060 static void rockchip_drm_postclose(struct drm_device *dev, struct drm_file *file)
1061 {
1062         kfree(file->driver_priv);
1063         file->driver_priv = NULL;
1064 }
1065
1066 void rockchip_drm_lastclose(struct drm_device *dev)
1067 {
1068         struct rockchip_drm_private *priv = dev->dev_private;
1069
1070         drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev_helper);
1071 }
1072
1073 static const struct drm_ioctl_desc rockchip_ioctls[] = {
1074         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CREATE, rockchip_gem_create_ioctl,
1075                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1076         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_MAP_OFFSET,
1077                           rockchip_gem_map_offset_ioctl,
1078                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1079         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_ACQUIRE,
1080                           rockchip_gem_cpu_acquire_ioctl,
1081                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1082         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_RELEASE,
1083                           rockchip_gem_cpu_release_ioctl,
1084                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1085         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_GET_VER, rockchip_rga_get_ver_ioctl,
1086                           DRM_AUTH | DRM_RENDER_ALLOW),
1087         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_SET_CMDLIST,
1088                           rockchip_rga_set_cmdlist_ioctl,
1089                           DRM_AUTH | DRM_RENDER_ALLOW),
1090         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_EXEC, rockchip_rga_exec_ioctl,
1091                           DRM_AUTH | DRM_RENDER_ALLOW),
1092 };
1093
1094 static const struct file_operations rockchip_drm_driver_fops = {
1095         .owner = THIS_MODULE,
1096         .open = drm_open,
1097         .mmap = rockchip_gem_mmap,
1098         .poll = drm_poll,
1099         .read = drm_read,
1100         .unlocked_ioctl = drm_ioctl,
1101 #ifdef CONFIG_COMPAT
1102         .compat_ioctl = drm_compat_ioctl,
1103 #endif
1104         .release = drm_release,
1105 };
1106
1107 const struct vm_operations_struct rockchip_drm_vm_ops = {
1108         .open = drm_gem_vm_open,
1109         .close = drm_gem_vm_close,
1110 };
1111
1112 static struct drm_driver rockchip_drm_driver = {
1113         .driver_features        = DRIVER_MODESET | DRIVER_GEM |
1114                                   DRIVER_PRIME | DRIVER_ATOMIC |
1115                                   DRIVER_RENDER,
1116         .preclose               = rockchip_drm_preclose,
1117         .lastclose              = rockchip_drm_lastclose,
1118         .get_vblank_counter     = drm_vblank_no_hw_counter,
1119         .open                   = rockchip_drm_open,
1120         .postclose              = rockchip_drm_postclose,
1121         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
1122         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
1123         .gem_vm_ops             = &rockchip_drm_vm_ops,
1124         .gem_free_object        = rockchip_gem_free_object,
1125         .dumb_create            = rockchip_gem_dumb_create,
1126         .dumb_map_offset        = rockchip_gem_dumb_map_offset,
1127         .dumb_destroy           = drm_gem_dumb_destroy,
1128         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
1129         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
1130         .gem_prime_import       = drm_gem_prime_import,
1131         .gem_prime_export       = drm_gem_prime_export,
1132         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
1133         .gem_prime_import_sg_table      = rockchip_gem_prime_import_sg_table,
1134         .gem_prime_vmap         = rockchip_gem_prime_vmap,
1135         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
1136         .gem_prime_mmap         = rockchip_gem_mmap_buf,
1137 #ifdef CONFIG_DEBUG_FS
1138         .debugfs_init           = rockchip_drm_debugfs_init,
1139         .debugfs_cleanup        = rockchip_drm_debugfs_cleanup,
1140 #endif
1141         .ioctls                 = rockchip_ioctls,
1142         .num_ioctls             = ARRAY_SIZE(rockchip_ioctls),
1143         .fops                   = &rockchip_drm_driver_fops,
1144         .name   = DRIVER_NAME,
1145         .desc   = DRIVER_DESC,
1146         .date   = DRIVER_DATE,
1147         .major  = DRIVER_MAJOR,
1148         .minor  = DRIVER_MINOR,
1149 };
1150
1151 #ifdef CONFIG_PM_SLEEP
1152 void rockchip_drm_fb_suspend(struct drm_device *drm)
1153 {
1154         struct rockchip_drm_private *priv = drm->dev_private;
1155
1156         console_lock();
1157         drm_fb_helper_set_suspend(priv->fbdev_helper, 1);
1158         console_unlock();
1159 }
1160
1161 void rockchip_drm_fb_resume(struct drm_device *drm)
1162 {
1163         struct rockchip_drm_private *priv = drm->dev_private;
1164
1165         console_lock();
1166         drm_fb_helper_set_suspend(priv->fbdev_helper, 0);
1167         console_unlock();
1168 }
1169
1170 static int rockchip_drm_sys_suspend(struct device *dev)
1171 {
1172         struct drm_device *drm = dev_get_drvdata(dev);
1173         struct rockchip_drm_private *priv = drm->dev_private;
1174
1175         drm_kms_helper_poll_disable(drm);
1176         rockchip_drm_fb_suspend(drm);
1177
1178         priv->state = drm_atomic_helper_suspend(drm);
1179         if (IS_ERR(priv->state)) {
1180                 rockchip_drm_fb_resume(drm);
1181                 drm_kms_helper_poll_enable(drm);
1182                 return PTR_ERR(priv->state);
1183         }
1184
1185         return 0;
1186 }
1187
1188 static int rockchip_drm_sys_resume(struct device *dev)
1189 {
1190         struct drm_device *drm = dev_get_drvdata(dev);
1191         struct rockchip_drm_private *priv = drm->dev_private;
1192
1193         drm_atomic_helper_resume(drm, priv->state);
1194         rockchip_drm_fb_resume(drm);
1195         drm_kms_helper_poll_enable(drm);
1196
1197         return 0;
1198 }
1199 #endif
1200
1201 static const struct dev_pm_ops rockchip_drm_pm_ops = {
1202         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
1203                                 rockchip_drm_sys_resume)
1204 };
1205
1206 static int compare_of(struct device *dev, void *data)
1207 {
1208         struct device_node *np = data;
1209
1210         return dev->of_node == np;
1211 }
1212
1213 static void rockchip_add_endpoints(struct device *dev,
1214                                    struct component_match **match,
1215                                    struct device_node *port)
1216 {
1217         struct device_node *ep, *remote;
1218
1219         for_each_child_of_node(port, ep) {
1220                 remote = of_graph_get_remote_port_parent(ep);
1221                 if (!remote || !of_device_is_available(remote)) {
1222                         of_node_put(remote);
1223                         continue;
1224                 } else if (!of_device_is_available(remote->parent)) {
1225                         dev_warn(dev, "parent device of %s is not available\n",
1226                                  remote->full_name);
1227                         of_node_put(remote);
1228                         continue;
1229                 }
1230
1231                 component_match_add(dev, match, compare_of, remote);
1232                 of_node_put(remote);
1233         }
1234 }
1235
1236 static const struct component_master_ops rockchip_drm_ops = {
1237         .bind = rockchip_drm_bind,
1238         .unbind = rockchip_drm_unbind,
1239 };
1240
1241 static int rockchip_drm_platform_probe(struct platform_device *pdev)
1242 {
1243         struct device *dev = &pdev->dev;
1244         struct component_match *match = NULL;
1245         struct device_node *np = dev->of_node;
1246         struct device_node *port;
1247         int i;
1248
1249         if (!np)
1250                 return -ENODEV;
1251         /*
1252          * Bind the crtc ports first, so that
1253          * drm_of_find_possible_crtcs called from encoder .bind callbacks
1254          * works as expected.
1255          */
1256         for (i = 0;; i++) {
1257                 struct device_node *iommu;
1258
1259                 port = of_parse_phandle(np, "ports", i);
1260                 if (!port)
1261                         break;
1262
1263                 if (!of_device_is_available(port->parent)) {
1264                         of_node_put(port);
1265                         continue;
1266                 }
1267
1268                 iommu = of_parse_phandle(port->parent, "iommus", 0);
1269                 if (!iommu || !of_device_is_available(iommu->parent)) {
1270                         dev_dbg(dev, "no iommu attached for %s, using non-iommu buffers\n",
1271                                 port->parent->full_name);
1272                         /*
1273                          * if there is a crtc not support iommu, force set all
1274                          * crtc use non-iommu buffer.
1275                          */
1276                         is_support_iommu = false;
1277                 }
1278
1279                 component_match_add(dev, &match, compare_of, port->parent);
1280                 of_node_put(port);
1281         }
1282
1283         if (i == 0) {
1284                 dev_err(dev, "missing 'ports' property\n");
1285                 return -ENODEV;
1286         }
1287
1288         if (!match) {
1289                 dev_err(dev, "No available vop found for display-subsystem.\n");
1290                 return -ENODEV;
1291         }
1292         /*
1293          * For each bound crtc, bind the encoders attached to its
1294          * remote endpoint.
1295          */
1296         for (i = 0;; i++) {
1297                 port = of_parse_phandle(np, "ports", i);
1298                 if (!port)
1299                         break;
1300
1301                 if (!of_device_is_available(port->parent)) {
1302                         of_node_put(port);
1303                         continue;
1304                 }
1305
1306                 rockchip_add_endpoints(dev, &match, port);
1307                 of_node_put(port);
1308         }
1309
1310         return component_master_add_with_match(dev, &rockchip_drm_ops, match);
1311 }
1312
1313 static int rockchip_drm_platform_remove(struct platform_device *pdev)
1314 {
1315         component_master_del(&pdev->dev, &rockchip_drm_ops);
1316
1317         return 0;
1318 }
1319
1320 static const struct of_device_id rockchip_drm_dt_ids[] = {
1321         { .compatible = "rockchip,display-subsystem", },
1322         { /* sentinel */ },
1323 };
1324 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
1325
1326 static struct platform_driver rockchip_drm_platform_driver = {
1327         .probe = rockchip_drm_platform_probe,
1328         .remove = rockchip_drm_platform_remove,
1329         .driver = {
1330                 .name = "rockchip-drm",
1331                 .of_match_table = rockchip_drm_dt_ids,
1332                 .pm = &rockchip_drm_pm_ops,
1333         },
1334 };
1335
1336 module_platform_driver(rockchip_drm_platform_driver);
1337
1338 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
1339 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
1340 MODULE_LICENSE("GPL v2");