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                 dev_err(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 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
  81                                  const struct rockchip_crtc_funcs *crtc_funcs)
  82 {
  83         int pipe = drm_crtc_index(crtc);
  84         struct rockchip_drm_private *priv = crtc->dev->dev_private;
  85
  86         if (pipe >= ROCKCHIP_MAX_CRTC)
  87                 return -EINVAL;
  88
  89         priv->crtc_funcs[pipe] = crtc_funcs;
  90
  91         return 0;
  92 }
  93
  94 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
  95 {
  96         int pipe = drm_crtc_index(crtc);
  97         struct rockchip_drm_private *priv = crtc->dev->dev_private;
  98
  99         if (pipe >= ROCKCHIP_MAX_CRTC)
 100                 return;
 101
 102         priv->crtc_funcs[pipe] = NULL;
 103 }
 104
 105 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
 106                                            unsigned int pipe)
 107 {
 108         struct rockchip_drm_private *priv = dev->dev_private;
 109         struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe);
 110
 111         if (crtc && priv->crtc_funcs[pipe] &&
 112             priv->crtc_funcs[pipe]->enable_vblank)
 113                 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
 114
 115         return 0;
 116 }
 117
 118 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
 119                                              unsigned int pipe)
 120 {
 121         struct rockchip_drm_private *priv = dev->dev_private;
 122         struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe);
 123
 124         if (crtc && priv->crtc_funcs[pipe] &&
 125             priv->crtc_funcs[pipe]->enable_vblank)
 126                 priv->crtc_funcs[pipe]->disable_vblank(crtc);
 127 }
 128
 129 static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
 130 {
 131         struct rockchip_drm_private *private = drm_dev->dev_private;
 132         struct iommu_domain_geometry *geometry;
 133         u64 start, end;
 134
 135         if (!is_support_iommu)
 136                 return 0;
 137
 138         private->domain = iommu_domain_alloc(&platform_bus_type);
 139         if (!private->domain)
 140                 return -ENOMEM;
 141
 142         geometry = &private->domain->geometry;
 143         start = geometry->aperture_start;
 144         end = geometry->aperture_end;
 145
 146         DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
 147                   start, end);
 148         drm_mm_init(&private->mm, start, end - start + 1);
 149         mutex_init(&private->mm_lock);
 150
 151         return 0;
 152 }
 153
 154 static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
 155 {
 156         struct rockchip_drm_private *private = drm_dev->dev_private;
 157
 158         if (!is_support_iommu)
 159                 return;
 160
 161         drm_mm_takedown(&private->mm);
 162         iommu_domain_free(private->domain);
 163 }
 164
 165 static int rockchip_drm_bind(struct device *dev)
 166 {
 167         struct drm_device *drm_dev;
 168         struct rockchip_drm_private *private;
 169         int ret;
 170
 171         drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
 172         if (IS_ERR(drm_dev))
 173                 return PTR_ERR(drm_dev);
 174
 175         dev_set_drvdata(dev, drm_dev);
 176
 177         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 178         if (!private) {
 179                 ret = -ENOMEM;
 180                 goto err_free;
 181         }
 182
 183         drm_dev->dev_private = private;
 184
 185         INIT_LIST_HEAD(&private->psr_list);
 186         spin_lock_init(&private->psr_list_lock);
 187
 188         drm_mode_config_init(drm_dev);
 189
 190         rockchip_drm_mode_config_init(drm_dev);
 191
 192         ret = rockchip_drm_init_iommu(drm_dev);
 193         if (ret)
 194                 goto err_config_cleanup;
 195
 196         /* Try to bind all sub drivers. */
 197         ret = component_bind_all(dev, drm_dev);
 198         if (ret)
 199                 goto err_iommu_cleanup;
 200
 201         /* init kms poll for handling hpd */
 202         drm_kms_helper_poll_init(drm_dev);
 203
 204         /*
 205          * enable drm irq mode.
 206          * - with irq_enabled = true, we can use the vblank feature.
 207          */
 208         drm_dev->irq_enabled = true;
 209
 210         ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
 211         if (ret)
 212                 goto err_kms_helper_poll_fini;
 213
 214         drm_mode_config_reset(drm_dev);
 215
 216         ret = rockchip_drm_fbdev_init(drm_dev);
 217         if (ret)
 218                 goto err_vblank_cleanup;
 219
 220         ret = drm_dev_register(drm_dev, 0);
 221         if (ret)
 222                 goto err_fbdev_fini;
 223
 224         return 0;
 225 err_fbdev_fini:
 226         rockchip_drm_fbdev_fini(drm_dev);
 227 err_vblank_cleanup:
 228         drm_vblank_cleanup(drm_dev);
 229 err_kms_helper_poll_fini:
 230         drm_kms_helper_poll_fini(drm_dev);
 231         component_unbind_all(dev, drm_dev);
 232 err_iommu_cleanup:
 233         rockchip_iommu_cleanup(drm_dev);
 234 err_config_cleanup:
 235         drm_mode_config_cleanup(drm_dev);
 236         drm_dev->dev_private = NULL;
 237 err_free:
 238         drm_dev_unref(drm_dev);
 239         return ret;
 240 }
 241
 242 static void rockchip_drm_unbind(struct device *dev)
 243 {
 244         struct drm_device *drm_dev = dev_get_drvdata(dev);
 245
 246         rockchip_drm_fbdev_fini(drm_dev);
 247         drm_vblank_cleanup(drm_dev);
 248         drm_kms_helper_poll_fini(drm_dev);
 249         component_unbind_all(dev, drm_dev);
 250         rockchip_iommu_cleanup(drm_dev);
 251         drm_mode_config_cleanup(drm_dev);
 252         drm_dev->dev_private = NULL;
 253         drm_dev_unregister(drm_dev);
 254         drm_dev_unref(drm_dev);
 255         dev_set_drvdata(dev, NULL);
 256 }
 257
 258 static void rockchip_drm_lastclose(struct drm_device *dev)
 259 {
 260         struct rockchip_drm_private *priv = dev->dev_private;
 261
 262         drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
 263 }
 264
 265 static const struct file_operations rockchip_drm_driver_fops = {
 266         .owner = THIS_MODULE,
 267         .open = drm_open,
 268         .mmap = rockchip_gem_mmap,
 269         .poll = drm_poll,
 270         .read = drm_read,
 271         .unlocked_ioctl = drm_ioctl,
 272         .compat_ioctl = drm_compat_ioctl,
 273         .release = drm_release,
 274 };
 275
 276 static struct drm_driver rockchip_drm_driver = {
 277         .driver_features        = DRIVER_MODESET | DRIVER_GEM |
 278                                   DRIVER_PRIME | DRIVER_ATOMIC,
 279         .lastclose              = rockchip_drm_lastclose,
 280         .get_vblank_counter     = drm_vblank_no_hw_counter,
 281         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
 282         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
 283         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 284         .gem_free_object_unlocked = rockchip_gem_free_object,
 285         .dumb_create            = rockchip_gem_dumb_create,
 286         .dumb_map_offset        = rockchip_gem_dumb_map_offset,
 287         .dumb_destroy           = drm_gem_dumb_destroy,
 288         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 289         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 290         .gem_prime_import       = drm_gem_prime_import,
 291         .gem_prime_export       = drm_gem_prime_export,
 292         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
 293         .gem_prime_vmap         = rockchip_gem_prime_vmap,
 294         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
 295         .gem_prime_mmap         = rockchip_gem_mmap_buf,
 296         .fops                   = &rockchip_drm_driver_fops,
 297         .name   = DRIVER_NAME,
 298         .desc   = DRIVER_DESC,
 299         .date   = DRIVER_DATE,
 300         .major  = DRIVER_MAJOR,
 301         .minor  = DRIVER_MINOR,
 302 };
 303
 304 #ifdef CONFIG_PM_SLEEP
 305 static void rockchip_drm_fb_suspend(struct drm_device *drm)
 306 {
 307         struct rockchip_drm_private *priv = drm->dev_private;
 308
 309         console_lock();
 310         drm_fb_helper_set_suspend(&priv->fbdev_helper, 1);
 311         console_unlock();
 312 }
 313
 314 static void rockchip_drm_fb_resume(struct drm_device *drm)
 315 {
 316         struct rockchip_drm_private *priv = drm->dev_private;
 317
 318         console_lock();
 319         drm_fb_helper_set_suspend(&priv->fbdev_helper, 0);
 320         console_unlock();
 321 }
 322
 323 static int rockchip_drm_sys_suspend(struct device *dev)
 324 {
 325         struct drm_device *drm = dev_get_drvdata(dev);
 326         struct rockchip_drm_private *priv = drm->dev_private;
 327
 328         drm_kms_helper_poll_disable(drm);
 329         rockchip_drm_fb_suspend(drm);
 330
 331         priv->state = drm_atomic_helper_suspend(drm);
 332         if (IS_ERR(priv->state)) {
 333                 rockchip_drm_fb_resume(drm);
 334                 drm_kms_helper_poll_enable(drm);
 335                 return PTR_ERR(priv->state);
 336         }
 337
 338         return 0;
 339 }
 340
 341 static int rockchip_drm_sys_resume(struct device *dev)
 342 {
 343         struct drm_device *drm = dev_get_drvdata(dev);
 344         struct rockchip_drm_private *priv = drm->dev_private;
 345
 346         drm_atomic_helper_resume(drm, priv->state);
 347         rockchip_drm_fb_resume(drm);
 348         drm_kms_helper_poll_enable(drm);
 349
 350         return 0;
 351 }
 352 #endif
 353
 354 static const struct dev_pm_ops rockchip_drm_pm_ops = {
 355         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
 356                                 rockchip_drm_sys_resume)
 357 };
 358
 359 static int compare_of(struct device *dev, void *data)
 360 {
 361         struct device_node *np = data;
 362
 363         return dev->of_node == np;
 364 }
 365
 366 static void rockchip_add_endpoints(struct device *dev,
 367                                    struct component_match **match,
 368                                    struct device_node *port)
 369 {
 370         struct device_node *ep, *remote;
 371
 372         for_each_child_of_node(port, ep) {
 373                 remote = of_graph_get_remote_port_parent(ep);
 374                 if (!remote || !of_device_is_available(remote)) {
 375                         of_node_put(remote);
 376                         continue;
 377                 } else if (!of_device_is_available(remote->parent)) {
 378                         dev_warn(dev, "parent device of %s is not available\n",
 379                                  remote->full_name);
 380                         of_node_put(remote);
 381                         continue;
 382                 }
 383
 384                 drm_of_component_match_add(dev, match, compare_of, remote);
 385                 of_node_put(remote);
 386         }
 387 }
 388
 389 static const struct component_master_ops rockchip_drm_ops = {
 390         .bind = rockchip_drm_bind,
 391         .unbind = rockchip_drm_unbind,
 392 };
 393
 394 static int rockchip_drm_platform_probe(struct platform_device *pdev)
 395 {
 396         struct device *dev = &pdev->dev;
 397         struct component_match *match = NULL;
 398         struct device_node *np = dev->of_node;
 399         struct device_node *port;
 400         int i;
 401
 402         if (!np)
 403                 return -ENODEV;
 404         /*
 405          * Bind the crtc ports first, so that
 406          * drm_of_find_possible_crtcs called from encoder .bind callbacks
 407          * works as expected.
 408          */
 409         for (i = 0;; i++) {
 410                 struct device_node *iommu;
 411
 412                 port = of_parse_phandle(np, "ports", i);
 413                 if (!port)
 414                         break;
 415
 416                 if (!of_device_is_available(port->parent)) {
 417                         of_node_put(port);
 418                         continue;
 419                 }
 420
 421                 iommu = of_parse_phandle(port->parent, "iommus", 0);
 422                 if (!iommu || !of_device_is_available(iommu->parent)) {
 423                         dev_dbg(dev, "no iommu attached for %s, using non-iommu buffers\n",
 424                                 port->parent->full_name);
 425                         /*
 426                          * if there is a crtc not support iommu, force set all
 427                          * crtc use non-iommu buffer.
 428                          */
 429                         is_support_iommu = false;
 430                 }
 431
 432                 of_node_put(iommu);
 433                 drm_of_component_match_add(dev, &match, compare_of,
 434                                            port->parent);
 435                 of_node_put(port);
 436         }
 437
 438         if (i == 0) {
 439                 dev_err(dev, "missing 'ports' property\n");
 440                 return -ENODEV;
 441         }
 442
 443         if (!match) {
 444                 dev_err(dev, "No available vop found for display-subsystem.\n");
 445                 return -ENODEV;
 446         }
 447         /*
 448          * For each bound crtc, bind the encoders attached to its
 449          * remote endpoint.
 450          */
 451         for (i = 0;; i++) {
 452                 port = of_parse_phandle(np, "ports", i);
 453                 if (!port)
 454                         break;
 455
 456                 if (!of_device_is_available(port->parent)) {
 457                         of_node_put(port);
 458                         continue;
 459                 }
 460
 461                 rockchip_add_endpoints(dev, &match, port);
 462                 of_node_put(port);
 463         }
 464
 465         return component_master_add_with_match(dev, &rockchip_drm_ops, match);
 466 }
 467
 468 static int rockchip_drm_platform_remove(struct platform_device *pdev)
 469 {
 470         component_master_del(&pdev->dev, &rockchip_drm_ops);
 471
 472         return 0;
 473 }
 474
 475 static const struct of_device_id rockchip_drm_dt_ids[] = {
 476         { .compatible = "rockchip,display-subsystem", },
 477         { /* sentinel */ },
 478 };
 479 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
 480
 481 static struct platform_driver rockchip_drm_platform_driver = {
 482         .probe = rockchip_drm_platform_probe,
 483         .remove = rockchip_drm_platform_remove,
 484         .driver = {
 485                 .name = "rockchip-drm",
 486                 .of_match_table = rockchip_drm_dt_ids,
 487                 .pm = &rockchip_drm_pm_ops,
 488         },
 489 };
 490
 491 module_platform_driver(rockchip_drm_platform_driver);
 492
 493 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
 494 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
 495 MODULE_LICENSE("GPL v2");