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 "drmP.h"
  29 #include "drm.h"
  30 #include "drm_crtc_helper.h"
  31
  32 #include <drm/exynos_drm.h>
  33
  34 #include "exynos_drm_drv.h"
  35 #include "exynos_drm_crtc.h"
  36 #include "exynos_drm_encoder.h"
  37 #include "exynos_drm_fbdev.h"
  38 #include "exynos_drm_fb.h"
  39 #include "exynos_drm_gem.h"
  40 #include "exynos_drm_plane.h"
  41 #include "exynos_drm_vidi.h"
  42 #include "exynos_drm_dmabuf.h"
  43
  44 #define DRIVER_NAME     "exynos"
  45 #define DRIVER_DESC     "Samsung SoC DRM"
  46 #define DRIVER_DATE     "20110530"
  47 #define DRIVER_MAJOR    1
  48 #define DRIVER_MINOR    0
  49
  50 #define VBLANK_OFF_DELAY        50000
  51
  52 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
  53 {
  54         struct exynos_drm_private *private;
  55         int ret;
  56         int nr;
  57
  58         DRM_DEBUG_DRIVER("%s\n", __FILE__);
  59
  60         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
  61         if (!private) {
  62                 DRM_ERROR("failed to allocate private\n");
  63                 return -ENOMEM;
  64         }
  65
  66 #ifdef CONFIG_DMA_SHARED_BUFFER_USES_KDS
  67         if (kds_callback_init(&private->kds_cb, 1,
  68                               exynos_drm_kds_callback) < 0) {
  69                 DRM_ERROR("kds alloc queue failed.\n");
  70                 ret = -ENOMEM;
  71                 goto err_kds;
  72         }
  73         if (kds_callback_init(&private->kds_cb_rm_fb, 0,
  74                               exynos_drm_kds_callback_rm_fb) < 0) {
  75                 DRM_ERROR("kds alloc queue failed.\n");
  76                 ret = -ENOMEM;
  77                 goto err_kds_rm_fb;
  78         }
  79 #endif
  80
  81         DRM_INIT_WAITQUEUE(&private->wait_vsync_queue);
  82         atomic_set(&private->wait_vsync_event, 0);
  83
  84         dev->dev_private = (void *)private;
  85
  86         drm_mode_config_init(dev);
  87
  88         /* init kms poll for handling hpd */
  89         drm_kms_helper_poll_init(dev);
  90
  91         exynos_drm_mode_config_init(dev);
  92
  93         /*
  94          * EXYNOS4 is enough to have two CRTCs and each crtc would be used
  95          * without dependency of hardware.
  96          */
  97         for (nr = 0; nr < MAX_CRTC; nr++) {
  98                 ret = exynos_drm_crtc_create(dev, nr);
  99                 if (ret)
 100                         goto err_crtc;
 101         }
 102
 103         for (nr = 0; nr < MAX_PLANE; nr++) {
 104                 ret = exynos_plane_init(dev, nr);
 105                 if (ret)
 106                         goto err_crtc;
 107         }
 108
 109         ret = drm_vblank_init(dev, MAX_CRTC);
 110         if (ret)
 111                 goto err_crtc;
 112
 113         /*
 114          * probe sub drivers such as display controller and hdmi driver,
 115          * that were registered at probe() of platform driver
 116          * to the sub driver and create encoder and connector for them.
 117          */
 118         ret = exynos_drm_device_register(dev);
 119         if (ret)
 120                 goto err_vblank;
 121
 122         /* setup possible_clones. */
 123         exynos_drm_encoder_setup(dev);
 124
 125         /*
 126          * create and configure fb helper and also exynos specific
 127          * fbdev object.
 128          */
 129         ret = exynos_drm_fbdev_init(dev);
 130         if (ret) {
 131                 DRM_ERROR("failed to initialize drm fbdev\n");
 132                 goto err_drm_device;
 133         }
 134
 135         drm_vblank_offdelay = VBLANK_OFF_DELAY;
 136
 137         return 0;
 138
 139 err_drm_device:
 140         exynos_drm_device_unregister(dev);
 141 err_vblank:
 142         drm_vblank_cleanup(dev);
 143 err_crtc:
 144         drm_mode_config_cleanup(dev);
 145 #ifdef CONFIG_DMA_SHARED_BUFFER_USES_KDS
 146         kds_callback_term(&private->kds_cb_rm_fb);
 147 err_kds_rm_fb:
 148         kds_callback_term(&private->kds_cb);
 149 err_kds:
 150 #endif
 151         kfree(private);
 152
 153         return ret;
 154 }
 155
 156 static int exynos_drm_unload(struct drm_device *dev)
 157 {
 158         struct exynos_drm_private *private = dev->dev_private;
 159
 160         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 161
 162         exynos_drm_fbdev_fini(dev);
 163         exynos_drm_device_unregister(dev);
 164         drm_vblank_cleanup(dev);
 165         drm_kms_helper_poll_fini(dev);
 166         drm_mode_config_cleanup(dev);
 167 #ifdef CONFIG_DMA_SHARED_BUFFER_USES_KDS
 168         kds_callback_term(&private->kds_cb);
 169 #endif
 170         kfree(private);
 171
 172         dev->dev_private = NULL;
 173
 174         return 0;
 175 }
 176
 177 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 178 {
 179         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 180
 181         return exynos_drm_subdrv_open(dev, file);
 182 }
 183
 184 static void exynos_drm_preclose(struct drm_device *dev,
 185                                         struct drm_file *file)
 186 {
 187         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 188
 189         exynos_drm_subdrv_close(dev, file);
 190 }
 191
 192 static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
 193 {
 194         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 195
 196         if (!file->driver_priv)
 197                 return;
 198
 199         kfree(file->driver_priv);
 200         file->driver_priv = NULL;
 201 }
 202
 203 static void exynos_drm_lastclose(struct drm_device *dev)
 204 {
 205         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 206
 207         exynos_drm_fbdev_restore_mode(dev);
 208 }
 209
 210 static struct vm_operations_struct exynos_drm_gem_vm_ops = {
 211         .fault = exynos_drm_gem_fault,
 212         .open = drm_gem_vm_open,
 213         .close = drm_gem_vm_close,
 214 };
 215
 216 static struct drm_ioctl_desc exynos_ioctls[] = {
 217         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 218                         DRM_UNLOCKED | DRM_AUTH),
 219         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP_OFFSET,
 220                         exynos_drm_gem_map_offset_ioctl, DRM_UNLOCKED |
 221                         DRM_AUTH),
 222         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
 223                         exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
 224         DRM_IOCTL_DEF_DRV(EXYNOS_PLANE_SET_ZPOS, exynos_plane_set_zpos_ioctl,
 225                         DRM_UNLOCKED | DRM_AUTH),
 226         DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,
 227                         vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH),
 228 };
 229
 230 static const struct file_operations exynos_drm_driver_fops = {
 231         .owner          = THIS_MODULE,
 232         .open           = drm_open,
 233         .mmap           = exynos_drm_gem_mmap,
 234         .poll           = drm_poll,
 235         .read           = drm_read,
 236         .unlocked_ioctl = drm_ioctl,
 237         .release        = drm_release,
 238 };
 239
 240 static struct drm_driver exynos_drm_driver = {
 241         .driver_features        = DRIVER_HAVE_IRQ | DRIVER_BUS_PLATFORM |
 242                                   DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
 243         .load                   = exynos_drm_load,
 244         .unload                 = exynos_drm_unload,
 245         .open                   = exynos_drm_open,
 246         .preclose               = exynos_drm_preclose,
 247         .lastclose              = exynos_drm_lastclose,
 248         .postclose              = exynos_drm_postclose,
 249         .get_vblank_counter     = drm_vblank_count,
 250         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 251         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 252         .gem_init_object        = exynos_drm_gem_init_object,
 253         .gem_free_object        = exynos_drm_gem_free_object,
 254         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 255         .dumb_create            = exynos_drm_gem_dumb_create,
 256         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 257         .dumb_destroy           = exynos_drm_gem_dumb_destroy,
 258         .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
 259         .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
 260         .gem_prime_export       = exynos_dmabuf_prime_export,
 261         .gem_prime_import       = exynos_dmabuf_prime_import,
 262         .ioctls                 = exynos_ioctls,
 263         .fops                   = &exynos_drm_driver_fops,
 264         .name   = DRIVER_NAME,
 265         .desc   = DRIVER_DESC,
 266         .date   = DRIVER_DATE,
 267         .major  = DRIVER_MAJOR,
 268         .minor  = DRIVER_MINOR,
 269 };
 270
 271 #ifdef CONFIG_EXYNOS_IOMMU
 272 static int iommu_init(struct platform_device *pdev)
 273 {
 274         /* DRM device expects a IOMMU mapping to be already
 275          * created in FIMD. Else this function should
 276          * throw an error.
 277          */
 278         if (exynos_drm_common_mapping==NULL) {
 279                 printk(KERN_ERR "exynos drm common mapping is invalid\n");
 280                 return -1;
 281         }
 282
 283         /*
 284          * The ordering in Makefile warrants that this is initialized after
 285          * FIMD, so only just ensure that it works as expected and we are
 286          * reusing the mapping originally created in exynos_drm_fimd.c.
 287          */
 288         WARN_ON(!exynos_drm_common_mapping);
 289         if (!s5p_create_iommu_mapping(&pdev->dev, 0,
 290                                 0, 0, exynos_drm_common_mapping)) {
 291                 printk(KERN_ERR "failed to create IOMMU mapping\n");
 292                 return -1;
 293         }
 294
 295         return 0;
 296 }
 297
 298 static void iommu_deinit(struct platform_device *pdev)
 299 {
 300         /* detach the device and mapping */
 301         s5p_destroy_iommu_mapping(&pdev->dev);
 302         DRM_DEBUG("released the IOMMU mapping\n");
 303
 304         return;
 305 }
 306 #endif
 307
 308 static int exynos_drm_platform_probe(struct platform_device *pdev)
 309 {
 310         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 311
 312 #ifdef CONFIG_EXYNOS_IOMMU
 313         if (iommu_init(pdev)) {
 314                 DRM_ERROR("failed to initialize IOMMU\n");
 315                 return -ENODEV;
 316         }
 317 #endif
 318
 319         exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);
 320
 321         return drm_platform_init(&exynos_drm_driver, pdev);
 322 }
 323
 324 static int __devexit exynos_drm_platform_remove(struct platform_device *pdev)
 325 {
 326         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 327
 328         drm_platform_exit(&exynos_drm_driver, pdev);
 329
 330 #ifdef CONFIG_EXYNOS_IOMMU
 331         iommu_deinit(pdev);
 332 #endif
 333         return 0;
 334 }
 335
 336 static struct platform_driver exynos_drm_platform_driver = {
 337         .probe          = exynos_drm_platform_probe,
 338         .remove         = __devexit_p(exynos_drm_platform_remove),
 339         .driver         = {
 340                 .owner  = THIS_MODULE,
 341                 .name   = "exynos-drm",
 342         },
 343 };
 344
 345 static int __init exynos_drm_init(void)
 346 {
 347         int ret;
 348
 349         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 350
 351 #ifdef CONFIG_DRM_EXYNOS_FIMD
 352         ret = platform_driver_register(&fimd_driver);
 353         if (ret < 0)
 354                 goto out_fimd;
 355 #endif
 356
 357 #ifdef CONFIG_DRM_EXYNOS_DP
 358         ret = platform_driver_register(&dp_driver);
 359         if (ret < 0)
 360                 goto out_dp_driver;
 361 #endif
 362
 363 #ifdef CONFIG_DRM_EXYNOS_HDMI
 364         ret = platform_driver_register(&hdmi_driver);
 365         if (ret < 0)
 366                 goto out_hdmi;
 367         ret = platform_driver_register(&mixer_driver);
 368         if (ret < 0)
 369                 goto out_mixer;
 370         ret = platform_driver_register(&exynos_drm_common_hdmi_driver);
 371         if (ret < 0)
 372                 goto out_common_hdmi;
 373 #endif
 374
 375 #ifdef CONFIG_DRM_EXYNOS_VIDI
 376         ret = platform_driver_register(&vidi_driver);
 377         if (ret < 0)
 378                 goto out_vidi;
 379 #endif
 380
 381         ret = platform_driver_register(&exynos_drm_platform_driver);
 382         if (ret < 0)
 383                 goto out;
 384
 385         return 0;
 386
 387 out:
 388 #ifdef CONFIG_DRM_EXYNOS_VIDI
 389 out_vidi:
 390         platform_driver_unregister(&vidi_driver);
 391 #endif
 392
 393 #ifdef CONFIG_DRM_EXYNOS_HDMI
 394         platform_driver_unregister(&exynos_drm_common_hdmi_driver);
 395 out_common_hdmi:
 396         platform_driver_unregister(&mixer_driver);
 397 out_mixer:
 398         platform_driver_unregister(&hdmi_driver);
 399 out_hdmi:
 400 #endif
 401
 402         platform_driver_unregister(&dp_driver);
 403 out_dp_driver:
 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_driver_unregister(&exynos_drm_platform_driver);
 416
 417 #ifdef CONFIG_DRM_EXYNOS_HDMI
 418         platform_driver_unregister(&exynos_drm_common_hdmi_driver);
 419         platform_driver_unregister(&mixer_driver);
 420         platform_driver_unregister(&hdmi_driver);
 421 #endif
 422
 423 #ifdef CONFIG_DRM_EXYNOS_VIDI
 424         platform_driver_unregister(&vidi_driver);
 425 #endif
 426
 427         platform_driver_unregister(&dp_driver);
 428 #ifdef CONFIG_DRM_EXYNOS_FIMD
 429         platform_driver_unregister(&fimd_driver);
 430 #endif
 431 }
 432
 433 module_init(exynos_drm_init);
 434 module_exit(exynos_drm_exit);
 435
 436 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 437 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 438 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 439 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 440 MODULE_LICENSE("GPL");