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                 int prot = IOMMU_READ | IOMMU_WRITE;
 153
 154                 memset(&logo->mm, 0, sizeof(logo->mm));
 155                 ret = drm_mm_insert_node_generic(&private->mm, &logo->mm,
 156                                                  size, PAGE_SIZE,
 157                                                  0, 0, 0);
 158                 if (ret < 0) {
 159                         DRM_ERROR("out of I/O virtual memory: %d\n", ret);
 160                         goto err_free_pages;
 161                 }
 162
 163                 logo->dma_addr = logo->mm.start;
 164
 165                 if (iommu_map_sg(private->domain, logo->dma_addr, sgt->sgl,
 166                                  sgt->nents, prot) < 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                 encoder_helper_funcs = encoder->helper_private;
 489                 if (!encoder || !encoder_helper_funcs->atomic_check)
 490                         return -ENXIO;
 491                 ret = encoder_helper_funcs->atomic_check(encoder, crtc->state,
 492                                                          conn_state);
 493                 if (ret)
 494                         return ret;
 495                 if (encoder_helper_funcs->mode_set)
 496                         encoder_helper_funcs->mode_set(encoder, mode, mode);
 497                 priv->crtc_funcs[pipe]->loader_protect(crtc, true);
 498         }
 499
 500         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 501         if (IS_ERR(primary_state))
 502                 return PTR_ERR(primary_state);
 503
 504         crtc_state->plane_mask = 1 << drm_plane_index(crtc->primary);
 505         *plane_mask |= crtc_state->plane_mask;
 506
 507         drm_atomic_set_fb_for_plane(primary_state, set->fb);
 508         drm_framebuffer_unreference(set->fb);
 509         ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
 510
 511         if (set->ymirror)
 512                 /*
 513                  * TODO:
 514                  * some vop maybe not support ymirror, but force use it now.
 515                  */
 516                 drm_atomic_plane_set_property(crtc->primary, primary_state,
 517                                               mode_config->rotation_property,
 518                                               BIT(DRM_REFLECT_Y));
 519
 520         return ret;
 521 }
 522
 523 static void show_loader_logo(struct drm_device *drm_dev)
 524 {
 525         struct drm_atomic_state *state;
 526         struct device_node *np = drm_dev->dev->of_node;
 527         struct drm_mode_config *mode_config = &drm_dev->mode_config;
 528         struct device_node *root, *route;
 529         struct rockchip_drm_mode_set *set, *tmp;
 530         struct list_head mode_set_list;
 531         unsigned plane_mask = 0;
 532         int ret;
 533
 534         root = of_get_child_by_name(np, "route");
 535         if (!root) {
 536                 dev_warn(drm_dev->dev, "failed to parse display resources\n");
 537                 return;
 538         }
 539
 540         if (init_loader_memory(drm_dev)) {
 541                 dev_warn(drm_dev->dev, "failed to parse loader memory\n");
 542                 return;
 543         }
 544
 545         INIT_LIST_HEAD(&mode_set_list);
 546         drm_modeset_lock_all(drm_dev);
 547         state = drm_atomic_state_alloc(drm_dev);
 548         if (!state) {
 549                 dev_err(drm_dev->dev, "failed to alloc atomic state\n");
 550                 ret = -ENOMEM;
 551                 goto err_unlock;
 552         }
 553
 554         state->acquire_ctx = mode_config->acquire_ctx;
 555
 556         for_each_child_of_node(root, route) {
 557                 if (!of_device_is_available(route))
 558                         continue;
 559
 560                 set = of_parse_display_resource(drm_dev, route);
 561                 if (!set)
 562                         continue;
 563
 564                 if (setup_initial_state(drm_dev, state, set)) {
 565                         drm_framebuffer_unreference(set->fb);
 566                         kfree(set);
 567                         continue;
 568                 }
 569                 INIT_LIST_HEAD(&set->head);
 570                 list_add_tail(&set->head, &mode_set_list);
 571         }
 572
 573         if (list_empty(&mode_set_list)) {
 574                 dev_warn(drm_dev->dev, "can't not find any loader display\n");
 575                 ret = -ENXIO;
 576                 goto err_free_state;
 577         }
 578
 579         /*
 580          * The state save initial devices status, swap the state into
 581          * drm deivces as old state, so if new state come, can compare
 582          * with this state to judge which status need to update.
 583          */
 584         drm_atomic_helper_swap_state(drm_dev, state);
 585         drm_atomic_state_free(state);
 586         state = drm_atomic_helper_duplicate_state(drm_dev,
 587                                                   mode_config->acquire_ctx);
 588         if (IS_ERR(state)) {
 589                 dev_err(drm_dev->dev, "failed to duplicate atomic state\n");
 590                 ret = PTR_ERR_OR_ZERO(state);
 591                 goto err_unlock;
 592         }
 593         state->acquire_ctx = mode_config->acquire_ctx;
 594         list_for_each_entry(set, &mode_set_list, head)
 595                 /*
 596                  * We don't want to see any fail on update_state.
 597                  */
 598                 WARN_ON(update_state(drm_dev, state, set, &plane_mask));
 599
 600         ret = drm_atomic_commit(state);
 601         drm_atomic_clean_old_fb(drm_dev, plane_mask, ret);
 602
 603         list_for_each_entry_safe(set, tmp, &mode_set_list, head) {
 604                 struct drm_crtc *crtc = set->crtc;
 605
 606                 list_del(&set->head);
 607                 kfree(set);
 608
 609                 /* FIXME:
 610                  * primary plane state rotation is not BIT(0), but we only want
 611                  * it effect on logo display, userspace may not known to clean
 612                  * this property, would get unexpect display, so force set
 613                  * primary rotation to BIT(0).
 614                  */
 615                 if (!crtc->primary || !crtc->primary->state)
 616                         continue;
 617
 618                 drm_atomic_plane_set_property(crtc->primary,
 619                                               crtc->primary->state,
 620                                               mode_config->rotation_property,
 621                                               BIT(0));
 622         }
 623
 624         /*
 625          * Is possible get deadlock here?
 626          */
 627         WARN_ON(ret == -EDEADLK);
 628
 629         if (ret)
 630                 goto err_free_state;
 631
 632         drm_modeset_unlock_all(drm_dev);
 633         return;
 634
 635 err_free_state:
 636         drm_atomic_state_free(state);
 637 err_unlock:
 638         drm_modeset_unlock_all(drm_dev);
 639         if (ret)
 640                 dev_err(drm_dev->dev, "failed to show loader logo\n");
 641 }
 642
 643 /*
 644  * Attach a (component) device to the shared drm dma mapping from master drm
 645  * device.  This is used by the VOPs to map GEM buffers to a common DMA
 646  * mapping.
 647  */
 648 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
 649                                    struct device *dev)
 650 {
 651         struct rockchip_drm_private *private = drm_dev->dev_private;
 652         int ret;
 653
 654         if (!is_support_iommu)
 655                 return 0;
 656
 657         ret = iommu_attach_device(private->domain, dev);
 658         if (ret) {
 659                 dev_err(dev, "Failed to attach iommu device\n");
 660                 return ret;
 661         }
 662
 663         return 0;
 664 }
 665
 666 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
 667                                     struct device *dev)
 668 {
 669         struct rockchip_drm_private *private = drm_dev->dev_private;
 670         struct iommu_domain *domain = private->domain;
 671
 672         if (!is_support_iommu)
 673                 return;
 674
 675         iommu_detach_device(domain, dev);
 676 }
 677
 678 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
 679                                  const struct rockchip_crtc_funcs *crtc_funcs)
 680 {
 681         int pipe = drm_crtc_index(crtc);
 682         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 683
 684         if (pipe > ROCKCHIP_MAX_CRTC)
 685                 return -EINVAL;
 686
 687         priv->crtc_funcs[pipe] = crtc_funcs;
 688
 689         return 0;
 690 }
 691
 692 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
 693 {
 694         int pipe = drm_crtc_index(crtc);
 695         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 696
 697         if (pipe > ROCKCHIP_MAX_CRTC)
 698                 return;
 699
 700         priv->crtc_funcs[pipe] = NULL;
 701 }
 702
 703 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
 704                                                 int pipe)
 705 {
 706         struct drm_crtc *crtc;
 707         int i = 0;
 708
 709         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 710                 if (i++ == pipe)
 711                         return crtc;
 712
 713         return NULL;
 714 }
 715
 716 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
 717                                            unsigned int pipe)
 718 {
 719         struct rockchip_drm_private *priv = dev->dev_private;
 720         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 721
 722         if (crtc && priv->crtc_funcs[pipe] &&
 723             priv->crtc_funcs[pipe]->enable_vblank)
 724                 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
 725
 726         return 0;
 727 }
 728
 729 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
 730                                              unsigned int pipe)
 731 {
 732         struct rockchip_drm_private *priv = dev->dev_private;
 733         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 734
 735         if (crtc && priv->crtc_funcs[pipe] &&
 736             priv->crtc_funcs[pipe]->enable_vblank)
 737                 priv->crtc_funcs[pipe]->disable_vblank(crtc);
 738 }
 739
 740 static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
 741 {
 742         struct rockchip_drm_private *private = drm_dev->dev_private;
 743         struct iommu_domain_geometry *geometry;
 744         u64 start, end;
 745
 746         if (!is_support_iommu)
 747                 return 0;
 748
 749         private->domain = iommu_domain_alloc(&platform_bus_type);
 750         if (!private->domain)
 751                 return -ENOMEM;
 752
 753         geometry = &private->domain->geometry;
 754         start = geometry->aperture_start;
 755         end = geometry->aperture_end;
 756
 757         DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
 758                   start, end);
 759         drm_mm_init(&private->mm, start, end - start + 1);
 760         mutex_init(&private->mm_lock);
 761
 762         return 0;
 763 }
 764
 765 static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
 766 {
 767         struct rockchip_drm_private *private = drm_dev->dev_private;
 768
 769         if (!is_support_iommu)
 770                 return;
 771
 772         drm_mm_takedown(&private->mm);
 773         iommu_domain_free(private->domain);
 774 }
 775
 776 #ifdef CONFIG_DEBUG_FS
 777 static int rockchip_drm_mm_dump(struct seq_file *s, void *data)
 778 {
 779         struct drm_info_node *node = s->private;
 780         struct drm_minor *minor = node->minor;
 781         struct drm_device *drm_dev = minor->dev;
 782         struct rockchip_drm_private *priv = drm_dev->dev_private;
 783         int ret;
 784
 785         mutex_lock(&priv->mm_lock);
 786
 787         ret = drm_mm_dump_table(s, &priv->mm);
 788
 789         mutex_unlock(&priv->mm_lock);
 790
 791         return ret;
 792 }
 793
 794 static int rockchip_drm_summary_show(struct seq_file *s, void *data)
 795 {
 796         struct drm_info_node *node = s->private;
 797         struct drm_minor *minor = node->minor;
 798         struct drm_device *drm_dev = minor->dev;
 799         struct rockchip_drm_private *priv = drm_dev->dev_private;
 800         struct drm_crtc *crtc;
 801
 802         drm_for_each_crtc(crtc, drm_dev) {
 803                 int pipe = drm_crtc_index(crtc);
 804
 805                 if (priv->crtc_funcs[pipe] &&
 806                     priv->crtc_funcs[pipe]->debugfs_dump)
 807                         priv->crtc_funcs[pipe]->debugfs_dump(crtc, s);
 808         }
 809
 810         return 0;
 811 }
 812
 813 static struct drm_info_list rockchip_debugfs_files[] = {
 814         { "summary", rockchip_drm_summary_show, 0, NULL },
 815         { "mm_dump", rockchip_drm_mm_dump, 0, NULL },
 816 };
 817
 818 static int rockchip_drm_debugfs_init(struct drm_minor *minor)
 819 {
 820         struct drm_device *dev = minor->dev;
 821         int ret;
 822
 823         ret = drm_debugfs_create_files(rockchip_debugfs_files,
 824                                        ARRAY_SIZE(rockchip_debugfs_files),
 825                                        minor->debugfs_root,
 826                                        minor);
 827         if (ret) {
 828                 dev_err(dev->dev, "could not install rockchip_debugfs_list\n");
 829                 return ret;
 830         }
 831
 832         return 0;
 833 }
 834
 835 static void rockchip_drm_debugfs_cleanup(struct drm_minor *minor)
 836 {
 837         drm_debugfs_remove_files(rockchip_debugfs_files,
 838                                  ARRAY_SIZE(rockchip_debugfs_files), minor);
 839 }
 840 #endif
 841
 842 static int rockchip_drm_bind(struct device *dev)
 843 {
 844         struct drm_device *drm_dev;
 845         struct rockchip_drm_private *private;
 846         int ret;
 847
 848         drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
 849         if (!drm_dev)
 850                 return -ENOMEM;
 851
 852         ret = drm_dev_set_unique(drm_dev, "%s", dev_name(dev));
 853         if (ret)
 854                 goto err_free;
 855
 856         dev_set_drvdata(dev, drm_dev);
 857
 858         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 859         if (!private) {
 860                 ret = -ENOMEM;
 861                 goto err_free;
 862         }
 863
 864         mutex_init(&private->commit.lock);
 865         INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
 866
 867         drm_dev->dev_private = private;
 868
 869 #ifdef CONFIG_DRM_DMA_SYNC
 870         private->cpu_fence_context = fence_context_alloc(1);
 871         atomic_set(&private->cpu_fence_seqno, 0);
 872 #endif
 873
 874         drm_mode_config_init(drm_dev);
 875
 876         rockchip_drm_mode_config_init(drm_dev);
 877
 878         ret = rockchip_drm_init_iommu(drm_dev);
 879         if (ret)
 880                 goto err_config_cleanup;
 881
 882         /* Try to bind all sub drivers. */
 883         ret = component_bind_all(dev, drm_dev);
 884         if (ret)
 885                 goto err_iommu_cleanup;
 886
 887         /* init kms poll for handling hpd */
 888         drm_kms_helper_poll_init(drm_dev);
 889
 890         /*
 891          * enable drm irq mode.
 892          * - with irq_enabled = true, we can use the vblank feature.
 893          */
 894         drm_dev->irq_enabled = true;
 895
 896         ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
 897         if (ret)
 898                 goto err_kms_helper_poll_fini;
 899
 900         /*
 901          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 902          * by drm timer once a current process gives up ownership of
 903          * vblank event.(after drm_vblank_put function is called)
 904          */
 905         drm_dev->vblank_disable_allowed = true;
 906
 907         drm_mode_config_reset(drm_dev);
 908
 909         show_loader_logo(drm_dev);
 910
 911         ret = rockchip_drm_fbdev_init(drm_dev);
 912         if (ret)
 913                 goto err_vblank_cleanup;
 914
 915         drm_dev->mode_config.allow_fb_modifiers = true;
 916
 917         ret = drm_dev_register(drm_dev, 0);
 918         if (ret)
 919                 goto err_fbdev_fini;
 920
 921         return 0;
 922 err_fbdev_fini:
 923         rockchip_drm_fbdev_fini(drm_dev);
 924 err_vblank_cleanup:
 925         drm_vblank_cleanup(drm_dev);
 926 err_kms_helper_poll_fini:
 927         drm_kms_helper_poll_fini(drm_dev);
 928         component_unbind_all(dev, drm_dev);
 929 err_iommu_cleanup:
 930         rockchip_iommu_cleanup(drm_dev);
 931 err_config_cleanup:
 932         drm_mode_config_cleanup(drm_dev);
 933         drm_dev->dev_private = NULL;
 934 err_free:
 935         drm_dev_unref(drm_dev);
 936         return ret;
 937 }
 938
 939 static void rockchip_drm_unbind(struct device *dev)
 940 {
 941         struct drm_device *drm_dev = dev_get_drvdata(dev);
 942
 943         rockchip_drm_fbdev_fini(drm_dev);
 944         drm_vblank_cleanup(drm_dev);
 945         drm_kms_helper_poll_fini(drm_dev);
 946         component_unbind_all(dev, drm_dev);
 947         rockchip_iommu_cleanup(drm_dev);
 948         drm_mode_config_cleanup(drm_dev);
 949         drm_dev->dev_private = NULL;
 950         drm_dev_unregister(drm_dev);
 951         drm_dev_unref(drm_dev);
 952         dev_set_drvdata(dev, NULL);
 953 }
 954
 955 static void rockchip_drm_crtc_cancel_pending_vblank(struct drm_crtc *crtc,
 956                                                     struct drm_file *file_priv)
 957 {
 958         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 959         int pipe = drm_crtc_index(crtc);
 960
 961         if (pipe < ROCKCHIP_MAX_CRTC &&
 962             priv->crtc_funcs[pipe] &&
 963             priv->crtc_funcs[pipe]->cancel_pending_vblank)
 964                 priv->crtc_funcs[pipe]->cancel_pending_vblank(crtc, file_priv);
 965 }
 966
 967 int rockchip_drm_register_subdrv(struct drm_rockchip_subdrv *subdrv)
 968 {
 969         if (!subdrv)
 970                 return -EINVAL;
 971
 972         mutex_lock(&subdrv_list_mutex);
 973         list_add_tail(&subdrv->list, &rockchip_drm_subdrv_list);
 974         mutex_unlock(&subdrv_list_mutex);
 975
 976         return 0;
 977 }
 978 EXPORT_SYMBOL_GPL(rockchip_drm_register_subdrv);
 979
 980 int rockchip_drm_unregister_subdrv(struct drm_rockchip_subdrv *subdrv)
 981 {
 982         if (!subdrv)
 983                 return -EINVAL;
 984
 985         mutex_lock(&subdrv_list_mutex);
 986         list_del(&subdrv->list);
 987         mutex_unlock(&subdrv_list_mutex);
 988
 989         return 0;
 990 }
 991 EXPORT_SYMBOL_GPL(rockchip_drm_unregister_subdrv);
 992
 993 static int rockchip_drm_open(struct drm_device *dev, struct drm_file *file)
 994 {
 995         struct rockchip_drm_file_private *file_priv;
 996         struct drm_rockchip_subdrv *subdrv;
 997         int ret = 0;
 998
 999         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
1000         if (!file_priv)
1001                 return -ENOMEM;
1002         INIT_LIST_HEAD(&file_priv->gem_cpu_acquire_list);
1003
1004         file->driver_priv = file_priv;
1005
1006         mutex_lock(&subdrv_list_mutex);
1007         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list) {
1008                 ret = subdrv->open(dev, subdrv->dev, file);
1009                 if (ret) {
1010                         mutex_unlock(&subdrv_list_mutex);
1011                         goto err_free_file_priv;
1012                 }
1013         }
1014         mutex_unlock(&subdrv_list_mutex);
1015
1016         return 0;
1017
1018 err_free_file_priv:
1019         kfree(file_priv);
1020         file_priv = NULL;
1021
1022         return ret;
1023 }
1024
1025 static void rockchip_drm_preclose(struct drm_device *dev,
1026                                   struct drm_file *file_priv)
1027 {
1028         struct rockchip_drm_file_private *file_private = file_priv->driver_priv;
1029         struct rockchip_gem_object_node *cur, *d;
1030         struct drm_rockchip_subdrv *subdrv;
1031         struct drm_crtc *crtc;
1032
1033         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
1034                 rockchip_drm_crtc_cancel_pending_vblank(crtc, file_priv);
1035
1036         mutex_lock(&dev->struct_mutex);
1037         list_for_each_entry_safe(cur, d,
1038                         &file_private->gem_cpu_acquire_list, list) {
1039 #ifdef CONFIG_DRM_DMA_SYNC
1040                 BUG_ON(!cur->rockchip_gem_obj->acquire_fence);
1041                 drm_fence_signal_and_put(&cur->rockchip_gem_obj->acquire_fence);
1042 #endif
1043                 drm_gem_object_unreference(&cur->rockchip_gem_obj->base);
1044                 kfree(cur);
1045         }
1046         /* since we are deleting the whole list, just initialize the header
1047          * instead of calling list_del for every element
1048          */
1049         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
1050         mutex_unlock(&dev->struct_mutex);
1051
1052         mutex_lock(&subdrv_list_mutex);
1053         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list)
1054                 subdrv->close(dev, subdrv->dev, file_priv);
1055         mutex_unlock(&subdrv_list_mutex);
1056 }
1057
1058 static void rockchip_drm_postclose(struct drm_device *dev, struct drm_file *file)
1059 {
1060         kfree(file->driver_priv);
1061         file->driver_priv = NULL;
1062 }
1063
1064 void rockchip_drm_lastclose(struct drm_device *dev)
1065 {
1066         struct rockchip_drm_private *priv = dev->dev_private;
1067
1068         drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev_helper);
1069 }
1070
1071 static const struct drm_ioctl_desc rockchip_ioctls[] = {
1072         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CREATE, rockchip_gem_create_ioctl,
1073                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1074         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_MAP_OFFSET,
1075                           rockchip_gem_map_offset_ioctl,
1076                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1077         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_ACQUIRE,
1078                           rockchip_gem_cpu_acquire_ioctl,
1079                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1080         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_RELEASE,
1081                           rockchip_gem_cpu_release_ioctl,
1082                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1083         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_GET_VER, rockchip_rga_get_ver_ioctl,
1084                           DRM_AUTH | DRM_RENDER_ALLOW),
1085         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_SET_CMDLIST,
1086                           rockchip_rga_set_cmdlist_ioctl,
1087                           DRM_AUTH | DRM_RENDER_ALLOW),
1088         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_EXEC, rockchip_rga_exec_ioctl,
1089                           DRM_AUTH | DRM_RENDER_ALLOW),
1090 };
1091
1092 static const struct file_operations rockchip_drm_driver_fops = {
1093         .owner = THIS_MODULE,
1094         .open = drm_open,
1095         .mmap = rockchip_gem_mmap,
1096         .poll = drm_poll,
1097         .read = drm_read,
1098         .unlocked_ioctl = drm_ioctl,
1099 #ifdef CONFIG_COMPAT
1100         .compat_ioctl = drm_compat_ioctl,
1101 #endif
1102         .release = drm_release,
1103 };
1104
1105 const struct vm_operations_struct rockchip_drm_vm_ops = {
1106         .open = drm_gem_vm_open,
1107         .close = drm_gem_vm_close,
1108 };
1109
1110 static struct drm_driver rockchip_drm_driver = {
1111         .driver_features        = DRIVER_MODESET | DRIVER_GEM |
1112                                   DRIVER_PRIME | DRIVER_ATOMIC |
1113                                   DRIVER_RENDER,
1114         .preclose               = rockchip_drm_preclose,
1115         .lastclose              = rockchip_drm_lastclose,
1116         .get_vblank_counter     = drm_vblank_no_hw_counter,
1117         .open                   = rockchip_drm_open,
1118         .postclose              = rockchip_drm_postclose,
1119         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
1120         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
1121         .gem_vm_ops             = &rockchip_drm_vm_ops,
1122         .gem_free_object        = rockchip_gem_free_object,
1123         .dumb_create            = rockchip_gem_dumb_create,
1124         .dumb_map_offset        = rockchip_gem_dumb_map_offset,
1125         .dumb_destroy           = drm_gem_dumb_destroy,
1126         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
1127         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
1128         .gem_prime_import       = drm_gem_prime_import,
1129         .gem_prime_export       = drm_gem_prime_export,
1130         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
1131         .gem_prime_import_sg_table      = rockchip_gem_prime_import_sg_table,
1132         .gem_prime_vmap         = rockchip_gem_prime_vmap,
1133         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
1134         .gem_prime_mmap         = rockchip_gem_mmap_buf,
1135 #ifdef CONFIG_DEBUG_FS
1136         .debugfs_init           = rockchip_drm_debugfs_init,
1137         .debugfs_cleanup        = rockchip_drm_debugfs_cleanup,
1138 #endif
1139         .ioctls                 = rockchip_ioctls,
1140         .num_ioctls             = ARRAY_SIZE(rockchip_ioctls),
1141         .fops                   = &rockchip_drm_driver_fops,
1142         .name   = DRIVER_NAME,
1143         .desc   = DRIVER_DESC,
1144         .date   = DRIVER_DATE,
1145         .major  = DRIVER_MAJOR,
1146         .minor  = DRIVER_MINOR,
1147 };
1148
1149 #ifdef CONFIG_PM_SLEEP
1150 void rockchip_drm_fb_suspend(struct drm_device *drm)
1151 {
1152         struct rockchip_drm_private *priv = drm->dev_private;
1153
1154         console_lock();
1155         drm_fb_helper_set_suspend(priv->fbdev_helper, 1);
1156         console_unlock();
1157 }
1158
1159 void rockchip_drm_fb_resume(struct drm_device *drm)
1160 {
1161         struct rockchip_drm_private *priv = drm->dev_private;
1162
1163         console_lock();
1164         drm_fb_helper_set_suspend(priv->fbdev_helper, 0);
1165         console_unlock();
1166 }
1167
1168 static int rockchip_drm_sys_suspend(struct device *dev)
1169 {
1170         struct drm_device *drm = dev_get_drvdata(dev);
1171         struct rockchip_drm_private *priv = drm->dev_private;
1172
1173         drm_kms_helper_poll_disable(drm);
1174         rockchip_drm_fb_suspend(drm);
1175
1176         priv->state = drm_atomic_helper_suspend(drm);
1177         if (IS_ERR(priv->state)) {
1178                 rockchip_drm_fb_resume(drm);
1179                 drm_kms_helper_poll_enable(drm);
1180                 return PTR_ERR(priv->state);
1181         }
1182
1183         return 0;
1184 }
1185
1186 static int rockchip_drm_sys_resume(struct device *dev)
1187 {
1188         struct drm_device *drm = dev_get_drvdata(dev);
1189         struct rockchip_drm_private *priv = drm->dev_private;
1190
1191         drm_atomic_helper_resume(drm, priv->state);
1192         rockchip_drm_fb_resume(drm);
1193         drm_kms_helper_poll_enable(drm);
1194
1195         return 0;
1196 }
1197 #endif
1198
1199 static const struct dev_pm_ops rockchip_drm_pm_ops = {
1200         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
1201                                 rockchip_drm_sys_resume)
1202 };
1203
1204 static int compare_of(struct device *dev, void *data)
1205 {
1206         struct device_node *np = data;
1207
1208         return dev->of_node == np;
1209 }
1210
1211 static void rockchip_add_endpoints(struct device *dev,
1212                                    struct component_match **match,
1213                                    struct device_node *port)
1214 {
1215         struct device_node *ep, *remote;
1216
1217         for_each_child_of_node(port, ep) {
1218                 remote = of_graph_get_remote_port_parent(ep);
1219                 if (!remote || !of_device_is_available(remote)) {
1220                         of_node_put(remote);
1221                         continue;
1222                 } else if (!of_device_is_available(remote->parent)) {
1223                         dev_warn(dev, "parent device of %s is not available\n",
1224                                  remote->full_name);
1225                         of_node_put(remote);
1226                         continue;
1227                 }
1228
1229                 component_match_add(dev, match, compare_of, remote);
1230                 of_node_put(remote);
1231         }
1232 }
1233
1234 static const struct component_master_ops rockchip_drm_ops = {
1235         .bind = rockchip_drm_bind,
1236         .unbind = rockchip_drm_unbind,
1237 };
1238
1239 static int rockchip_drm_platform_probe(struct platform_device *pdev)
1240 {
1241         struct device *dev = &pdev->dev;
1242         struct component_match *match = NULL;
1243         struct device_node *np = dev->of_node;
1244         struct device_node *port;
1245         int i;
1246
1247         if (!np)
1248                 return -ENODEV;
1249         /*
1250          * Bind the crtc ports first, so that
1251          * drm_of_find_possible_crtcs called from encoder .bind callbacks
1252          * works as expected.
1253          */
1254         for (i = 0;; i++) {
1255                 struct device_node *iommu;
1256
1257                 port = of_parse_phandle(np, "ports", i);
1258                 if (!port)
1259                         break;
1260
1261                 if (!of_device_is_available(port->parent)) {
1262                         of_node_put(port);
1263                         continue;
1264                 }
1265
1266                 iommu = of_parse_phandle(port->parent, "iommus", 0);
1267                 if (!iommu || !of_device_is_available(iommu->parent)) {
1268                         dev_dbg(dev, "no iommu attached for %s, using non-iommu buffers\n",
1269                                 port->parent->full_name);
1270                         /*
1271                          * if there is a crtc not support iommu, force set all
1272                          * crtc use non-iommu buffer.
1273                          */
1274                         is_support_iommu = false;
1275                 }
1276
1277                 component_match_add(dev, &match, compare_of, port->parent);
1278                 of_node_put(port);
1279         }
1280
1281         if (i == 0) {
1282                 dev_err(dev, "missing 'ports' property\n");
1283                 return -ENODEV;
1284         }
1285
1286         if (!match) {
1287                 dev_err(dev, "No available vop found for display-subsystem.\n");
1288                 return -ENODEV;
1289         }
1290         /*
1291          * For each bound crtc, bind the encoders attached to its
1292          * remote endpoint.
1293          */
1294         for (i = 0;; i++) {
1295                 port = of_parse_phandle(np, "ports", i);
1296                 if (!port)
1297                         break;
1298
1299                 if (!of_device_is_available(port->parent)) {
1300                         of_node_put(port);
1301                         continue;
1302                 }
1303
1304                 rockchip_add_endpoints(dev, &match, port);
1305                 of_node_put(port);
1306         }
1307
1308         return component_master_add_with_match(dev, &rockchip_drm_ops, match);
1309 }
1310
1311 static int rockchip_drm_platform_remove(struct platform_device *pdev)
1312 {
1313         component_master_del(&pdev->dev, &rockchip_drm_ops);
1314
1315         return 0;
1316 }
1317
1318 static const struct of_device_id rockchip_drm_dt_ids[] = {
1319         { .compatible = "rockchip,display-subsystem", },
1320         { /* sentinel */ },
1321 };
1322 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
1323
1324 static struct platform_driver rockchip_drm_platform_driver = {
1325         .probe = rockchip_drm_platform_probe,
1326         .remove = rockchip_drm_platform_remove,
1327         .driver = {
1328                 .name = "rockchip-drm",
1329                 .of_match_table = rockchip_drm_dt_ids,
1330                 .pm = &rockchip_drm_pm_ops,
1331         },
1332 };
1333
1334 module_platform_driver(rockchip_drm_platform_driver);
1335
1336 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
1337 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
1338 MODULE_LICENSE("GPL v2");