drivers/gpu/drm/rockchip/rockchip_drm_drv.c

   1 /*
   2  * Copyright (C) ROCKCHIP, Inc.
   3  * Author:yzq<yzq@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
  20 #include <drm/rockchip_drm.h>
  21
  22 #include "rockchip_drm_drv.h"
  23 #include "rockchip_drm_crtc.h"
  24 #include "rockchip_drm_encoder.h"
  25 #include "rockchip_drm_fbdev.h"
  26 #include "rockchip_drm_fb.h"
  27 #include "rockchip_drm_gem.h"
  28 #include "rockchip_drm_plane.h"
  29 #include "rockchip_drm_dmabuf.h"
  30 #include "rockchip_drm_iommu.h"
  31
  32 #define DRIVER_NAME     "rockchip"
  33 #define DRIVER_DESC     "rockchip Soc DRM"
  34 #define DRIVER_DATE     "20140318"
  35 #define DRIVER_MAJOR    1
  36 #define DRIVER_MINOR    0
  37
  38 #define VBLANK_OFF_DELAY        50000
  39
  40 /* platform device pointer for eynos drm device. */
  41 static struct platform_device *rockchip_drm_pdev;
  42
  43 static int rockchip_drm_load(struct drm_device *dev, unsigned long flags)
  44 {
  45         struct rockchip_drm_private *private;
  46         int ret;
  47         int nr;
  48
  49         DRM_DEBUG_DRIVER("%s\n", __FILE__);
  50
  51         private = kzalloc(sizeof(struct rockchip_drm_private), GFP_KERNEL);
  52         if (!private) {
  53                 DRM_ERROR("failed to allocate private\n");
  54                 return -ENOMEM;
  55         }
  56
  57         INIT_LIST_HEAD(&private->pageflip_event_list);
  58         dev->dev_private = (void *)private;
  59
  60         /*
  61          * create mapping to manage iommu table and set a pointer to iommu
  62          * mapping structure to iommu_mapping of private data.
  63          * also this iommu_mapping can be used to check if iommu is supported
  64          * or not.
  65          */
  66         ret = drm_create_iommu_mapping(dev);
  67         if (ret < 0) {
  68                 DRM_ERROR("failed to create iommu mapping.\n");
  69                 goto err_crtc;
  70         }
  71
  72         drm_mode_config_init(dev);
  73
  74         /* init kms poll for handling hpd */
  75         drm_kms_helper_poll_init(dev);
  76
  77         rockchip_drm_mode_config_init(dev);
  78
  79         /*
  80          * ROCKCHIP4 is enough to have two CRTCs and each crtc would be used
  81          * without dependency of hardware.
  82          */
  83         for (nr = 0; nr < MAX_CRTC; nr++) {
  84                 ret = rockchip_drm_crtc_create(dev, nr);
  85                 if (ret)
  86                         goto err_release_iommu_mapping;
  87         }
  88
  89         for (nr = 0; nr < MAX_PLANE; nr++) {
  90                 struct drm_plane *plane;
  91                 unsigned int possible_crtcs = (1 << MAX_CRTC) - 1;
  92
  93                 plane = rockchip_plane_init(dev, possible_crtcs, false);
  94                 if (!plane)
  95                         goto err_release_iommu_mapping;
  96         }
  97
  98         ret = drm_vblank_init(dev, MAX_CRTC);
  99         if (ret)
 100                 goto err_release_iommu_mapping;
 101
 102         /*
 103          * probe sub drivers such as display controller and hdmi driver,
 104          * that were registered at probe() of platform driver
 105          * to the sub driver and create encoder and connector for them.
 106          */
 107         ret = rockchip_drm_device_register(dev);
 108         if (ret)
 109                 goto err_vblank;
 110
 111         /* setup possible_clones. */
 112         rockchip_drm_encoder_setup(dev);
 113
 114         /*
 115          * create and configure fb helper and also rockchip specific
 116          * fbdev object.
 117          */
 118         ret = rockchip_drm_fbdev_init(dev);
 119         if (ret) {
 120                 DRM_ERROR("failed to initialize drm fbdev\n");
 121                 goto err_drm_device;
 122         }
 123
 124         drm_vblank_offdelay = VBLANK_OFF_DELAY;
 125
 126         return 0;
 127
 128 err_drm_device:
 129         rockchip_drm_device_unregister(dev);
 130 err_vblank:
 131         drm_vblank_cleanup(dev);
 132 err_release_iommu_mapping:
 133         drm_release_iommu_mapping(dev);
 134 err_crtc:
 135         drm_mode_config_cleanup(dev);
 136         kfree(private);
 137
 138         return ret;
 139 }
 140
 141 static int rockchip_drm_unload(struct drm_device *dev)
 142 {
 143         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 144
 145         rockchip_drm_fbdev_fini(dev);
 146         rockchip_drm_device_unregister(dev);
 147         drm_vblank_cleanup(dev);
 148         drm_kms_helper_poll_fini(dev);
 149         drm_mode_config_cleanup(dev);
 150
 151         drm_release_iommu_mapping(dev);
 152         kfree(dev->dev_private);
 153
 154         dev->dev_private = NULL;
 155
 156         return 0;
 157 }
 158
 159 static int rockchip_drm_open(struct drm_device *dev, struct drm_file *file)
 160 {
 161         struct drm_rockchip_file_private *file_priv;
 162
 163         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 164
 165         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
 166         if (!file_priv)
 167                 return -ENOMEM;
 168
 169         file->driver_priv = file_priv;
 170
 171         return rockchip_drm_subdrv_open(dev, file);
 172 }
 173
 174 static void rockchip_drm_preclose(struct drm_device *dev,
 175                                         struct drm_file *file)
 176 {
 177         struct rockchip_drm_private *private = dev->dev_private;
 178         struct drm_pending_vblank_event *e, *t;
 179         unsigned long flags;
 180
 181         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 182
 183         /* release events of current file */
 184         spin_lock_irqsave(&dev->event_lock, flags);
 185         list_for_each_entry_safe(e, t, &private->pageflip_event_list,
 186                         base.link) {
 187                 if (e->base.file_priv == file) {
 188                         list_del(&e->base.link);
 189                         e->base.destroy(&e->base);
 190                 }
 191         }
 192         spin_unlock_irqrestore(&dev->event_lock, flags);
 193
 194         rockchip_drm_subdrv_close(dev, file);
 195 }
 196
 197 static void rockchip_drm_postclose(struct drm_device *dev, struct drm_file *file)
 198 {
 199         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 200
 201         if (!file->driver_priv)
 202                 return;
 203
 204         kfree(file->driver_priv);
 205         file->driver_priv = NULL;
 206 }
 207
 208 static void rockchip_drm_lastclose(struct drm_device *dev)
 209 {
 210         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 211
 212         rockchip_drm_fbdev_restore_mode(dev);
 213 }
 214
 215 static const struct vm_operations_struct rockchip_drm_gem_vm_ops = {
 216         .fault = rockchip_drm_gem_fault,
 217         .open = drm_gem_vm_open,
 218         .close = drm_gem_vm_close,
 219 };
 220
 221 static struct drm_ioctl_desc rockchip_ioctls[] = {
 222         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_CREATE, rockchip_drm_gem_create_ioctl,
 223                         DRM_UNLOCKED | DRM_AUTH),
 224         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_MAP_OFFSET,
 225                         rockchip_drm_gem_map_offset_ioctl, DRM_UNLOCKED |
 226                         DRM_AUTH),
 227         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_MMAP,
 228                         rockchip_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
 229         DRM_IOCTL_DEF_DRV(ROCKCHIP_GEM_GET,
 230                         rockchip_drm_gem_get_ioctl, DRM_UNLOCKED),
 231 };
 232
 233 static const struct file_operations rockchip_drm_driver_fops = {
 234         .owner          = THIS_MODULE,
 235         .open           = drm_open,
 236         .mmap           = rockchip_drm_gem_mmap,
 237         .poll           = drm_poll,
 238         .read           = drm_read,
 239         .unlocked_ioctl = drm_ioctl,
 240 #ifdef CONFIG_COMPAT
 241         .compat_ioctl = drm_compat_ioctl,
 242 #endif
 243         .release        = drm_release,
 244 };
 245
 246 static struct drm_driver rockchip_drm_driver = {
 247         .driver_features        = DRIVER_HAVE_IRQ | DRIVER_MODESET |
 248                                         DRIVER_GEM | DRIVER_PRIME,
 249         .load                   = rockchip_drm_load,
 250         .unload                 = rockchip_drm_unload,
 251         .open                   = rockchip_drm_open,
 252         .preclose               = rockchip_drm_preclose,
 253         .lastclose              = rockchip_drm_lastclose,
 254         .postclose              = rockchip_drm_postclose,
 255         .get_vblank_counter     = drm_vblank_count,
 256         .enable_vblank          = rockchip_drm_crtc_enable_vblank,
 257         .disable_vblank         = rockchip_drm_crtc_disable_vblank,
 258 //      .get_vblank_timestamp   = rockchip_get_crtc_vblank_timestamp,
 259         .gem_init_object        = rockchip_drm_gem_init_object,
 260         .gem_free_object        = rockchip_drm_gem_free_object,
 261         .gem_vm_ops             = &rockchip_drm_gem_vm_ops,
 262         .dumb_create            = rockchip_drm_gem_dumb_create,
 263         .dumb_map_offset        = rockchip_drm_gem_dumb_map_offset,
 264         .dumb_destroy           = rockchip_drm_gem_dumb_destroy,
 265         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 266         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 267         .gem_prime_export       = rockchip_dmabuf_prime_export,
 268         .gem_prime_import       = rockchip_dmabuf_prime_import,
 269         .ioctls                 = rockchip_ioctls,
 270         .fops                   = &rockchip_drm_driver_fops,
 271         .name   = DRIVER_NAME,
 272         .desc   = DRIVER_DESC,
 273         .date   = DRIVER_DATE,
 274         .major  = DRIVER_MAJOR,
 275         .minor  = DRIVER_MINOR,
 276 };
 277
 278 static int rockchip_drm_platform_probe(struct platform_device *pdev)
 279 {
 280         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 281
 282         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 283         rockchip_drm_driver.num_ioctls = DRM_ARRAY_SIZE(rockchip_ioctls);
 284
 285         return drm_platform_init(&rockchip_drm_driver, pdev);
 286 }
 287
 288 static int rockchip_drm_platform_remove(struct platform_device *pdev)
 289 {
 290         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 291
 292         drm_platform_exit(&rockchip_drm_driver, pdev);
 293
 294         return 0;
 295 }
 296
 297 static struct platform_driver rockchip_drm_platform_driver = {
 298         .probe          = rockchip_drm_platform_probe,
 299         .remove         = rockchip_drm_platform_remove,
 300         .driver         = {
 301                 .owner  = THIS_MODULE,
 302                 .name   = "rockchip-drm",
 303         },
 304 };
 305
 306 static int __init rockchip_drm_init(void)
 307 {
 308         int ret;
 309
 310         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 311
 312
 313 #ifdef CONFIG_DRM_ROCKCHIP_PRIMARY
 314         ret = platform_driver_register(&primary_platform_driver);
 315         if (ret < 0)
 316                 goto out_primary;
 317         platform_device_register_simple("primary-display", -1,
 318                         NULL, 0);
 319 #endif
 320 #ifdef CONFIG_DRM_ROCKCHIP_HDMI
 321         ret = platform_driver_register(&extend_platform_driver);
 322         if (ret < 0)
 323                 goto out_extend;
 324         platform_device_register_simple("extend-display", -1,
 325                         NULL, 0);
 326 #endif
 327
 328         ret = platform_driver_register(&rockchip_drm_platform_driver);
 329         if (ret < 0)
 330                 goto out_drm;
 331
 332
 333         rockchip_drm_pdev = platform_device_register_simple("rockchip-drm", -1,
 334                                 NULL, 0);
 335         if (IS_ERR(rockchip_drm_pdev)) {
 336                 ret = PTR_ERR(rockchip_drm_pdev);
 337                 goto out;
 338         }
 339
 340         return 0;
 341
 342 out:
 343         platform_driver_unregister(&rockchip_drm_platform_driver);
 344 out_drm:
 345 #ifdef CONFIG_DRM_ROCKCHIP_PRIMARY
 346         platform_driver_unregister(&primary_platform_driver);
 347 out_primary:
 348 #endif
 349 #ifdef CONFIG_DRM_ROCKCHIP_HDMI
 350         platform_driver_unregister(&extend_platform_driver);
 351 out_extend:
 352 #endif
 353         return ret;
 354 }
 355
 356 static void __exit rockchip_drm_exit(void)
 357 {
 358         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 359
 360         platform_device_unregister(rockchip_drm_pdev);
 361
 362         platform_driver_unregister(&rockchip_drm_platform_driver);
 363 }
 364
 365 module_init(rockchip_drm_init);
 366 module_exit(rockchip_drm_exit);