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 <asm/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         if (funcs->loader_protect)
 300                 funcs->loader_protect(connector, true);
 301         num_modes = connector->funcs->fill_modes(connector, 4096, 4096);
 302         if (!num_modes) {
 303                 dev_err(drm_dev->dev, "connector[%s] can't found any modes\n",
 304                         connector->name);
 305                 ret = -EINVAL;
 306                 goto error;
 307         }
 308
 309         list_for_each_entry(mode, &connector->modes, head) {
 310                 if (mode->hdisplay == set->hdisplay &&
 311                     mode->vdisplay == set->vdisplay &&
 312                     drm_mode_vrefresh(mode) == set->vrefresh) {
 313                         found = 1;
 314                         match = 1;
 315                         break;
 316                 }
 317         }
 318
 319         if (!found) {
 320                 list_for_each_entry(mode, &connector->modes, head) {
 321                         if (mode->type & DRM_MODE_TYPE_PREFERRED) {
 322                                 found = 1;
 323                                 break;
 324                         }
 325                 }
 326
 327                 if (!found) {
 328                         mode = list_first_entry_or_null(&connector->modes,
 329                                                         struct drm_display_mode,
 330                                                         head);
 331                         if (!mode) {
 332                                 pr_err("failed to find available modes\n");
 333                                 ret = -EINVAL;
 334                                 goto error;
 335                         }
 336                 }
 337         }
 338
 339         set->mode = mode;
 340         crtc_state = drm_atomic_get_crtc_state(state, crtc);
 341         if (IS_ERR(crtc_state)) {
 342                 ret = PTR_ERR(crtc_state);
 343                 goto error;
 344         }
 345
 346         drm_mode_copy(&crtc_state->adjusted_mode, mode);
 347         if (!match || !is_crtc_enabled) {
 348                 set->mode_changed = true;
 349         } else {
 350                 ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
 351                 if (ret)
 352                         goto error;
 353
 354                 ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
 355                 if (ret)
 356                         goto error;
 357
 358                 crtc_state->active = true;
 359         }
 360
 361         if (!set->fb) {
 362                 ret = 0;
 363                 goto error;
 364         }
 365         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 366         if (IS_ERR(primary_state)) {
 367                 ret = PTR_ERR(primary_state);
 368                 goto error;
 369         }
 370
 371         hdisplay = mode->hdisplay;
 372         vdisplay = mode->vdisplay;
 373         fb_width = set->fb->width;
 374         fb_height = set->fb->height;
 375
 376         primary_state->crtc = crtc;
 377         primary_state->src_x = 0;
 378         primary_state->src_y = 0;
 379         primary_state->src_w = fb_width << 16;
 380         primary_state->src_h = fb_height << 16;
 381         if (set->ratio) {
 382                 if (set->fb->width >= hdisplay) {
 383                         primary_state->crtc_x = 0;
 384                         primary_state->crtc_w = hdisplay;
 385                 } else {
 386                         primary_state->crtc_x = (hdisplay - fb_width) / 2;
 387                         primary_state->crtc_w = set->fb->width;
 388                 }
 389
 390                 if (set->fb->height >= vdisplay) {
 391                         primary_state->crtc_y = 0;
 392                         primary_state->crtc_h = vdisplay;
 393                 } else {
 394                         primary_state->crtc_y = (vdisplay - fb_height) / 2;
 395                         primary_state->crtc_h = fb_height;
 396                 }
 397         } else {
 398                 primary_state->crtc_x = 0;
 399                 primary_state->crtc_y = 0;
 400                 primary_state->crtc_w = hdisplay;
 401                 primary_state->crtc_h = vdisplay;
 402         }
 403
 404         return 0;
 405
 406 error:
 407         if (funcs->loader_protect)
 408                 funcs->loader_protect(connector, false);
 409         return ret;
 410 }
 411
 412 static int update_state(struct drm_device *drm_dev,
 413                         struct drm_atomic_state *state,
 414                         struct rockchip_drm_mode_set *set,
 415                         unsigned int *plane_mask)
 416 {
 417         struct drm_mode_config *mode_config = &drm_dev->mode_config;
 418         struct drm_crtc *crtc = set->crtc;
 419         struct drm_connector *connector = set->connector;
 420         struct drm_display_mode *mode = set->mode;
 421         struct drm_plane_state *primary_state;
 422         struct drm_crtc_state *crtc_state;
 423         struct drm_connector_state *conn_state;
 424         int ret;
 425
 426         crtc_state = drm_atomic_get_crtc_state(state, crtc);
 427         if (IS_ERR(crtc_state))
 428                 return PTR_ERR(crtc_state);
 429         conn_state = drm_atomic_get_connector_state(state, connector);
 430         if (IS_ERR(conn_state))
 431                 return PTR_ERR(conn_state);
 432
 433         if (set->mode_changed) {
 434                 ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
 435                 if (ret)
 436                         return ret;
 437
 438                 ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
 439                 if (ret)
 440                         return ret;
 441
 442                 crtc_state->active = true;
 443         } else {
 444                 const struct drm_crtc_helper_funcs *funcs;
 445                 const struct drm_encoder_helper_funcs *encoder_helper_funcs;
 446                 const struct drm_connector_helper_funcs *connector_helper_funcs;
 447                 struct drm_encoder *encoder;
 448
 449                 funcs = crtc->helper_private;
 450                 connector_helper_funcs = connector->helper_private;
 451                 if (!funcs || !funcs->enable ||
 452                     !connector_helper_funcs ||
 453                     !connector_helper_funcs->best_encoder)
 454                         return -ENXIO;
 455                 encoder = connector_helper_funcs->best_encoder(connector);
 456                 encoder_helper_funcs = encoder->helper_private;
 457                 if (!encoder || !encoder_helper_funcs->atomic_check)
 458                         return -ENXIO;
 459                 ret = encoder_helper_funcs->atomic_check(encoder, crtc->state,
 460                                                          conn_state);
 461                 if (ret)
 462                         return ret;
 463                 funcs->enable(crtc);
 464         }
 465
 466         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 467         if (IS_ERR(primary_state))
 468                 return PTR_ERR(primary_state);
 469
 470         crtc_state->plane_mask = 1 << drm_plane_index(crtc->primary);
 471         *plane_mask |= crtc_state->plane_mask;
 472
 473         drm_atomic_set_fb_for_plane(primary_state, set->fb);
 474         drm_framebuffer_unreference(set->fb);
 475         ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
 476
 477         if (set->ymirror)
 478                 /*
 479                  * TODO:
 480                  * some vop maybe not support ymirror, but force use it now.
 481                  */
 482                 drm_atomic_plane_set_property(crtc->primary, primary_state,
 483                                               mode_config->rotation_property,
 484                                               BIT(DRM_REFLECT_Y));
 485
 486         return ret;
 487 }
 488
 489 static void show_loader_logo(struct drm_device *drm_dev)
 490 {
 491         struct drm_atomic_state *state;
 492         struct device_node *np = drm_dev->dev->of_node;
 493         struct drm_mode_config *mode_config = &drm_dev->mode_config;
 494         struct device_node *root, *route;
 495         struct rockchip_drm_mode_set *set, *tmp;
 496         struct list_head mode_set_list;
 497         unsigned plane_mask = 0;
 498         int ret;
 499
 500         root = of_get_child_by_name(np, "route");
 501         if (!root) {
 502                 dev_warn(drm_dev->dev, "failed to parse display resources\n");
 503                 return;
 504         }
 505
 506         if (init_loader_memory(drm_dev)) {
 507                 dev_warn(drm_dev->dev, "failed to parse loader memory\n");
 508                 return;
 509         }
 510
 511         INIT_LIST_HEAD(&mode_set_list);
 512         drm_modeset_lock_all(drm_dev);
 513         state = drm_atomic_state_alloc(drm_dev);
 514         if (!state) {
 515                 dev_err(drm_dev->dev, "failed to alloc atomic state\n");
 516                 ret = -ENOMEM;
 517                 goto err_unlock;
 518         }
 519
 520         state->acquire_ctx = mode_config->acquire_ctx;
 521
 522         for_each_child_of_node(root, route) {
 523                 if (!of_device_is_available(route))
 524                         continue;
 525
 526                 set = of_parse_display_resource(drm_dev, route);
 527                 if (!set)
 528                         continue;
 529
 530                 if (setup_initial_state(drm_dev, state, set)) {
 531                         drm_framebuffer_unreference(set->fb);
 532                         kfree(set);
 533                         continue;
 534                 }
 535                 INIT_LIST_HEAD(&set->head);
 536                 list_add_tail(&set->head, &mode_set_list);
 537         }
 538
 539         if (list_empty(&mode_set_list)) {
 540                 dev_warn(drm_dev->dev, "can't not find any loader display\n");
 541                 ret = -ENXIO;
 542                 goto err_free_state;
 543         }
 544
 545         /*
 546          * The state save initial devices status, swap the state into
 547          * drm deivces as old state, so if new state come, can compare
 548          * with this state to judge which status need to update.
 549          */
 550         drm_atomic_helper_swap_state(drm_dev, state);
 551         drm_atomic_state_free(state);
 552         state = drm_atomic_helper_duplicate_state(drm_dev,
 553                                                   mode_config->acquire_ctx);
 554         if (IS_ERR(state)) {
 555                 dev_err(drm_dev->dev, "failed to duplicate atomic state\n");
 556                 ret = PTR_ERR_OR_ZERO(state);
 557                 goto err_unlock;
 558         }
 559         state->acquire_ctx = mode_config->acquire_ctx;
 560         list_for_each_entry(set, &mode_set_list, head)
 561                 /*
 562                  * We don't want to see any fail on update_state.
 563                  */
 564                 WARN_ON(update_state(drm_dev, state, set, &plane_mask));
 565
 566         ret = drm_atomic_commit(state);
 567         drm_atomic_clean_old_fb(drm_dev, plane_mask, ret);
 568
 569         list_for_each_entry_safe(set, tmp, &mode_set_list, head) {
 570                 struct drm_crtc *crtc = set->crtc;
 571
 572                 list_del(&set->head);
 573                 kfree(set);
 574
 575                 /* FIXME:
 576                  * primary plane state rotation is not BIT(0), but we only want
 577                  * it effect on logo display, userspace may not known to clean
 578                  * this property, would get unexpect display, so force set
 579                  * primary rotation to BIT(0).
 580                  */
 581                 if (!crtc->primary || !crtc->primary->state)
 582                         continue;
 583
 584                 drm_atomic_plane_set_property(crtc->primary,
 585                                               crtc->primary->state,
 586                                               mode_config->rotation_property,
 587                                               BIT(0));
 588         }
 589
 590         /*
 591          * Is possible get deadlock here?
 592          */
 593         WARN_ON(ret == -EDEADLK);
 594
 595         if (ret)
 596                 goto err_free_state;
 597
 598         drm_modeset_unlock_all(drm_dev);
 599         return;
 600
 601 err_free_state:
 602         drm_atomic_state_free(state);
 603 err_unlock:
 604         drm_modeset_unlock_all(drm_dev);
 605         if (ret)
 606                 dev_err(drm_dev->dev, "failed to show loader logo\n");
 607 }
 608
 609 /*
 610  * Attach a (component) device to the shared drm dma mapping from master drm
 611  * device.  This is used by the VOPs to map GEM buffers to a common DMA
 612  * mapping.
 613  */
 614 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
 615                                    struct device *dev)
 616 {
 617         struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
 618         int ret;
 619
 620         ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
 621         if (ret)
 622                 return ret;
 623
 624         dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
 625
 626         return arm_iommu_attach_device(dev, mapping);
 627 }
 628
 629 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
 630                                     struct device *dev)
 631 {
 632         arm_iommu_detach_device(dev);
 633 }
 634
 635 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
 636                                  const struct rockchip_crtc_funcs *crtc_funcs)
 637 {
 638         int pipe = drm_crtc_index(crtc);
 639         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 640
 641         if (pipe > ROCKCHIP_MAX_CRTC)
 642                 return -EINVAL;
 643
 644         priv->crtc_funcs[pipe] = crtc_funcs;
 645
 646         return 0;
 647 }
 648
 649 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
 650 {
 651         int pipe = drm_crtc_index(crtc);
 652         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 653
 654         if (pipe > ROCKCHIP_MAX_CRTC)
 655                 return;
 656
 657         priv->crtc_funcs[pipe] = NULL;
 658 }
 659
 660 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
 661                                                 int pipe)
 662 {
 663         struct drm_crtc *crtc;
 664         int i = 0;
 665
 666         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 667                 if (i++ == pipe)
 668                         return crtc;
 669
 670         return NULL;
 671 }
 672
 673 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
 674                                            unsigned int pipe)
 675 {
 676         struct rockchip_drm_private *priv = dev->dev_private;
 677         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 678
 679         if (crtc && priv->crtc_funcs[pipe] &&
 680             priv->crtc_funcs[pipe]->enable_vblank)
 681                 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
 682
 683         return 0;
 684 }
 685
 686 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
 687                                              unsigned int pipe)
 688 {
 689         struct rockchip_drm_private *priv = dev->dev_private;
 690         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 691
 692         if (crtc && priv->crtc_funcs[pipe] &&
 693             priv->crtc_funcs[pipe]->enable_vblank)
 694                 priv->crtc_funcs[pipe]->disable_vblank(crtc);
 695 }
 696
 697 static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
 698 {
 699         struct rockchip_drm_private *private;
 700         struct dma_iommu_mapping *mapping;
 701         struct device *dev = drm_dev->dev;
 702         struct drm_connector *connector;
 703         int ret;
 704
 705         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 706         if (!private)
 707                 return -ENOMEM;
 708
 709         mutex_init(&private->commit.lock);
 710         INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
 711
 712         drm_dev->dev_private = private;
 713
 714 #ifdef CONFIG_DRM_DMA_SYNC
 715         private->cpu_fence_context = fence_context_alloc(1);
 716         atomic_set(&private->cpu_fence_seqno, 0);
 717 #endif
 718
 719         drm_mode_config_init(drm_dev);
 720
 721         rockchip_drm_mode_config_init(drm_dev);
 722
 723         dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
 724                                       GFP_KERNEL);
 725         if (!dev->dma_parms) {
 726                 ret = -ENOMEM;
 727                 goto err_config_cleanup;
 728         }
 729
 730         /* TODO(djkurtz): fetch the mapping start/size from somewhere */
 731         mapping = arm_iommu_create_mapping(&platform_bus_type, 0x00000000,
 732                                            SZ_2G);
 733         if (IS_ERR(mapping)) {
 734                 ret = PTR_ERR(mapping);
 735                 goto err_config_cleanup;
 736         }
 737
 738         ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
 739         if (ret)
 740                 goto err_release_mapping;
 741
 742         dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
 743
 744         ret = arm_iommu_attach_device(dev, mapping);
 745         if (ret)
 746                 goto err_release_mapping;
 747
 748         /* Try to bind all sub drivers. */
 749         ret = component_bind_all(dev, drm_dev);
 750         if (ret)
 751                 goto err_detach_device;
 752
 753         /*
 754          * All components are now added, we can publish the connector sysfs
 755          * entries to userspace.  This will generate hotplug events and so
 756          * userspace will expect to be able to access DRM at this point.
 757          */
 758         list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
 759                         head) {
 760                 ret = drm_connector_register(connector);
 761                 if (ret) {
 762                         dev_err(drm_dev->dev,
 763                                 "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
 764                                 connector->base.id,
 765                                 connector->name, ret);
 766                         goto err_unbind;
 767                 }
 768         }
 769
 770         /* init kms poll for handling hpd */
 771         drm_kms_helper_poll_init(drm_dev);
 772
 773         /*
 774          * enable drm irq mode.
 775          * - with irq_enabled = true, we can use the vblank feature.
 776          */
 777         drm_dev->irq_enabled = true;
 778
 779         ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
 780         if (ret)
 781                 goto err_kms_helper_poll_fini;
 782
 783         /*
 784          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 785          * by drm timer once a current process gives up ownership of
 786          * vblank event.(after drm_vblank_put function is called)
 787          */
 788         drm_dev->vblank_disable_allowed = true;
 789
 790         drm_mode_config_reset(drm_dev);
 791
 792         show_loader_logo(drm_dev);
 793
 794         ret = rockchip_drm_fbdev_init(drm_dev);
 795         if (ret)
 796                 goto err_vblank_cleanup;
 797
 798         drm_dev->mode_config.allow_fb_modifiers = true;
 799
 800         return 0;
 801 err_vblank_cleanup:
 802         drm_vblank_cleanup(drm_dev);
 803 err_kms_helper_poll_fini:
 804         drm_kms_helper_poll_fini(drm_dev);
 805 err_unbind:
 806         component_unbind_all(dev, drm_dev);
 807 err_detach_device:
 808         arm_iommu_detach_device(dev);
 809 err_release_mapping:
 810         arm_iommu_release_mapping(dev->archdata.mapping);
 811 err_config_cleanup:
 812         drm_mode_config_cleanup(drm_dev);
 813         drm_dev->dev_private = NULL;
 814         return ret;
 815 }
 816
 817 static int rockchip_drm_unload(struct drm_device *drm_dev)
 818 {
 819         struct device *dev = drm_dev->dev;
 820
 821         rockchip_drm_fbdev_fini(drm_dev);
 822         drm_vblank_cleanup(drm_dev);
 823         drm_kms_helper_poll_fini(drm_dev);
 824         component_unbind_all(dev, drm_dev);
 825         arm_iommu_detach_device(dev);
 826         arm_iommu_release_mapping(dev->archdata.mapping);
 827         drm_mode_config_cleanup(drm_dev);
 828         drm_dev->dev_private = NULL;
 829
 830         return 0;
 831 }
 832
 833 static void rockchip_drm_crtc_cancel_pending_vblank(struct drm_crtc *crtc,
 834                                                     struct drm_file *file_priv)
 835 {
 836         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 837         int pipe = drm_crtc_index(crtc);
 838
 839         if (pipe < ROCKCHIP_MAX_CRTC &&
 840             priv->crtc_funcs[pipe] &&
 841             priv->crtc_funcs[pipe]->cancel_pending_vblank)
 842                 priv->crtc_funcs[pipe]->cancel_pending_vblank(crtc, file_priv);
 843 }
 844
 845 int rockchip_drm_register_subdrv(struct drm_rockchip_subdrv *subdrv)
 846 {
 847         if (!subdrv)
 848                 return -EINVAL;
 849
 850         mutex_lock(&subdrv_list_mutex);
 851         list_add_tail(&subdrv->list, &rockchip_drm_subdrv_list);
 852         mutex_unlock(&subdrv_list_mutex);
 853
 854         return 0;
 855 }
 856 EXPORT_SYMBOL_GPL(rockchip_drm_register_subdrv);
 857
 858 int rockchip_drm_unregister_subdrv(struct drm_rockchip_subdrv *subdrv)
 859 {
 860         if (!subdrv)
 861                 return -EINVAL;
 862
 863         mutex_lock(&subdrv_list_mutex);
 864         list_del(&subdrv->list);
 865         mutex_unlock(&subdrv_list_mutex);
 866
 867         return 0;
 868 }
 869 EXPORT_SYMBOL_GPL(rockchip_drm_unregister_subdrv);
 870
 871 static int rockchip_drm_open(struct drm_device *dev, struct drm_file *file)
 872 {
 873         struct rockchip_drm_file_private *file_priv;
 874         struct drm_rockchip_subdrv *subdrv;
 875         int ret = 0;
 876
 877         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
 878         if (!file_priv)
 879                 return -ENOMEM;
 880         INIT_LIST_HEAD(&file_priv->gem_cpu_acquire_list);
 881
 882         file->driver_priv = file_priv;
 883
 884         mutex_lock(&subdrv_list_mutex);
 885         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list) {
 886                 ret = subdrv->open(dev, subdrv->dev, file);
 887                 if (ret) {
 888                         mutex_unlock(&subdrv_list_mutex);
 889                         goto err_free_file_priv;
 890                 }
 891         }
 892         mutex_unlock(&subdrv_list_mutex);
 893
 894         return 0;
 895
 896 err_free_file_priv:
 897         kfree(file_priv);
 898         file_priv = NULL;
 899
 900         return ret;
 901 }
 902
 903 static void rockchip_drm_preclose(struct drm_device *dev,
 904                                   struct drm_file *file_priv)
 905 {
 906         struct rockchip_drm_file_private *file_private = file_priv->driver_priv;
 907         struct rockchip_gem_object_node *cur, *d;
 908         struct drm_rockchip_subdrv *subdrv;
 909         struct drm_crtc *crtc;
 910
 911         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 912                 rockchip_drm_crtc_cancel_pending_vblank(crtc, file_priv);
 913
 914         mutex_lock(&dev->struct_mutex);
 915         list_for_each_entry_safe(cur, d,
 916                         &file_private->gem_cpu_acquire_list, list) {
 917 #ifdef CONFIG_DRM_DMA_SYNC
 918                 BUG_ON(!cur->rockchip_gem_obj->acquire_fence);
 919                 drm_fence_signal_and_put(&cur->rockchip_gem_obj->acquire_fence);
 920 #endif
 921                 drm_gem_object_unreference(&cur->rockchip_gem_obj->base);
 922                 kfree(cur);
 923         }
 924         /* since we are deleting the whole list, just initialize the header
 925          * instead of calling list_del for every element
 926          */
 927         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
 928         mutex_unlock(&dev->struct_mutex);
 929
 930         mutex_lock(&subdrv_list_mutex);
 931         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list)
 932                 subdrv->close(dev, subdrv->dev, file_priv);
 933         mutex_unlock(&subdrv_list_mutex);
 934 }
 935
 936 static void rockchip_drm_postclose(struct drm_device *dev, struct drm_file *file)
 937 {
 938         kfree(file->driver_priv);
 939         file->driver_priv = NULL;
 940 }
 941
 942 void rockchip_drm_lastclose(struct drm_device *dev)
 943 {
 944         struct rockchip_drm_private *priv = dev->dev_private;
 945
 946         drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev_helper);
 947 }
 948
 949 static const struct drm_ioctl_desc rockchip_ioctls[] = {
 950         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CREATE, rockchip_gem_create_ioctl,
 951                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 952         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_MAP_OFFSET,
 953                           rockchip_gem_map_offset_ioctl,
 954                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 955         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_ACQUIRE,
 956                           rockchip_gem_cpu_acquire_ioctl,
 957                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 958         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_RELEASE,
 959                           rockchip_gem_cpu_release_ioctl,
 960                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 961         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_GET_VER, rockchip_rga_get_ver_ioctl,
 962                           DRM_AUTH | DRM_RENDER_ALLOW),
 963         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_SET_CMDLIST,
 964                           rockchip_rga_set_cmdlist_ioctl,
 965                           DRM_AUTH | DRM_RENDER_ALLOW),
 966         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_EXEC, rockchip_rga_exec_ioctl,
 967                           DRM_AUTH | DRM_RENDER_ALLOW),
 968 };
 969
 970 static const struct file_operations rockchip_drm_driver_fops = {
 971         .owner = THIS_MODULE,
 972         .open = drm_open,
 973         .mmap = rockchip_gem_mmap,
 974         .poll = drm_poll,
 975         .read = drm_read,
 976         .unlocked_ioctl = drm_ioctl,
 977 #ifdef CONFIG_COMPAT
 978         .compat_ioctl = drm_compat_ioctl,
 979 #endif
 980         .release = drm_release,
 981 };
 982
 983 const struct vm_operations_struct rockchip_drm_vm_ops = {
 984         .open = drm_gem_vm_open,
 985         .close = drm_gem_vm_close,
 986 };
 987
 988 static struct drm_driver rockchip_drm_driver = {
 989         .driver_features        = DRIVER_MODESET | DRIVER_GEM |
 990                                   DRIVER_PRIME | DRIVER_ATOMIC |
 991                                   DRIVER_RENDER,
 992         .load                   = rockchip_drm_load,
 993         .unload                 = rockchip_drm_unload,
 994         .preclose               = rockchip_drm_preclose,
 995         .lastclose              = rockchip_drm_lastclose,
 996         .get_vblank_counter     = drm_vblank_no_hw_counter,
 997         .open                   = rockchip_drm_open,
 998         .postclose              = rockchip_drm_postclose,
 999         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
1000         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
1001         .gem_vm_ops             = &rockchip_drm_vm_ops,
1002         .gem_free_object        = rockchip_gem_free_object,
1003         .dumb_create            = rockchip_gem_dumb_create,
1004         .dumb_map_offset        = rockchip_gem_dumb_map_offset,
1005         .dumb_destroy           = drm_gem_dumb_destroy,
1006         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
1007         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
1008         .gem_prime_import       = drm_gem_prime_import,
1009         .gem_prime_export       = drm_gem_prime_export,
1010         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
1011         .gem_prime_import_sg_table      = rockchip_gem_prime_import_sg_table,
1012         .gem_prime_vmap         = rockchip_gem_prime_vmap,
1013         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
1014         .gem_prime_mmap         = rockchip_gem_mmap_buf,
1015         .ioctls                 = rockchip_ioctls,
1016         .num_ioctls             = ARRAY_SIZE(rockchip_ioctls),
1017         .fops                   = &rockchip_drm_driver_fops,
1018         .name   = DRIVER_NAME,
1019         .desc   = DRIVER_DESC,
1020         .date   = DRIVER_DATE,
1021         .major  = DRIVER_MAJOR,
1022         .minor  = DRIVER_MINOR,
1023 };
1024
1025 #ifdef CONFIG_PM_SLEEP
1026 void rockchip_drm_fb_suspend(struct drm_device *drm)
1027 {
1028         struct rockchip_drm_private *priv = drm->dev_private;
1029
1030         console_lock();
1031         drm_fb_helper_set_suspend(priv->fbdev_helper, 1);
1032         console_unlock();
1033 }
1034
1035 void rockchip_drm_fb_resume(struct drm_device *drm)
1036 {
1037         struct rockchip_drm_private *priv = drm->dev_private;
1038
1039         console_lock();
1040         drm_fb_helper_set_suspend(priv->fbdev_helper, 0);
1041         console_unlock();
1042 }
1043
1044 static int rockchip_drm_sys_suspend(struct device *dev)
1045 {
1046         struct drm_device *drm = dev_get_drvdata(dev);
1047         struct rockchip_drm_private *priv = drm->dev_private;
1048
1049         drm_kms_helper_poll_disable(drm);
1050         rockchip_drm_fb_suspend(drm);
1051
1052         priv->state = drm_atomic_helper_suspend(drm);
1053         if (IS_ERR(priv->state)) {
1054                 rockchip_drm_fb_resume(drm);
1055                 drm_kms_helper_poll_enable(drm);
1056                 return PTR_ERR(priv->state);
1057         }
1058
1059         return 0;
1060 }
1061
1062 static int rockchip_drm_sys_resume(struct device *dev)
1063 {
1064         struct drm_device *drm = dev_get_drvdata(dev);
1065         struct rockchip_drm_private *priv = drm->dev_private;
1066
1067         drm_atomic_helper_resume(drm, priv->state);
1068         rockchip_drm_fb_resume(drm);
1069         drm_kms_helper_poll_enable(drm);
1070
1071         return 0;
1072 }
1073 #endif
1074
1075 static const struct dev_pm_ops rockchip_drm_pm_ops = {
1076         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
1077                                 rockchip_drm_sys_resume)
1078 };
1079
1080 static int compare_of(struct device *dev, void *data)
1081 {
1082         struct device_node *np = data;
1083
1084         return dev->of_node == np;
1085 }
1086
1087 static void rockchip_add_endpoints(struct device *dev,
1088                                    struct component_match **match,
1089                                    struct device_node *port)
1090 {
1091         struct device_node *ep, *remote;
1092
1093         for_each_child_of_node(port, ep) {
1094                 remote = of_graph_get_remote_port_parent(ep);
1095                 if (!remote || !of_device_is_available(remote)) {
1096                         of_node_put(remote);
1097                         continue;
1098                 } else if (!of_device_is_available(remote->parent)) {
1099                         dev_warn(dev, "parent device of %s is not available\n",
1100                                  remote->full_name);
1101                         of_node_put(remote);
1102                         continue;
1103                 }
1104
1105                 component_match_add(dev, match, compare_of, remote);
1106                 of_node_put(remote);
1107         }
1108 }
1109
1110 static int rockchip_drm_bind(struct device *dev)
1111 {
1112         struct drm_device *drm;
1113         int ret;
1114
1115         drm = drm_dev_alloc(&rockchip_drm_driver, dev);
1116         if (!drm)
1117                 return -ENOMEM;
1118
1119         ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
1120         if (ret)
1121                 goto err_free;
1122
1123         ret = drm_dev_register(drm, 0);
1124         if (ret)
1125                 goto err_free;
1126
1127         dev_set_drvdata(dev, drm);
1128
1129         return 0;
1130
1131 err_free:
1132         drm_dev_unref(drm);
1133         return ret;
1134 }
1135
1136 static void rockchip_drm_unbind(struct device *dev)
1137 {
1138         struct drm_device *drm = dev_get_drvdata(dev);
1139
1140         drm_dev_unregister(drm);
1141         drm_dev_unref(drm);
1142         dev_set_drvdata(dev, NULL);
1143 }
1144
1145 static const struct component_master_ops rockchip_drm_ops = {
1146         .bind = rockchip_drm_bind,
1147         .unbind = rockchip_drm_unbind,
1148 };
1149
1150 static int rockchip_drm_platform_probe(struct platform_device *pdev)
1151 {
1152         struct device *dev = &pdev->dev;
1153         struct component_match *match = NULL;
1154         struct device_node *np = dev->of_node;
1155         struct device_node *port;
1156         int i;
1157
1158         if (!np)
1159                 return -ENODEV;
1160         /*
1161          * Bind the crtc ports first, so that
1162          * drm_of_find_possible_crtcs called from encoder .bind callbacks
1163          * works as expected.
1164          */
1165         for (i = 0;; i++) {
1166                 port = of_parse_phandle(np, "ports", i);
1167                 if (!port)
1168                         break;
1169
1170                 if (!of_device_is_available(port->parent)) {
1171                         of_node_put(port);
1172                         continue;
1173                 }
1174
1175                 component_match_add(dev, &match, compare_of, port->parent);
1176                 of_node_put(port);
1177         }
1178
1179         if (i == 0) {
1180                 dev_err(dev, "missing 'ports' property\n");
1181                 return -ENODEV;
1182         }
1183
1184         if (!match) {
1185                 dev_err(dev, "No available vop found for display-subsystem.\n");
1186                 return -ENODEV;
1187         }
1188         /*
1189          * For each bound crtc, bind the encoders attached to its
1190          * remote endpoint.
1191          */
1192         for (i = 0;; i++) {
1193                 port = of_parse_phandle(np, "ports", i);
1194                 if (!port)
1195                         break;
1196
1197                 if (!of_device_is_available(port->parent)) {
1198                         of_node_put(port);
1199                         continue;
1200                 }
1201
1202                 rockchip_add_endpoints(dev, &match, port);
1203                 of_node_put(port);
1204         }
1205
1206         return component_master_add_with_match(dev, &rockchip_drm_ops, match);
1207 }
1208
1209 static int rockchip_drm_platform_remove(struct platform_device *pdev)
1210 {
1211         component_master_del(&pdev->dev, &rockchip_drm_ops);
1212
1213         return 0;
1214 }
1215
1216 static const struct of_device_id rockchip_drm_dt_ids[] = {
1217         { .compatible = "rockchip,display-subsystem", },
1218         { /* sentinel */ },
1219 };
1220 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
1221
1222 static struct platform_driver rockchip_drm_platform_driver = {
1223         .probe = rockchip_drm_platform_probe,
1224         .remove = rockchip_drm_platform_remove,
1225         .driver = {
1226                 .name = "rockchip-drm",
1227                 .of_match_table = rockchip_drm_dt_ids,
1228                 .pm = &rockchip_drm_pm_ops,
1229         },
1230 };
1231
1232 module_platform_driver(rockchip_drm_platform_driver);
1233
1234 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
1235 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
1236 MODULE_LICENSE("GPL v2");