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_gem_cma_helper.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 #include <linux/console.h>
  29
  30 #include "rockchip_drm_drv.h"
  31 #include "rockchip_drm_fb.h"
  32 #include "rockchip_drm_fbdev.h"
  33 #include "rockchip_drm_gem.h"
  34
  35 #define DRIVER_NAME     "rockchip"
  36 #define DRIVER_DESC     "RockChip Soc DRM"
  37 #define DRIVER_DATE     "20140818"
  38 #define DRIVER_MAJOR    1
  39 #define DRIVER_MINOR    0
  40
  41 static bool is_support_iommu = true;
  42 static struct drm_driver rockchip_drm_driver;
  43
  44 /*
  45  * Attach a (component) device to the shared drm dma mapping from master drm
  46  * device.  This is used by the VOPs to map GEM buffers to a common DMA
  47  * mapping.
  48  */
  49 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
  50                                    struct device *dev)
  51 {
  52         struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
  53         int ret;
  54
  55         if (!is_support_iommu)
  56                 return 0;
  57
  58         ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
  59         if (ret)
  60                 return ret;
  61
  62         dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
  63
  64         return arm_iommu_attach_device(dev, mapping);
  65 }
  66
  67 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
  68                                     struct device *dev)
  69 {
  70         if (!is_support_iommu)
  71                 return;
  72
  73         arm_iommu_detach_device(dev);
  74 }
  75
  76 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
  77                                  const struct rockchip_crtc_funcs *crtc_funcs)
  78 {
  79         int pipe = drm_crtc_index(crtc);
  80         struct rockchip_drm_private *priv = crtc->dev->dev_private;
  81
  82         if (pipe >= ROCKCHIP_MAX_CRTC)
  83                 return -EINVAL;
  84
  85         priv->crtc_funcs[pipe] = crtc_funcs;
  86
  87         return 0;
  88 }
  89
  90 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
  91 {
  92         int pipe = drm_crtc_index(crtc);
  93         struct rockchip_drm_private *priv = crtc->dev->dev_private;
  94
  95         if (pipe >= ROCKCHIP_MAX_CRTC)
  96                 return;
  97
  98         priv->crtc_funcs[pipe] = NULL;
  99 }
 100
 101 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
 102                                                 int pipe)
 103 {
 104         struct drm_crtc *crtc;
 105         int i = 0;
 106
 107         list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
 108                 if (i++ == pipe)
 109                         return crtc;
 110
 111         return NULL;
 112 }
 113
 114 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
 115                                            unsigned int pipe)
 116 {
 117         struct rockchip_drm_private *priv = dev->dev_private;
 118         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 119
 120         if (crtc && priv->crtc_funcs[pipe] &&
 121             priv->crtc_funcs[pipe]->enable_vblank)
 122                 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
 123
 124         return 0;
 125 }
 126
 127 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
 128                                              unsigned int pipe)
 129 {
 130         struct rockchip_drm_private *priv = dev->dev_private;
 131         struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
 132
 133         if (crtc && priv->crtc_funcs[pipe] &&
 134             priv->crtc_funcs[pipe]->enable_vblank)
 135                 priv->crtc_funcs[pipe]->disable_vblank(crtc);
 136 }
 137
 138 static int rockchip_drm_bind(struct device *dev)
 139 {
 140         struct drm_device *drm_dev;
 141         struct rockchip_drm_private *private;
 142         struct dma_iommu_mapping *mapping = NULL;
 143         int ret;
 144
 145         drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
 146         if (IS_ERR(drm_dev))
 147                 return PTR_ERR(drm_dev);
 148
 149         dev_set_drvdata(dev, drm_dev);
 150
 151         private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
 152         if (!private) {
 153                 ret = -ENOMEM;
 154                 goto err_free;
 155         }
 156
 157         drm_dev->dev_private = private;
 158
 159         INIT_LIST_HEAD(&private->psr_list);
 160         spin_lock_init(&private->psr_list_lock);
 161
 162         drm_mode_config_init(drm_dev);
 163
 164         rockchip_drm_mode_config_init(drm_dev);
 165
 166         dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
 167                                       GFP_KERNEL);
 168         if (!dev->dma_parms) {
 169                 ret = -ENOMEM;
 170                 goto err_config_cleanup;
 171         }
 172
 173         if (is_support_iommu) {
 174                 /* TODO(djkurtz): fetch the mapping start/size from somewhere */
 175                 mapping = arm_iommu_create_mapping(&platform_bus_type,
 176                                                    0x00000000,
 177                                                    SZ_2G);
 178                 if (IS_ERR(mapping)) {
 179                         ret = PTR_ERR(mapping);
 180                         goto err_config_cleanup;
 181                 }
 182
 183                 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
 184                 if (ret)
 185                         goto err_release_mapping;
 186
 187                 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
 188
 189                 ret = arm_iommu_attach_device(dev, mapping);
 190                 if (ret)
 191                         goto err_release_mapping;
 192         }
 193
 194         /* Try to bind all sub drivers. */
 195         ret = component_bind_all(dev, drm_dev);
 196         if (ret)
 197                 goto err_detach_device;
 198
 199         /* init kms poll for handling hpd */
 200         drm_kms_helper_poll_init(drm_dev);
 201
 202         /*
 203          * enable drm irq mode.
 204          * - with irq_enabled = true, we can use the vblank feature.
 205          */
 206         drm_dev->irq_enabled = true;
 207
 208         ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
 209         if (ret)
 210                 goto err_kms_helper_poll_fini;
 211
 212         drm_mode_config_reset(drm_dev);
 213
 214         ret = rockchip_drm_fbdev_init(drm_dev);
 215         if (ret)
 216                 goto err_vblank_cleanup;
 217
 218         ret = drm_dev_register(drm_dev, 0);
 219         if (ret)
 220                 goto err_fbdev_fini;
 221
 222         if (is_support_iommu)
 223                 arm_iommu_release_mapping(mapping);
 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_detach_device:
 233         if (is_support_iommu)
 234                 arm_iommu_detach_device(dev);
 235 err_release_mapping:
 236         if (is_support_iommu)
 237                 arm_iommu_release_mapping(mapping);
 238 err_config_cleanup:
 239         drm_mode_config_cleanup(drm_dev);
 240         drm_dev->dev_private = NULL;
 241 err_free:
 242         drm_dev_unref(drm_dev);
 243         return ret;
 244 }
 245
 246 static void rockchip_drm_unbind(struct device *dev)
 247 {
 248         struct drm_device *drm_dev = dev_get_drvdata(dev);
 249
 250         rockchip_drm_fbdev_fini(drm_dev);
 251         drm_vblank_cleanup(drm_dev);
 252         drm_kms_helper_poll_fini(drm_dev);
 253         component_unbind_all(dev, drm_dev);
 254         if (is_support_iommu)
 255                 arm_iommu_detach_device(dev);
 256         drm_mode_config_cleanup(drm_dev);
 257         drm_dev->dev_private = NULL;
 258         drm_dev_unregister(drm_dev);
 259         drm_dev_unref(drm_dev);
 260         dev_set_drvdata(dev, NULL);
 261 }
 262
 263 static void rockchip_drm_lastclose(struct drm_device *dev)
 264 {
 265         struct rockchip_drm_private *priv = dev->dev_private;
 266
 267         drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
 268 }
 269
 270 static const struct file_operations rockchip_drm_driver_fops = {
 271         .owner = THIS_MODULE,
 272         .open = drm_open,
 273         .mmap = rockchip_gem_mmap,
 274         .poll = drm_poll,
 275         .read = drm_read,
 276         .unlocked_ioctl = drm_ioctl,
 277 #ifdef CONFIG_COMPAT
 278         .compat_ioctl = drm_compat_ioctl,
 279 #endif
 280         .release = drm_release,
 281 };
 282
 283 static struct drm_driver rockchip_drm_driver = {
 284         .driver_features        = DRIVER_MODESET | DRIVER_GEM |
 285                                   DRIVER_PRIME | DRIVER_ATOMIC,
 286         .lastclose              = rockchip_drm_lastclose,
 287         .get_vblank_counter     = drm_vblank_no_hw_counter,
 288         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
 289         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
 290         .gem_vm_ops             = &drm_gem_cma_vm_ops,
 291         .gem_free_object_unlocked = rockchip_gem_free_object,
 292         .dumb_create            = rockchip_gem_dumb_create,
 293         .dumb_map_offset        = rockchip_gem_dumb_map_offset,
 294         .dumb_destroy           = drm_gem_dumb_destroy,
 295         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 296         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 297         .gem_prime_import       = drm_gem_prime_import,
 298         .gem_prime_export       = drm_gem_prime_export,
 299         .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
 300         .gem_prime_vmap         = rockchip_gem_prime_vmap,
 301         .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
 302         .gem_prime_mmap         = rockchip_gem_mmap_buf,
 303         .fops                   = &rockchip_drm_driver_fops,
 304         .name   = DRIVER_NAME,
 305         .desc   = DRIVER_DESC,
 306         .date   = DRIVER_DATE,
 307         .major  = DRIVER_MAJOR,
 308         .minor  = DRIVER_MINOR,
 309 };
 310
 311 #ifdef CONFIG_PM_SLEEP
 312 static void rockchip_drm_fb_suspend(struct drm_device *drm)
 313 {
 314         struct rockchip_drm_private *priv = drm->dev_private;
 315
 316         console_lock();
 317         drm_fb_helper_set_suspend(&priv->fbdev_helper, 1);
 318         console_unlock();
 319 }
 320
 321 static void rockchip_drm_fb_resume(struct drm_device *drm)
 322 {
 323         struct rockchip_drm_private *priv = drm->dev_private;
 324
 325         console_lock();
 326         drm_fb_helper_set_suspend(&priv->fbdev_helper, 0);
 327         console_unlock();
 328 }
 329
 330 static int rockchip_drm_sys_suspend(struct device *dev)
 331 {
 332         struct drm_device *drm = dev_get_drvdata(dev);
 333         struct rockchip_drm_private *priv = drm->dev_private;
 334
 335         drm_kms_helper_poll_disable(drm);
 336         rockchip_drm_fb_suspend(drm);
 337
 338         priv->state = drm_atomic_helper_suspend(drm);
 339         if (IS_ERR(priv->state)) {
 340                 rockchip_drm_fb_resume(drm);
 341                 drm_kms_helper_poll_enable(drm);
 342                 return PTR_ERR(priv->state);
 343         }
 344
 345         return 0;
 346 }
 347
 348 static int rockchip_drm_sys_resume(struct device *dev)
 349 {
 350         struct drm_device *drm = dev_get_drvdata(dev);
 351         struct rockchip_drm_private *priv = drm->dev_private;
 352
 353         drm_atomic_helper_resume(drm, priv->state);
 354         rockchip_drm_fb_resume(drm);
 355         drm_kms_helper_poll_enable(drm);
 356
 357         return 0;
 358 }
 359 #endif
 360
 361 static const struct dev_pm_ops rockchip_drm_pm_ops = {
 362         SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
 363                                 rockchip_drm_sys_resume)
 364 };
 365
 366 static int compare_of(struct device *dev, void *data)
 367 {
 368         struct device_node *np = data;
 369
 370         return dev->of_node == np;
 371 }
 372
 373 static void rockchip_add_endpoints(struct device *dev,
 374                                    struct component_match **match,
 375                                    struct device_node *port)
 376 {
 377         struct device_node *ep, *remote;
 378
 379         for_each_child_of_node(port, ep) {
 380                 remote = of_graph_get_remote_port_parent(ep);
 381                 if (!remote || !of_device_is_available(remote)) {
 382                         of_node_put(remote);
 383                         continue;
 384                 } else if (!of_device_is_available(remote->parent)) {
 385                         dev_warn(dev, "parent device of %s is not available\n",
 386                                  remote->full_name);
 387                         of_node_put(remote);
 388                         continue;
 389                 }
 390
 391                 component_match_add(dev, match, compare_of, remote);
 392                 of_node_put(remote);
 393         }
 394 }
 395
 396 static const struct component_master_ops rockchip_drm_ops = {
 397         .bind = rockchip_drm_bind,
 398         .unbind = rockchip_drm_unbind,
 399 };
 400
 401 static int rockchip_drm_platform_probe(struct platform_device *pdev)
 402 {
 403         struct device *dev = &pdev->dev;
 404         struct component_match *match = NULL;
 405         struct device_node *np = dev->of_node;
 406         struct device_node *port;
 407         int i;
 408
 409         if (!np)
 410                 return -ENODEV;
 411         /*
 412          * Bind the crtc ports first, so that
 413          * drm_of_find_possible_crtcs called from encoder .bind callbacks
 414          * works as expected.
 415          */
 416         for (i = 0;; i++) {
 417                 struct device_node *iommu;
 418
 419                 port = of_parse_phandle(np, "ports", i);
 420                 if (!port)
 421                         break;
 422
 423                 if (!of_device_is_available(port->parent)) {
 424                         of_node_put(port);
 425                         continue;
 426                 }
 427
 428                 iommu = of_parse_phandle(port->parent, "iommus", 0);
 429                 if (!iommu || !of_device_is_available(iommu->parent)) {
 430                         dev_dbg(dev, "no iommu attached for %s, using non-iommu buffers\n",
 431                                 port->parent->full_name);
 432                         /*
 433                          * if there is a crtc not support iommu, force set all
 434                          * crtc use non-iommu buffer.
 435                          */
 436                         is_support_iommu = false;
 437                 }
 438
 439                 of_node_put(iommu);
 440                 component_match_add(dev, &match, compare_of, port->parent);
 441                 of_node_put(port);
 442         }
 443
 444         if (i == 0) {
 445                 dev_err(dev, "missing 'ports' property\n");
 446                 return -ENODEV;
 447         }
 448
 449         if (!match) {
 450                 dev_err(dev, "No available vop found for display-subsystem.\n");
 451                 return -ENODEV;
 452         }
 453         /*
 454          * For each bound crtc, bind the encoders attached to its
 455          * remote endpoint.
 456          */
 457         for (i = 0;; i++) {
 458                 port = of_parse_phandle(np, "ports", i);
 459                 if (!port)
 460                         break;
 461
 462                 if (!of_device_is_available(port->parent)) {
 463                         of_node_put(port);
 464                         continue;
 465                 }
 466
 467                 rockchip_add_endpoints(dev, &match, port);
 468                 of_node_put(port);
 469         }
 470
 471         return component_master_add_with_match(dev, &rockchip_drm_ops, match);
 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");