release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/gpu/drm/nouveau/nouveau_display.c

   1 /*
   2  * Copyright (C) 2008 Maarten Maathuis.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "drmP.h"
  28 #include "drm_crtc_helper.h"
  29 #include "nouveau_drv.h"
  30 #include "nouveau_fb.h"
  31 #include "nouveau_fbcon.h"
  32
  33 static void
  34 nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
  35 {
  36         struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
  37
  38         if (fb->nvbo)
  39                 drm_gem_object_unreference_unlocked(fb->nvbo->gem);
  40
  41         drm_framebuffer_cleanup(drm_fb);
  42         kfree(fb);
  43 }
  44
  45 static int
  46 nouveau_user_framebuffer_create_handle(struct drm_framebuffer *drm_fb,
  47                                        struct drm_file *file_priv,
  48                                        unsigned int *handle)
  49 {
  50         struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
  51
  52         return drm_gem_handle_create(file_priv, fb->nvbo->gem, handle);
  53 }
  54
  55 static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
  56         .destroy = nouveau_user_framebuffer_destroy,
  57         .create_handle = nouveau_user_framebuffer_create_handle,
  58 };
  59
  60 int
  61 nouveau_framebuffer_init(struct drm_device *dev, struct nouveau_framebuffer *nouveau_fb,
  62                          struct drm_mode_fb_cmd *mode_cmd, struct nouveau_bo *nvbo)
  63 {
  64         int ret;
  65
  66         ret = drm_framebuffer_init(dev, &nouveau_fb->base, &nouveau_framebuffer_funcs);
  67         if (ret) {
  68                 return ret;
  69         }
  70
  71         drm_helper_mode_fill_fb_struct(&nouveau_fb->base, mode_cmd);
  72         nouveau_fb->nvbo = nvbo;
  73         return 0;
  74 }
  75
  76 static struct drm_framebuffer *
  77 nouveau_user_framebuffer_create(struct drm_device *dev,
  78                                 struct drm_file *file_priv,
  79                                 struct drm_mode_fb_cmd *mode_cmd)
  80 {
  81         struct nouveau_framebuffer *nouveau_fb;
  82         struct drm_gem_object *gem;
  83         int ret;
  84
  85         gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
  86         if (!gem)
  87                 return ERR_PTR(-ENOENT);
  88
  89         nouveau_fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL);
  90         if (!nouveau_fb)
  91                 return ERR_PTR(-ENOMEM);
  92
  93         ret = nouveau_framebuffer_init(dev, nouveau_fb, mode_cmd, nouveau_gem_object(gem));
  94         if (ret) {
  95                 drm_gem_object_unreference(gem);
  96                 return ERR_PTR(ret);
  97         }
  98
  99         return &nouveau_fb->base;
 100 }
 101
 102 const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
 103         .fb_create = nouveau_user_framebuffer_create,
 104         .output_poll_changed = nouveau_fbcon_output_poll_changed,
 105 };