drivers/gpu/drm/rockchip/rockchip_drm_drv.c

   1 /*
   2  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
   3  * Author:Mark Yao <mark.yao@rock-chips.com>
   4  *
   5  * based on exynos_drm_drv.c
   6  *
   7  * This software is licensed under the terms of the GNU General Public
   8  * License version 2, as published by the Free Software Foundation, and
   9  * may be copied, distributed, and modified under those terms.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/dma-iommu.h>
  18
  19 #include <drm/drmP.h>
  20 #include <drm/drm_atomic.h>
  21 #include <drm/drm_crtc_helper.h>
  22 #include <drm/drm_fb_helper.h>
  23 #include <drm/drm_sync_helper.h>
  24 #include <drm/rockchip_drm.h>
  25 #include <linux/dma-mapping.h>
  26 #include <linux/pm_runtime.h>
  27 #include <linux/memblock.h>
  28 #include <linux/module.h>
  29 #include <linux/of_address.h>
  30 #include <linux/of_graph.h>
  31 #include <linux/component.h>
  32 #include <linux/fence.h>
  33 #include <linux/console.h>
  34
  35 #include "rockchip_drm_drv.h"
  36 #include "rockchip_drm_fb.h"
  37 #include "rockchip_drm_fbdev.h"
  38 #include "rockchip_drm_gem.h"
  39 #include "rockchip_drm_rga.h"
  40
  41 #define DRIVER_NAME     "rockchip"
  42 #define DRIVER_DESC     "RockChip Soc DRM"
  43 #define DRIVER_DATE     "20140818"
  44 #define DRIVER_MAJOR    1
  45 #define DRIVER_MINOR    0
  46
  47 static LIST_HEAD(rockchip_drm_subdrv_list);
  48 static DEFINE_MUTEX(subdrv_list_mutex);
  49
  50 struct rockchip_drm_mode_set {
  51         struct list_head head;
  52         struct drm_framebuffer *fb;
  53         struct drm_connector *connector;
  54         struct drm_crtc *crtc;
  55         struct drm_display_mode *mode;
  56         int hdisplay;
  57         int vdisplay;
  58         int vrefresh;
  59
  60         bool mode_changed;
  61         bool ymirror;
  62         int ratio;
  63 };
  64
  65 static struct drm_crtc *find_crtc_by_node(struct drm_device *drm_dev,
  66                                           struct device_node *node)
  67 {
  68         struct device_node *np_crtc;
  69         struct drm_crtc *crtc;
  70
  71         np_crtc = of_get_parent(node);
  72         if (!np_crtc || !of_device_is_available(np_crtc))
  73                 return NULL;
  74
  75         drm_for_each_crtc(crtc, drm_dev) {
  76                 if (crtc->port == np_crtc)
  77                         return crtc;
  78         }
  79
  80         return NULL;
  81 }
  82
  83 static struct drm_connector *find_connector_by_node(struct drm_device *drm_dev,
  84                                                     struct device_node *node)
  85 {
  86         struct device_node *np_connector;
  87         struct drm_connector *connector;
  88
  89         np_connector = of_graph_get_remote_port_parent(node);
  90         if (!np_connector || !of_device_is_available(np_connector))
  91                 return NULL;
  92
  93         drm_for_each_connector(connector, drm_dev) {
  94                 if (connector->port == np_connector)
  95                         return connector;
  96         }
  97
  98         return NULL;
  99 }
 100
 101 static int init_loader_memory(struct drm_device *drm_dev)
 102 {
 103         struct rockchip_drm_private *private = drm_dev->dev_private;
 104         struct rockchip_logo *logo;
 105         struct device_node *np = drm_dev->dev->of_node;
 106         struct device_node *node;
 107         unsigned long nr_pages;
 108         struct page **pages;
 109         struct sg_table *sgt;
 110         DEFINE_DMA_ATTRS(attrs);
 111         phys_addr_t start, size;
 112         struct resource res;
 113         int i, ret;
 114
 115         logo = devm_kmalloc(drm_dev->dev, sizeof(*logo), GFP_KERNEL);
 116         if (!logo)
 117                 return -ENOMEM;
 118
 119         node = of_parse_phandle(np, "memory-region", 0);
 120         if (!node)
 121                 return -ENOMEM;
 122
 123         ret = of_address_to_resource(node, 0, &res);
 124         if (ret)
 125                 return ret;
 126         start = res.start;
 127         size = resource_size(&res);
 128         if (!size)
 129                 return -ENOMEM;
 130
 131         nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
 132         pages = kmalloc_array(nr_pages, sizeof(*pages), GFP_KERNEL);
 133         if (!pages)
 134                 return -ENOMEM;
 135         i = 0;
 136         while (i < nr_pages) {
 137                 pages[i] = phys_to_page(start);
 138                 start += PAGE_SIZE;
 139                 i++;
 140         }
 141         sgt = drm_prime_pages_to_sg(pages, nr_pages);
 142         if (IS_ERR(sgt)) {
 143                 kfree(pages);
 144                 return PTR_ERR(sgt);
 145         }
 146
 147         dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
 148         dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &attrs);
 149         dma_map_sg_attrs(drm_dev->dev, sgt->sgl, sgt->nents,
 150                          DMA_TO_DEVICE, &attrs);
 151         logo->dma_addr = sg_dma_address(sgt->sgl);
 152         logo->sgt = sgt;
 153         logo->start = res.start;
 154         logo->size = size;
 155         logo->count = 0;
 156         private->logo = logo;
 157
 158         return 0;
 159 }
 160
 161 static struct drm_framebuffer *
 162 get_framebuffer_by_node(struct drm_device *drm_dev, struct device_node *node)
 163 {
 164         struct rockchip_drm_private *private = drm_dev->dev_private;
 165         struct drm_mode_fb_cmd2 mode_cmd = { 0 };
 166         u32 val;
 167         int bpp;
 168
 169         if (WARN_ON(!private->logo))
 170                 return NULL;
 171
 172         if (of_property_read_u32(node, "logo,offset", &val)) {
 173                 pr_err("%s: failed to get logo,offset\n", __func__);
 174                 return NULL;
 175         }
 176         mode_cmd.offsets[0] = val;
 177
 178         if (of_property_read_u32(node, "logo,width", &val)) {
 179                 pr_err("%s: failed to get logo,width\n", __func__);
 180                 return NULL;
 181         }
 182         mode_cmd.width = val;
 183
 184         if (of_property_read_u32(node, "logo,height", &val)) {
 185                 pr_err("%s: failed to get logo,height\n", __func__);
 186                 return NULL;
 187         }
 188         mode_cmd.height = val;
 189
 190         if (of_property_read_u32(node, "logo,bpp", &val)) {
 191                 pr_err("%s: failed to get logo,bpp\n", __func__);
 192                 return NULL;
 193         }
 194         bpp = val;
 195
 196         mode_cmd.pitches[0] = mode_cmd.width * bpp / 8;
 197
 198         switch (bpp) {
 199         case 16:
 200                 mode_cmd.pixel_format = DRM_FORMAT_BGR565;
 201                 break;
 202         case 24:
 203                 mode_cmd.pixel_format = DRM_FORMAT_BGR888;
 204                 break;
 205         case 32:
 206                 mode_cmd.pixel_format = DRM_FORMAT_XBGR8888;
 207                 break;
 208         default:
 209                 pr_err("%s: unsupport to logo bpp %d\n", __func__, bpp);
 210                 return NULL;
 211         }
 212
 213         return rockchip_fb_alloc(drm_dev, &mode_cmd, NULL, private->logo, 1);
 214 }
 215
 216 static struct rockchip_drm_mode_set *
 217 of_parse_display_resource(struct drm_device *drm_dev, struct device_node *route)
 218 {
 219         struct rockchip_drm_mode_set *set;
 220         struct device_node *connect;
 221         struct drm_framebuffer *fb;
 222         struct drm_connector *connector;
 223         struct drm_crtc *crtc;
 224         const char *string;
 225         u32 val;
 226
 227         connect = of_parse_phandle(route, "connect", 0);
 228         if (!connect)
 229                 return NULL;
 230
 231         fb = get_framebuffer_by_node(drm_dev, route);
 232         if (IS_ERR_OR_NULL(fb))
 233                 return NULL;
 234
 235         crtc = find_crtc_by_node(drm_dev, connect);
 236         connector = find_connector_by_node(drm_dev, connect);
 237         if (!crtc || !connector) {
 238                 dev_warn(drm_dev->dev,
 239                          "No available crtc or connector for display");
 240                 drm_framebuffer_unreference(fb);
 241                 return NULL;
 242         }
 243
 244         set = kzalloc(sizeof(*set), GFP_KERNEL);
 245         if (!set)
 246                 return NULL;
 247
 248         if (!of_property_read_u32(route, "video,hdisplay", &val))
 249                 set->hdisplay = val;
 250
 251         if (!of_property_read_u32(route, "video,vdisplay", &val))
 252                 set->vdisplay = val;
 253
 254         if (!of_property_read_u32(route, "video,vrefresh", &val))
 255                 set->vrefresh = val;
 256
 257         if (!of_property_read_u32(route, "logo,ymirror", &val))
 258                 set->ymirror = val;
 259
 260         set->ratio = 1;
 261         if (!of_property_read_string(route, "logo,mode", &string) &&
 262             !strcmp(string, "fullscreen"))
 263                         set->ratio = 0;
 264
 265         set->fb = fb;
 266         set->crtc = crtc;
 267         set->connector = connector;
 268
 269         return set;
 270 }
 271
 272 int setup_initial_state(struct drm_device *drm_dev,
 273                         struct drm_atomic_state *state,
 274                         struct rockchip_drm_mode_set *set)
 275 {
 276         struct drm_connector *connector = set->connector;
 277         struct drm_crtc *crtc = set->crtc;
 278         struct drm_crtc_state *crtc_state;
 279         struct drm_connector_state *conn_state;
 280         struct drm_plane_state *primary_state;
 281         struct drm_display_mode *mode = NULL;
 282         const struct drm_connector_helper_funcs *funcs;
 283         bool is_crtc_enabled = true;
 284         int hdisplay, vdisplay;
 285         int fb_width, fb_height;
 286         int found = 0, match = 0;
 287         int num_modes;
 288         int ret = 0;
 289
 290         if (!set->hdisplay || !set->vdisplay || !set->vrefresh)
 291                 is_crtc_enabled = false;
 292
 293         conn_state = drm_atomic_get_connector_state(state, connector);
 294         if (IS_ERR(conn_state))
 295                 return PTR_ERR(conn_state);
 296
 297         funcs = connector->helper_private;
 298         conn_state->best_encoder = funcs->best_encoder(connector);
 299         num_modes = connector->funcs->fill_modes(connector, 4096, 4096);
 300         if (!num_modes) {
 301                 dev_err(drm_dev->dev, "connector[%s] can't found any modes\n",
 302                         connector->name);
 303                 return -EINVAL;
 304         }
 305
 306         list_for_each_entry(mode, &connector->modes, head) {
 307                 if (mode->hdisplay == set->hdisplay &&
 308                     mode->vdisplay == set->vdisplay &&
 309                     drm_mode_vrefresh(mode) == set->vrefresh) {
 310                         found = 1;
 311                         match = 1;
 312                         break;
 313                 }
 314         }
 315
 316         if (!found) {
 317                 list_for_each_entry(mode, &connector->modes, head) {
 318                         if (mode->type & DRM_MODE_TYPE_PREFERRED) {
 319                                 found = 1;
 320                                 break;
 321                         }
 322                 }
 323
 324                 if (!found) {
 325                         mode = list_first_entry_or_null(&connector->modes,
 326                                                         struct drm_display_mode,
 327                                                         head);
 328                         if (!mode) {
 329                                 pr_err("failed to find available modes\n");
 330                                 return -EINVAL;
 331                         }
 332                 }
 333         }
 334
 335         set->mode = mode;
 336         crtc_state = drm_atomic_get_crtc_state(state, crtc);
 337         if (IS_ERR(crtc_state))
 338                 return PTR_ERR(crtc_state);
 339
 340         drm_mode_copy(&crtc_state->adjusted_mode, mode);
 341         if (!match || !is_crtc_enabled) {
 342                 set->mode_changed = true;
 343         } else {
 344                 ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
 345                 if (ret)
 346                         return ret;
 347
 348                 ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
 349                 if (ret)
 350                         return ret;
 351
 352                 crtc_state->active = true;
 353         }
 354
 355         if (!set->fb)
 356                 return 0;
 357         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 358         if (IS_ERR(primary_state))
 359                 return PTR_ERR(primary_state);
 360
 361         hdisplay = mode->hdisplay;
 362         vdisplay = mode->vdisplay;
 363         fb_width = set->fb->width;
 364         fb_height = set->fb->height;
 365
 366         primary_state->crtc = crtc;
 367         primary_state->src_x = 0;
 368         primary_state->src_y = 0;
 369         primary_state->src_w = fb_width << 16;
 370         primary_state->src_h = fb_height << 16;
 371         if (set->ratio) {
 372                 if (set->fb->width >= hdisplay) {
 373                         primary_state->crtc_x = 0;
 374                         primary_state->crtc_w = hdisplay;
 375                 } else {
 376                         primary_state->crtc_x = (hdisplay - fb_width) / 2;
 377                         primary_state->crtc_w = set->fb->width;
 378                 }
 379
 380                 if (set->fb->height >= vdisplay) {
 381                         primary_state->crtc_y = 0;
 382                         primary_state->crtc_h = vdisplay;
 383                 } else {
 384                         primary_state->crtc_y = (vdisplay - fb_height) / 2;
 385                         primary_state->crtc_h = fb_height;
 386                 }
 387         } else {
 388                 primary_state->crtc_x = 0;
 389                 primary_state->crtc_y = 0;
 390                 primary_state->crtc_w = hdisplay;
 391                 primary_state->crtc_h = vdisplay;
 392         }
 393
 394         return 0;
 395 }
 396
 397 static int update_state(struct drm_device *drm_dev,
 398                         struct drm_atomic_state *state,
 399                         struct rockchip_drm_mode_set *set,
 400                         unsigned int *plane_mask)
 401 {
 402         struct drm_mode_config *mode_config = &drm_dev->mode_config;
 403         struct drm_crtc *crtc = set->crtc;
 404         struct drm_connector *connector = set->connector;
 405         struct drm_display_mode *mode = set->mode;
 406         struct drm_plane_state *primary_state;
 407         struct drm_crtc_state *crtc_state;
 408         struct drm_connector_state *conn_state;
 409         int ret;
 410
 411         crtc_state = drm_atomic_get_crtc_state(state, crtc);
 412         if (IS_ERR(crtc_state))
 413                 return PTR_ERR(crtc_state);
 414         conn_state = drm_atomic_get_connector_state(state, connector);
 415         if (IS_ERR(conn_state))
 416                 return PTR_ERR(conn_state);
 417
 418         if (set->mode_changed) {
 419                 ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
 420                 if (ret)
 421                         return ret;
 422
 423                 ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
 424                 if (ret)
 425                         return ret;
 426
 427                 crtc_state->active = true;
 428         } else {
 429                 const struct drm_crtc_helper_funcs *funcs;
 430                 const struct drm_encoder_helper_funcs *encoder_helper_funcs;
 431                 const struct drm_connector_helper_funcs *connector_helper_funcs;
 432                 struct drm_encoder *encoder;
 433
 434                 funcs = crtc->helper_private;
 435                 connector_helper_funcs = connector->helper_private;
 436                 if (!funcs || !funcs->enable ||
 437                     !connector_helper_funcs ||
 438                     !connector_helper_funcs->best_encoder)
 439                         return -ENXIO;
 440                 encoder = connector_helper_funcs->best_encoder(connector);
 441                 encoder_helper_funcs = encoder->helper_private;
 442                 if (!encoder || !encoder_helper_funcs->atomic_check)
 443                         return -ENXIO;
 444                 ret = encoder_helper_funcs->atomic_check(encoder, crtc->state,
 445                                                          conn_state);
 446                 if (ret)
 447                         return ret;
 448                 funcs->enable(crtc);
 449         }
 450
 451         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 452         if (IS_ERR(primary_state))
 453                 return PTR_ERR(primary_state);
 454
 455         crtc_state->plane_mask = 1 << drm_plane_index(crtc->primary);
 456         *plane_mask |= crtc_state->plane_mask;
 457
 458         drm_atomic_set_fb_for_plane(primary_state, set->fb);
 459         drm_framebuffer_unreference(set->fb);
 460         ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
 461
 462         if (set->ymirror)
 463                 /*
 464                  * TODO:
 465                  * some vop maybe not support ymirror, but force use it now.
 466                  */
 467                 drm_atomic_plane_set_property(crtc->primary, primary_state,
 468                                               mode_config->rotation_property,
 469                                               BIT(DRM_REFLECT_Y));
 470
 471         return ret;
 472 }
 473
 474 static void show_loader_logo(struct drm_device *drm_dev)
 475 {
 476         struct drm_atomic_state *state;
 477         struct device_node *np = drm_dev->dev->of_node;
 478         struct drm_mode_config *mode_config = &drm_dev->mode_config;
 479         struct device_node *root, *route;
 480         struct rockchip_drm_mode_set *set, *tmp;
 481         struct list_head mode_set_list;
 482         unsigned plane_mask = 0;
 483         int ret;
 484
 485         root = of_get_child_by_name(np, "route");
 486         if (!root) {
 487                 dev_warn(drm_dev->dev, "failed to parse display resources\n");
 488                 return;
 489         }
 490
 491         if (init_loader_memory(drm_dev)) {
 492                 dev_warn(drm_dev->dev, "failed to parse loader memory\n");
 493                 return;
 494         }
 495
 496         INIT_LIST_HEAD(&mode_set_list);
 497         drm_modeset_lock_all(drm_dev);
 498         state = drm_atomic_state_alloc(drm_dev);
 499         if (!state) {
 500                 dev_err(drm_dev->dev, "failed to alloc atomic state\n");
 501                 ret = -ENOMEM;
 502                 goto err_unlock;
 503         }
 504
 505         state->acquire_ctx = mode_config->acquire_ctx;
 506
 507         for_each_child_of_node(root, route) {
 508                 set = of_parse_display_resource(drm_dev, route);
 509                 if (!set)
 510                         continue;
 511
 512                 if (setup_initial_state(drm_dev, state, set)) {
 513                         drm_framebuffer_unreference(set->fb);
 514                         kfree(set);
 515                         continue;
 516                 }
 517                 INIT_LIST_HEAD(&set->head);
 518                 list_add_tail(&set->head, &mode_set_list);
 519         }
 520
 521         if (list_empty(&mode_set_list)) {
 522                 dev_warn(drm_dev->dev, "can't not find any loader display\n");
 523                 ret = -ENXIO;
 524                 goto err_free_state;
 525         }
 526
 527         /*
 528          * The state save initial devices status, swap the state into
 529          * drm deivces as old state, so if new state come, can compare
 530          * with this state to judge which status need to update.
 531          */
 532         drm_atomic_helper_swap_state(drm_dev, state);
 533         drm_atomic_state_free(state);
 534         state = drm_atomic_helper_duplicate_state(drm_dev,
 535                                                   mode_config->acquire_ctx);
 536         if (IS_ERR(state)) {
 537                 dev_err(drm_dev->dev, "failed to duplicate atomic state\n");
 538                 ret = PTR_ERR_OR_ZERO(state);
 539                 goto err_unlock;
 540         }
 541         state->acquire_ctx = mode_config->acquire_ctx;
 542         list_for_each_entry(set, &mode_set_list, head)
 543                 /*
 544                  * We don't want to see any fail on update_state.
 545                  */
 546                 WARN_ON(update_state(drm_dev, state, set, &plane_mask));
 547
 548         ret = drm_atomic_commit(state);
 549         drm_atomic_clean_old_fb(drm_dev, plane_mask, ret);
 550
 551         list_for_each_entry_safe(set, tmp, &mode_set_list, head) {
 552                 struct drm_crtc *crtc = set->crtc;
 553
 554                 list_del(&set->head);
 555                 kfree(set);
 556
 557                 /* FIXME:
 558                  * primary plane state rotation is not BIT(0), but we only want
 559                  * it effect on logo display, userspace may not known to clean
 560                  * this property, would get unexpect display, so force set
 561                  * primary rotation to BIT(0).
 562                  */
 563                 if (!crtc->primary || !crtc->primary->state)
 564                         continue;
 565
 566                 drm_atomic_plane_set_property(crtc->primary,
 567                                               crtc->primary->state,
 568                                               mode_config->rotation_property,
 569                                               BIT(0));
 570         }
 571
 572         /*
 573          * Is possible get deadlock here?
 574          */
 575         WARN_ON(ret == -EDEADLK);
 576
 577         if (ret)
 578                 goto err_free_state;
 579
 580         drm_modeset_unlock_all(drm_dev);
 581         return;
 582
 583 err_free_state:
 584         drm_atomic_state_free(state);
 585 err_unlock:
 586         drm_modeset_unlock_all(drm_dev);
 587         if (ret)
 588                 dev_err(drm_dev->dev, "failed to show loader logo\n");
 589 }
 590
 591 /*
 592  * Attach a (component) device to the shared drm dma mapping from master drm
 593  * device.  This is used by the VOPs to map GEM buffers to a common DMA
 594  * mapping.
 595  */
 596 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
 597                                    struct device *dev)
 598 {
 599         struct rockchip_drm_private *private = drm_dev->dev_private;
 600         struct iommu_domain *domain = private->domain;
 601         int ret;
 602
 603         ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
 604         if (ret)
 605                 return ret;
 606
 607         dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
 608         ret = iommu_attach_device(domain, dev);
 609         if (ret) {
 610                 dev_err(dev, "Failed to attach iommu device\n");
 611                 return ret;
 612         }
 613
 614         if (!common_iommu_setup_dma_ops(dev, 0x10000000, SZ_2G, domain->ops)) {
 615                 dev_err(dev, "Failed to set dma_ops\n");
 616                 iommu_detach_device(domain, dev);
 617                 ret = -ENODEV;
 618         }
 619
 620         return ret;
 621 }
 622
 623 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
 624                                     struct device *dev)
 625 {
 626         struct rockchip_drm_private *private = drm_dev->dev_private;
 627         struct iommu_domain *domain = private->domain;
 628
 629         iommu_detach_device(domain, dev);
 630 }
 631
 632 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
 633                                  const struct rockchip_crtc_funcs *crtc_funcs)
 634 {
 635         int pipe = drm_crtc_index(crtc);
 636         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 637
 638         if (pipe > ROCKCHIP_MAX_CRTC)
 639                 return -EINVAL;
 640
 641         priv->crtc_funcs[pipe] = crtc_funcs;
 642
 643         return 0;
 644 }
 645
 646 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
 647 {
 648         int pipe = drm_crtc_index(crtc);
 649         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 650
 651         if (pipe > ROCKCHIP_MAX_CRTC)
 652                 return;
 653
 654         priv->crtc_funcs[pipe] = NULL;
 655 }
 656
 657 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
 658                                                 int pipe)
 659 {
 660         struct drm_crtc *crtc;
 661         int i = 0;
 662
 663         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 664                 if (i++ == pipe)
 665                         return crtc;
 666
 667         return NULL;
 668 }
 669
 670 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
 671                                            unsigned int pipe)
 672 {
 673         struct rockchip_drm_private *priv = dev->dev_private;
 674         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 675
 676         if (crtc && priv->crtc_funcs[pipe] &&
 677             priv->crtc_funcs[pipe]->enable_vblank)
 678                 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
 679
 680         return 0;
 681 }
 682
 683 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
 684                                              unsigned int pipe)
 685 {
 686         struct rockchip_drm_private *priv = dev->dev_private;
 687         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 688
 689         if (crtc && priv->crtc_funcs[pipe] &&
 690             priv->crtc_funcs[pipe]->enable_vblank)
 691                 priv->crtc_funcs[pipe]->disable_vblank(crtc);
 692 }
 693
 694 static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
 695 {
 696         struct rockchip_drm_private *private;
 697         struct device *dev = drm_dev->dev;
 698         struct drm_connector *connector;
 699         struct iommu_group *group;
 700         int ret;
 701
 702         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 703         if (!private)
 704                 return -ENOMEM;
 705
 706         mutex_init(&private->commit.lock);
 707         INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
 708
 709         drm_dev->dev_private = private;
 710
 711 #ifdef CONFIG_DRM_DMA_SYNC
 712         private->cpu_fence_context = fence_context_alloc(1);
 713         atomic_set(&private->cpu_fence_seqno, 0);
 714 #endif
 715
 716         drm_mode_config_init(drm_dev);
 717
 718         rockchip_drm_mode_config_init(drm_dev);
 719
 720         dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
 721                                       GFP_KERNEL);
 722         if (!dev->dma_parms) {
 723                 ret = -ENOMEM;
 724                 goto err_config_cleanup;
 725         }
 726
 727         private->domain = iommu_domain_alloc(&platform_bus_type);
 728         if (!private->domain)
 729                 return -ENOMEM;
 730
 731         ret = iommu_get_dma_cookie(private->domain);
 732         if (ret)
 733                 goto err_free_domain;
 734
 735         group = iommu_group_get(dev);
 736         if (!group) {
 737                 group = iommu_group_alloc();
 738                 if (IS_ERR(group)) {
 739                         dev_err(dev, "Failed to allocate IOMMU group\n");
 740                         goto err_put_cookie;
 741                 }
 742
 743                 ret = iommu_group_add_device(group, dev);
 744                 iommu_group_put(group);
 745                 if (ret) {
 746                         dev_err(dev, "failed to add device to IOMMU group\n");
 747                         goto err_put_cookie;
 748                 }
 749         }
 750         /*
 751          * Attach virtual iommu device, sub iommu device can share the same
 752          * mapping with it.
 753          */
 754         ret = rockchip_drm_dma_attach_device(drm_dev, dev);
 755         if (ret)
 756                 goto err_group_remove_device;
 757
 758         /* Try to bind all sub drivers. */
 759         ret = component_bind_all(dev, drm_dev);
 760         if (ret)
 761                 goto err_detach_device;
 762
 763         /*
 764          * All components are now added, we can publish the connector sysfs
 765          * entries to userspace.  This will generate hotplug events and so
 766          * userspace will expect to be able to access DRM at this point.
 767          */
 768         list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
 769                         head) {
 770                 ret = drm_connector_register(connector);
 771                 if (ret) {
 772                         dev_err(drm_dev->dev,
 773                                 "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
 774                                 connector->base.id,
 775                                 connector->name, ret);
 776                         goto err_unbind;
 777                 }
 778         }
 779
 780         /* init kms poll for handling hpd */
 781         drm_kms_helper_poll_init(drm_dev);
 782
 783         /*
 784          * enable drm irq mode.
 785          * - with irq_enabled = true, we can use the vblank feature.
 786          */
 787         drm_dev->irq_enabled = true;
 788
 789         ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
 790         if (ret)
 791                 goto err_kms_helper_poll_fini;
 792
 793         /*
 794          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 795          * by drm timer once a current process gives up ownership of
 796          * vblank event.(after drm_vblank_put function is called)
 797          */
 798         drm_dev->vblank_disable_allowed = true;
 799
 800         drm_mode_config_reset(drm_dev);
 801
 802         show_loader_logo(drm_dev);
 803
 804         ret = rockchip_drm_fbdev_init(drm_dev);
 805         if (ret)
 806                 goto err_vblank_cleanup;
 807
 808         drm_dev->mode_config.allow_fb_modifiers = true;
 809
 810         return 0;
 811 err_vblank_cleanup:
 812         drm_vblank_cleanup(drm_dev);
 813 err_kms_helper_poll_fini:
 814         drm_kms_helper_poll_fini(drm_dev);
 815 err_unbind:
 816         component_unbind_all(dev, drm_dev);
 817 err_detach_device:
 818         rockchip_drm_dma_detach_device(drm_dev, dev);
 819 err_group_remove_device:
 820         iommu_group_remove_device(dev);
 821 err_put_cookie:
 822         iommu_put_dma_cookie(private->domain);
 823 err_free_domain:
 824         iommu_domain_free(private->domain);
 825 err_config_cleanup:
 826         drm_mode_config_cleanup(drm_dev);
 827         drm_dev->dev_private = NULL;
 828         return ret;
 829 }
 830
 831 static int rockchip_drm_unload(struct drm_device *drm_dev)
 832 {
 833         struct device *dev = drm_dev->dev;
 834         struct rockchip_drm_private *private = drm_dev->dev_private;
 835
 836         rockchip_drm_fbdev_fini(drm_dev);
 837         drm_vblank_cleanup(drm_dev);
 838         drm_kms_helper_poll_fini(drm_dev);
 839         component_unbind_all(dev, drm_dev);
 840         rockchip_drm_dma_detach_device(drm_dev, dev);
 841         iommu_group_remove_device(dev);
 842         iommu_put_dma_cookie(private->domain);
 843         iommu_domain_free(private->domain);
 844         drm_mode_config_cleanup(drm_dev);
 845         drm_dev->dev_private = NULL;
 846
 847         return 0;
 848 }
 849
 850 static void rockchip_drm_crtc_cancel_pending_vblank(struct drm_crtc *crtc,
 851                                                     struct drm_file *file_priv)
 852 {
 853         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 854         int pipe = drm_crtc_index(crtc);
 855
 856         if (pipe < ROCKCHIP_MAX_CRTC &&
 857             priv->crtc_funcs[pipe] &&
 858             priv->crtc_funcs[pipe]->cancel_pending_vblank)
 859                 priv->crtc_funcs[pipe]->cancel_pending_vblank(crtc, file_priv);
 860 }
 861
 862 int rockchip_drm_register_subdrv(struct drm_rockchip_subdrv *subdrv)
 863 {
 864         if (!subdrv)
 865                 return -EINVAL;
 866
 867         mutex_lock(&subdrv_list_mutex);
 868         list_add_tail(&subdrv->list, &rockchip_drm_subdrv_list);
 869         mutex_unlock(&subdrv_list_mutex);
 870
 871         return 0;
 872 }
 873 EXPORT_SYMBOL_GPL(rockchip_drm_register_subdrv);
 874
 875 int rockchip_drm_unregister_subdrv(struct drm_rockchip_subdrv *subdrv)
 876 {
 877         if (!subdrv)
 878                 return -EINVAL;
 879
 880         mutex_lock(&subdrv_list_mutex);
 881         list_del(&subdrv->list);
 882         mutex_unlock(&subdrv_list_mutex);
 883
 884         return 0;
 885 }
 886 EXPORT_SYMBOL_GPL(rockchip_drm_unregister_subdrv);
 887
 888 static int rockchip_drm_open(struct drm_device *dev, struct drm_file *file)
 889 {
 890         struct rockchip_drm_file_private *file_priv;
 891         struct drm_rockchip_subdrv *subdrv;
 892         int ret = 0;
 893
 894         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
 895         if (!file_priv)
 896                 return -ENOMEM;
 897         INIT_LIST_HEAD(&file_priv->gem_cpu_acquire_list);
 898
 899         file->driver_priv = file_priv;
 900
 901         mutex_lock(&subdrv_list_mutex);
 902         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list) {
 903                 ret = subdrv->open(dev, subdrv->dev, file);
 904                 if (ret) {
 905                         mutex_unlock(&subdrv_list_mutex);
 906                         goto err_free_file_priv;
 907                 }
 908         }
 909         mutex_unlock(&subdrv_list_mutex);
 910
 911         return 0;
 912
 913 err_free_file_priv:
 914         kfree(file_priv);
 915         file_priv = NULL;
 916
 917         return ret;
 918 }
 919
 920 static void rockchip_drm_preclose(struct drm_device *dev,
 921                                   struct drm_file *file_priv)
 922 {
 923         struct rockchip_drm_file_private *file_private = file_priv->driver_priv;
 924         struct rockchip_gem_object_node *cur, *d;
 925         struct drm_rockchip_subdrv *subdrv;
 926         struct drm_crtc *crtc;
 927
 928         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 929                 rockchip_drm_crtc_cancel_pending_vblank(crtc, file_priv);
 930
 931         mutex_lock(&dev->struct_mutex);
 932         list_for_each_entry_safe(cur, d,
 933                         &file_private->gem_cpu_acquire_list, list) {
 934 #ifdef CONFIG_DRM_DMA_SYNC
 935                 BUG_ON(!cur->rockchip_gem_obj->acquire_fence);
 936                 drm_fence_signal_and_put(&cur->rockchip_gem_obj->acquire_fence);
 937 #endif
 938                 drm_gem_object_unreference(&cur->rockchip_gem_obj->base);
 939                 kfree(cur);
 940         }
 941         /* since we are deleting the whole list, just initialize the header
 942          * instead of calling list_del for every element
 943          */
 944         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
 945         mutex_unlock(&dev->struct_mutex);
 946
 947         mutex_lock(&subdrv_list_mutex);
 948         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list)
 949                 subdrv->close(dev, subdrv->dev, file_priv);
 950         mutex_unlock(&subdrv_list_mutex);
 951 }
 952
 953 static void rockchip_drm_postclose(struct drm_device *dev, struct drm_file *file)
 954 {
 955         kfree(file->driver_priv);
 956         file->driver_priv = NULL;
 957 }
 958
 959 void rockchip_drm_lastclose(struct drm_device *dev)
 960 {
 961         struct rockchip_drm_private *priv = dev->dev_private;
 962
 963         drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev_helper);
 964 }
 965
 966 static const struct drm_ioctl_desc rockchip_ioctls[] = {
 967         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CREATE, rockchip_gem_create_ioctl,
 968                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 969         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_MAP_OFFSET,
 970                           rockchip_gem_map_offset_ioctl,
 971                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 972         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_ACQUIRE,
 973                           rockchip_gem_cpu_acquire_ioctl,
 974                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 975         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_RELEASE,
 976                           rockchip_gem_cpu_release_ioctl,
 977                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 978         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_GET_VER, rockchip_rga_get_ver_ioctl,
 979                           DRM_AUTH | DRM_RENDER_ALLOW),
 980         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_SET_CMDLIST,
 981                           rockchip_rga_set_cmdlist_ioctl,
 982                           DRM_AUTH | DRM_RENDER_ALLOW),
 983         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_EXEC, rockchip_rga_exec_ioctl,
 984                           DRM_AUTH | DRM_RENDER_ALLOW),
 985 };
 986
 987 static const struct file_operations rockchip_drm_driver_fops = {
 988         .owner = THIS_MODULE,
 989         .open = drm_open,
 990         .mmap = rockchip_gem_mmap,
 991         .poll = drm_poll,
 992         .read = drm_read,
 993         .unlocked_ioctl = drm_ioctl,
 994 #ifdef CONFIG_COMPAT
 995         .compat_ioctl = drm_compat_ioctl,
 996 #endif
 997         .release = drm_release,
 998 };
 999
1000 const struct vm_operations_struct rockchip_drm_vm_ops = {
1001         .open = drm_gem_vm_open,
1002         .close = drm_gem_vm_close,
1003 };
1004
1005 static struct drm_driver rockchip_drm_driver = {
1006         .driver_features        = DRIVER_MODESET | DRIVER_GEM |
1007                                   DRIVER_PRIME | DRIVER_ATOMIC |
1008                                   DRIVER_RENDER,
1009         .load                   = rockchip_drm_load,
1010         .unload                 = rockchip_drm_unload,
1011         .preclose               = rockchip_drm_preclose,
1012         .lastclose              = rockchip_drm_lastclose,
1013         .get_vblank_counter     = drm_vblank_no_hw_counter,
1014         .open                   = rockchip_drm_open,
1015         .postclose              = rockchip_drm_postclose,
1016         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
1017         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
1018         .gem_vm_ops             = &rockchip_drm_vm_ops,
1019         .gem_free_object        = rockchip_gem_free_object,
1020         .dumb_create            = rockchip_gem_dumb_create,
1021         .dumb_map_offset        = rockchip_gem_dumb_map_offset,
1022         .dumb_destroy           = drm_gem_dumb_destroy,
1023         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
1024         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
1025         .gem_prime_import       = drm_gem_prime_import,
1026         .gem_prime_import_sg_table = rockchip_gem_prime_import_sg_table,
1027         .gem_prime_export       = drm_gem_prime_export,
1028         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
1029         .gem_prime_vmap         = rockchip_gem_prime_vmap,
1030         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
1031         .gem_prime_mmap         = rockchip_gem_mmap_buf,
1032         .ioctls                 = rockchip_ioctls,
1033         .num_ioctls             = ARRAY_SIZE(rockchip_ioctls),
1034         .fops                   = &rockchip_drm_driver_fops,
1035         .name   = DRIVER_NAME,
1036         .desc   = DRIVER_DESC,
1037         .date   = DRIVER_DATE,
1038         .major  = DRIVER_MAJOR,
1039         .minor  = DRIVER_MINOR,
1040 };
1041
1042 #ifdef CONFIG_PM_SLEEP
1043 void rockchip_drm_fb_suspend(struct drm_device *drm)
1044 {
1045         struct rockchip_drm_private *priv = drm->dev_private;
1046
1047         console_lock();
1048         drm_fb_helper_set_suspend(priv->fbdev_helper, 1);
1049         console_unlock();
1050 }
1051
1052 void rockchip_drm_fb_resume(struct drm_device *drm)
1053 {
1054         struct rockchip_drm_private *priv = drm->dev_private;
1055
1056         console_lock();
1057         drm_fb_helper_set_suspend(priv->fbdev_helper, 0);
1058         console_unlock();
1059 }
1060
1061 static int rockchip_drm_sys_suspend(struct device *dev)
1062 {
1063         struct drm_device *drm = dev_get_drvdata(dev);
1064         struct rockchip_drm_private *priv = drm->dev_private;
1065
1066         drm_kms_helper_poll_disable(drm);
1067         rockchip_drm_fb_suspend(drm);
1068
1069         priv->state = drm_atomic_helper_suspend(drm);
1070         if (IS_ERR(priv->state)) {
1071                 rockchip_drm_fb_resume(drm);
1072                 drm_kms_helper_poll_enable(drm);
1073                 return PTR_ERR(priv->state);
1074         }
1075
1076         return 0;
1077 }
1078
1079 static int rockchip_drm_sys_resume(struct device *dev)
1080 {
1081         struct drm_device *drm = dev_get_drvdata(dev);
1082         struct rockchip_drm_private *priv = drm->dev_private;
1083
1084         drm_atomic_helper_resume(drm, priv->state);
1085         rockchip_drm_fb_resume(drm);
1086         drm_kms_helper_poll_enable(drm);
1087
1088         return 0;
1089 }
1090 #endif
1091
1092 static const struct dev_pm_ops rockchip_drm_pm_ops = {
1093         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
1094                                 rockchip_drm_sys_resume)
1095 };
1096
1097 static int compare_of(struct device *dev, void *data)
1098 {
1099         struct device_node *np = data;
1100
1101         return dev->of_node == np;
1102 }
1103
1104 static void rockchip_add_endpoints(struct device *dev,
1105                                    struct component_match **match,
1106                                    struct device_node *port)
1107 {
1108         struct device_node *ep, *remote;
1109
1110         for_each_child_of_node(port, ep) {
1111                 remote = of_graph_get_remote_port_parent(ep);
1112                 if (!remote || !of_device_is_available(remote)) {
1113                         of_node_put(remote);
1114                         continue;
1115                 } else if (!of_device_is_available(remote->parent)) {
1116                         dev_warn(dev, "parent device of %s is not available\n",
1117                                  remote->full_name);
1118                         of_node_put(remote);
1119                         continue;
1120                 }
1121
1122                 component_match_add(dev, match, compare_of, remote);
1123                 of_node_put(remote);
1124         }
1125 }
1126
1127 static int rockchip_drm_bind(struct device *dev)
1128 {
1129         struct drm_device *drm;
1130         int ret;
1131
1132         drm = drm_dev_alloc(&rockchip_drm_driver, dev);
1133         if (!drm)
1134                 return -ENOMEM;
1135
1136         ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
1137         if (ret)
1138                 goto err_free;
1139
1140         ret = drm_dev_register(drm, 0);
1141         if (ret)
1142                 goto err_free;
1143
1144         dev_set_drvdata(dev, drm);
1145
1146         return 0;
1147
1148 err_free:
1149         drm_dev_unref(drm);
1150         return ret;
1151 }
1152
1153 static void rockchip_drm_unbind(struct device *dev)
1154 {
1155         struct drm_device *drm = dev_get_drvdata(dev);
1156
1157         drm_dev_unregister(drm);
1158         drm_dev_unref(drm);
1159         dev_set_drvdata(dev, NULL);
1160 }
1161
1162 static const struct component_master_ops rockchip_drm_ops = {
1163         .bind = rockchip_drm_bind,
1164         .unbind = rockchip_drm_unbind,
1165 };
1166
1167 static int rockchip_drm_platform_probe(struct platform_device *pdev)
1168 {
1169         struct device *dev = &pdev->dev;
1170         struct component_match *match = NULL;
1171         struct device_node *np = dev->of_node;
1172         struct device_node *port;
1173         int i;
1174
1175         if (!np)
1176                 return -ENODEV;
1177         /*
1178          * Bind the crtc ports first, so that
1179          * drm_of_find_possible_crtcs called from encoder .bind callbacks
1180          * works as expected.
1181          */
1182         for (i = 0;; i++) {
1183                 port = of_parse_phandle(np, "ports", i);
1184                 if (!port)
1185                         break;
1186
1187                 if (!of_device_is_available(port->parent)) {
1188                         of_node_put(port);
1189                         continue;
1190                 }
1191
1192                 component_match_add(dev, &match, compare_of, port->parent);
1193                 of_node_put(port);
1194         }
1195
1196         if (i == 0) {
1197                 dev_err(dev, "missing 'ports' property\n");
1198                 return -ENODEV;
1199         }
1200
1201         if (!match) {
1202                 dev_err(dev, "No available vop found for display-subsystem.\n");
1203                 return -ENODEV;
1204         }
1205         /*
1206          * For each bound crtc, bind the encoders attached to its
1207          * remote endpoint.
1208          */
1209         for (i = 0;; i++) {
1210                 port = of_parse_phandle(np, "ports", i);
1211                 if (!port)
1212                         break;
1213
1214                 if (!of_device_is_available(port->parent)) {
1215                         of_node_put(port);
1216                         continue;
1217                 }
1218
1219                 rockchip_add_endpoints(dev, &match, port);
1220                 of_node_put(port);
1221         }
1222
1223         return component_master_add_with_match(dev, &rockchip_drm_ops, match);
1224 }
1225
1226 static int rockchip_drm_platform_remove(struct platform_device *pdev)
1227 {
1228         component_master_del(&pdev->dev, &rockchip_drm_ops);
1229
1230         return 0;
1231 }
1232
1233 static const struct of_device_id rockchip_drm_dt_ids[] = {
1234         { .compatible = "rockchip,display-subsystem", },
1235         { /* sentinel */ },
1236 };
1237 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
1238
1239 static struct platform_driver rockchip_drm_platform_driver = {
1240         .probe = rockchip_drm_platform_probe,
1241         .remove = rockchip_drm_platform_remove,
1242         .driver = {
1243                 .name = "rockchip-drm",
1244                 .of_match_table = rockchip_drm_dt_ids,
1245                 .pm = &rockchip_drm_pm_ops,
1246         },
1247 };
1248
1249 module_platform_driver(rockchip_drm_platform_driver);
1250
1251 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
1252 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
1253 MODULE_LICENSE("GPL v2");