drivers/gpu/drm/rockchip/rockchip_drm_drv.c

   1 /*
   2  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
   3  * Author:Mark Yao <mark.yao@rock-chips.com>
   4  *
   5  * based on exynos_drm_drv.c
   6  *
   7  * This software is licensed under the terms of the GNU General Public
   8  * License version 2, as published by the Free Software Foundation, and
   9  * may be copied, distributed, and modified under those terms.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <drm/drmP.h>
  18 #include <drm/drm_crtc_helper.h>
  19 #include <drm/drm_fb_helper.h>
  20 #include <drm/drm_gem_cma_helper.h>
  21 #include <drm/drm_of.h>
  22 #include <linux/dma-mapping.h>
  23 #include <linux/dma-iommu.h>
  24 #include <linux/pm_runtime.h>
  25 #include <linux/module.h>
  26 #include <linux/of_graph.h>
  27 #include <linux/component.h>
  28 #include <linux/console.h>
  29 #include <linux/iommu.h>
  30
  31 #include "rockchip_drm_drv.h"
  32 #include "rockchip_drm_fb.h"
  33 #include "rockchip_drm_fbdev.h"
  34 #include "rockchip_drm_gem.h"
  35
  36 #define DRIVER_NAME     "rockchip"
  37 #define DRIVER_DESC     "RockChip Soc DRM"
  38 #define DRIVER_DATE     "20140818"
  39 #define DRIVER_MAJOR    1
  40 #define DRIVER_MINOR    0
  41
  42 static bool is_support_iommu = true;
  43 static struct drm_driver rockchip_drm_driver;
  44
  45 /*
  46  * Attach a (component) device to the shared drm dma mapping from master drm
  47  * device.  This is used by the VOPs to map GEM buffers to a common DMA
  48  * mapping.
  49  */
  50 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
  51                                    struct device *dev)
  52 {
  53         struct rockchip_drm_private *private = drm_dev->dev_private;
  54         int ret;
  55
  56         if (!is_support_iommu)
  57                 return 0;
  58
  59         ret = iommu_attach_device(private->domain, dev);
  60         if (ret) {
  61                 DRM_DEV_ERROR(dev, "Failed to attach iommu device\n");
  62                 return ret;
  63         }
  64
  65         return 0;
  66 }
  67
  68 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
  69                                     struct device *dev)
  70 {
  71         struct rockchip_drm_private *private = drm_dev->dev_private;
  72         struct iommu_domain *domain = private->domain;
  73
  74         if (!is_support_iommu)
  75                 return;
  76
  77         iommu_detach_device(domain, dev);
  78 }
  79
  80 static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
  81 {
  82         struct rockchip_drm_private *private = drm_dev->dev_private;
  83         struct iommu_domain_geometry *geometry;
  84         u64 start, end;
  85
  86         if (!is_support_iommu)
  87                 return 0;
  88
  89         private->domain = iommu_domain_alloc(&platform_bus_type);
  90         if (!private->domain)
  91                 return -ENOMEM;
  92
  93         geometry = &private->domain->geometry;
  94         start = geometry->aperture_start;
  95         end = geometry->aperture_end;
  96
  97         DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
  98                   start, end);
  99         drm_mm_init(&private->mm, start, end - start + 1);
 100         mutex_init(&private->mm_lock);
 101
 102         return 0;
 103 }
 104
 105 static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
 106 {
 107         struct rockchip_drm_private *private = drm_dev->dev_private;
 108
 109         if (!is_support_iommu)
 110                 return;
 111
 112         drm_mm_takedown(&private->mm);
 113         iommu_domain_free(private->domain);
 114 }
 115
 116 static int rockchip_drm_bind(struct device *dev)
 117 {
 118         struct drm_device *drm_dev;
 119         struct rockchip_drm_private *private;
 120         int ret;
 121
 122         drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
 123         if (IS_ERR(drm_dev))
 124                 return PTR_ERR(drm_dev);
 125
 126         dev_set_drvdata(dev, drm_dev);
 127
 128         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 129         if (!private) {
 130                 ret = -ENOMEM;
 131                 goto err_free;
 132         }
 133
 134         drm_dev->dev_private = private;
 135
 136         INIT_LIST_HEAD(&private->psr_list);
 137         mutex_init(&private->psr_list_lock);
 138
 139         ret = rockchip_drm_init_iommu(drm_dev);
 140         if (ret)
 141                 goto err_free;
 142
 143         drm_mode_config_init(drm_dev);
 144
 145         rockchip_drm_mode_config_init(drm_dev);
 146
 147         /* Try to bind all sub drivers. */
 148         ret = component_bind_all(dev, drm_dev);
 149         if (ret)
 150                 goto err_mode_config_cleanup;
 151
 152         ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
 153         if (ret)
 154                 goto err_unbind_all;
 155
 156         drm_mode_config_reset(drm_dev);
 157
 158         /*
 159          * enable drm irq mode.
 160          * - with irq_enabled = true, we can use the vblank feature.
 161          */
 162         drm_dev->irq_enabled = true;
 163
 164         ret = rockchip_drm_fbdev_init(drm_dev);
 165         if (ret)
 166                 goto err_unbind_all;
 167
 168         /* init kms poll for handling hpd */
 169         drm_kms_helper_poll_init(drm_dev);
 170
 171         ret = drm_dev_register(drm_dev, 0);
 172         if (ret)
 173                 goto err_kms_helper_poll_fini;
 174
 175         return 0;
 176 err_kms_helper_poll_fini:
 177         drm_kms_helper_poll_fini(drm_dev);
 178         rockchip_drm_fbdev_fini(drm_dev);
 179 err_unbind_all:
 180         component_unbind_all(dev, drm_dev);
 181 err_mode_config_cleanup:
 182         drm_mode_config_cleanup(drm_dev);
 183         rockchip_iommu_cleanup(drm_dev);
 184 err_free:
 185         drm_dev->dev_private = NULL;
 186         dev_set_drvdata(dev, NULL);
 187         drm_dev_unref(drm_dev);
 188         return ret;
 189 }
 190
 191 static void rockchip_drm_unbind(struct device *dev)
 192 {
 193         struct drm_device *drm_dev = dev_get_drvdata(dev);
 194
 195         drm_dev_unregister(drm_dev);
 196
 197         rockchip_drm_fbdev_fini(drm_dev);
 198         drm_kms_helper_poll_fini(drm_dev);
 199
 200         drm_atomic_helper_shutdown(drm_dev);
 201         component_unbind_all(dev, drm_dev);
 202         drm_mode_config_cleanup(drm_dev);
 203         rockchip_iommu_cleanup(drm_dev);
 204
 205         drm_dev->dev_private = NULL;
 206         dev_set_drvdata(dev, NULL);
 207         drm_dev_unref(drm_dev);
 208 }
 209
 210 static const struct file_operations rockchip_drm_driver_fops = {
 211         .owner = THIS_MODULE,
 212         .open = drm_open,
 213         .mmap = rockchip_gem_mmap,
 214         .poll = drm_poll,
 215         .read = drm_read,
 216         .unlocked_ioctl = drm_ioctl,
 217         .compat_ioctl = drm_compat_ioctl,
 218         .release = drm_release,
 219 };
 220
 221 static struct drm_driver rockchip_drm_driver = {
 222         .driver_features        = DRIVER_MODESET | DRIVER_GEM |
 223                                   DRIVER_PRIME | DRIVER_ATOMIC,
 224         .lastclose              = drm_fb_helper_lastclose,
 225         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 226         .gem_free_object_unlocked = rockchip_gem_free_object,
 227         .dumb_create            = rockchip_gem_dumb_create,
 228         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 229         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 230         .gem_prime_import       = drm_gem_prime_import,
 231         .gem_prime_export       = drm_gem_prime_export,
 232         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
 233         .gem_prime_import_sg_table      = rockchip_gem_prime_import_sg_table,
 234         .gem_prime_vmap         = rockchip_gem_prime_vmap,
 235         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
 236         .gem_prime_mmap         = rockchip_gem_mmap_buf,
 237         .fops                   = &rockchip_drm_driver_fops,
 238         .name   = DRIVER_NAME,
 239         .desc   = DRIVER_DESC,
 240         .date   = DRIVER_DATE,
 241         .major  = DRIVER_MAJOR,
 242         .minor  = DRIVER_MINOR,
 243 };
 244
 245 #ifdef CONFIG_PM_SLEEP
 246 static void rockchip_drm_fb_suspend(struct drm_device *drm)
 247 {
 248         struct rockchip_drm_private *priv = drm->dev_private;
 249
 250         console_lock();
 251         drm_fb_helper_set_suspend(&priv->fbdev_helper, 1);
 252         console_unlock();
 253 }
 254
 255 static void rockchip_drm_fb_resume(struct drm_device *drm)
 256 {
 257         struct rockchip_drm_private *priv = drm->dev_private;
 258
 259         console_lock();
 260         drm_fb_helper_set_suspend(&priv->fbdev_helper, 0);
 261         console_unlock();
 262 }
 263
 264 static int rockchip_drm_sys_suspend(struct device *dev)
 265 {
 266         struct drm_device *drm = dev_get_drvdata(dev);
 267         struct rockchip_drm_private *priv;
 268
 269         if (!drm)
 270                 return 0;
 271
 272         drm_kms_helper_poll_disable(drm);
 273         rockchip_drm_fb_suspend(drm);
 274
 275         priv = drm->dev_private;
 276         priv->state = drm_atomic_helper_suspend(drm);
 277         if (IS_ERR(priv->state)) {
 278                 rockchip_drm_fb_resume(drm);
 279                 drm_kms_helper_poll_enable(drm);
 280                 return PTR_ERR(priv->state);
 281         }
 282
 283         return 0;
 284 }
 285
 286 static int rockchip_drm_sys_resume(struct device *dev)
 287 {
 288         struct drm_device *drm = dev_get_drvdata(dev);
 289         struct rockchip_drm_private *priv;
 290
 291         if (!drm)
 292                 return 0;
 293
 294         priv = drm->dev_private;
 295         drm_atomic_helper_resume(drm, priv->state);
 296         rockchip_drm_fb_resume(drm);
 297         drm_kms_helper_poll_enable(drm);
 298
 299         return 0;
 300 }
 301 #endif
 302
 303 static const struct dev_pm_ops rockchip_drm_pm_ops = {
 304         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
 305                                 rockchip_drm_sys_resume)
 306 };
 307
 308 #define MAX_ROCKCHIP_SUB_DRIVERS 16
 309 static struct platform_driver *rockchip_sub_drivers[MAX_ROCKCHIP_SUB_DRIVERS];
 310 static int num_rockchip_sub_drivers;
 311
 312 static int compare_dev(struct device *dev, void *data)
 313 {
 314         return dev == (struct device *)data;
 315 }
 316
 317 static void rockchip_drm_match_remove(struct device *dev)
 318 {
 319         struct device_link *link;
 320
 321         list_for_each_entry(link, &dev->links.consumers, s_node)
 322                 device_link_del(link);
 323 }
 324
 325 static struct component_match *rockchip_drm_match_add(struct device *dev)
 326 {
 327         struct component_match *match = NULL;
 328         int i;
 329
 330         for (i = 0; i < num_rockchip_sub_drivers; i++) {
 331                 struct platform_driver *drv = rockchip_sub_drivers[i];
 332                 struct device *p = NULL, *d;
 333
 334                 do {
 335                         d = bus_find_device(&platform_bus_type, p, &drv->driver,
 336                                             (void *)platform_bus_type.match);
 337                         put_device(p);
 338                         p = d;
 339
 340                         if (!d)
 341                                 break;
 342
 343                         device_link_add(dev, d, DL_FLAG_STATELESS);
 344                         component_match_add(dev, &match, compare_dev, d);
 345                 } while (true);
 346         }
 347
 348         if (IS_ERR(match))
 349                 rockchip_drm_match_remove(dev);
 350
 351         return match ?: ERR_PTR(-ENODEV);
 352 }
 353
 354 static const struct component_master_ops rockchip_drm_ops = {
 355         .bind = rockchip_drm_bind,
 356         .unbind = rockchip_drm_unbind,
 357 };
 358
 359 static int rockchip_drm_platform_of_probe(struct device *dev)
 360 {
 361         struct device_node *np = dev->of_node;
 362         struct device_node *port;
 363         bool found = false;
 364         int i;
 365
 366         if (!np)
 367                 return -ENODEV;
 368
 369         for (i = 0;; i++) {
 370                 struct device_node *iommu;
 371
 372                 port = of_parse_phandle(np, "ports", i);
 373                 if (!port)
 374                         break;
 375
 376                 if (!of_device_is_available(port->parent)) {
 377                         of_node_put(port);
 378                         continue;
 379                 }
 380
 381                 iommu = of_parse_phandle(port->parent, "iommus", 0);
 382                 if (!iommu || !of_device_is_available(iommu->parent)) {
 383                         DRM_DEV_DEBUG(dev,
 384                                       "no iommu attached for %pOF, using non-iommu buffers\n",
 385                                       port->parent);
 386                         /*
 387                          * if there is a crtc not support iommu, force set all
 388                          * crtc use non-iommu buffer.
 389                          */
 390                         is_support_iommu = false;
 391                 }
 392
 393                 found = true;
 394
 395                 of_node_put(iommu);
 396                 of_node_put(port);
 397         }
 398
 399         if (i == 0) {
 400                 DRM_DEV_ERROR(dev, "missing 'ports' property\n");
 401                 return -ENODEV;
 402         }
 403
 404         if (!found) {
 405                 DRM_DEV_ERROR(dev,
 406                               "No available vop found for display-subsystem.\n");
 407                 return -ENODEV;
 408         }
 409
 410         return 0;
 411 }
 412
 413 static int rockchip_drm_platform_probe(struct platform_device *pdev)
 414 {
 415         struct device *dev = &pdev->dev;
 416         struct component_match *match = NULL;
 417         int ret;
 418
 419         ret = rockchip_drm_platform_of_probe(dev);
 420         if (ret)
 421                 return ret;
 422
 423         match = rockchip_drm_match_add(dev);
 424         if (IS_ERR(match))
 425                 return PTR_ERR(match);
 426
 427         ret = component_master_add_with_match(dev, &rockchip_drm_ops, match);
 428         if (ret < 0) {
 429                 rockchip_drm_match_remove(dev);
 430                 return ret;
 431         }
 432
 433         return 0;
 434 }
 435
 436 static int rockchip_drm_platform_remove(struct platform_device *pdev)
 437 {
 438         component_master_del(&pdev->dev, &rockchip_drm_ops);
 439
 440         rockchip_drm_match_remove(&pdev->dev);
 441
 442         return 0;
 443 }
 444
 445 static void rockchip_drm_platform_shutdown(struct platform_device *pdev)
 446 {
 447         struct drm_device *drm = platform_get_drvdata(pdev);
 448
 449         if (drm)
 450                 drm_atomic_helper_shutdown(drm);
 451 }
 452
 453 static const struct of_device_id rockchip_drm_dt_ids[] = {
 454         { .compatible = "rockchip,display-subsystem", },
 455         { /* sentinel */ },
 456 };
 457 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
 458
 459 static struct platform_driver rockchip_drm_platform_driver = {
 460         .probe = rockchip_drm_platform_probe,
 461         .remove = rockchip_drm_platform_remove,
 462         .shutdown = rockchip_drm_platform_shutdown,
 463         .driver = {
 464                 .name = "rockchip-drm",
 465                 .of_match_table = rockchip_drm_dt_ids,
 466                 .pm = &rockchip_drm_pm_ops,
 467         },
 468 };
 469
 470 #define ADD_ROCKCHIP_SUB_DRIVER(drv, cond) { \
 471         if (IS_ENABLED(cond) && \
 472             !WARN_ON(num_rockchip_sub_drivers >= MAX_ROCKCHIP_SUB_DRIVERS)) \
 473                 rockchip_sub_drivers[num_rockchip_sub_drivers++] = &drv; \
 474 }
 475
 476 static int __init rockchip_drm_init(void)
 477 {
 478         int ret;
 479
 480         num_rockchip_sub_drivers = 0;
 481         ADD_ROCKCHIP_SUB_DRIVER(vop_platform_driver, CONFIG_DRM_ROCKCHIP);
 482         ADD_ROCKCHIP_SUB_DRIVER(rockchip_lvds_driver,
 483                                 CONFIG_ROCKCHIP_LVDS);
 484         ADD_ROCKCHIP_SUB_DRIVER(rockchip_dp_driver,
 485                                 CONFIG_ROCKCHIP_ANALOGIX_DP);
 486         ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
 487         ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
 488                                 CONFIG_ROCKCHIP_DW_HDMI);
 489         ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_driver,
 490                                 CONFIG_ROCKCHIP_DW_MIPI_DSI);
 491         ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
 492
 493         ret = platform_register_drivers(rockchip_sub_drivers,
 494                                         num_rockchip_sub_drivers);
 495         if (ret)
 496                 return ret;
 497
 498         ret = platform_driver_register(&rockchip_drm_platform_driver);
 499         if (ret)
 500                 goto err_unreg_drivers;
 501
 502         return 0;
 503
 504 err_unreg_drivers:
 505         platform_unregister_drivers(rockchip_sub_drivers,
 506                                     num_rockchip_sub_drivers);
 507         return ret;
 508 }
 509
 510 static void __exit rockchip_drm_fini(void)
 511 {
 512         platform_driver_unregister(&rockchip_drm_platform_driver);
 513
 514         platform_unregister_drivers(rockchip_sub_drivers,
 515                                     num_rockchip_sub_drivers);
 516 }
 517
 518 module_init(rockchip_drm_init);
 519 module_exit(rockchip_drm_fini);
 520
 521 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
 522 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
 523 MODULE_LICENSE("GPL v2");