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
  31 #include <drm/exynos_drm.h>
  32
  33 #include "exynos_drm_drv.h"
  34 #include "exynos_drm_crtc.h"
  35 #include "exynos_drm_fbdev.h"
  36 #include "exynos_drm_fb.h"
  37 #include "exynos_drm_gem.h"
  38
  39 #define DRIVER_NAME     "exynos-drm"
  40 #define DRIVER_DESC     "Samsung SoC DRM"
  41 #define DRIVER_DATE     "20110530"
  42 #define DRIVER_MAJOR    1
  43 #define DRIVER_MINOR    0
  44
  45 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
  46 {
  47         struct exynos_drm_private *private;
  48         int ret;
  49         int nr;
  50
  51         DRM_DEBUG_DRIVER("%s\n", __FILE__);
  52
  53         private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
  54         if (!private) {
  55                 DRM_ERROR("failed to allocate private\n");
  56                 return -ENOMEM;
  57         }
  58
  59         INIT_LIST_HEAD(&private->pageflip_event_list);
  60         dev->dev_private = (void *)private;
  61
  62         drm_mode_config_init(dev);
  63
  64         exynos_drm_mode_config_init(dev);
  65
  66         /*
  67          * EXYNOS4 is enough to have two CRTCs and each crtc would be used
  68          * without dependency of hardware.
  69          */
  70         for (nr = 0; nr < MAX_CRTC; nr++) {
  71                 ret = exynos_drm_crtc_create(dev, nr);
  72                 if (ret)
  73                         goto err_crtc;
  74         }
  75
  76         ret = drm_vblank_init(dev, MAX_CRTC);
  77         if (ret)
  78                 goto err_crtc;
  79
  80         /*
  81          * probe sub drivers such as display controller and hdmi driver,
  82          * that were registered at probe() of platform driver
  83          * to the sub driver and create encoder and connector for them.
  84          */
  85         ret = exynos_drm_device_register(dev);
  86         if (ret)
  87                 goto err_vblank;
  88
  89         /*
  90          * create and configure fb helper and also exynos specific
  91          * fbdev object.
  92          */
  93         ret = exynos_drm_fbdev_init(dev);
  94         if (ret) {
  95                 DRM_ERROR("failed to initialize drm fbdev\n");
  96                 goto err_drm_device;
  97         }
  98
  99         return 0;
 100
 101 err_drm_device:
 102         exynos_drm_device_unregister(dev);
 103 err_vblank:
 104         drm_vblank_cleanup(dev);
 105 err_crtc:
 106         drm_mode_config_cleanup(dev);
 107         kfree(private);
 108
 109         return ret;
 110 }
 111
 112 static int exynos_drm_unload(struct drm_device *dev)
 113 {
 114         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 115
 116         exynos_drm_fbdev_fini(dev);
 117         exynos_drm_device_unregister(dev);
 118         drm_vblank_cleanup(dev);
 119         drm_mode_config_cleanup(dev);
 120         kfree(dev->dev_private);
 121
 122         dev->dev_private = NULL;
 123
 124         return 0;
 125 }
 126
 127 static void exynos_drm_preclose(struct drm_device *dev,
 128                                         struct drm_file *file_priv)
 129 {
 130         struct exynos_drm_private *dev_priv = dev->dev_private;
 131
 132         /*
 133          * drm framework frees all events at release time,
 134          * so private event list should be cleared.
 135          */
 136         if (!list_empty(&dev_priv->pageflip_event_list))
 137                 INIT_LIST_HEAD(&dev_priv->pageflip_event_list);
 138 }
 139
 140 static void exynos_drm_lastclose(struct drm_device *dev)
 141 {
 142         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 143
 144         exynos_drm_fbdev_restore_mode(dev);
 145 }
 146
 147 static struct vm_operations_struct exynos_drm_gem_vm_ops = {
 148         .fault = exynos_drm_gem_fault,
 149         .open = drm_gem_vm_open,
 150         .close = drm_gem_vm_close,
 151 };
 152
 153 static struct drm_ioctl_desc exynos_ioctls[] = {
 154         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
 155                         DRM_UNLOCKED | DRM_AUTH),
 156         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP_OFFSET,
 157                         exynos_drm_gem_map_offset_ioctl, DRM_UNLOCKED |
 158                         DRM_AUTH),
 159         DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
 160                         exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
 161 };
 162
 163 static struct drm_driver exynos_drm_driver = {
 164         .driver_features        = DRIVER_HAVE_IRQ | DRIVER_BUS_PLATFORM |
 165                                   DRIVER_MODESET | DRIVER_GEM,
 166         .load                   = exynos_drm_load,
 167         .unload                 = exynos_drm_unload,
 168         .preclose               = exynos_drm_preclose,
 169         .lastclose              = exynos_drm_lastclose,
 170         .get_vblank_counter     = drm_vblank_count,
 171         .enable_vblank          = exynos_drm_crtc_enable_vblank,
 172         .disable_vblank         = exynos_drm_crtc_disable_vblank,
 173         .gem_init_object        = exynos_drm_gem_init_object,
 174         .gem_free_object        = exynos_drm_gem_free_object,
 175         .gem_vm_ops             = &exynos_drm_gem_vm_ops,
 176         .dumb_create            = exynos_drm_gem_dumb_create,
 177         .dumb_map_offset        = exynos_drm_gem_dumb_map_offset,
 178         .dumb_destroy           = exynos_drm_gem_dumb_destroy,
 179         .ioctls                 = exynos_ioctls,
 180         .fops = {
 181                 .owner          = THIS_MODULE,
 182                 .open           = drm_open,
 183                 .mmap           = exynos_drm_gem_mmap,
 184                 .poll           = drm_poll,
 185                 .read           = drm_read,
 186                 .unlocked_ioctl = drm_ioctl,
 187                 .release        = drm_release,
 188         },
 189         .name   = DRIVER_NAME,
 190         .desc   = DRIVER_DESC,
 191         .date   = DRIVER_DATE,
 192         .major  = DRIVER_MAJOR,
 193         .minor  = DRIVER_MINOR,
 194 };
 195
 196 static int exynos_drm_platform_probe(struct platform_device *pdev)
 197 {
 198         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 199
 200         exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);
 201
 202         return drm_platform_init(&exynos_drm_driver, pdev);
 203 }
 204
 205 static int exynos_drm_platform_remove(struct platform_device *pdev)
 206 {
 207         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 208
 209         drm_platform_exit(&exynos_drm_driver, pdev);
 210
 211         return 0;
 212 }
 213
 214 static struct platform_driver exynos_drm_platform_driver = {
 215         .probe          = exynos_drm_platform_probe,
 216         .remove         = __devexit_p(exynos_drm_platform_remove),
 217         .driver         = {
 218                 .owner  = THIS_MODULE,
 219                 .name   = DRIVER_NAME,
 220         },
 221 };
 222
 223 static int __init exynos_drm_init(void)
 224 {
 225         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 226
 227         return platform_driver_register(&exynos_drm_platform_driver);
 228 }
 229
 230 static void __exit exynos_drm_exit(void)
 231 {
 232         DRM_DEBUG_DRIVER("%s\n", __FILE__);
 233
 234         platform_driver_unregister(&exynos_drm_platform_driver);
 235 }
 236
 237 module_init(exynos_drm_init);
 238 module_exit(exynos_drm_exit);
 239
 240 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 241 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 242 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 243 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
 244 MODULE_LICENSE("GPL");