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                 const struct drm_encoder_helper_funcs *encoder_helper_funcs;
 427                 const struct drm_connector_helper_funcs *connector_helper_funcs;
 428                 struct drm_encoder *encoder;
 429
 430                 funcs = crtc->helper_private;
 431                 connector_helper_funcs = connector->helper_private;
 432                 if (!funcs || !funcs->enable ||
 433                     !connector_helper_funcs ||
 434                     !connector_helper_funcs->best_encoder)
 435                         return -ENXIO;
 436                 encoder = connector_helper_funcs->best_encoder(connector);
 437                 encoder_helper_funcs = encoder->helper_private;
 438                 if (!encoder || !encoder_helper_funcs->atomic_check)
 439                         return -ENXIO;
 440                 ret = encoder_helper_funcs->atomic_check(encoder, crtc->state,
 441                                                          conn_state);
 442                 if (ret)
 443                         return ret;
 444                 funcs->enable(crtc);
 445         }
 446
 447         primary_state = drm_atomic_get_plane_state(state, crtc->primary);
 448         if (IS_ERR(primary_state))
 449                 return PTR_ERR(primary_state);
 450
 451         crtc_state->plane_mask = 1 << drm_plane_index(crtc->primary);
 452         *plane_mask |= crtc_state->plane_mask;
 453
 454         drm_atomic_set_fb_for_plane(primary_state, set->fb);
 455         drm_framebuffer_unreference(set->fb);
 456         ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
 457
 458         if (set->ymirror)
 459                 /*
 460                  * TODO:
 461                  * some vop maybe not support ymirror, but force use it now.
 462                  */
 463                 drm_atomic_plane_set_property(crtc->primary, primary_state,
 464                                               mode_config->rotation_property,
 465                                               BIT(DRM_REFLECT_Y));
 466
 467         return ret;
 468 }
 469
 470 static void show_loader_logo(struct drm_device *drm_dev)
 471 {
 472         struct drm_atomic_state *state;
 473         struct device_node *np = drm_dev->dev->of_node;
 474         struct drm_mode_config *mode_config = &drm_dev->mode_config;
 475         struct device_node *root, *route;
 476         struct rockchip_drm_mode_set *set, *tmp;
 477         struct list_head mode_set_list;
 478         unsigned plane_mask = 0;
 479         int ret;
 480
 481         root = of_get_child_by_name(np, "route");
 482         if (!root) {
 483                 dev_warn(drm_dev->dev, "failed to parse display resources\n");
 484                 return;
 485         }
 486
 487         if (init_loader_memory(drm_dev)) {
 488                 dev_warn(drm_dev->dev, "failed to parse loader memory\n");
 489                 return;
 490         }
 491
 492         INIT_LIST_HEAD(&mode_set_list);
 493         drm_modeset_lock_all(drm_dev);
 494         state = drm_atomic_state_alloc(drm_dev);
 495         if (!state) {
 496                 dev_err(drm_dev->dev, "failed to alloc atomic state\n");
 497                 ret = -ENOMEM;
 498                 goto err_unlock;
 499         }
 500
 501         state->acquire_ctx = mode_config->acquire_ctx;
 502
 503         for_each_child_of_node(root, route) {
 504                 set = of_parse_display_resource(drm_dev, route);
 505                 if (!set)
 506                         continue;
 507
 508                 if (setup_initial_state(drm_dev, state, set)) {
 509                         drm_framebuffer_unreference(set->fb);
 510                         kfree(set);
 511                         continue;
 512                 }
 513                 INIT_LIST_HEAD(&set->head);
 514                 list_add_tail(&set->head, &mode_set_list);
 515         }
 516
 517         if (list_empty(&mode_set_list)) {
 518                 dev_warn(drm_dev->dev, "can't not find any loader display\n");
 519                 ret = -ENXIO;
 520                 goto err_free_state;
 521         }
 522
 523         /*
 524          * The state save initial devices status, swap the state into
 525          * drm deivces as old state, so if new state come, can compare
 526          * with this state to judge which status need to update.
 527          */
 528         drm_atomic_helper_swap_state(drm_dev, state);
 529         drm_atomic_state_free(state);
 530         state = drm_atomic_helper_duplicate_state(drm_dev,
 531                                                   mode_config->acquire_ctx);
 532         if (IS_ERR(state)) {
 533                 dev_err(drm_dev->dev, "failed to duplicate atomic state\n");
 534                 ret = PTR_ERR_OR_ZERO(state);
 535                 goto err_unlock;
 536         }
 537         state->acquire_ctx = mode_config->acquire_ctx;
 538         list_for_each_entry(set, &mode_set_list, head)
 539                 /*
 540                  * We don't want to see any fail on update_state.
 541                  */
 542                 WARN_ON(update_state(drm_dev, state, set, &plane_mask));
 543
 544         ret = drm_atomic_commit(state);
 545         drm_atomic_clean_old_fb(drm_dev, plane_mask, ret);
 546
 547         list_for_each_entry_safe(set, tmp, &mode_set_list, head) {
 548                 struct drm_crtc *crtc = set->crtc;
 549
 550                 list_del(&set->head);
 551                 kfree(set);
 552
 553                 /* FIXME:
 554                  * primary plane state rotation is not BIT(0), but we only want
 555                  * it effect on logo display, userspace may not known to clean
 556                  * this property, would get unexpect display, so force set
 557                  * primary rotation to BIT(0).
 558                  */
 559                 if (!crtc->primary || !crtc->primary->state)
 560                         continue;
 561
 562                 drm_atomic_plane_set_property(crtc->primary,
 563                                               crtc->primary->state,
 564                                               mode_config->rotation_property,
 565                                               BIT(0));
 566         }
 567
 568         /*
 569          * Is possible get deadlock here?
 570          */
 571         WARN_ON(ret == -EDEADLK);
 572
 573         if (ret)
 574                 goto err_free_state;
 575
 576         drm_modeset_unlock_all(drm_dev);
 577         return;
 578
 579 err_free_state:
 580         drm_atomic_state_free(state);
 581 err_unlock:
 582         drm_modeset_unlock_all(drm_dev);
 583         if (ret)
 584                 dev_err(drm_dev->dev, "failed to show loader logo\n");
 585 }
 586
 587 /*
 588  * Attach a (component) device to the shared drm dma mapping from master drm
 589  * device.  This is used by the VOPs to map GEM buffers to a common DMA
 590  * mapping.
 591  */
 592 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
 593                                    struct device *dev)
 594 {
 595         struct rockchip_drm_private *private = drm_dev->dev_private;
 596         struct iommu_domain *domain = private->domain;
 597         int ret;
 598
 599         ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
 600         if (ret)
 601                 return ret;
 602
 603         dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
 604         ret = iommu_attach_device(domain, dev);
 605         if (ret) {
 606                 dev_err(dev, "Failed to attach iommu device\n");
 607                 return ret;
 608         }
 609
 610         if (!common_iommu_setup_dma_ops(dev, 0x10000000, SZ_2G, domain->ops)) {
 611                 dev_err(dev, "Failed to set dma_ops\n");
 612                 iommu_detach_device(domain, dev);
 613                 ret = -ENODEV;
 614         }
 615
 616         return ret;
 617 }
 618
 619 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
 620                                     struct device *dev)
 621 {
 622         struct rockchip_drm_private *private = drm_dev->dev_private;
 623         struct iommu_domain *domain = private->domain;
 624
 625         iommu_detach_device(domain, dev);
 626 }
 627
 628 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
 629                                  const struct rockchip_crtc_funcs *crtc_funcs)
 630 {
 631         int pipe = drm_crtc_index(crtc);
 632         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 633
 634         if (pipe > ROCKCHIP_MAX_CRTC)
 635                 return -EINVAL;
 636
 637         priv->crtc_funcs[pipe] = crtc_funcs;
 638
 639         return 0;
 640 }
 641
 642 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
 643 {
 644         int pipe = drm_crtc_index(crtc);
 645         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 646
 647         if (pipe > ROCKCHIP_MAX_CRTC)
 648                 return;
 649
 650         priv->crtc_funcs[pipe] = NULL;
 651 }
 652
 653 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
 654                                                 int pipe)
 655 {
 656         struct drm_crtc *crtc;
 657         int i = 0;
 658
 659         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 660                 if (i++ == pipe)
 661                         return crtc;
 662
 663         return NULL;
 664 }
 665
 666 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
 667                                            unsigned int pipe)
 668 {
 669         struct rockchip_drm_private *priv = dev->dev_private;
 670         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 671
 672         if (crtc && priv->crtc_funcs[pipe] &&
 673             priv->crtc_funcs[pipe]->enable_vblank)
 674                 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
 675
 676         return 0;
 677 }
 678
 679 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
 680                                              unsigned int pipe)
 681 {
 682         struct rockchip_drm_private *priv = dev->dev_private;
 683         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 684
 685         if (crtc && priv->crtc_funcs[pipe] &&
 686             priv->crtc_funcs[pipe]->enable_vblank)
 687                 priv->crtc_funcs[pipe]->disable_vblank(crtc);
 688 }
 689
 690 static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
 691 {
 692         struct rockchip_drm_private *private;
 693         struct device *dev = drm_dev->dev;
 694         struct drm_connector *connector;
 695         struct iommu_group *group;
 696         int ret;
 697
 698         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 699         if (!private)
 700                 return -ENOMEM;
 701
 702         mutex_init(&private->commit.lock);
 703         INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
 704
 705         drm_dev->dev_private = private;
 706
 707 #ifdef CONFIG_DRM_DMA_SYNC
 708         private->cpu_fence_context = fence_context_alloc(1);
 709         atomic_set(&private->cpu_fence_seqno, 0);
 710 #endif
 711
 712         drm_mode_config_init(drm_dev);
 713
 714         rockchip_drm_mode_config_init(drm_dev);
 715
 716         dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
 717                                       GFP_KERNEL);
 718         if (!dev->dma_parms) {
 719                 ret = -ENOMEM;
 720                 goto err_config_cleanup;
 721         }
 722
 723         private->domain = iommu_domain_alloc(&platform_bus_type);
 724         if (!private->domain)
 725                 return -ENOMEM;
 726
 727         ret = iommu_get_dma_cookie(private->domain);
 728         if (ret)
 729                 goto err_free_domain;
 730
 731         group = iommu_group_get(dev);
 732         if (!group) {
 733                 group = iommu_group_alloc();
 734                 if (IS_ERR(group)) {
 735                         dev_err(dev, "Failed to allocate IOMMU group\n");
 736                         goto err_put_cookie;
 737                 }
 738
 739                 ret = iommu_group_add_device(group, dev);
 740                 iommu_group_put(group);
 741                 if (ret) {
 742                         dev_err(dev, "failed to add device to IOMMU group\n");
 743                         goto err_put_cookie;
 744                 }
 745         }
 746         /*
 747          * Attach virtual iommu device, sub iommu device can share the same
 748          * mapping with it.
 749          */
 750         ret = rockchip_drm_dma_attach_device(drm_dev, dev);
 751         if (ret)
 752                 goto err_group_remove_device;
 753
 754         /* Try to bind all sub drivers. */
 755         ret = component_bind_all(dev, drm_dev);
 756         if (ret)
 757                 goto err_detach_device;
 758
 759         /*
 760          * All components are now added, we can publish the connector sysfs
 761          * entries to userspace.  This will generate hotplug events and so
 762          * userspace will expect to be able to access DRM at this point.
 763          */
 764         list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
 765                         head) {
 766                 ret = drm_connector_register(connector);
 767                 if (ret) {
 768                         dev_err(drm_dev->dev,
 769                                 "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
 770                                 connector->base.id,
 771                                 connector->name, ret);
 772                         goto err_unbind;
 773                 }
 774         }
 775
 776         /* init kms poll for handling hpd */
 777         drm_kms_helper_poll_init(drm_dev);
 778
 779         /*
 780          * enable drm irq mode.
 781          * - with irq_enabled = true, we can use the vblank feature.
 782          */
 783         drm_dev->irq_enabled = true;
 784
 785         ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
 786         if (ret)
 787                 goto err_kms_helper_poll_fini;
 788
 789         /*
 790          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 791          * by drm timer once a current process gives up ownership of
 792          * vblank event.(after drm_vblank_put function is called)
 793          */
 794         drm_dev->vblank_disable_allowed = true;
 795
 796         drm_mode_config_reset(drm_dev);
 797
 798         show_loader_logo(drm_dev);
 799
 800         ret = rockchip_drm_fbdev_init(drm_dev);
 801         if (ret)
 802                 goto err_vblank_cleanup;
 803
 804         drm_dev->mode_config.allow_fb_modifiers = true;
 805
 806         return 0;
 807 err_vblank_cleanup:
 808         drm_vblank_cleanup(drm_dev);
 809 err_kms_helper_poll_fini:
 810         drm_kms_helper_poll_fini(drm_dev);
 811 err_unbind:
 812         component_unbind_all(dev, drm_dev);
 813 err_detach_device:
 814         rockchip_drm_dma_detach_device(drm_dev, dev);
 815 err_group_remove_device:
 816         iommu_group_remove_device(dev);
 817 err_put_cookie:
 818         iommu_put_dma_cookie(private->domain);
 819 err_free_domain:
 820         iommu_domain_free(private->domain);
 821 err_config_cleanup:
 822         drm_mode_config_cleanup(drm_dev);
 823         drm_dev->dev_private = NULL;
 824         return ret;
 825 }
 826
 827 static int rockchip_drm_unload(struct drm_device *drm_dev)
 828 {
 829         struct device *dev = drm_dev->dev;
 830         struct rockchip_drm_private *private = drm_dev->dev_private;
 831
 832         rockchip_drm_fbdev_fini(drm_dev);
 833         drm_vblank_cleanup(drm_dev);
 834         drm_kms_helper_poll_fini(drm_dev);
 835         component_unbind_all(dev, drm_dev);
 836         rockchip_drm_dma_detach_device(drm_dev, dev);
 837         iommu_group_remove_device(dev);
 838         iommu_put_dma_cookie(private->domain);
 839         iommu_domain_free(private->domain);
 840         drm_mode_config_cleanup(drm_dev);
 841         drm_dev->dev_private = NULL;
 842
 843         return 0;
 844 }
 845
 846 static void rockchip_drm_crtc_cancel_pending_vblank(struct drm_crtc *crtc,
 847                                                     struct drm_file *file_priv)
 848 {
 849         struct rockchip_drm_private *priv = crtc->dev->dev_private;
 850         int pipe = drm_crtc_index(crtc);
 851
 852         if (pipe < ROCKCHIP_MAX_CRTC &&
 853             priv->crtc_funcs[pipe] &&
 854             priv->crtc_funcs[pipe]->cancel_pending_vblank)
 855                 priv->crtc_funcs[pipe]->cancel_pending_vblank(crtc, file_priv);
 856 }
 857
 858 int rockchip_drm_register_subdrv(struct drm_rockchip_subdrv *subdrv)
 859 {
 860         if (!subdrv)
 861                 return -EINVAL;
 862
 863         mutex_lock(&subdrv_list_mutex);
 864         list_add_tail(&subdrv->list, &rockchip_drm_subdrv_list);
 865         mutex_unlock(&subdrv_list_mutex);
 866
 867         return 0;
 868 }
 869 EXPORT_SYMBOL_GPL(rockchip_drm_register_subdrv);
 870
 871 int rockchip_drm_unregister_subdrv(struct drm_rockchip_subdrv *subdrv)
 872 {
 873         if (!subdrv)
 874                 return -EINVAL;
 875
 876         mutex_lock(&subdrv_list_mutex);
 877         list_del(&subdrv->list);
 878         mutex_unlock(&subdrv_list_mutex);
 879
 880         return 0;
 881 }
 882 EXPORT_SYMBOL_GPL(rockchip_drm_unregister_subdrv);
 883
 884 static int rockchip_drm_open(struct drm_device *dev, struct drm_file *file)
 885 {
 886         struct rockchip_drm_file_private *file_priv;
 887         struct drm_rockchip_subdrv *subdrv;
 888         int ret = 0;
 889
 890         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
 891         if (!file_priv)
 892                 return -ENOMEM;
 893         INIT_LIST_HEAD(&file_priv->gem_cpu_acquire_list);
 894
 895         file->driver_priv = file_priv;
 896
 897         mutex_lock(&subdrv_list_mutex);
 898         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list) {
 899                 ret = subdrv->open(dev, subdrv->dev, file);
 900                 if (ret) {
 901                         mutex_unlock(&subdrv_list_mutex);
 902                         goto err_free_file_priv;
 903                 }
 904         }
 905         mutex_unlock(&subdrv_list_mutex);
 906
 907         return 0;
 908
 909 err_free_file_priv:
 910         kfree(file_priv);
 911         file_priv = NULL;
 912
 913         return ret;
 914 }
 915
 916 static void rockchip_drm_preclose(struct drm_device *dev,
 917                                   struct drm_file *file_priv)
 918 {
 919         struct rockchip_drm_file_private *file_private = file_priv->driver_priv;
 920         struct rockchip_gem_object_node *cur, *d;
 921         struct drm_rockchip_subdrv *subdrv;
 922         struct drm_crtc *crtc;
 923
 924         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 925                 rockchip_drm_crtc_cancel_pending_vblank(crtc, file_priv);
 926
 927         mutex_lock(&dev->struct_mutex);
 928         list_for_each_entry_safe(cur, d,
 929                         &file_private->gem_cpu_acquire_list, list) {
 930 #ifdef CONFIG_DRM_DMA_SYNC
 931                 BUG_ON(!cur->rockchip_gem_obj->acquire_fence);
 932                 drm_fence_signal_and_put(&cur->rockchip_gem_obj->acquire_fence);
 933 #endif
 934                 drm_gem_object_unreference(&cur->rockchip_gem_obj->base);
 935                 kfree(cur);
 936         }
 937         /* since we are deleting the whole list, just initialize the header
 938          * instead of calling list_del for every element
 939          */
 940         INIT_LIST_HEAD(&file_private->gem_cpu_acquire_list);
 941         mutex_unlock(&dev->struct_mutex);
 942
 943         mutex_lock(&subdrv_list_mutex);
 944         list_for_each_entry(subdrv, &rockchip_drm_subdrv_list, list)
 945                 subdrv->close(dev, subdrv->dev, file_priv);
 946         mutex_unlock(&subdrv_list_mutex);
 947 }
 948
 949 static void rockchip_drm_postclose(struct drm_device *dev, struct drm_file *file)
 950 {
 951         kfree(file->driver_priv);
 952         file->driver_priv = NULL;
 953 }
 954
 955 void rockchip_drm_lastclose(struct drm_device *dev)
 956 {
 957         struct rockchip_drm_private *priv = dev->dev_private;
 958
 959         drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev_helper);
 960 }
 961
 962 static const struct drm_ioctl_desc rockchip_ioctls[] = {
 963         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CREATE, rockchip_gem_create_ioctl,
 964                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 965         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_MAP_OFFSET,
 966                           rockchip_gem_map_offset_ioctl,
 967                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 968         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_ACQUIRE,
 969                           rockchip_gem_cpu_acquire_ioctl,
 970                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 971         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CPU_RELEASE,
 972                           rockchip_gem_cpu_release_ioctl,
 973                           DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
 974         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_GET_VER, rockchip_rga_get_ver_ioctl,
 975                           DRM_AUTH | DRM_RENDER_ALLOW),
 976         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_SET_CMDLIST,
 977                           rockchip_rga_set_cmdlist_ioctl,
 978                           DRM_AUTH | DRM_RENDER_ALLOW),
 979         DRM_IOCTL_DEF_DRV(ROCKCHIP_RGA_EXEC, rockchip_rga_exec_ioctl,
 980                           DRM_AUTH | DRM_RENDER_ALLOW),
 981 };
 982
 983 static const struct file_operations rockchip_drm_driver_fops = {
 984         .owner = THIS_MODULE,
 985         .open = drm_open,
 986         .mmap = rockchip_gem_mmap,
 987         .poll = drm_poll,
 988         .read = drm_read,
 989         .unlocked_ioctl = drm_ioctl,
 990 #ifdef CONFIG_COMPAT
 991         .compat_ioctl = drm_compat_ioctl,
 992 #endif
 993         .release = drm_release,
 994 };
 995
 996 const struct vm_operations_struct rockchip_drm_vm_ops = {
 997         .open = drm_gem_vm_open,
 998         .close = drm_gem_vm_close,
 999 };
1000
1001 static struct drm_driver rockchip_drm_driver = {
1002         .driver_features        = DRIVER_MODESET | DRIVER_GEM |
1003                                   DRIVER_PRIME | DRIVER_ATOMIC |
1004                                   DRIVER_RENDER,
1005         .load                   = rockchip_drm_load,
1006         .unload                 = rockchip_drm_unload,
1007         .preclose               = rockchip_drm_preclose,
1008         .lastclose              = rockchip_drm_lastclose,
1009         .get_vblank_counter     = drm_vblank_no_hw_counter,
1010         .open                   = rockchip_drm_open,
1011         .postclose              = rockchip_drm_postclose,
1012         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
1013         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
1014         .gem_vm_ops             = &rockchip_drm_vm_ops,
1015         .gem_free_object        = rockchip_gem_free_object,
1016         .dumb_create            = rockchip_gem_dumb_create,
1017         .dumb_map_offset        = rockchip_gem_dumb_map_offset,
1018         .dumb_destroy           = drm_gem_dumb_destroy,
1019         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
1020         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
1021         .gem_prime_import       = drm_gem_prime_import,
1022         .gem_prime_import_sg_table = rockchip_gem_prime_import_sg_table,
1023         .gem_prime_export       = drm_gem_prime_export,
1024         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
1025         .gem_prime_vmap         = rockchip_gem_prime_vmap,
1026         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
1027         .gem_prime_mmap         = rockchip_gem_mmap_buf,
1028         .ioctls                 = rockchip_ioctls,
1029         .num_ioctls             = ARRAY_SIZE(rockchip_ioctls),
1030         .fops                   = &rockchip_drm_driver_fops,
1031         .name   = DRIVER_NAME,
1032         .desc   = DRIVER_DESC,
1033         .date   = DRIVER_DATE,
1034         .major  = DRIVER_MAJOR,
1035         .minor  = DRIVER_MINOR,
1036 };
1037
1038 #ifdef CONFIG_PM_SLEEP
1039 void rockchip_drm_fb_suspend(struct drm_device *drm)
1040 {
1041         struct rockchip_drm_private *priv = drm->dev_private;
1042
1043         console_lock();
1044         drm_fb_helper_set_suspend(priv->fbdev_helper, 1);
1045         console_unlock();
1046 }
1047
1048 void rockchip_drm_fb_resume(struct drm_device *drm)
1049 {
1050         struct rockchip_drm_private *priv = drm->dev_private;
1051
1052         console_lock();
1053         drm_fb_helper_set_suspend(priv->fbdev_helper, 0);
1054         console_unlock();
1055 }
1056
1057 static int rockchip_drm_sys_suspend(struct device *dev)
1058 {
1059         struct drm_device *drm = dev_get_drvdata(dev);
1060         struct rockchip_drm_private *priv = drm->dev_private;
1061
1062         drm_kms_helper_poll_disable(drm);
1063         rockchip_drm_fb_suspend(drm);
1064
1065         priv->state = drm_atomic_helper_suspend(drm);
1066         if (IS_ERR(priv->state)) {
1067                 rockchip_drm_fb_resume(drm);
1068                 drm_kms_helper_poll_enable(drm);
1069                 return PTR_ERR(priv->state);
1070         }
1071
1072         return 0;
1073 }
1074
1075 static int rockchip_drm_sys_resume(struct device *dev)
1076 {
1077         struct drm_device *drm = dev_get_drvdata(dev);
1078         struct rockchip_drm_private *priv = drm->dev_private;
1079
1080         drm_atomic_helper_resume(drm, priv->state);
1081         rockchip_drm_fb_resume(drm);
1082         drm_kms_helper_poll_enable(drm);
1083
1084         return 0;
1085 }
1086 #endif
1087
1088 static const struct dev_pm_ops rockchip_drm_pm_ops = {
1089         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
1090                                 rockchip_drm_sys_resume)
1091 };
1092
1093 static int compare_of(struct device *dev, void *data)
1094 {
1095         struct device_node *np = data;
1096
1097         return dev->of_node == np;
1098 }
1099
1100 static void rockchip_add_endpoints(struct device *dev,
1101                                    struct component_match **match,
1102                                    struct device_node *port)
1103 {
1104         struct device_node *ep, *remote;
1105
1106         for_each_child_of_node(port, ep) {
1107                 remote = of_graph_get_remote_port_parent(ep);
1108                 if (!remote || !of_device_is_available(remote)) {
1109                         of_node_put(remote);
1110                         continue;
1111                 } else if (!of_device_is_available(remote->parent)) {
1112                         dev_warn(dev, "parent device of %s is not available\n",
1113                                  remote->full_name);
1114                         of_node_put(remote);
1115                         continue;
1116                 }
1117
1118                 component_match_add(dev, match, compare_of, remote);
1119                 of_node_put(remote);
1120         }
1121 }
1122
1123 static int rockchip_drm_bind(struct device *dev)
1124 {
1125         struct drm_device *drm;
1126         int ret;
1127
1128         drm = drm_dev_alloc(&rockchip_drm_driver, dev);
1129         if (!drm)
1130                 return -ENOMEM;
1131
1132         ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
1133         if (ret)
1134                 goto err_free;
1135
1136         ret = drm_dev_register(drm, 0);
1137         if (ret)
1138                 goto err_free;
1139
1140         dev_set_drvdata(dev, drm);
1141
1142         return 0;
1143
1144 err_free:
1145         drm_dev_unref(drm);
1146         return ret;
1147 }
1148
1149 static void rockchip_drm_unbind(struct device *dev)
1150 {
1151         struct drm_device *drm = dev_get_drvdata(dev);
1152
1153         drm_dev_unregister(drm);
1154         drm_dev_unref(drm);
1155         dev_set_drvdata(dev, NULL);
1156 }
1157
1158 static const struct component_master_ops rockchip_drm_ops = {
1159         .bind = rockchip_drm_bind,
1160         .unbind = rockchip_drm_unbind,
1161 };
1162
1163 static int rockchip_drm_platform_probe(struct platform_device *pdev)
1164 {
1165         struct device *dev = &pdev->dev;
1166         struct component_match *match = NULL;
1167         struct device_node *np = dev->of_node;
1168         struct device_node *port;
1169         int i;
1170
1171         if (!np)
1172                 return -ENODEV;
1173         /*
1174          * Bind the crtc ports first, so that
1175          * drm_of_find_possible_crtcs called from encoder .bind callbacks
1176          * works as expected.
1177          */
1178         for (i = 0;; i++) {
1179                 port = of_parse_phandle(np, "ports", i);
1180                 if (!port)
1181                         break;
1182
1183                 if (!of_device_is_available(port->parent)) {
1184                         of_node_put(port);
1185                         continue;
1186                 }
1187
1188                 component_match_add(dev, &match, compare_of, port->parent);
1189                 of_node_put(port);
1190         }
1191
1192         if (i == 0) {
1193                 dev_err(dev, "missing 'ports' property\n");
1194                 return -ENODEV;
1195         }
1196
1197         if (!match) {
1198                 dev_err(dev, "No available vop found for display-subsystem.\n");
1199                 return -ENODEV;
1200         }
1201         /*
1202          * For each bound crtc, bind the encoders attached to its
1203          * remote endpoint.
1204          */
1205         for (i = 0;; i++) {
1206                 port = of_parse_phandle(np, "ports", i);
1207                 if (!port)
1208                         break;
1209
1210                 if (!of_device_is_available(port->parent)) {
1211                         of_node_put(port);
1212                         continue;
1213                 }
1214
1215                 rockchip_add_endpoints(dev, &match, port);
1216                 of_node_put(port);
1217         }
1218
1219         return component_master_add_with_match(dev, &rockchip_drm_ops, match);
1220 }
1221
1222 static int rockchip_drm_platform_remove(struct platform_device *pdev)
1223 {
1224         component_master_del(&pdev->dev, &rockchip_drm_ops);
1225
1226         return 0;
1227 }
1228
1229 static const struct of_device_id rockchip_drm_dt_ids[] = {
1230         { .compatible = "rockchip,display-subsystem", },
1231         { /* sentinel */ },
1232 };
1233 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
1234
1235 static struct platform_driver rockchip_drm_platform_driver = {
1236         .probe = rockchip_drm_platform_probe,
1237         .remove = rockchip_drm_platform_remove,
1238         .driver = {
1239                 .name = "rockchip-drm",
1240                 .of_match_table = rockchip_drm_dt_ids,
1241                 .pm = &rockchip_drm_pm_ops,
1242         },
1243 };
1244
1245 module_platform_driver(rockchip_drm_platform_driver);
1246
1247 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
1248 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
1249 MODULE_LICENSE("GPL v2");