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