drivers/gpu/drm/exynos/exynos_drm_drv.c

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   3  * Authors:
   4  *      Inki Dae <inki.dae@samsung.com>
   5  *      Joonyoung Shim <jy0922.shim@samsung.com>
   6  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27
  28 #include <drm/drmP.h>
  29 #include <drm/drm_crtc_helper.h>
  30
  31 #include <drm/exynos_drm.h>
  32
  33 #include "exynos_drm_drv.h"
  34 #include "exynos_drm_crtc.h"
  35 #include "exynos_drm_encoder.h"
  36 #include "exynos_drm_fbdev.h"
  37 #include "exynos_drm_fb.h"
  38 #include "exynos_drm_gem.h"
  39 #include "exynos_drm_plane.h"
  40 #include "exynos_drm_vidi.h"
  41 #include "exynos_drm_dmabuf.h"
  42 #include "exynos_drm_g2d.h"
  43 #include "exynos_drm_iommu.h"
  44
  45 #define DRIVER_NAME     "exynos"
  46 #define DRIVER_DESC     "Samsung SoC DRM"
  47 #define DRIVER_DATE     "20110530"
  48 #define DRIVER_MAJOR    1
  49 #define DRIVER_MINOR    0
  50
  51 #define VBLANK_OFF_DELAY        50000
  52
  53 /* platform device pointer for eynos drm device. */
  54 static struct platform_device *exynos_drm_pdev;
  55
  56 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
  57 {
  58         struct exynos_drm_private *private;
  59         int ret;
  60         int nr;
  61
  62         DRM_DEBUG_DRIVER("%s\n", __FILE__);
  63
  64         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
  65         if (!private) {
  66                 DRM_ERROR("failed to allocate private\n");
  67                 return -ENOMEM;
  68         }
  69
  70         INIT_LIST_HEAD(&private->pageflip_event_list);
  71         dev->dev_private = (void *)private;
  72
  73         /*
  74          * create mapping to manage iommu table and set a pointer to iommu
  75          * mapping structure to iommu_mapping of private data.
  76          * also this iommu_mapping can be used to check if iommu is supported
  77          * or not.
  78          */
  79         ret = drm_create_iommu_mapping(dev);
  80         if (ret < 0) {
  81                 DRM_ERROR("failed to create iommu mapping.\n");
  82                 goto err_crtc;
  83         }
  84
  85         drm_mode_config_init(dev);
  86
  87         /* init kms poll for handling hpd */
  88         drm_kms_helper_poll_init(dev);
  89
  90         exynos_drm_mode_config_init(dev);
  91
  92         /*
  93          * EXYNOS4 is enough to have two CRTCs and each crtc would be used
  94          * without dependency of hardware.
  95          */
  96         for (nr = 0; nr < MAX_CRTC; nr++) {
  97                 ret = exynos_drm_crtc_create(dev, nr);
  98                 if (ret)
  99                         goto err_release_iommu_mapping;
 100         }
 101
 102         for (nr = 0; nr < MAX_PLANE; nr++) {
 103                 struct drm_plane *plane;
 104                 unsigned int possible_crtcs = (1 << MAX_CRTC) - 1;
 105
 106                 plane = exynos_plane_init(dev, possible_crtcs, false);
 107                 if (!plane)
 108                         goto err_release_iommu_mapping;
 109         }
 110
 111         ret = drm_vblank_init(dev, MAX_CRTC);
 112         if (ret)
 113                 goto err_release_iommu_mapping;
 114
 115         /*
 116          * probe sub drivers such as display controller and hdmi driver,
 117          * that were registered at probe() of platform driver
 118          * to the sub driver and create encoder and connector for them.
 119          */
 120         ret = exynos_drm_device_register(dev);
 121         if (ret)
 122                 goto err_vblank;
 123
 124         /* setup possible_clones. */
 125         exynos_drm_encoder_setup(dev);
 126
 127         /*
 128          * create and configure fb helper and also exynos specific
 129          * fbdev object.
 130          */
 131         ret = exynos_drm_fbdev_init(dev);
 132         if (ret) {
 133                 DRM_ERROR("failed to initialize drm fbdev\n");
 134                 goto err_drm_device;
 135         }
 136
 137         drm_vblank_offdelay = VBLANK_OFF_DELAY;
 138
 139         return 0;
 140
 141 err_drm_device:
 142         exynos_drm_device_unregister(dev);
 143 err_vblank:
 144         drm_vblank_cleanup(dev);
 145 err_release_iommu_mapping:
 146         drm_release_iommu_mapping(dev);
 147 err_crtc:
 148         drm_mode_config_cleanup(dev);
 149         kfree(private);
 150
 151         return ret;
 152 }
 153
 154 static int exynos_drm_unload(struct drm_device *dev)
 155 {
 156         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 157
 158         exynos_drm_fbdev_fini(dev);
 159         exynos_drm_device_unregister(dev);
 160         drm_vblank_cleanup(dev);
 161         drm_kms_helper_poll_fini(dev);
 162         drm_mode_config_cleanup(dev);
 163
 164         drm_release_iommu_mapping(dev);
 165         kfree(dev->dev_private);
 166
 167         dev->dev_private = NULL;
 168
 169         return 0;
 170 }
 171
 172 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 173 {
 174         struct drm_exynos_file_private *file_priv;
 175
 176         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 177
 178         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
 179         if (!file_priv)
 180                 return -ENOMEM;
 181
 182         file->driver_priv = file_priv;
 183
 184         return exynos_drm_subdrv_open(dev, file);
 185 }
 186
 187 static void exynos_drm_preclose(struct drm_device *dev,
 188                                         struct drm_file *file)
 189 {
 190         struct exynos_drm_private *private = dev->dev_private;
 191         struct drm_pending_vblank_event *e, *t;
 192         unsigned long flags;
 193
 194         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 195
 196         /* release events of current file */
 197         spin_lock_irqsave(&dev->event_lock, flags);
 198         list_for_each_entry_safe(e, t, &private->pageflip_event_list,
 199                         base.link) {
 200                 if (e->base.file_priv == file) {
 201                         list_del(&e->base.link);
 202                         e->base.destroy(&e->base);
 203                 }
 204         }
 205         spin_unlock_irqrestore(&dev->event_lock, flags);
 206
 207         exynos_drm_subdrv_close(dev, file);
 208 }
 209
 210 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
 211 {
 212         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 213
 214         if (!file->driver_priv)
 215                 return;
 216
 217         kfree(file->driver_priv);
 218         file->driver_priv = NULL;
 219 }
 220
 221 static void exynos_drm_lastclose(struct drm_device *dev)
 222 {
 223         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 224
 225         exynos_drm_fbdev_restore_mode(dev);
 226 }
 227
 228 static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
 229         .fault = exynos_drm_gem_fault,
 230         .open = drm_gem_vm_open,
 231         .close = drm_gem_vm_close,
 232 };
 233
 234 static struct drm_ioctl_desc exynos_ioctls[] = {
 235         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 236                         DRM_UNLOCKED | DRM_AUTH),
 237         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP_OFFSET,
 238                         exynos_drm_gem_map_offset_ioctl, DRM_UNLOCKED |
 239                         DRM_AUTH),
 240         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
 241                         exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
 242         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET,
 243                         exynos_drm_gem_get_ioctl, DRM_UNLOCKED),
 244         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,
 245                         vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH),
 246         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER,
 247                         exynos_g2d_get_ver_ioctl, DRM_UNLOCKED | DRM_AUTH),
 248         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST,
 249                         exynos_g2d_set_cmdlist_ioctl, DRM_UNLOCKED | DRM_AUTH),
 250         DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC,
 251                         exynos_g2d_exec_ioctl, DRM_UNLOCKED | DRM_AUTH),
 252 };
 253
 254 static const struct file_operations exynos_drm_driver_fops = {
 255         .owner          = THIS_MODULE,
 256         .open           = drm_open,
 257         .mmap           = exynos_drm_gem_mmap,
 258         .poll           = drm_poll,
 259         .read           = drm_read,
 260         .unlocked_ioctl = drm_ioctl,
 261 #ifdef CONFIG_COMPAT
 262         .compat_ioctl = drm_compat_ioctl,
 263 #endif
 264         .release        = drm_release,
 265 };
 266
 267 static struct drm_driver exynos_drm_driver = {
 268         .driver_features        = DRIVER_HAVE_IRQ | DRIVER_MODESET |
 269                                         DRIVER_GEM | DRIVER_PRIME,
 270         .load                   = exynos_drm_load,
 271         .unload                 = exynos_drm_unload,
 272         .open                   = exynos_drm_open,
 273         .preclose               = exynos_drm_preclose,
 274         .lastclose              = exynos_drm_lastclose,
 275         .postclose              = exynos_drm_postclose,
 276         .get_vblank_counter     = drm_vblank_count,
 277         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 278         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 279         .gem_init_object        = exynos_drm_gem_init_object,
 280         .gem_free_object        = exynos_drm_gem_free_object,
 281         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 282         .dumb_create            = exynos_drm_gem_dumb_create,
 283         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 284         .dumb_destroy           = exynos_drm_gem_dumb_destroy,
 285         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 286         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 287         .gem_prime_export       = exynos_dmabuf_prime_export,
 288         .gem_prime_import       = exynos_dmabuf_prime_import,
 289         .ioctls                 = exynos_ioctls,
 290         .fops                   = &exynos_drm_driver_fops,
 291         .name   = DRIVER_NAME,
 292         .desc   = DRIVER_DESC,
 293         .date   = DRIVER_DATE,
 294         .major  = DRIVER_MAJOR,
 295         .minor  = DRIVER_MINOR,
 296 };
 297
 298 static int exynos_drm_platform_probe(struct platform_device *pdev)
 299 {
 300         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 301
 302         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 303         exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);
 304
 305         return drm_platform_init(&exynos_drm_driver, pdev);
 306 }
 307
 308 static int exynos_drm_platform_remove(struct platform_device *pdev)
 309 {
 310         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 311
 312         drm_platform_exit(&exynos_drm_driver, pdev);
 313
 314         return 0;
 315 }
 316
 317 static struct platform_driver exynos_drm_platform_driver = {
 318         .probe          = exynos_drm_platform_probe,
 319         .remove         = __devexit_p(exynos_drm_platform_remove),
 320         .driver         = {
 321                 .owner  = THIS_MODULE,
 322                 .name   = "exynos-drm",
 323         },
 324 };
 325
 326 static int __init exynos_drm_init(void)
 327 {
 328         int ret;
 329
 330         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 331
 332 #ifdef CONFIG_DRM_EXYNOS_FIMD
 333         ret = platform_driver_register(&fimd_driver);
 334         if (ret < 0)
 335                 goto out_fimd;
 336 #endif
 337
 338 #ifdef CONFIG_DRM_EXYNOS_HDMI
 339         ret = platform_driver_register(&hdmi_driver);
 340         if (ret < 0)
 341                 goto out_hdmi;
 342         ret = platform_driver_register(&mixer_driver);
 343         if (ret < 0)
 344                 goto out_mixer;
 345         ret = platform_driver_register(&exynos_drm_common_hdmi_driver);
 346         if (ret < 0)
 347                 goto out_common_hdmi;
 348
 349         ret = exynos_platform_device_hdmi_register();
 350         if (ret < 0)
 351                 goto out_common_hdmi_dev;
 352 #endif
 353
 354 #ifdef CONFIG_DRM_EXYNOS_VIDI
 355         ret = platform_driver_register(&vidi_driver);
 356         if (ret < 0)
 357                 goto out_vidi;
 358 #endif
 359
 360 #ifdef CONFIG_DRM_EXYNOS_G2D
 361         ret = platform_driver_register(&g2d_driver);
 362         if (ret < 0)
 363                 goto out_g2d;
 364 #endif
 365
 366         ret = platform_driver_register(&exynos_drm_platform_driver);
 367         if (ret < 0)
 368                 goto out_drm;
 369
 370         exynos_drm_pdev = platform_device_register_simple("exynos-drm", -1,
 371                                 NULL, 0);
 372         if (IS_ERR_OR_NULL(exynos_drm_pdev)) {
 373                 ret = PTR_ERR(exynos_drm_pdev);
 374                 goto out;
 375         }
 376
 377         return 0;
 378
 379 out:
 380         platform_driver_unregister(&exynos_drm_platform_driver);
 381
 382 out_drm:
 383 #ifdef CONFIG_DRM_EXYNOS_G2D
 384         platform_driver_unregister(&g2d_driver);
 385 out_g2d:
 386 #endif
 387
 388 #ifdef CONFIG_DRM_EXYNOS_VIDI
 389         platform_driver_unregister(&vidi_driver);
 390 out_vidi:
 391 #endif
 392
 393 #ifdef CONFIG_DRM_EXYNOS_HDMI
 394         exynos_platform_device_hdmi_unregister();
 395 out_common_hdmi_dev:
 396         platform_driver_unregister(&exynos_drm_common_hdmi_driver);
 397 out_common_hdmi:
 398         platform_driver_unregister(&mixer_driver);
 399 out_mixer:
 400         platform_driver_unregister(&hdmi_driver);
 401 out_hdmi:
 402 #endif
 403
 404 #ifdef CONFIG_DRM_EXYNOS_FIMD
 405         platform_driver_unregister(&fimd_driver);
 406 out_fimd:
 407 #endif
 408         return ret;
 409 }
 410
 411 static void __exit exynos_drm_exit(void)
 412 {
 413         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 414
 415         platform_device_unregister(exynos_drm_pdev);
 416
 417         platform_driver_unregister(&exynos_drm_platform_driver);
 418
 419 #ifdef CONFIG_DRM_EXYNOS_G2D
 420         platform_driver_unregister(&g2d_driver);
 421 #endif
 422
 423 #ifdef CONFIG_DRM_EXYNOS_HDMI
 424         exynos_platform_device_hdmi_unregister();
 425         platform_driver_unregister(&exynos_drm_common_hdmi_driver);
 426         platform_driver_unregister(&mixer_driver);
 427         platform_driver_unregister(&hdmi_driver);
 428 #endif
 429
 430 #ifdef CONFIG_DRM_EXYNOS_VIDI
 431         platform_driver_unregister(&vidi_driver);
 432 #endif
 433
 434 #ifdef CONFIG_DRM_EXYNOS_FIMD
 435         platform_driver_unregister(&fimd_driver);
 436 #endif
 437 }
 438
 439 module_init(exynos_drm_init);
 440 module_exit(exynos_drm_exit);
 441
 442 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 443 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 444 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 445 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 446 MODULE_LICENSE("GPL");