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         connector->loader_protect = true;
 333         num_modes = connector->funcs->fill_modes(connector, 4096, 4096);
 334         if (!num_modes) {
 335                 dev_err(drm_dev->dev, "connector[%s] can't found any modes\n",
 336                         connector->name);
 337                 ret = -EINVAL;
 338                 goto error;
 339         }
 340
 341         list_for_each_entry(mode, &connector->modes, head) {
 342                 if (mode->hdisplay == set->hdisplay &&
 343                     mode->vdisplay == set->vdisplay &&
 344                     drm_mode_vrefresh(mode) == set->vrefresh) {
 345                         found = 1;
 346                         match = 1;
 347                         break;
 348                 }
 349         }
 350
 351         if (!found) {
 352                 list_for_each_entry(mode, &connector->modes, head) {
 353                         if (mode->type & DRM_MODE_TYPE_PREFERRED) {
 354                                 found = 1;
 355                                 break;
 356                         }
 357                 }
 358
 359                 if (!found) {
 360                         mode = list_first_entry_or_null(&connector->modes,
 361                                                         struct drm_display_mode,
 362                                                         head);
 363                         if (!mode) {
 364                                 pr_err("failed to find available modes\n");
 365                                 ret = -EINVAL;
 366                                 goto error;
 367                         }
 368                 }
 369         }
 370
 371         set->mode = mode;
 372         crtc_state = drm_atomic_get_crtc_state(state, crtc);
 373         if (IS_ERR(crtc_state)) {
 374                 ret = PTR_ERR(crtc_state);
 375                 goto error;
 376         }
 377
 378         drm_mode_copy(&crtc_state->adjusted_mode, mode);
 379         if (!match || !is_crtc_enabled) {
 380                 set->mode_changed = true;
 381         } else {
 382                 ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
 383                 if (ret)
 384                         goto error;
 385
 386                 ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
 387                 if (ret)
 388                         goto error;
 389
 390                 crtc_state->active = true;
 391         }
 392
 393         if (!set->fb) {
 394                 ret = 0;
 395                 goto error;
 396         }
 397         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 398         if (IS_ERR(primary_state)) {
 399                 ret = PTR_ERR(primary_state);
 400                 goto error;
 401         }
 402
 403         hdisplay = mode->hdisplay;
 404         vdisplay = mode->vdisplay;
 405         fb_width = set->fb->width;
 406         fb_height = set->fb->height;
 407
 408         primary_state->crtc = crtc;
 409         primary_state->src_x = 0;
 410         primary_state->src_y = 0;
 411         primary_state->src_w = fb_width << 16;
 412         primary_state->src_h = fb_height << 16;
 413         if (set->ratio) {
 414                 if (set->fb->width >= hdisplay) {
 415                         primary_state->crtc_x = 0;
 416                         primary_state->crtc_w = hdisplay;
 417                 } else {
 418                         primary_state->crtc_x = (hdisplay - fb_width) / 2;
 419                         primary_state->crtc_w = set->fb->width;
 420                 }
 421
 422                 if (set->fb->height >= vdisplay) {
 423                         primary_state->crtc_y = 0;
 424                         primary_state->crtc_h = vdisplay;
 425                 } else {
 426                         primary_state->crtc_y = (vdisplay - fb_height) / 2;
 427                         primary_state->crtc_h = fb_height;
 428                 }
 429         } else {
 430                 primary_state->crtc_x = 0;
 431                 primary_state->crtc_y = 0;
 432                 primary_state->crtc_w = hdisplay;
 433                 primary_state->crtc_h = vdisplay;
 434         }
 435
 436         return 0;
 437
 438 error:
 439         if (funcs->loader_protect)
 440                 funcs->loader_protect(connector, false);
 441         connector->loader_protect = false;
 442         return ret;
 443 }
 444
 445 static int update_state(struct drm_device *drm_dev,
 446                         struct drm_atomic_state *state,
 447                         struct rockchip_drm_mode_set *set,
 448                         unsigned int *plane_mask)
 449 {
 450         struct drm_mode_config *mode_config = &drm_dev->mode_config;
 451         struct drm_crtc *crtc = set->crtc;
 452         struct drm_connector *connector = set->connector;
 453         struct drm_display_mode *mode = set->mode;
 454         struct drm_plane_state *primary_state;
 455         struct drm_crtc_state *crtc_state;
 456         struct drm_connector_state *conn_state;
 457         int ret;
 458
 459         crtc_state = drm_atomic_get_crtc_state(state, crtc);
 460         if (IS_ERR(crtc_state))
 461                 return PTR_ERR(crtc_state);
 462         conn_state = drm_atomic_get_connector_state(state, connector);
 463         if (IS_ERR(conn_state))
 464                 return PTR_ERR(conn_state);
 465
 466         if (set->mode_changed) {
 467                 ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
 468                 if (ret)
 469                         return ret;
 470
 471                 ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
 472                 if (ret)
 473                         return ret;
 474
 475                 crtc_state->active = true;
 476         } else {
 477                 const struct drm_encoder_helper_funcs *encoder_helper_funcs;
 478                 const struct drm_connector_helper_funcs *connector_helper_funcs;
 479                 struct rockchip_drm_private *priv = drm_dev->dev_private;
 480                 struct drm_encoder *encoder;
 481                 int pipe = drm_crtc_index(crtc);
 482
 483                 connector_helper_funcs = connector->helper_private;
 484                 if (!priv->crtc_funcs[pipe] ||
 485                     !priv->crtc_funcs[pipe]->loader_protect ||
 486                     !connector_helper_funcs ||
 487                     !connector_helper_funcs->best_encoder)
 488                         return -ENXIO;
 489                 encoder = connector_helper_funcs->best_encoder(connector);
 490                 if (!encoder)
 491                         return -ENXIO;
 492                 encoder_helper_funcs = encoder->helper_private;
 493                 if (!encoder_helper_funcs->atomic_check)
 494                         return -ENXIO;
 495                 ret = encoder_helper_funcs->atomic_check(encoder, crtc->state,
 496                                                          conn_state);
 497                 if (ret)
 498                         return ret;
 499                 if (encoder_helper_funcs->mode_set)
 500                         encoder_helper_funcs->mode_set(encoder, mode, mode);
 501                 priv->crtc_funcs[pipe]->loader_protect(crtc, true);
 502         }
 503
 504         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 505         if (IS_ERR(primary_state))
 506                 return PTR_ERR(primary_state);
 507
 508         crtc_state->plane_mask = 1 << drm_plane_index(crtc->primary);
 509         *plane_mask |= crtc_state->plane_mask;
 510
 511         drm_atomic_set_fb_for_plane(primary_state, set->fb);
 512         drm_framebuffer_unreference(set->fb);
 513         ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
 514
 515         if (set->ymirror)
 516                 /*
 517                  * TODO:
 518                  * some vop maybe not support ymirror, but force use it now.
 519                  */
 520                 drm_atomic_plane_set_property(crtc->primary, primary_state,
 521                                               mode_config->rotation_property,
 522                                               BIT(DRM_REFLECT_Y));
 523
 524         return ret;
 525 }
 526
 527 static void show_loader_logo(struct drm_device *drm_dev)
 528 {
 529         struct drm_atomic_state *state;
 530         struct device_node *np = drm_dev->dev->of_node;
 531         struct drm_mode_config *mode_config = &drm_dev->mode_config;
 532         struct device_node *root, *route;
 533         struct rockchip_drm_mode_set *set, *tmp;
 534         struct list_head mode_set_list;
 535         unsigned plane_mask = 0;
 536         int ret;
 537
 538         root = of_get_child_by_name(np, "route");
 539         if (!root) {
 540                 dev_warn(drm_dev->dev, "failed to parse display resources\n");
 541                 return;
 542         }
 543
 544         if (init_loader_memory(drm_dev)) {
 545                 dev_warn(drm_dev->dev, "failed to parse loader memory\n");
 546                 return;
 547         }
 548
 549         INIT_LIST_HEAD(&mode_set_list);
 550         drm_modeset_lock_all(drm_dev);
 551         state = drm_atomic_state_alloc(drm_dev);
 552         if (!state) {
 553                 dev_err(drm_dev->dev, "failed to alloc atomic state\n");
 554                 ret = -ENOMEM;
 555                 goto err_unlock;
 556         }
 557
 558         state->acquire_ctx = mode_config->acquire_ctx;
 559
 560         for_each_child_of_node(root, route) {
 561                 if (!of_device_is_available(route))
 562                         continue;
 563
 564                 set = of_parse_display_resource(drm_dev, route);
 565                 if (!set)
 566                         continue;
 567
 568                 if (setup_initial_state(drm_dev, state, set)) {
 569                         drm_framebuffer_unreference(set->fb);
 570                         kfree(set);
 571                         continue;
 572                 }
 573                 INIT_LIST_HEAD(&set->head);
 574                 list_add_tail(&set->head, &mode_set_list);
 575         }
 576
 577         if (list_empty(&mode_set_list)) {
 578                 dev_warn(drm_dev->dev, "can't not find any loader display\n");
 579                 ret = -ENXIO;
 580                 goto err_free_state;
 581         }
 582
 583         /*
 584          * The state save initial devices status, swap the state into
 585          * drm deivces as old state, so if new state come, can compare
 586          * with this state to judge which status need to update.
 587          */
 588         drm_atomic_helper_swap_state(drm_dev, state);
 589         drm_atomic_state_free(state);
 590         state = drm_atomic_helper_duplicate_state(drm_dev,
 591                                                   mode_config->acquire_ctx);
 592         if (IS_ERR(state)) {
 593                 dev_err(drm_dev->dev, "failed to duplicate atomic state\n");
 594                 ret = PTR_ERR_OR_ZERO(state);
 595                 goto err_unlock;
 596         }
 597         state->acquire_ctx = mode_config->acquire_ctx;
 598         list_for_each_entry(set, &mode_set_list, head)
 599                 /*
 600                  * We don't want to see any fail on update_state.
 601                  */
 602                 WARN_ON(update_state(drm_dev, state, set, &plane_mask));
 603
 604         ret = drm_atomic_commit(state);
 605         drm_atomic_clean_old_fb(drm_dev, plane_mask, ret);
 606
 607         list_for_each_entry_safe(set, tmp, &mode_set_list, head) {
 608                 struct drm_crtc *crtc = set->crtc;
 609
 610                 list_del(&set->head);
 611                 kfree(set);
 612
 613                 /* FIXME:
 614                  * primary plane state rotation is not BIT(0), but we only want
 615                  * it effect on logo display, userspace may not known to clean
 616                  * this property, would get unexpect display, so force set
 617                  * primary rotation to BIT(0).
 618                  */
 619                 if (!crtc->primary || !crtc->primary->state)
 620                         continue;
 621
 622                 drm_atomic_plane_set_property(crtc->primary,
 623                                               crtc->primary->state,
 624                                               mode_config->rotation_property,
 625                                               BIT(0));
 626         }
 627
 628         /*
 629          * Is possible get deadlock here?
 630          */
 631         WARN_ON(ret == -EDEADLK);
 632
 633         if (ret)
 634                 goto err_free_state;
 635
 636         drm_modeset_unlock_all(drm_dev);
 637         return;
 638
 639 err_free_state:
 640         drm_atomic_state_free(state);
 641 err_unlock:
 642         drm_modeset_unlock_all(drm_dev);
 643         if (ret)
 644                 dev_err(drm_dev->dev, "failed to show loader logo\n");
 645 }
 646
 647 /*
 648  * Attach a (component) device to the shared drm dma mapping from master drm
 649  * device.  This is used by the VOPs to map GEM buffers to a common DMA
 650  * mapping.
 651  */
 652 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
 653                                    struct device *dev)
 654 {
 655         struct rockchip_drm_private *private = drm_dev->dev_private;
 656         int ret;
 657
 658         if (!is_support_iommu)
 659                 return 0;
 660
 661         ret = iommu_attach_device(private->domain, dev);
 662         if (ret) {
 663                 dev_err(dev, "Failed to attach iommu device\n");
 664                 return ret;
 665         }
 666
 667         return 0;
 668 }
 669
 670 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
 671                                     struct device *dev)
 672 {
 673         struct rockchip_drm_private *private = drm_dev->dev_private;
 674         struct iommu_domain *domain = private->domain;
 675
 676         if (!is_support_iommu)
 677                 return;
 678
 679         iommu_detach_device(domain, dev);
 680 }
 681
 682 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
 683                                  const struct rockchip_crtc_funcs *crtc_funcs)
 684 {
 685         int pipe = drm_crtc_index(crtc);
 686         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 687
 688         if (pipe >= ROCKCHIP_MAX_CRTC)
 689                 return -EINVAL;
 690
 691         priv->crtc_funcs[pipe] = crtc_funcs;
 692
 693         return 0;
 694 }
 695
 696 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
 697 {
 698         int pipe = drm_crtc_index(crtc);
 699         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 700
 701         if (pipe >= ROCKCHIP_MAX_CRTC)
 702                 return;
 703
 704         priv->crtc_funcs[pipe] = NULL;
 705 }
 706
 707 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
 708                                                 int pipe)
 709 {
 710         struct drm_crtc *crtc;
 711         int i = 0;
 712
 713         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 714                 if (i++ == pipe)
 715                         return crtc;
 716
 717         return NULL;
 718 }
 719
 720 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
 721                                            unsigned int pipe)
 722 {
 723         struct rockchip_drm_private *priv = dev->dev_private;
 724         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 725
 726         if (crtc && priv->crtc_funcs[pipe] &&
 727             priv->crtc_funcs[pipe]->enable_vblank)
 728                 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
 729
 730         return 0;
 731 }
 732
 733 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
 734                                              unsigned int pipe)
 735 {
 736         struct rockchip_drm_private *priv = dev->dev_private;
 737         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 738
 739         if (crtc && priv->crtc_funcs[pipe] &&
 740             priv->crtc_funcs[pipe]->enable_vblank)
 741                 priv->crtc_funcs[pipe]->disable_vblank(crtc);
 742 }
 743
 744 static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
 745 {
 746         struct rockchip_drm_private *private = drm_dev->dev_private;
 747         struct iommu_domain_geometry *geometry;
 748         u64 start, end;
 749
 750         if (!is_support_iommu)
 751                 return 0;
 752
 753         private->domain = iommu_domain_alloc(&platform_bus_type);
 754         if (!private->domain)
 755                 return -ENOMEM;
 756
 757         geometry = &private->domain->geometry;
 758         start = geometry->aperture_start;
 759         end = geometry->aperture_end;
 760
 761         DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
 762                   start, end);
 763         drm_mm_init(&private->mm, start, end - start + 1);
 764         mutex_init(&private->mm_lock);
 765
 766         return 0;
 767 }
 768
 769 static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
 770 {
 771         struct rockchip_drm_private *private = drm_dev->dev_private;
 772
 773         if (!is_support_iommu)
 774                 return;
 775
 776         drm_mm_takedown(&private->mm);
 777         iommu_domain_free(private->domain);
 778 }
 779
 780 #ifdef CONFIG_DEBUG_FS
 781 static int rockchip_drm_mm_dump(struct seq_file *s, void *data)
 782 {
 783         struct drm_info_node *node = s->private;
 784         struct drm_minor *minor = node->minor;
 785         struct drm_device *drm_dev = minor->dev;
 786         struct rockchip_drm_private *priv = drm_dev->dev_private;
 787         int ret;
 788
 789         mutex_lock(&priv->mm_lock);
 790
 791         ret = drm_mm_dump_table(s, &priv->mm);
 792
 793         mutex_unlock(&priv->mm_lock);
 794
 795         return ret;
 796 }
 797
 798 static int rockchip_drm_summary_show(struct seq_file *s, void *data)
 799 {
 800         struct drm_info_node *node = s->private;
 801         struct drm_minor *minor = node->minor;
 802         struct drm_device *drm_dev = minor->dev;
 803         struct rockchip_drm_private *priv = drm_dev->dev_private;
 804         struct drm_crtc *crtc;
 805
 806         drm_for_each_crtc(crtc, drm_dev) {
 807                 int pipe = drm_crtc_index(crtc);
 808
 809                 if (priv->crtc_funcs[pipe] &&
 810                     priv->crtc_funcs[pipe]->debugfs_dump)
 811                         priv->crtc_funcs[pipe]->debugfs_dump(crtc, s);
 812         }
 813
 814         return 0;
 815 }
 816
 817 static struct drm_info_list rockchip_debugfs_files[] = {
 818         { "summary", rockchip_drm_summary_show, 0, NULL },
 819         { "mm_dump", rockchip_drm_mm_dump, 0, NULL },
 820 };
 821
 822 static int rockchip_drm_debugfs_init(struct drm_minor *minor)
 823 {
 824         struct drm_device *dev = minor->dev;
 825         int ret;
 826
 827         ret = drm_debugfs_create_files(rockchip_debugfs_files,
 828                                        ARRAY_SIZE(rockchip_debugfs_files),
 829                                        minor->debugfs_root,
 830                                        minor);
 831         if (ret) {
 832                 dev_err(dev->dev, "could not install rockchip_debugfs_list\n");
 833                 return ret;
 834         }
 835
 836         return 0;
 837 }
 838
 839 static void rockchip_drm_debugfs_cleanup(struct drm_minor *minor)
 840 {
 841         drm_debugfs_remove_files(rockchip_debugfs_files,
 842                                  ARRAY_SIZE(rockchip_debugfs_files), minor);
 843 }
 844 #endif
 845
 846 static int rockchip_drm_bind(struct device *dev)
 847 {
 848         struct drm_device *drm_dev;
 849         struct rockchip_drm_private *private;
 850         int ret;
 851
 852         drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
 853         if (!drm_dev)
 854                 return -ENOMEM;
 855
 856         ret = drm_dev_set_unique(drm_dev, "%s", dev_name(dev));
 857         if (ret)
 858                 goto err_free;
 859
 860         dev_set_drvdata(dev, drm_dev);
 861
 862         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 863         if (!private) {
 864                 ret = -ENOMEM;
 865                 goto err_free;
 866         }
 867
 868         mutex_init(&private->commit.lock);
 869         INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
 870
 871         drm_dev->dev_private = private;
 872
 873 #ifdef CONFIG_DRM_DMA_SYNC
 874         private->cpu_fence_context = fence_context_alloc(1);
 875         atomic_set(&private->cpu_fence_seqno, 0);
 876 #endif
 877
 878         drm_mode_config_init(drm_dev);
 879
 880         rockchip_drm_mode_config_init(drm_dev);
 881
 882         ret = rockchip_drm_init_iommu(drm_dev);
 883         if (ret)
 884                 goto err_config_cleanup;
 885
 886         /* Try to bind all sub drivers. */
 887         ret = component_bind_all(dev, drm_dev);
 888         if (ret)
 889                 goto err_iommu_cleanup;
 890
 891         /* init kms poll for handling hpd */
 892         drm_kms_helper_poll_init(drm_dev);
 893
 894         /*
 895          * enable drm irq mode.
 896          * - with irq_enabled = true, we can use the vblank feature.
 897          */
 898         drm_dev->irq_enabled = true;
 899
 900         ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
 901         if (ret)
 902                 goto err_kms_helper_poll_fini;
 903
 904         /*
 905          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 906          * by drm timer once a current process gives up ownership of
 907          * vblank event.(after drm_vblank_put function is called)
 908          */
 909         drm_dev->vblank_disable_allowed = true;
 910
 911         drm_mode_config_reset(drm_dev);
 912
 913         show_loader_logo(drm_dev);
 914
 915         ret = rockchip_drm_fbdev_init(drm_dev);
 916         if (ret)
 917                 goto err_vblank_cleanup;
 918
 919         drm_dev->mode_config.allow_fb_modifiers = true;
 920
 921         ret = drm_dev_register(drm_dev, 0);
 922         if (ret)
 923                 goto err_fbdev_fini;
 924
 925         return 0;
 926 err_fbdev_fini:
 927         rockchip_drm_fbdev_fini(drm_dev);
 928 err_vblank_cleanup:
 929         drm_vblank_cleanup(drm_dev);
 930 err_kms_helper_poll_fini:
 931         drm_kms_helper_poll_fini(drm_dev);
 932         component_unbind_all(dev, drm_dev);
 933 err_iommu_cleanup:
 934         rockchip_iommu_cleanup(drm_dev);
 935 err_config_cleanup:
 936         drm_mode_config_cleanup(drm_dev);
 937         drm_dev->dev_private = NULL;
 938 err_free:
 939         drm_dev_unref(drm_dev);
 940         return ret;
 941 }
 942
 943 static void rockchip_drm_unbind(struct device *dev)
 944 {
 945         struct drm_device *drm_dev = dev_get_drvdata(dev);
 946
 947         rockchip_drm_fbdev_fini(drm_dev);
 948         drm_vblank_cleanup(drm_dev);
 949         drm_kms_helper_poll_fini(drm_dev);
 950         component_unbind_all(dev, drm_dev);
 951         rockchip_iommu_cleanup(drm_dev);
 952         drm_mode_config_cleanup(drm_dev);
 953         drm_dev->dev_private = NULL;
 954         drm_dev_unregister(drm_dev);
 955         drm_dev_unref(drm_dev);
 956         dev_set_drvdata(dev, NULL);
 957 }
 958
 959 static void rockchip_drm_crtc_cancel_pending_vblank(struct drm_crtc *crtc,
 960                                                     struct drm_file *file_priv)
 961 {
 962         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 963         int pipe = drm_crtc_index(crtc);
 964
 965         if (pipe < ROCKCHIP_MAX_CRTC &&
 966             priv->crtc_funcs[pipe] &&
 967             priv->crtc_funcs[pipe]->cancel_pending_vblank)
 968                 priv->crtc_funcs[pipe]->cancel_pending_vblank(crtc, file_priv);
 969 }
 970
 971 int rockchip_drm_register_subdrv(struct drm_rockchip_subdrv *subdrv)
 972 {
 973         if (!subdrv)
 974                 return -EINVAL;
 975
 976         mutex_lock(&subdrv_list_mutex);
 977         list_add_tail(&subdrv->list, &rockchip_drm_subdrv_list);
 978         mutex_unlock(&subdrv_list_mutex);
 979
 980         return 0;
 981 }
 982 EXPORT_SYMBOL_GPL(rockchip_drm_register_subdrv);
 983
 984 int rockchip_drm_unregister_subdrv(struct drm_rockchip_subdrv *subdrv)
 985 {
 986         if (!subdrv)
 987                 return -EINVAL;
 988
 989         mutex_lock(&subdrv_list_mutex);
 990         list_del(&subdrv->list);
 991         mutex_unlock(&subdrv_list_mutex);
 992
 993         return 0;
 994 }
 995 EXPORT_SYMBOL_GPL(rockchip_drm_unregister_subdrv);
 996
 997 static int rockchip_drm_open(struct drm_device *dev, struct drm_file *file)
 998 {
 999         struct rockchip_drm_file_private *file_priv;
1000         struct drm_rockchip_subdrv *subdrv;
1001         int ret = 0;
1002
1003         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
1004         if (!file_priv)
1005                 return -ENOMEM;
1006         INIT_LIST_HEAD(&file_priv->gem_cpu_acquire_list);
1007
1008         file->driver_priv = file_priv;
1009
1010         mutex_lock(&subdrv_list_mutex);
1011         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list) {
1012                 ret = subdrv->open(dev, subdrv->dev, file);
1013                 if (ret) {
1014                         mutex_unlock(&subdrv_list_mutex);
1015                         goto err_free_file_priv;
1016                 }
1017         }
1018         mutex_unlock(&subdrv_list_mutex);
1019
1020         return 0;
1021
1022 err_free_file_priv:
1023         kfree(file_priv);
1024         file_priv = NULL;
1025
1026         return ret;
1027 }
1028
1029 static void rockchip_drm_preclose(struct drm_device *dev,
1030                                   struct drm_file *file_priv)
1031 {
1032         struct rockchip_drm_file_private *file_private = file_priv->driver_priv;
1033         struct rockchip_gem_object_node *cur, *d;
1034         struct drm_rockchip_subdrv *subdrv;
1035         struct drm_crtc *crtc;
1036
1037         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
1038                 rockchip_drm_crtc_cancel_pending_vblank(crtc, file_priv);
1039
1040         mutex_lock(&dev->struct_mutex);
1041         list_for_each_entry_safe(cur, d,
1042                         &file_private->gem_cpu_acquire_list, list) {
1043 #ifdef CONFIG_DRM_DMA_SYNC
1044                 BUG_ON(!cur->rockchip_gem_obj->acquire_fence);
1045                 drm_fence_signal_and_put(&cur->rockchip_gem_obj->acquire_fence);
1046 #endif
1047                 drm_gem_object_unreference(&cur->rockchip_gem_obj->base);
1048                 kfree(cur);
1049         }
1050         /* since we are deleting the whole list, just initialize the header
1051          * instead of calling list_del for every element
1052          */
1053         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
1054         mutex_unlock(&dev->struct_mutex);
1055
1056         mutex_lock(&subdrv_list_mutex);
1057         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list)
1058                 subdrv->close(dev, subdrv->dev, file_priv);
1059         mutex_unlock(&subdrv_list_mutex);
1060 }
1061
1062 static void rockchip_drm_postclose(struct drm_device *dev, struct drm_file *file)
1063 {
1064         kfree(file->driver_priv);
1065         file->driver_priv = NULL;
1066 }
1067
1068 void rockchip_drm_lastclose(struct drm_device *dev)
1069 {
1070         struct rockchip_drm_private *priv = dev->dev_private;
1071
1072         drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev_helper);
1073 }
1074
1075 static const struct drm_ioctl_desc rockchip_ioctls[] = {
1076         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CREATE, rockchip_gem_create_ioctl,
1077                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1078         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_MAP_OFFSET,
1079                           rockchip_gem_map_offset_ioctl,
1080                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1081         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_ACQUIRE,
1082                           rockchip_gem_cpu_acquire_ioctl,
1083                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1084         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_RELEASE,
1085                           rockchip_gem_cpu_release_ioctl,
1086                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1087         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_GET_VER, rockchip_rga_get_ver_ioctl,
1088                           DRM_AUTH | DRM_RENDER_ALLOW),
1089         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_SET_CMDLIST,
1090                           rockchip_rga_set_cmdlist_ioctl,
1091                           DRM_AUTH | DRM_RENDER_ALLOW),
1092         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_EXEC, rockchip_rga_exec_ioctl,
1093                           DRM_AUTH | DRM_RENDER_ALLOW),
1094 };
1095
1096 static const struct file_operations rockchip_drm_driver_fops = {
1097         .owner = THIS_MODULE,
1098         .open = drm_open,
1099         .mmap = rockchip_gem_mmap,
1100         .poll = drm_poll,
1101         .read = drm_read,
1102         .unlocked_ioctl = drm_ioctl,
1103 #ifdef CONFIG_COMPAT
1104         .compat_ioctl = drm_compat_ioctl,
1105 #endif
1106         .release = drm_release,
1107 };
1108
1109 const struct vm_operations_struct rockchip_drm_vm_ops = {
1110         .open = drm_gem_vm_open,
1111         .close = drm_gem_vm_close,
1112 };
1113
1114 static struct drm_driver rockchip_drm_driver = {
1115         .driver_features        = DRIVER_MODESET | DRIVER_GEM |
1116                                   DRIVER_PRIME | DRIVER_ATOMIC |
1117                                   DRIVER_RENDER,
1118         .preclose               = rockchip_drm_preclose,
1119         .lastclose              = rockchip_drm_lastclose,
1120         .get_vblank_counter     = drm_vblank_no_hw_counter,
1121         .open                   = rockchip_drm_open,
1122         .postclose              = rockchip_drm_postclose,
1123         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
1124         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
1125         .gem_vm_ops             = &rockchip_drm_vm_ops,
1126         .gem_free_object        = rockchip_gem_free_object,
1127         .dumb_create            = rockchip_gem_dumb_create,
1128         .dumb_map_offset        = rockchip_gem_dumb_map_offset,
1129         .dumb_destroy           = drm_gem_dumb_destroy,
1130         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
1131         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
1132         .gem_prime_import       = drm_gem_prime_import,
1133         .gem_prime_export       = drm_gem_prime_export,
1134         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
1135         .gem_prime_import_sg_table      = rockchip_gem_prime_import_sg_table,
1136         .gem_prime_vmap         = rockchip_gem_prime_vmap,
1137         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
1138         .gem_prime_mmap         = rockchip_gem_mmap_buf,
1139 #ifdef CONFIG_DEBUG_FS
1140         .debugfs_init           = rockchip_drm_debugfs_init,
1141         .debugfs_cleanup        = rockchip_drm_debugfs_cleanup,
1142 #endif
1143         .ioctls                 = rockchip_ioctls,
1144         .num_ioctls             = ARRAY_SIZE(rockchip_ioctls),
1145         .fops                   = &rockchip_drm_driver_fops,
1146         .name   = DRIVER_NAME,
1147         .desc   = DRIVER_DESC,
1148         .date   = DRIVER_DATE,
1149         .major  = DRIVER_MAJOR,
1150         .minor  = DRIVER_MINOR,
1151 };
1152
1153 #ifdef CONFIG_PM_SLEEP
1154 void rockchip_drm_fb_suspend(struct drm_device *drm)
1155 {
1156         struct rockchip_drm_private *priv = drm->dev_private;
1157
1158         console_lock();
1159         drm_fb_helper_set_suspend(priv->fbdev_helper, 1);
1160         console_unlock();
1161 }
1162
1163 void rockchip_drm_fb_resume(struct drm_device *drm)
1164 {
1165         struct rockchip_drm_private *priv = drm->dev_private;
1166
1167         console_lock();
1168         drm_fb_helper_set_suspend(priv->fbdev_helper, 0);
1169         console_unlock();
1170 }
1171
1172 static int rockchip_drm_sys_suspend(struct device *dev)
1173 {
1174         struct drm_device *drm = dev_get_drvdata(dev);
1175         struct rockchip_drm_private *priv = drm->dev_private;
1176
1177         drm_kms_helper_poll_disable(drm);
1178         rockchip_drm_fb_suspend(drm);
1179
1180         priv->state = drm_atomic_helper_suspend(drm);
1181         if (IS_ERR(priv->state)) {
1182                 rockchip_drm_fb_resume(drm);
1183                 drm_kms_helper_poll_enable(drm);
1184                 return PTR_ERR(priv->state);
1185         }
1186
1187         return 0;
1188 }
1189
1190 static int rockchip_drm_sys_resume(struct device *dev)
1191 {
1192         struct drm_device *drm = dev_get_drvdata(dev);
1193         struct rockchip_drm_private *priv = drm->dev_private;
1194
1195         drm_atomic_helper_resume(drm, priv->state);
1196         rockchip_drm_fb_resume(drm);
1197         drm_kms_helper_poll_enable(drm);
1198
1199         return 0;
1200 }
1201 #endif
1202
1203 static const struct dev_pm_ops rockchip_drm_pm_ops = {
1204         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
1205                                 rockchip_drm_sys_resume)
1206 };
1207
1208 static int compare_of(struct device *dev, void *data)
1209 {
1210         struct device_node *np = data;
1211
1212         return dev->of_node == np;
1213 }
1214
1215 static void rockchip_add_endpoints(struct device *dev,
1216                                    struct component_match **match,
1217                                    struct device_node *port)
1218 {
1219         struct device_node *ep, *remote;
1220
1221         for_each_child_of_node(port, ep) {
1222                 remote = of_graph_get_remote_port_parent(ep);
1223                 if (!remote || !of_device_is_available(remote)) {
1224                         of_node_put(remote);
1225                         continue;
1226                 } else if (!of_device_is_available(remote->parent)) {
1227                         dev_warn(dev, "parent device of %s is not available\n",
1228                                  remote->full_name);
1229                         of_node_put(remote);
1230                         continue;
1231                 }
1232
1233                 component_match_add(dev, match, compare_of, remote);
1234                 of_node_put(remote);
1235         }
1236 }
1237
1238 static const struct component_master_ops rockchip_drm_ops = {
1239         .bind = rockchip_drm_bind,
1240         .unbind = rockchip_drm_unbind,
1241 };
1242
1243 static int rockchip_drm_platform_probe(struct platform_device *pdev)
1244 {
1245         struct device *dev = &pdev->dev;
1246         struct component_match *match = NULL;
1247         struct device_node *np = dev->of_node;
1248         struct device_node *port;
1249         int i;
1250
1251         if (!np)
1252                 return -ENODEV;
1253         /*
1254          * Bind the crtc ports first, so that
1255          * drm_of_find_possible_crtcs called from encoder .bind callbacks
1256          * works as expected.
1257          */
1258         for (i = 0;; i++) {
1259                 struct device_node *iommu;
1260
1261                 port = of_parse_phandle(np, "ports", i);
1262                 if (!port)
1263                         break;
1264
1265                 if (!of_device_is_available(port->parent)) {
1266                         of_node_put(port);
1267                         continue;
1268                 }
1269
1270                 iommu = of_parse_phandle(port->parent, "iommus", 0);
1271                 if (!iommu || !of_device_is_available(iommu->parent)) {
1272                         dev_dbg(dev, "no iommu attached for %s, using non-iommu buffers\n",
1273                                 port->parent->full_name);
1274                         /*
1275                          * if there is a crtc not support iommu, force set all
1276                          * crtc use non-iommu buffer.
1277                          */
1278                         is_support_iommu = false;
1279                 }
1280
1281                 component_match_add(dev, &match, compare_of, port->parent);
1282                 of_node_put(port);
1283         }
1284
1285         if (i == 0) {
1286                 dev_err(dev, "missing 'ports' property\n");
1287                 return -ENODEV;
1288         }
1289
1290         if (!match) {
1291                 dev_err(dev, "No available vop found for display-subsystem.\n");
1292                 return -ENODEV;
1293         }
1294         /*
1295          * For each bound crtc, bind the encoders attached to its
1296          * remote endpoint.
1297          */
1298         for (i = 0;; i++) {
1299                 port = of_parse_phandle(np, "ports", i);
1300                 if (!port)
1301                         break;
1302
1303                 if (!of_device_is_available(port->parent)) {
1304                         of_node_put(port);
1305                         continue;
1306                 }
1307
1308                 rockchip_add_endpoints(dev, &match, port);
1309                 of_node_put(port);
1310         }
1311
1312         return component_master_add_with_match(dev, &rockchip_drm_ops, match);
1313 }
1314
1315 static int rockchip_drm_platform_remove(struct platform_device *pdev)
1316 {
1317         component_master_del(&pdev->dev, &rockchip_drm_ops);
1318
1319         return 0;
1320 }
1321
1322 static const struct of_device_id rockchip_drm_dt_ids[] = {
1323         { .compatible = "rockchip,display-subsystem", },
1324         { /* sentinel */ },
1325 };
1326 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
1327
1328 static struct platform_driver rockchip_drm_platform_driver = {
1329         .probe = rockchip_drm_platform_probe,
1330         .remove = rockchip_drm_platform_remove,
1331         .driver = {
1332                 .name = "rockchip-drm",
1333                 .of_match_table = rockchip_drm_dt_ids,
1334                 .pm = &rockchip_drm_pm_ops,
1335         },
1336 };
1337
1338 module_platform_driver(rockchip_drm_platform_driver);
1339
1340 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
1341 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
1342 MODULE_LICENSE("GPL v2");