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/clk.h>
  31 #include <linux/clk-provider.h>
  32 #include <linux/component.h>
  33 #include <linux/fence.h>
  34 #include <linux/console.h>
  35 #include <linux/iommu.h>
  36
  37 #include <drm/rockchip_drm.h>
  38
  39 #include "rockchip_drm_drv.h"
  40 #include "rockchip_drm_fb.h"
  41 #include "rockchip_drm_fbdev.h"
  42 #include "rockchip_drm_gem.h"
  43 #include "rockchip_drm_rga.h"
  44
  45 #define DRIVER_NAME     "rockchip"
  46 #define DRIVER_DESC     "RockChip Soc DRM"
  47 #define DRIVER_DATE     "20140818"
  48 #define DRIVER_MAJOR    1
  49 #define DRIVER_MINOR    0
  50
  51 static bool is_support_iommu = true;
  52
  53 static LIST_HEAD(rockchip_drm_subdrv_list);
  54 static DEFINE_MUTEX(subdrv_list_mutex);
  55 static struct drm_driver rockchip_drm_driver;
  56
  57 struct rockchip_drm_mode_set {
  58         struct list_head head;
  59         struct drm_framebuffer *fb;
  60         struct drm_connector *connector;
  61         struct drm_crtc *crtc;
  62         struct drm_display_mode *mode;
  63         int hdisplay;
  64         int vdisplay;
  65         int vrefresh;
  66
  67         bool mode_changed;
  68         bool ymirror;
  69         int ratio;
  70 };
  71
  72 #ifndef MODULE
  73 static struct drm_crtc *find_crtc_by_node(struct drm_device *drm_dev,
  74                                           struct device_node *node)
  75 {
  76         struct device_node *np_crtc;
  77         struct drm_crtc *crtc;
  78
  79         np_crtc = of_get_parent(node);
  80         if (!np_crtc || !of_device_is_available(np_crtc))
  81                 return NULL;
  82
  83         drm_for_each_crtc(crtc, drm_dev) {
  84                 if (crtc->port == np_crtc)
  85                         return crtc;
  86         }
  87
  88         return NULL;
  89 }
  90
  91 static struct drm_connector *find_connector_by_node(struct drm_device *drm_dev,
  92                                                     struct device_node *node)
  93 {
  94         struct device_node *np_connector;
  95         struct drm_connector *connector;
  96
  97         np_connector = of_graph_get_remote_port_parent(node);
  98         if (!np_connector || !of_device_is_available(np_connector))
  99                 return NULL;
 100
 101         drm_for_each_connector(connector, drm_dev) {
 102                 if (connector->port == np_connector)
 103                         return connector;
 104         }
 105
 106         return NULL;
 107 }
 108
 109 void rockchip_free_loader_memory(struct drm_device *drm)
 110 {
 111         struct rockchip_drm_private *private = drm->dev_private;
 112         struct rockchip_logo *logo;
 113         void *start, *end;
 114
 115         if (!private || !private->logo || --private->logo->count)
 116                 return;
 117
 118         logo = private->logo;
 119         start = phys_to_virt(logo->start);
 120         end = phys_to_virt(logo->start + logo->size);
 121
 122         if (private->domain) {
 123                 iommu_unmap(private->domain, logo->dma_addr,
 124                             logo->iommu_map_size);
 125                 drm_mm_remove_node(&logo->mm);
 126         } else {
 127                 dma_unmap_sg(drm->dev, logo->sgt->sgl,
 128                              logo->sgt->nents, DMA_TO_DEVICE);
 129         }
 130         sg_free_table(logo->sgt);
 131         memblock_free(logo->start, logo->size);
 132         free_reserved_area(start, end, -1, "drm_logo");
 133         kfree(logo);
 134         private->logo = NULL;
 135 }
 136
 137 static int init_loader_memory(struct drm_device *drm_dev)
 138 {
 139         struct rockchip_drm_private *private = drm_dev->dev_private;
 140         struct rockchip_logo *logo;
 141         struct device_node *np = drm_dev->dev->of_node;
 142         struct device_node *node;
 143         unsigned long nr_pages;
 144         struct page **pages;
 145         struct sg_table *sgt;
 146         phys_addr_t start, size;
 147         struct resource res;
 148         int i, ret;
 149
 150         node = of_parse_phandle(np, "memory-region", 0);
 151         if (!node)
 152                 return -ENOMEM;
 153
 154         ret = of_address_to_resource(node, 0, &res);
 155         if (ret)
 156                 return ret;
 157         start = res.start;
 158         size = resource_size(&res);
 159         if (!size)
 160                 return -ENOMEM;
 161
 162         logo = kmalloc(sizeof(*logo), GFP_KERNEL);
 163         if (!logo)
 164                 return -ENOMEM;
 165
 166         nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
 167         pages = kmalloc_array(nr_pages, sizeof(*pages), GFP_KERNEL);
 168         if (!pages)
 169                 goto err_free_logo;
 170         i = 0;
 171         while (i < nr_pages) {
 172                 pages[i] = phys_to_page(start);
 173                 start += PAGE_SIZE;
 174                 i++;
 175         }
 176         sgt = drm_prime_pages_to_sg(pages, nr_pages);
 177         if (IS_ERR(sgt)) {
 178                 ret = PTR_ERR(sgt);
 179                 goto err_free_pages;
 180         }
 181
 182         if (private->domain) {
 183                 memset(&logo->mm, 0, sizeof(logo->mm));
 184                 ret = drm_mm_insert_node_generic(&private->mm, &logo->mm,
 185                                                  size, PAGE_SIZE,
 186                                                  0, 0, 0);
 187                 if (ret < 0) {
 188                         DRM_ERROR("out of I/O virtual memory: %d\n", ret);
 189                         goto err_free_pages;
 190                 }
 191
 192                 logo->dma_addr = logo->mm.start;
 193
 194                 logo->iommu_map_size = iommu_map_sg(private->domain,
 195                                                     logo->dma_addr, sgt->sgl,
 196                                                     sgt->nents, IOMMU_READ);
 197                 if (logo->iommu_map_size < size) {
 198                         DRM_ERROR("failed to map buffer");
 199                         ret = -ENOMEM;
 200                         goto err_remove_node;
 201                 }
 202         } else {
 203                 dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, DMA_TO_DEVICE);
 204                 logo->dma_addr = sg_dma_address(sgt->sgl);
 205         }
 206
 207         logo->sgt = sgt;
 208         logo->start = res.start;
 209         logo->size = size;
 210         logo->count = 1;
 211         private->logo = logo;
 212
 213         return 0;
 214
 215 err_remove_node:
 216         drm_mm_remove_node(&logo->mm);
 217 err_free_pages:
 218         kfree(pages);
 219 err_free_logo:
 220         kfree(logo);
 221
 222         return ret;
 223 }
 224
 225 static struct drm_framebuffer *
 226 get_framebuffer_by_node(struct drm_device *drm_dev, struct device_node *node)
 227 {
 228         struct rockchip_drm_private *private = drm_dev->dev_private;
 229         struct drm_mode_fb_cmd2 mode_cmd = { 0 };
 230         u32 val;
 231         int bpp;
 232
 233         if (WARN_ON(!private->logo))
 234                 return NULL;
 235
 236         if (of_property_read_u32(node, "logo,offset", &val)) {
 237                 pr_err("%s: failed to get logo,offset\n", __func__);
 238                 return NULL;
 239         }
 240         mode_cmd.offsets[0] = val;
 241
 242         if (of_property_read_u32(node, "logo,width", &val)) {
 243                 pr_err("%s: failed to get logo,width\n", __func__);
 244                 return NULL;
 245         }
 246         mode_cmd.width = val;
 247
 248         if (of_property_read_u32(node, "logo,height", &val)) {
 249                 pr_err("%s: failed to get logo,height\n", __func__);
 250                 return NULL;
 251         }
 252         mode_cmd.height = val;
 253
 254         if (of_property_read_u32(node, "logo,bpp", &val)) {
 255                 pr_err("%s: failed to get logo,bpp\n", __func__);
 256                 return NULL;
 257         }
 258         bpp = val;
 259
 260         mode_cmd.pitches[0] = ALIGN(mode_cmd.width * bpp, 32) / 8;
 261
 262         switch (bpp) {
 263         case 16:
 264                 mode_cmd.pixel_format = DRM_FORMAT_BGR565;
 265                 break;
 266         case 24:
 267                 mode_cmd.pixel_format = DRM_FORMAT_BGR888;
 268                 break;
 269         case 32:
 270                 mode_cmd.pixel_format = DRM_FORMAT_XRGB8888;
 271                 break;
 272         default:
 273                 pr_err("%s: unsupport to logo bpp %d\n", __func__, bpp);
 274                 return NULL;
 275         }
 276
 277         return rockchip_fb_alloc(drm_dev, &mode_cmd, NULL, private->logo, 1);
 278 }
 279
 280 static struct rockchip_drm_mode_set *
 281 of_parse_display_resource(struct drm_device *drm_dev, struct device_node *route)
 282 {
 283         struct rockchip_drm_mode_set *set;
 284         struct device_node *connect;
 285         struct drm_framebuffer *fb;
 286         struct drm_connector *connector;
 287         struct drm_crtc *crtc;
 288         const char *string;
 289         u32 val;
 290
 291         connect = of_parse_phandle(route, "connect", 0);
 292         if (!connect)
 293                 return NULL;
 294
 295         fb = get_framebuffer_by_node(drm_dev, route);
 296         if (IS_ERR_OR_NULL(fb))
 297                 return NULL;
 298
 299         crtc = find_crtc_by_node(drm_dev, connect);
 300         connector = find_connector_by_node(drm_dev, connect);
 301         if (!crtc || !connector) {
 302                 dev_warn(drm_dev->dev,
 303                          "No available crtc or connector for display");
 304                 drm_framebuffer_unreference(fb);
 305                 return NULL;
 306         }
 307
 308         set = kzalloc(sizeof(*set), GFP_KERNEL);
 309         if (!set)
 310                 return NULL;
 311
 312         if (!of_property_read_u32(route, "video,hdisplay", &val))
 313                 set->hdisplay = val;
 314
 315         if (!of_property_read_u32(route, "video,vdisplay", &val))
 316                 set->vdisplay = val;
 317
 318         if (!of_property_read_u32(route, "video,vrefresh", &val))
 319                 set->vrefresh = val;
 320
 321         if (!of_property_read_u32(route, "logo,ymirror", &val))
 322                 set->ymirror = val;
 323
 324         set->ratio = 1;
 325         if (!of_property_read_string(route, "logo,mode", &string) &&
 326             !strcmp(string, "fullscreen"))
 327                         set->ratio = 0;
 328
 329         set->fb = fb;
 330         set->crtc = crtc;
 331         set->connector = connector;
 332
 333         return set;
 334 }
 335
 336 int setup_initial_state(struct drm_device *drm_dev,
 337                         struct drm_atomic_state *state,
 338                         struct rockchip_drm_mode_set *set)
 339 {
 340         struct drm_connector *connector = set->connector;
 341         struct drm_crtc *crtc = set->crtc;
 342         struct drm_crtc_state *crtc_state;
 343         struct drm_connector_state *conn_state;
 344         struct drm_plane_state *primary_state;
 345         struct drm_display_mode *mode = NULL;
 346         const struct drm_connector_helper_funcs *funcs;
 347         bool is_crtc_enabled = true;
 348         int hdisplay, vdisplay;
 349         int fb_width, fb_height;
 350         int found = 0, match = 0;
 351         int num_modes;
 352         int ret = 0;
 353
 354         if (!set->hdisplay || !set->vdisplay || !set->vrefresh)
 355                 is_crtc_enabled = false;
 356
 357         conn_state = drm_atomic_get_connector_state(state, connector);
 358         if (IS_ERR(conn_state))
 359                 return PTR_ERR(conn_state);
 360
 361         funcs = connector->helper_private;
 362         conn_state->best_encoder = funcs->best_encoder(connector);
 363         if (funcs->loader_protect)
 364                 funcs->loader_protect(connector, true);
 365         connector->loader_protect = true;
 366         num_modes = connector->funcs->fill_modes(connector, 4096, 4096);
 367         if (!num_modes) {
 368                 dev_err(drm_dev->dev, "connector[%s] can't found any modes\n",
 369                         connector->name);
 370                 ret = -EINVAL;
 371                 goto error;
 372         }
 373
 374         list_for_each_entry(mode, &connector->modes, head) {
 375                 if (mode->hdisplay == set->hdisplay &&
 376                     mode->vdisplay == set->vdisplay &&
 377                     drm_mode_vrefresh(mode) == set->vrefresh) {
 378                         found = 1;
 379                         match = 1;
 380                         break;
 381                 }
 382         }
 383
 384         if (!found) {
 385                 list_for_each_entry(mode, &connector->modes, head) {
 386                         if (mode->type & DRM_MODE_TYPE_PREFERRED) {
 387                                 found = 1;
 388                                 break;
 389                         }
 390                 }
 391
 392                 if (!found) {
 393                         mode = list_first_entry_or_null(&connector->modes,
 394                                                         struct drm_display_mode,
 395                                                         head);
 396                         if (!mode) {
 397                                 pr_err("failed to find available modes\n");
 398                                 ret = -EINVAL;
 399                                 goto error;
 400                         }
 401                 }
 402         }
 403
 404         set->mode = mode;
 405         crtc_state = drm_atomic_get_crtc_state(state, crtc);
 406         if (IS_ERR(crtc_state)) {
 407                 ret = PTR_ERR(crtc_state);
 408                 goto error;
 409         }
 410
 411         drm_mode_copy(&crtc_state->adjusted_mode, mode);
 412         if (!match || !is_crtc_enabled) {
 413                 set->mode_changed = true;
 414         } else {
 415                 ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
 416                 if (ret)
 417                         goto error;
 418
 419                 ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
 420                 if (ret)
 421                         goto error;
 422
 423                 crtc_state->active = true;
 424         }
 425
 426         if (!set->fb) {
 427                 ret = 0;
 428                 goto error;
 429         }
 430         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 431         if (IS_ERR(primary_state)) {
 432                 ret = PTR_ERR(primary_state);
 433                 goto error;
 434         }
 435
 436         hdisplay = mode->hdisplay;
 437         vdisplay = mode->vdisplay;
 438         fb_width = set->fb->width;
 439         fb_height = set->fb->height;
 440
 441         primary_state->crtc = crtc;
 442         primary_state->src_x = 0;
 443         primary_state->src_y = 0;
 444         primary_state->src_w = fb_width << 16;
 445         primary_state->src_h = fb_height << 16;
 446         if (set->ratio) {
 447                 if (set->fb->width >= hdisplay) {
 448                         primary_state->crtc_x = 0;
 449                         primary_state->crtc_w = hdisplay;
 450                 } else {
 451                         primary_state->crtc_x = (hdisplay - fb_width) / 2;
 452                         primary_state->crtc_w = set->fb->width;
 453                 }
 454
 455                 if (set->fb->height >= vdisplay) {
 456                         primary_state->crtc_y = 0;
 457                         primary_state->crtc_h = vdisplay;
 458                 } else {
 459                         primary_state->crtc_y = (vdisplay - fb_height) / 2;
 460                         primary_state->crtc_h = fb_height;
 461                 }
 462         } else {
 463                 primary_state->crtc_x = 0;
 464                 primary_state->crtc_y = 0;
 465                 primary_state->crtc_w = hdisplay;
 466                 primary_state->crtc_h = vdisplay;
 467         }
 468
 469         return 0;
 470
 471 error:
 472         if (funcs->loader_protect)
 473                 funcs->loader_protect(connector, false);
 474         connector->loader_protect = false;
 475         return ret;
 476 }
 477
 478 static int update_state(struct drm_device *drm_dev,
 479                         struct drm_atomic_state *state,
 480                         struct rockchip_drm_mode_set *set,
 481                         unsigned int *plane_mask)
 482 {
 483         struct rockchip_drm_private *priv = drm_dev->dev_private;
 484         struct drm_crtc *crtc = set->crtc;
 485         struct drm_connector *connector = set->connector;
 486         struct drm_display_mode *mode = set->mode;
 487         struct drm_plane_state *primary_state;
 488         struct drm_crtc_state *crtc_state;
 489         struct drm_connector_state *conn_state;
 490         int ret;
 491
 492         crtc_state = drm_atomic_get_crtc_state(state, crtc);
 493         if (IS_ERR(crtc_state))
 494                 return PTR_ERR(crtc_state);
 495         conn_state = drm_atomic_get_connector_state(state, connector);
 496         if (IS_ERR(conn_state))
 497                 return PTR_ERR(conn_state);
 498
 499         if (set->mode_changed) {
 500                 ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
 501                 if (ret)
 502                         return ret;
 503
 504                 ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
 505                 if (ret)
 506                         return ret;
 507
 508                 crtc_state->active = true;
 509         } else {
 510                 const struct drm_encoder_helper_funcs *encoder_helper_funcs;
 511                 const struct drm_connector_helper_funcs *connector_helper_funcs;
 512                 struct drm_encoder *encoder;
 513                 int pipe = drm_crtc_index(crtc);
 514
 515                 connector_helper_funcs = connector->helper_private;
 516                 if (!priv->crtc_funcs[pipe] ||
 517                     !priv->crtc_funcs[pipe]->loader_protect ||
 518                     !connector_helper_funcs ||
 519                     !connector_helper_funcs->best_encoder)
 520                         return -ENXIO;
 521                 encoder = connector_helper_funcs->best_encoder(connector);
 522                 if (!encoder)
 523                         return -ENXIO;
 524                 encoder_helper_funcs = encoder->helper_private;
 525                 if (!encoder_helper_funcs->atomic_check)
 526                         return -ENXIO;
 527                 ret = encoder_helper_funcs->atomic_check(encoder, crtc->state,
 528                                                          conn_state);
 529                 if (ret)
 530                         return ret;
 531                 if (encoder_helper_funcs->mode_set)
 532                         encoder_helper_funcs->mode_set(encoder, mode, mode);
 533                 priv->crtc_funcs[pipe]->loader_protect(crtc, true);
 534         }
 535
 536         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 537         if (IS_ERR(primary_state))
 538                 return PTR_ERR(primary_state);
 539
 540         crtc_state->plane_mask = 1 << drm_plane_index(crtc->primary);
 541         *plane_mask |= crtc_state->plane_mask;
 542
 543         drm_atomic_set_fb_for_plane(primary_state, set->fb);
 544         drm_framebuffer_unreference(set->fb);
 545         ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
 546
 547         if (set->ymirror)
 548                 /*
 549                  * TODO:
 550                  * some vop maybe not support ymirror, but force use it now.
 551                  */
 552                 drm_atomic_plane_set_property(crtc->primary, primary_state,
 553                                               priv->logo_ymirror_prop,
 554                                               true);
 555
 556         return ret;
 557 }
 558
 559 static void show_loader_logo(struct drm_device *drm_dev)
 560 {
 561         struct drm_atomic_state *state, *old_state;
 562         struct device_node *np = drm_dev->dev->of_node;
 563         struct drm_mode_config *mode_config = &drm_dev->mode_config;
 564         struct device_node *root, *route;
 565         struct rockchip_drm_mode_set *set, *tmp;
 566         struct list_head mode_set_list;
 567         unsigned plane_mask = 0;
 568         int ret;
 569
 570         root = of_get_child_by_name(np, "route");
 571         if (!root) {
 572                 dev_warn(drm_dev->dev, "failed to parse display resources\n");
 573                 return;
 574         }
 575
 576         if (init_loader_memory(drm_dev)) {
 577                 dev_warn(drm_dev->dev, "failed to parse loader memory\n");
 578                 return;
 579         }
 580
 581         INIT_LIST_HEAD(&mode_set_list);
 582         drm_modeset_lock_all(drm_dev);
 583         state = drm_atomic_state_alloc(drm_dev);
 584         if (!state) {
 585                 dev_err(drm_dev->dev, "failed to alloc atomic state\n");
 586                 ret = -ENOMEM;
 587                 goto err_unlock;
 588         }
 589
 590         state->acquire_ctx = mode_config->acquire_ctx;
 591
 592         for_each_child_of_node(root, route) {
 593                 if (!of_device_is_available(route))
 594                         continue;
 595
 596                 set = of_parse_display_resource(drm_dev, route);
 597                 if (!set)
 598                         continue;
 599
 600                 if (setup_initial_state(drm_dev, state, set)) {
 601                         drm_framebuffer_unreference(set->fb);
 602                         kfree(set);
 603                         continue;
 604                 }
 605                 INIT_LIST_HEAD(&set->head);
 606                 list_add_tail(&set->head, &mode_set_list);
 607         }
 608
 609         if (list_empty(&mode_set_list)) {
 610                 dev_warn(drm_dev->dev, "can't not find any loader display\n");
 611                 ret = -ENXIO;
 612                 goto err_free_state;
 613         }
 614
 615         old_state = drm_atomic_helper_duplicate_state(drm_dev,
 616                                                       mode_config->acquire_ctx);
 617         if (IS_ERR(old_state)) {
 618                 dev_err(drm_dev->dev, "failed to duplicate atomic state\n");
 619                 ret = PTR_ERR_OR_ZERO(old_state);
 620                 goto err_free_state;
 621         }
 622
 623         /*
 624          * The state save initial devices status, swap the state into
 625          * drm deivces as old state, so if new state come, can compare
 626          * with this state to judge which status need to update.
 627          */
 628         drm_atomic_helper_swap_state(drm_dev, state);
 629         drm_atomic_state_free(state);
 630         state = drm_atomic_helper_duplicate_state(drm_dev,
 631                                                   mode_config->acquire_ctx);
 632         if (IS_ERR(state)) {
 633                 dev_err(drm_dev->dev, "failed to duplicate atomic state\n");
 634                 ret = PTR_ERR_OR_ZERO(state);
 635                 goto err_free_old_state;
 636         }
 637         state->acquire_ctx = mode_config->acquire_ctx;
 638         list_for_each_entry(set, &mode_set_list, head)
 639                 /*
 640                  * We don't want to see any fail on update_state.
 641                  */
 642                 WARN_ON(update_state(drm_dev, state, set, &plane_mask));
 643
 644         ret = drm_atomic_commit(state);
 645         drm_atomic_clean_old_fb(drm_dev, plane_mask, ret);
 646
 647         list_for_each_entry_safe(set, tmp, &mode_set_list, head) {
 648                 list_del(&set->head);
 649                 kfree(set);
 650         }
 651
 652         /*
 653          * Is possible get deadlock here?
 654          */
 655         WARN_ON(ret == -EDEADLK);
 656
 657         if (ret) {
 658                 /*
 659                  * restore display status if atomic commit failed.
 660                  */
 661                 drm_atomic_helper_swap_state(drm_dev, old_state);
 662                 goto err_free_old_state;
 663         }
 664
 665         rockchip_free_loader_memory(drm_dev);
 666         drm_atomic_state_free(old_state);
 667
 668         drm_modeset_unlock_all(drm_dev);
 669         return;
 670
 671 err_free_old_state:
 672         drm_atomic_state_free(old_state);
 673 err_free_state:
 674         drm_atomic_state_free(state);
 675 err_unlock:
 676         drm_modeset_unlock_all(drm_dev);
 677         if (ret)
 678                 dev_err(drm_dev->dev, "failed to show loader logo\n");
 679 }
 680
 681 static const char *const loader_protect_clocks[] __initconst = {
 682         "hclk_vio",
 683         "aclk_vio",
 684         "aclk_vio0",
 685 };
 686
 687 static struct clk **loader_clocks __initdata;
 688 static int __init rockchip_clocks_loader_protect(void)
 689 {
 690         int nclocks = ARRAY_SIZE(loader_protect_clocks);
 691         struct clk *clk;
 692         int i;
 693
 694         loader_clocks = kcalloc(nclocks, sizeof(void *), GFP_KERNEL);
 695         if (!loader_clocks)
 696                 return -ENOMEM;
 697
 698         for (i = 0; i < nclocks; i++) {
 699                 clk = __clk_lookup(loader_protect_clocks[i]);
 700
 701                 if (clk) {
 702                         loader_clocks[i] = clk;
 703                         clk_prepare_enable(clk);
 704                 }
 705         }
 706
 707         return 0;
 708 }
 709 fs_initcall(rockchip_clocks_loader_protect);
 710
 711 static int __init rockchip_clocks_loader_unprotect(void)
 712 {
 713         int i;
 714
 715         if (!loader_clocks)
 716                 return -ENODEV;
 717
 718         for (i = 0; i < ARRAY_SIZE(loader_protect_clocks); i++) {
 719                 struct clk *clk = loader_clocks[i];
 720
 721                 if (clk)
 722                         clk_disable_unprepare(clk);
 723         }
 724         kfree(loader_clocks);
 725
 726         return 0;
 727 }
 728 late_initcall_sync(rockchip_clocks_loader_unprotect);
 729 #endif
 730
 731 /*
 732  * Attach a (component) device to the shared drm dma mapping from master drm
 733  * device.  This is used by the VOPs to map GEM buffers to a common DMA
 734  * mapping.
 735  */
 736 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
 737                                    struct device *dev)
 738 {
 739         struct rockchip_drm_private *private = drm_dev->dev_private;
 740         int ret;
 741
 742         if (!is_support_iommu)
 743                 return 0;
 744
 745         ret = iommu_attach_device(private->domain, dev);
 746         if (ret) {
 747                 dev_err(dev, "Failed to attach iommu device\n");
 748                 return ret;
 749         }
 750
 751         return 0;
 752 }
 753
 754 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
 755                                     struct device *dev)
 756 {
 757         struct rockchip_drm_private *private = drm_dev->dev_private;
 758         struct iommu_domain *domain = private->domain;
 759
 760         if (!is_support_iommu)
 761                 return;
 762
 763         iommu_detach_device(domain, dev);
 764 }
 765
 766 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
 767                                  const struct rockchip_crtc_funcs *crtc_funcs)
 768 {
 769         int pipe = drm_crtc_index(crtc);
 770         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 771
 772         if (pipe >= ROCKCHIP_MAX_CRTC)
 773                 return -EINVAL;
 774
 775         priv->crtc_funcs[pipe] = crtc_funcs;
 776
 777         return 0;
 778 }
 779
 780 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
 781 {
 782         int pipe = drm_crtc_index(crtc);
 783         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 784
 785         if (pipe >= ROCKCHIP_MAX_CRTC)
 786                 return;
 787
 788         priv->crtc_funcs[pipe] = NULL;
 789 }
 790
 791 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
 792                                                 int pipe)
 793 {
 794         struct drm_crtc *crtc;
 795         int i = 0;
 796
 797         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 798                 if (i++ == pipe)
 799                         return crtc;
 800
 801         return NULL;
 802 }
 803
 804 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
 805                                            unsigned int pipe)
 806 {
 807         struct rockchip_drm_private *priv = dev->dev_private;
 808         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 809
 810         if (crtc && priv->crtc_funcs[pipe] &&
 811             priv->crtc_funcs[pipe]->enable_vblank)
 812                 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
 813
 814         return 0;
 815 }
 816
 817 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
 818                                              unsigned int pipe)
 819 {
 820         struct rockchip_drm_private *priv = dev->dev_private;
 821         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 822
 823         if (crtc && priv->crtc_funcs[pipe] &&
 824             priv->crtc_funcs[pipe]->enable_vblank)
 825                 priv->crtc_funcs[pipe]->disable_vblank(crtc);
 826 }
 827
 828 static int rockchip_drm_fault_handler(struct iommu_domain *iommu,
 829                                       struct device *dev,
 830                                       unsigned long iova, int flags, void *arg)
 831 {
 832         struct drm_device *drm_dev = arg;
 833         struct rockchip_drm_private *priv = drm_dev->dev_private;
 834         struct drm_crtc *crtc;
 835
 836         drm_for_each_crtc(crtc, drm_dev) {
 837                 int pipe = drm_crtc_index(crtc);
 838
 839                 if (priv->crtc_funcs[pipe] &&
 840                     priv->crtc_funcs[pipe]->regs_dump)
 841                         priv->crtc_funcs[pipe]->regs_dump(crtc, NULL);
 842
 843                 if (priv->crtc_funcs[pipe] &&
 844                     priv->crtc_funcs[pipe]->debugfs_dump)
 845                         priv->crtc_funcs[pipe]->debugfs_dump(crtc, NULL);
 846         }
 847
 848         return 0;
 849 }
 850
 851 static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
 852 {
 853         struct rockchip_drm_private *private = drm_dev->dev_private;
 854         struct iommu_domain_geometry *geometry;
 855         u64 start, end;
 856
 857         if (!is_support_iommu)
 858                 return 0;
 859
 860         private->domain = iommu_domain_alloc(&platform_bus_type);
 861         if (!private->domain)
 862                 return -ENOMEM;
 863
 864         geometry = &private->domain->geometry;
 865         start = geometry->aperture_start;
 866         end = geometry->aperture_end;
 867
 868         DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
 869                   start, end);
 870         drm_mm_init(&private->mm, start, end - start + 1);
 871         mutex_init(&private->mm_lock);
 872
 873         iommu_set_fault_handler(private->domain, rockchip_drm_fault_handler,
 874                                 drm_dev);
 875
 876         return 0;
 877 }
 878
 879 static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
 880 {
 881         struct rockchip_drm_private *private = drm_dev->dev_private;
 882
 883         if (!is_support_iommu)
 884                 return;
 885
 886         drm_mm_takedown(&private->mm);
 887         iommu_domain_free(private->domain);
 888 }
 889
 890 #ifdef CONFIG_DEBUG_FS
 891 static int rockchip_drm_mm_dump(struct seq_file *s, void *data)
 892 {
 893         struct drm_info_node *node = s->private;
 894         struct drm_minor *minor = node->minor;
 895         struct drm_device *drm_dev = minor->dev;
 896         struct rockchip_drm_private *priv = drm_dev->dev_private;
 897         int ret;
 898
 899         mutex_lock(&priv->mm_lock);
 900
 901         ret = drm_mm_dump_table(s, &priv->mm);
 902
 903         mutex_unlock(&priv->mm_lock);
 904
 905         return ret;
 906 }
 907
 908 static int rockchip_drm_summary_show(struct seq_file *s, void *data)
 909 {
 910         struct drm_info_node *node = s->private;
 911         struct drm_minor *minor = node->minor;
 912         struct drm_device *drm_dev = minor->dev;
 913         struct rockchip_drm_private *priv = drm_dev->dev_private;
 914         struct drm_crtc *crtc;
 915
 916         drm_for_each_crtc(crtc, drm_dev) {
 917                 int pipe = drm_crtc_index(crtc);
 918
 919                 if (priv->crtc_funcs[pipe] &&
 920                     priv->crtc_funcs[pipe]->debugfs_dump)
 921                         priv->crtc_funcs[pipe]->debugfs_dump(crtc, s);
 922         }
 923
 924         return 0;
 925 }
 926
 927 static struct drm_info_list rockchip_debugfs_files[] = {
 928         { "summary", rockchip_drm_summary_show, 0, NULL },
 929         { "mm_dump", rockchip_drm_mm_dump, 0, NULL },
 930 };
 931
 932 static int rockchip_drm_debugfs_init(struct drm_minor *minor)
 933 {
 934         struct drm_device *dev = minor->dev;
 935         int ret;
 936
 937         ret = drm_debugfs_create_files(rockchip_debugfs_files,
 938                                        ARRAY_SIZE(rockchip_debugfs_files),
 939                                        minor->debugfs_root,
 940                                        minor);
 941         if (ret) {
 942                 dev_err(dev->dev, "could not install rockchip_debugfs_list\n");
 943                 return ret;
 944         }
 945
 946         return 0;
 947 }
 948
 949 static void rockchip_drm_debugfs_cleanup(struct drm_minor *minor)
 950 {
 951         drm_debugfs_remove_files(rockchip_debugfs_files,
 952                                  ARRAY_SIZE(rockchip_debugfs_files), minor);
 953 }
 954 #endif
 955
 956 static int rockchip_drm_bind(struct device *dev)
 957 {
 958         struct drm_device *drm_dev;
 959         struct rockchip_drm_private *private;
 960         int ret;
 961
 962         drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
 963         if (!drm_dev)
 964                 return -ENOMEM;
 965
 966         ret = drm_dev_set_unique(drm_dev, "%s", dev_name(dev));
 967         if (ret)
 968                 goto err_free;
 969
 970         dev_set_drvdata(dev, drm_dev);
 971
 972         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 973         if (!private) {
 974                 ret = -ENOMEM;
 975                 goto err_free;
 976         }
 977
 978         mutex_init(&private->commit.lock);
 979         INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
 980
 981         drm_dev->dev_private = private;
 982
 983         private->hdmi_pll.pll = devm_clk_get(dev, "hdmi-tmds-pll");
 984         if (PTR_ERR(private->hdmi_pll.pll) == -ENOENT) {
 985                 private->hdmi_pll.pll = NULL;
 986         } else if (PTR_ERR(private->hdmi_pll.pll) == -EPROBE_DEFER) {
 987                 ret = -EPROBE_DEFER;
 988                 goto err_free;
 989         } else if (IS_ERR(private->hdmi_pll.pll)) {
 990                 dev_err(dev, "failed to get hdmi-tmds-pll\n");
 991                 ret = PTR_ERR(private->hdmi_pll.pll);
 992                 goto err_free;
 993         }
 994
 995         private->default_pll.pll = devm_clk_get(dev, "default-vop-pll");
 996         if (PTR_ERR(private->default_pll.pll) == -ENOENT) {
 997                 private->default_pll.pll = NULL;
 998         } else if (PTR_ERR(private->default_pll.pll) == -EPROBE_DEFER) {
 999                 ret = -EPROBE_DEFER;
1000                 goto err_free;
1001         } else if (IS_ERR(private->default_pll.pll)) {
1002                 dev_err(dev, "failed to get default vop pll\n");
1003                 ret = PTR_ERR(private->default_pll.pll);
1004                 goto err_free;
1005         }
1006
1007 #ifdef CONFIG_DRM_DMA_SYNC
1008         private->cpu_fence_context = fence_context_alloc(1);
1009         atomic_set(&private->cpu_fence_seqno, 0);
1010 #endif
1011
1012         drm_mode_config_init(drm_dev);
1013
1014         rockchip_drm_mode_config_init(drm_dev);
1015
1016         ret = rockchip_drm_init_iommu(drm_dev);
1017         if (ret)
1018                 goto err_config_cleanup;
1019
1020         /* Try to bind all sub drivers. */
1021         ret = component_bind_all(dev, drm_dev);
1022         if (ret)
1023                 goto err_iommu_cleanup;
1024
1025         /* init kms poll for handling hpd */
1026         drm_kms_helper_poll_init(drm_dev);
1027
1028         /*
1029          * enable drm irq mode.
1030          * - with irq_enabled = true, we can use the vblank feature.
1031          */
1032         drm_dev->irq_enabled = true;
1033
1034         ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
1035         if (ret)
1036                 goto err_kms_helper_poll_fini;
1037
1038         /*
1039          * with vblank_disable_allowed = true, vblank interrupt will be disabled
1040          * by drm timer once a current process gives up ownership of
1041          * vblank event.(after drm_vblank_put function is called)
1042          */
1043         drm_dev->vblank_disable_allowed = true;
1044
1045         drm_mode_config_reset(drm_dev);
1046
1047 #ifndef MODULE
1048         show_loader_logo(drm_dev);
1049 #endif
1050
1051         ret = rockchip_drm_fbdev_init(drm_dev);
1052         if (ret)
1053                 goto err_vblank_cleanup;
1054
1055         drm_dev->mode_config.allow_fb_modifiers = true;
1056
1057         ret = drm_dev_register(drm_dev, 0);
1058         if (ret)
1059                 goto err_fbdev_fini;
1060
1061         return 0;
1062 err_fbdev_fini:
1063         rockchip_drm_fbdev_fini(drm_dev);
1064 err_vblank_cleanup:
1065         drm_vblank_cleanup(drm_dev);
1066 err_kms_helper_poll_fini:
1067         drm_kms_helper_poll_fini(drm_dev);
1068         component_unbind_all(dev, drm_dev);
1069 err_iommu_cleanup:
1070         rockchip_iommu_cleanup(drm_dev);
1071 err_config_cleanup:
1072         drm_mode_config_cleanup(drm_dev);
1073         drm_dev->dev_private = NULL;
1074 err_free:
1075         drm_dev_unref(drm_dev);
1076         return ret;
1077 }
1078
1079 static void rockchip_drm_unbind(struct device *dev)
1080 {
1081         struct drm_device *drm_dev = dev_get_drvdata(dev);
1082
1083         rockchip_drm_fbdev_fini(drm_dev);
1084         drm_vblank_cleanup(drm_dev);
1085         drm_kms_helper_poll_fini(drm_dev);
1086         component_unbind_all(dev, drm_dev);
1087         rockchip_iommu_cleanup(drm_dev);
1088         drm_mode_config_cleanup(drm_dev);
1089         drm_dev->dev_private = NULL;
1090         drm_dev_unregister(drm_dev);
1091         drm_dev_unref(drm_dev);
1092         dev_set_drvdata(dev, NULL);
1093 }
1094
1095 static void rockchip_drm_crtc_cancel_pending_vblank(struct drm_crtc *crtc,
1096                                                     struct drm_file *file_priv)
1097 {
1098         struct rockchip_drm_private *priv = crtc->dev->dev_private;
1099         int pipe = drm_crtc_index(crtc);
1100
1101         if (pipe < ROCKCHIP_MAX_CRTC &&
1102             priv->crtc_funcs[pipe] &&
1103             priv->crtc_funcs[pipe]->cancel_pending_vblank)
1104                 priv->crtc_funcs[pipe]->cancel_pending_vblank(crtc, file_priv);
1105 }
1106
1107 int rockchip_drm_register_subdrv(struct drm_rockchip_subdrv *subdrv)
1108 {
1109         if (!subdrv)
1110                 return -EINVAL;
1111
1112         mutex_lock(&subdrv_list_mutex);
1113         list_add_tail(&subdrv->list, &rockchip_drm_subdrv_list);
1114         mutex_unlock(&subdrv_list_mutex);
1115
1116         return 0;
1117 }
1118 EXPORT_SYMBOL_GPL(rockchip_drm_register_subdrv);
1119
1120 int rockchip_drm_unregister_subdrv(struct drm_rockchip_subdrv *subdrv)
1121 {
1122         if (!subdrv)
1123                 return -EINVAL;
1124
1125         mutex_lock(&subdrv_list_mutex);
1126         list_del(&subdrv->list);
1127         mutex_unlock(&subdrv_list_mutex);
1128
1129         return 0;
1130 }
1131 EXPORT_SYMBOL_GPL(rockchip_drm_unregister_subdrv);
1132
1133 static int rockchip_drm_open(struct drm_device *dev, struct drm_file *file)
1134 {
1135         struct rockchip_drm_file_private *file_priv;
1136         struct drm_rockchip_subdrv *subdrv;
1137         int ret = 0;
1138
1139         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
1140         if (!file_priv)
1141                 return -ENOMEM;
1142         INIT_LIST_HEAD(&file_priv->gem_cpu_acquire_list);
1143
1144         file->driver_priv = file_priv;
1145
1146         mutex_lock(&subdrv_list_mutex);
1147         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list) {
1148                 ret = subdrv->open(dev, subdrv->dev, file);
1149                 if (ret) {
1150                         mutex_unlock(&subdrv_list_mutex);
1151                         goto err_free_file_priv;
1152                 }
1153         }
1154         mutex_unlock(&subdrv_list_mutex);
1155
1156         return 0;
1157
1158 err_free_file_priv:
1159         kfree(file_priv);
1160         file_priv = NULL;
1161
1162         return ret;
1163 }
1164
1165 static void rockchip_drm_preclose(struct drm_device *dev,
1166                                   struct drm_file *file_priv)
1167 {
1168         struct rockchip_drm_file_private *file_private = file_priv->driver_priv;
1169         struct rockchip_gem_object_node *cur, *d;
1170         struct drm_rockchip_subdrv *subdrv;
1171         struct drm_crtc *crtc;
1172
1173         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
1174                 rockchip_drm_crtc_cancel_pending_vblank(crtc, file_priv);
1175
1176         mutex_lock(&dev->struct_mutex);
1177         list_for_each_entry_safe(cur, d,
1178                         &file_private->gem_cpu_acquire_list, list) {
1179 #ifdef CONFIG_DRM_DMA_SYNC
1180                 BUG_ON(!cur->rockchip_gem_obj->acquire_fence);
1181                 drm_fence_signal_and_put(&cur->rockchip_gem_obj->acquire_fence);
1182 #endif
1183                 drm_gem_object_unreference(&cur->rockchip_gem_obj->base);
1184                 kfree(cur);
1185         }
1186         /* since we are deleting the whole list, just initialize the header
1187          * instead of calling list_del for every element
1188          */
1189         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
1190         mutex_unlock(&dev->struct_mutex);
1191
1192         mutex_lock(&subdrv_list_mutex);
1193         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list)
1194                 subdrv->close(dev, subdrv->dev, file_priv);
1195         mutex_unlock(&subdrv_list_mutex);
1196 }
1197
1198 static void rockchip_drm_postclose(struct drm_device *dev, struct drm_file *file)
1199 {
1200         kfree(file->driver_priv);
1201         file->driver_priv = NULL;
1202 }
1203
1204 void rockchip_drm_lastclose(struct drm_device *dev)
1205 {
1206         struct rockchip_drm_private *priv = dev->dev_private;
1207
1208         if (!priv->logo)
1209                 drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev_helper);
1210 }
1211
1212 static const struct drm_ioctl_desc rockchip_ioctls[] = {
1213         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CREATE, rockchip_gem_create_ioctl,
1214                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1215         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_MAP_OFFSET,
1216                           rockchip_gem_map_offset_ioctl,
1217                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1218         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_ACQUIRE,
1219                           rockchip_gem_cpu_acquire_ioctl,
1220                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1221         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_RELEASE,
1222                           rockchip_gem_cpu_release_ioctl,
1223                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
1224         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_GET_VER, rockchip_rga_get_ver_ioctl,
1225                           DRM_AUTH | DRM_RENDER_ALLOW),
1226         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_SET_CMDLIST,
1227                           rockchip_rga_set_cmdlist_ioctl,
1228                           DRM_AUTH | DRM_RENDER_ALLOW),
1229         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_EXEC, rockchip_rga_exec_ioctl,
1230                           DRM_AUTH | DRM_RENDER_ALLOW),
1231 };
1232
1233 static const struct file_operations rockchip_drm_driver_fops = {
1234         .owner = THIS_MODULE,
1235         .open = drm_open,
1236         .mmap = rockchip_gem_mmap,
1237         .poll = drm_poll,
1238         .read = drm_read,
1239         .unlocked_ioctl = drm_ioctl,
1240 #ifdef CONFIG_COMPAT
1241         .compat_ioctl = drm_compat_ioctl,
1242 #endif
1243         .release = drm_release,
1244 };
1245
1246 const struct vm_operations_struct rockchip_drm_vm_ops = {
1247         .open = drm_gem_vm_open,
1248         .close = drm_gem_vm_close,
1249 };
1250
1251 static struct drm_driver rockchip_drm_driver = {
1252         .driver_features        = DRIVER_MODESET | DRIVER_GEM |
1253                                   DRIVER_PRIME | DRIVER_ATOMIC |
1254                                   DRIVER_RENDER,
1255         .preclose               = rockchip_drm_preclose,
1256         .lastclose              = rockchip_drm_lastclose,
1257         .get_vblank_counter     = drm_vblank_no_hw_counter,
1258         .open                   = rockchip_drm_open,
1259         .postclose              = rockchip_drm_postclose,
1260         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
1261         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
1262         .gem_vm_ops             = &rockchip_drm_vm_ops,
1263         .gem_free_object        = rockchip_gem_free_object,
1264         .dumb_create            = rockchip_gem_dumb_create,
1265         .dumb_map_offset        = rockchip_gem_dumb_map_offset,
1266         .dumb_destroy           = drm_gem_dumb_destroy,
1267         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
1268         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
1269         .gem_prime_import       = drm_gem_prime_import,
1270         .gem_prime_export       = drm_gem_prime_export,
1271         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
1272         .gem_prime_import_sg_table      = rockchip_gem_prime_import_sg_table,
1273         .gem_prime_vmap         = rockchip_gem_prime_vmap,
1274         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
1275         .gem_prime_mmap         = rockchip_gem_mmap_buf,
1276 #ifdef CONFIG_DEBUG_FS
1277         .debugfs_init           = rockchip_drm_debugfs_init,
1278         .debugfs_cleanup        = rockchip_drm_debugfs_cleanup,
1279 #endif
1280         .ioctls                 = rockchip_ioctls,
1281         .num_ioctls             = ARRAY_SIZE(rockchip_ioctls),
1282         .fops                   = &rockchip_drm_driver_fops,
1283         .name   = DRIVER_NAME,
1284         .desc   = DRIVER_DESC,
1285         .date   = DRIVER_DATE,
1286         .major  = DRIVER_MAJOR,
1287         .minor  = DRIVER_MINOR,
1288 };
1289
1290 #ifdef CONFIG_PM_SLEEP
1291 void rockchip_drm_fb_suspend(struct drm_device *drm)
1292 {
1293         struct rockchip_drm_private *priv = drm->dev_private;
1294
1295         console_lock();
1296         drm_fb_helper_set_suspend(priv->fbdev_helper, 1);
1297         console_unlock();
1298 }
1299
1300 void rockchip_drm_fb_resume(struct drm_device *drm)
1301 {
1302         struct rockchip_drm_private *priv = drm->dev_private;
1303
1304         console_lock();
1305         drm_fb_helper_set_suspend(priv->fbdev_helper, 0);
1306         console_unlock();
1307 }
1308
1309 static int rockchip_drm_sys_suspend(struct device *dev)
1310 {
1311         struct drm_device *drm = dev_get_drvdata(dev);
1312         struct rockchip_drm_private *priv = drm->dev_private;
1313
1314         drm_kms_helper_poll_disable(drm);
1315         rockchip_drm_fb_suspend(drm);
1316
1317         priv->state = drm_atomic_helper_suspend(drm);
1318         if (IS_ERR(priv->state)) {
1319                 rockchip_drm_fb_resume(drm);
1320                 drm_kms_helper_poll_enable(drm);
1321                 return PTR_ERR(priv->state);
1322         }
1323
1324         return 0;
1325 }
1326
1327 static int rockchip_drm_sys_resume(struct device *dev)
1328 {
1329         struct drm_device *drm = dev_get_drvdata(dev);
1330         struct rockchip_drm_private *priv = drm->dev_private;
1331
1332         drm_atomic_helper_resume(drm, priv->state);
1333         rockchip_drm_fb_resume(drm);
1334         drm_kms_helper_poll_enable(drm);
1335
1336         return 0;
1337 }
1338 #endif
1339
1340 static const struct dev_pm_ops rockchip_drm_pm_ops = {
1341         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
1342                                 rockchip_drm_sys_resume)
1343 };
1344
1345 static int compare_of(struct device *dev, void *data)
1346 {
1347         struct device_node *np = data;
1348
1349         return dev->of_node == np;
1350 }
1351
1352 static void rockchip_add_endpoints(struct device *dev,
1353                                    struct component_match **match,
1354                                    struct device_node *port)
1355 {
1356         struct device_node *ep, *remote;
1357
1358         for_each_child_of_node(port, ep) {
1359                 remote = of_graph_get_remote_port_parent(ep);
1360                 if (!remote || !of_device_is_available(remote)) {
1361                         of_node_put(remote);
1362                         continue;
1363                 } else if (!of_device_is_available(remote->parent)) {
1364                         dev_warn(dev, "parent device of %s is not available\n",
1365                                  remote->full_name);
1366                         of_node_put(remote);
1367                         continue;
1368                 }
1369
1370                 component_match_add(dev, match, compare_of, remote);
1371                 of_node_put(remote);
1372         }
1373 }
1374
1375 static const struct component_master_ops rockchip_drm_ops = {
1376         .bind = rockchip_drm_bind,
1377         .unbind = rockchip_drm_unbind,
1378 };
1379
1380 static int rockchip_drm_platform_probe(struct platform_device *pdev)
1381 {
1382         struct device *dev = &pdev->dev;
1383         struct component_match *match = NULL;
1384         struct device_node *np = dev->of_node;
1385         struct device_node *port;
1386         int i;
1387
1388         if (!np)
1389                 return -ENODEV;
1390         /*
1391          * Bind the crtc ports first, so that
1392          * drm_of_find_possible_crtcs called from encoder .bind callbacks
1393          * works as expected.
1394          */
1395         for (i = 0;; i++) {
1396                 struct device_node *iommu;
1397
1398                 port = of_parse_phandle(np, "ports", i);
1399                 if (!port)
1400                         break;
1401
1402                 if (!of_device_is_available(port->parent)) {
1403                         of_node_put(port);
1404                         continue;
1405                 }
1406
1407                 iommu = of_parse_phandle(port->parent, "iommus", 0);
1408                 if (!iommu || !of_device_is_available(iommu->parent)) {
1409                         dev_dbg(dev, "no iommu attached for %s, using non-iommu buffers\n",
1410                                 port->parent->full_name);
1411                         /*
1412                          * if there is a crtc not support iommu, force set all
1413                          * crtc use non-iommu buffer.
1414                          */
1415                         is_support_iommu = false;
1416                 }
1417
1418                 component_match_add(dev, &match, compare_of, port->parent);
1419                 of_node_put(port);
1420         }
1421
1422         if (i == 0) {
1423                 dev_err(dev, "missing 'ports' property\n");
1424                 return -ENODEV;
1425         }
1426
1427         if (!match) {
1428                 dev_err(dev, "No available vop found for display-subsystem.\n");
1429                 return -ENODEV;
1430         }
1431         /*
1432          * For each bound crtc, bind the encoders attached to its
1433          * remote endpoint.
1434          */
1435         for (i = 0;; i++) {
1436                 port = of_parse_phandle(np, "ports", i);
1437                 if (!port)
1438                         break;
1439
1440                 if (!of_device_is_available(port->parent)) {
1441                         of_node_put(port);
1442                         continue;
1443                 }
1444
1445                 rockchip_add_endpoints(dev, &match, port);
1446                 of_node_put(port);
1447         }
1448
1449         return component_master_add_with_match(dev, &rockchip_drm_ops, match);
1450 }
1451
1452 static int rockchip_drm_platform_remove(struct platform_device *pdev)
1453 {
1454         component_master_del(&pdev->dev, &rockchip_drm_ops);
1455
1456         return 0;
1457 }
1458
1459 static const struct of_device_id rockchip_drm_dt_ids[] = {
1460         { .compatible = "rockchip,display-subsystem", },
1461         { /* sentinel */ },
1462 };
1463 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
1464
1465 static struct platform_driver rockchip_drm_platform_driver = {
1466         .probe = rockchip_drm_platform_probe,
1467         .remove = rockchip_drm_platform_remove,
1468         .driver = {
1469                 .name = "rockchip-drm",
1470                 .of_match_table = rockchip_drm_dt_ids,
1471                 .pm = &rockchip_drm_pm_ops,
1472         },
1473 };
1474
1475 module_platform_driver(rockchip_drm_platform_driver);
1476
1477 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
1478 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
1479 MODULE_LICENSE("GPL v2");