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