drivers/gpu/drm/rockchip/rockchip_drm_drv.c

   1 /*
   2  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
   3  * Author:Mark Yao <mark.yao@rock-chips.com>
   4  *
   5  * based on exynos_drm_drv.c
   6  *
   7  * This software is licensed under the terms of the GNU General Public
   8  * License version 2, as published by the Free Software Foundation, and
   9  * may be copied, distributed, and modified under those terms.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <asm/dma-iommu.h>
  18
  19 #include <drm/drmP.h>
  20 #include <drm/drm_crtc_helper.h>
  21 #include <drm/drm_fb_helper.h>
  22 #include <drm/drm_of.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/pm_runtime.h>
  25 #include <linux/module.h>
  26 #include <linux/of_graph.h>
  27 #include <linux/component.h>
  28
  29 #include "rockchip_drm_drv.h"
  30 #include "rockchip_drm_fb.h"
  31 #include "rockchip_drm_fbdev.h"
  32 #include "rockchip_drm_gem.h"
  33
  34 #define DRIVER_NAME     "rockchip"
  35 #define DRIVER_DESC     "RockChip Soc DRM"
  36 #define DRIVER_DATE     "20140818"
  37 #define DRIVER_MAJOR    1
  38 #define DRIVER_MINOR    0
  39
  40 /*
  41  * Attach a (component) device to the shared drm dma mapping from master drm
  42  * device.  This is used by the VOPs to map GEM buffers to a common DMA
  43  * mapping.
  44  */
  45 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
  46                                    struct device *dev)
  47 {
  48         struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
  49         int ret;
  50
  51         ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
  52         if (ret)
  53                 return ret;
  54
  55         dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
  56
  57         return arm_iommu_attach_device(dev, mapping);
  58 }
  59 EXPORT_SYMBOL_GPL(rockchip_drm_dma_attach_device);
  60
  61 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
  62                                     struct device *dev)
  63 {
  64         arm_iommu_detach_device(dev);
  65 }
  66 EXPORT_SYMBOL_GPL(rockchip_drm_dma_detach_device);
  67
  68 int rockchip_register_crtc_funcs(struct drm_device *dev,
  69                                  const struct rockchip_crtc_funcs *crtc_funcs,
  70                                  int pipe)
  71 {
  72         struct rockchip_drm_private *priv = dev->dev_private;
  73
  74         if (pipe > ROCKCHIP_MAX_CRTC)
  75                 return -EINVAL;
  76
  77         priv->crtc_funcs[pipe] = crtc_funcs;
  78
  79         return 0;
  80 }
  81 EXPORT_SYMBOL_GPL(rockchip_register_crtc_funcs);
  82
  83 void rockchip_unregister_crtc_funcs(struct drm_device *dev, int pipe)
  84 {
  85         struct rockchip_drm_private *priv = dev->dev_private;
  86
  87         if (pipe > ROCKCHIP_MAX_CRTC)
  88                 return;
  89
  90         priv->crtc_funcs[pipe] = NULL;
  91 }
  92 EXPORT_SYMBOL_GPL(rockchip_unregister_crtc_funcs);
  93
  94 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
  95                                                 int pipe)
  96 {
  97         struct drm_crtc *crtc;
  98         int i = 0;
  99
 100         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 101                 if (i++ == pipe)
 102                         return crtc;
 103
 104         return NULL;
 105 }
 106
 107 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
 108                                            unsigned int pipe)
 109 {
 110         struct rockchip_drm_private *priv = dev->dev_private;
 111         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 112
 113         if (crtc && priv->crtc_funcs[pipe] &&
 114             priv->crtc_funcs[pipe]->enable_vblank)
 115                 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
 116
 117         return 0;
 118 }
 119
 120 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
 121                                              unsigned int pipe)
 122 {
 123         struct rockchip_drm_private *priv = dev->dev_private;
 124         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 125
 126         if (crtc && priv->crtc_funcs[pipe] &&
 127             priv->crtc_funcs[pipe]->enable_vblank)
 128                 priv->crtc_funcs[pipe]->disable_vblank(crtc);
 129 }
 130
 131 static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
 132 {
 133         struct rockchip_drm_private *private;
 134         struct dma_iommu_mapping *mapping;
 135         struct device *dev = drm_dev->dev;
 136         struct drm_connector *connector;
 137         int ret;
 138
 139         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 140         if (!private)
 141                 return -ENOMEM;
 142
 143         drm_dev->dev_private = private;
 144
 145         drm_mode_config_init(drm_dev);
 146
 147         rockchip_drm_mode_config_init(drm_dev);
 148
 149         dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
 150                                       GFP_KERNEL);
 151         if (!dev->dma_parms) {
 152                 ret = -ENOMEM;
 153                 goto err_config_cleanup;
 154         }
 155
 156         /* TODO(djkurtz): fetch the mapping start/size from somewhere */
 157         mapping = arm_iommu_create_mapping(&platform_bus_type, 0x00000000,
 158                                            SZ_2G);
 159         if (IS_ERR(mapping)) {
 160                 ret = PTR_ERR(mapping);
 161                 goto err_config_cleanup;
 162         }
 163
 164         ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
 165         if (ret)
 166                 goto err_release_mapping;
 167
 168         dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
 169
 170         ret = arm_iommu_attach_device(dev, mapping);
 171         if (ret)
 172                 goto err_release_mapping;
 173
 174         /* Try to bind all sub drivers. */
 175         ret = component_bind_all(dev, drm_dev);
 176         if (ret)
 177                 goto err_detach_device;
 178
 179         /*
 180          * All components are now added, we can publish the connector sysfs
 181          * entries to userspace.  This will generate hotplug events and so
 182          * userspace will expect to be able to access DRM at this point.
 183          */
 184         list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
 185                         head) {
 186                 ret = drm_connector_register(connector);
 187                 if (ret) {
 188                         dev_err(drm_dev->dev,
 189                                 "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
 190                                 connector->base.id,
 191                                 connector->name, ret);
 192                         goto err_unbind;
 193                 }
 194         }
 195
 196         /* init kms poll for handling hpd */
 197         drm_kms_helper_poll_init(drm_dev);
 198
 199         /*
 200          * enable drm irq mode.
 201          * - with irq_enabled = true, we can use the vblank feature.
 202          */
 203         drm_dev->irq_enabled = true;
 204
 205         ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
 206         if (ret)
 207                 goto err_kms_helper_poll_fini;
 208
 209         /*
 210          * with vblank_disable_allowed = true, vblank interrupt will be disabled
 211          * by drm timer once a current process gives up ownership of
 212          * vblank event.(after drm_vblank_put function is called)
 213          */
 214         drm_dev->vblank_disable_allowed = true;
 215
 216         ret = rockchip_drm_fbdev_init(drm_dev);
 217         if (ret)
 218                 goto err_vblank_cleanup;
 219
 220         return 0;
 221 err_vblank_cleanup:
 222         drm_vblank_cleanup(drm_dev);
 223 err_kms_helper_poll_fini:
 224         drm_kms_helper_poll_fini(drm_dev);
 225 err_unbind:
 226         component_unbind_all(dev, drm_dev);
 227 err_detach_device:
 228         arm_iommu_detach_device(dev);
 229 err_release_mapping:
 230         arm_iommu_release_mapping(dev->archdata.mapping);
 231 err_config_cleanup:
 232         drm_mode_config_cleanup(drm_dev);
 233         drm_dev->dev_private = NULL;
 234         return ret;
 235 }
 236
 237 static int rockchip_drm_unload(struct drm_device *drm_dev)
 238 {
 239         struct device *dev = drm_dev->dev;
 240
 241         rockchip_drm_fbdev_fini(drm_dev);
 242         drm_vblank_cleanup(drm_dev);
 243         drm_kms_helper_poll_fini(drm_dev);
 244         component_unbind_all(dev, drm_dev);
 245         arm_iommu_detach_device(dev);
 246         arm_iommu_release_mapping(dev->archdata.mapping);
 247         drm_mode_config_cleanup(drm_dev);
 248         drm_dev->dev_private = NULL;
 249
 250         return 0;
 251 }
 252
 253 void rockchip_drm_lastclose(struct drm_device *dev)
 254 {
 255         struct rockchip_drm_private *priv = dev->dev_private;
 256
 257         drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
 258 }
 259
 260 static const struct file_operations rockchip_drm_driver_fops = {
 261         .owner = THIS_MODULE,
 262         .open = drm_open,
 263         .mmap = rockchip_gem_mmap,
 264         .poll = drm_poll,
 265         .read = drm_read,
 266         .unlocked_ioctl = drm_ioctl,
 267 #ifdef CONFIG_COMPAT
 268         .compat_ioctl = drm_compat_ioctl,
 269 #endif
 270         .release = drm_release,
 271 };
 272
 273 const struct vm_operations_struct rockchip_drm_vm_ops = {
 274         .open = drm_gem_vm_open,
 275         .close = drm_gem_vm_close,
 276 };
 277
 278 static struct drm_driver rockchip_drm_driver = {
 279         .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 280         .load                   = rockchip_drm_load,
 281         .unload                 = rockchip_drm_unload,
 282         .lastclose              = rockchip_drm_lastclose,
 283         .get_vblank_counter     = drm_vblank_no_hw_counter,
 284         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
 285         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
 286         .gem_vm_ops             = &rockchip_drm_vm_ops,
 287         .gem_free_object        = rockchip_gem_free_object,
 288         .dumb_create            = rockchip_gem_dumb_create,
 289         .dumb_map_offset        = rockchip_gem_dumb_map_offset,
 290         .dumb_destroy           = drm_gem_dumb_destroy,
 291         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 292         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 293         .gem_prime_import       = drm_gem_prime_import,
 294         .gem_prime_export       = drm_gem_prime_export,
 295         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
 296         .gem_prime_vmap         = rockchip_gem_prime_vmap,
 297         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
 298         .gem_prime_mmap         = rockchip_gem_mmap_buf,
 299         .fops                   = &rockchip_drm_driver_fops,
 300         .name   = DRIVER_NAME,
 301         .desc   = DRIVER_DESC,
 302         .date   = DRIVER_DATE,
 303         .major  = DRIVER_MAJOR,
 304         .minor  = DRIVER_MINOR,
 305 };
 306
 307 #ifdef CONFIG_PM_SLEEP
 308 static int rockchip_drm_sys_suspend(struct device *dev)
 309 {
 310         struct drm_device *drm = dev_get_drvdata(dev);
 311         struct drm_connector *connector;
 312
 313         if (!drm)
 314                 return 0;
 315
 316         drm_modeset_lock_all(drm);
 317         list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
 318                 int old_dpms = connector->dpms;
 319
 320                 if (connector->funcs->dpms)
 321                         connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
 322
 323                 /* Set the old mode back to the connector for resume */
 324                 connector->dpms = old_dpms;
 325         }
 326         drm_modeset_unlock_all(drm);
 327
 328         return 0;
 329 }
 330
 331 static int rockchip_drm_sys_resume(struct device *dev)
 332 {
 333         struct drm_device *drm = dev_get_drvdata(dev);
 334         struct drm_connector *connector;
 335         enum drm_connector_status status;
 336         bool changed = false;
 337
 338         if (!drm)
 339                 return 0;
 340
 341         drm_modeset_lock_all(drm);
 342         list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
 343                 int desired_mode = connector->dpms;
 344
 345                 /*
 346                  * at suspend time, we save dpms to connector->dpms,
 347                  * restore the old_dpms, and at current time, the connector
 348                  * dpms status must be DRM_MODE_DPMS_OFF.
 349                  */
 350                 connector->dpms = DRM_MODE_DPMS_OFF;
 351
 352                 /*
 353                  * If the connector has been disconnected during suspend,
 354                  * disconnect it from the encoder and leave it off. We'll notify
 355                  * userspace at the end.
 356                  */
 357                 if (desired_mode == DRM_MODE_DPMS_ON) {
 358                         status = connector->funcs->detect(connector, true);
 359                         if (status == connector_status_disconnected) {
 360                                 connector->encoder = NULL;
 361                                 connector->status = status;
 362                                 changed = true;
 363                                 continue;
 364                         }
 365                 }
 366                 if (connector->funcs->dpms)
 367                         connector->funcs->dpms(connector, desired_mode);
 368         }
 369         drm_modeset_unlock_all(drm);
 370
 371         drm_helper_resume_force_mode(drm);
 372
 373         if (changed)
 374                 drm_kms_helper_hotplug_event(drm);
 375
 376         return 0;
 377 }
 378 #endif
 379
 380 static const struct dev_pm_ops rockchip_drm_pm_ops = {
 381         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
 382                                 rockchip_drm_sys_resume)
 383 };
 384
 385 /*
 386  * @node: device tree node containing encoder input ports
 387  * @encoder: drm_encoder
 388  */
 389 int rockchip_drm_encoder_get_mux_id(struct device_node *node,
 390                                     struct drm_encoder *encoder)
 391 {
 392         struct device_node *ep;
 393         struct drm_crtc *crtc = encoder->crtc;
 394         struct of_endpoint endpoint;
 395         struct device_node *port;
 396         int ret;
 397
 398         if (!node || !crtc)
 399                 return -EINVAL;
 400
 401         for_each_endpoint_of_node(node, ep) {
 402                 port = of_graph_get_remote_port(ep);
 403                 of_node_put(port);
 404                 if (port == crtc->port) {
 405                         ret = of_graph_parse_endpoint(ep, &endpoint);
 406                         of_node_put(ep);
 407                         return ret ?: endpoint.id;
 408                 }
 409         }
 410
 411         return -EINVAL;
 412 }
 413 EXPORT_SYMBOL_GPL(rockchip_drm_encoder_get_mux_id);
 414
 415 static int compare_of(struct device *dev, void *data)
 416 {
 417         struct device_node *np = data;
 418
 419         return dev->of_node == np;
 420 }
 421
 422 static int rockchip_drm_bind(struct device *dev)
 423 {
 424         struct drm_device *drm;
 425         int ret;
 426
 427         drm = drm_dev_alloc(&rockchip_drm_driver, dev);
 428         if (!drm)
 429                 return -ENOMEM;
 430
 431         ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
 432         if (ret)
 433                 goto err_free;
 434
 435         ret = drm_dev_register(drm, 0);
 436         if (ret)
 437                 goto err_free;
 438
 439         dev_set_drvdata(dev, drm);
 440
 441         return 0;
 442
 443 err_free:
 444         drm_dev_unref(drm);
 445         return ret;
 446 }
 447
 448 static void rockchip_drm_unbind(struct device *dev)
 449 {
 450         struct drm_device *drm = dev_get_drvdata(dev);
 451
 452         drm_dev_unregister(drm);
 453         drm_dev_unref(drm);
 454         dev_set_drvdata(dev, NULL);
 455 }
 456
 457 static const struct component_master_ops rockchip_drm_ops = {
 458         .bind = rockchip_drm_bind,
 459         .unbind = rockchip_drm_unbind,
 460 };
 461
 462 static int rockchip_drm_platform_probe(struct platform_device *pdev)
 463 {
 464         int ret = drm_of_component_probe(&pdev->dev, compare_of,
 465                                          &rockchip_drm_ops);
 466
 467         /* keep compatibility with old code that was returning -ENODEV */
 468         if (ret == -EINVAL)
 469                 return -ENODEV;
 470
 471         return ret;
 472 }
 473
 474 static int rockchip_drm_platform_remove(struct platform_device *pdev)
 475 {
 476         component_master_del(&pdev->dev, &rockchip_drm_ops);
 477
 478         return 0;
 479 }
 480
 481 static const struct of_device_id rockchip_drm_dt_ids[] = {
 482         { .compatible = "rockchip,display-subsystem", },
 483         { /* sentinel */ },
 484 };
 485 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
 486
 487 static struct platform_driver rockchip_drm_platform_driver = {
 488         .probe = rockchip_drm_platform_probe,
 489         .remove = rockchip_drm_platform_remove,
 490         .driver = {
 491                 .name = "rockchip-drm",
 492                 .of_match_table = rockchip_drm_dt_ids,
 493                 .pm = &rockchip_drm_pm_ops,
 494         },
 495 };
 496
 497 module_platform_driver(rockchip_drm_platform_driver);
 498
 499 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
 500 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
 501 MODULE_LICENSE("GPL v2");