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