drivers/gpu/drm/exynos/exynos_drm_fb.c

   1 /* exynos_drm_fb.c
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  * Authors:
   5  *      Inki Dae <inki.dae@samsung.com>
   6  *      Joonyoung Shim <jy0922.shim@samsung.com>
   7  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the next
  17  * paragraph) shall be included in all copies or substantial portions of the
  18  * Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  24  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  25  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  26  * OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include "drmP.h"
  30 #include "drm_crtc.h"
  31 #include "drm_crtc_helper.h"
  32 #include "drm_fb_helper.h"
  33
  34 #include "exynos_drm_drv.h"
  35 #include "exynos_drm_fb.h"
  36 #include "exynos_drm_gem.h"
  37
  38 #define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
  39
  40 /*
  41  * exynos specific framebuffer structure.
  42  *
  43  * @fb: drm framebuffer obejct.
  44  * @exynos_gem_obj: array of exynos specific gem object containing a gem object.
  45  */
  46 struct exynos_drm_fb {
  47         struct drm_framebuffer          fb;
  48         struct exynos_drm_gem_obj       *exynos_gem_obj[MAX_FB_BUFFER];
  49 };
  50
  51 static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
  52 {
  53         struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
  54
  55         DRM_DEBUG_KMS("%s\n", __FILE__);
  56
  57         drm_framebuffer_cleanup(fb);
  58
  59         kfree(exynos_fb);
  60         exynos_fb = NULL;
  61 }
  62
  63 static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
  64                                         struct drm_file *file_priv,
  65                                         unsigned int *handle)
  66 {
  67         struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
  68
  69         DRM_DEBUG_KMS("%s\n", __FILE__);
  70
  71         return drm_gem_handle_create(file_priv,
  72                         &exynos_fb->exynos_gem_obj[0]->base, handle);
  73 }
  74
  75 static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
  76                                 struct drm_file *file_priv, unsigned flags,
  77                                 unsigned color, struct drm_clip_rect *clips,
  78                                 unsigned num_clips)
  79 {
  80         DRM_DEBUG_KMS("%s\n", __FILE__);
  81
  82         /* TODO */
  83
  84         return 0;
  85 }
  86
  87 static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
  88         .destroy        = exynos_drm_fb_destroy,
  89         .create_handle  = exynos_drm_fb_create_handle,
  90         .dirty          = exynos_drm_fb_dirty,
  91 };
  92
  93 struct drm_framebuffer *
  94 exynos_drm_framebuffer_init(struct drm_device *dev,
  95                             struct drm_mode_fb_cmd2 *mode_cmd,
  96                             struct drm_gem_object *obj)
  97 {
  98         struct exynos_drm_fb *exynos_fb;
  99         int ret;
 100
 101         exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
 102         if (!exynos_fb) {
 103                 DRM_ERROR("failed to allocate exynos drm framebuffer\n");
 104                 return ERR_PTR(-ENOMEM);
 105         }
 106
 107         ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
 108         if (ret) {
 109                 DRM_ERROR("failed to initialize framebuffer\n");
 110                 return ERR_PTR(ret);
 111         }
 112
 113         drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
 114         exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj);
 115
 116         return &exynos_fb->fb;
 117 }
 118
 119 static struct drm_framebuffer *
 120 exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
 121                       struct drm_mode_fb_cmd2 *mode_cmd)
 122 {
 123         struct drm_gem_object *obj;
 124         struct drm_framebuffer *fb;
 125         struct exynos_drm_fb *exynos_fb;
 126         int nr;
 127         int i;
 128
 129         DRM_DEBUG_KMS("%s\n", __FILE__);
 130
 131         obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
 132         if (!obj) {
 133                 DRM_ERROR("failed to lookup gem object\n");
 134                 return ERR_PTR(-ENOENT);
 135         }
 136
 137         drm_gem_object_unreference_unlocked(obj);
 138
 139         fb = exynos_drm_framebuffer_init(dev, mode_cmd, obj);
 140         if (IS_ERR(fb))
 141                 return fb;
 142
 143         exynos_fb = to_exynos_fb(fb);
 144         nr = exynos_drm_format_num_buffers(fb->pixel_format);
 145
 146         for (i = 1; i < nr; i++) {
 147                 obj = drm_gem_object_lookup(dev, file_priv,
 148                                 mode_cmd->handles[i]);
 149                 if (!obj) {
 150                         DRM_ERROR("failed to lookup gem object\n");
 151                         exynos_drm_fb_destroy(fb);
 152                         return ERR_PTR(-ENOENT);
 153                 }
 154
 155                 drm_gem_object_unreference_unlocked(obj);
 156
 157                 exynos_fb->exynos_gem_obj[i] = to_exynos_gem_obj(obj);
 158         }
 159
 160         return fb;
 161 }
 162
 163 struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb,
 164                                                 int index)
 165 {
 166         struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
 167         struct exynos_drm_gem_buf *buffer;
 168
 169         DRM_DEBUG_KMS("%s\n", __FILE__);
 170
 171         if (index >= MAX_FB_BUFFER)
 172                 return NULL;
 173
 174         buffer = exynos_fb->exynos_gem_obj[index]->buffer;
 175         if (!buffer)
 176                 return NULL;
 177
 178         DRM_DEBUG_KMS("vaddr = 0x%lx, dma_addr = 0x%lx\n",
 179                         (unsigned long)buffer->kvaddr,
 180                         (unsigned long)buffer->dma_addr);
 181
 182         return buffer;
 183 }
 184
 185 static void exynos_drm_output_poll_changed(struct drm_device *dev)
 186 {
 187         struct exynos_drm_private *private = dev->dev_private;
 188         struct drm_fb_helper *fb_helper = private->fb_helper;
 189
 190         if (fb_helper)
 191                 drm_fb_helper_hotplug_event(fb_helper);
 192 }
 193
 194 static struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
 195         .fb_create = exynos_user_fb_create,
 196         .output_poll_changed = exynos_drm_output_poll_changed,
 197 };
 198
 199 void exynos_drm_mode_config_init(struct drm_device *dev)
 200 {
 201         dev->mode_config.min_width = 0;
 202         dev->mode_config.min_height = 0;
 203
 204         /*
 205          * set max width and height as default value(4096x4096).
 206          * this value would be used to check framebuffer size limitation
 207          * at drm_mode_addfb().
 208          */
 209         dev->mode_config.max_width = 4096;
 210         dev->mode_config.max_height = 4096;
 211
 212         dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
 213 }
 214
 215 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 216 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 217 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 218 MODULE_DESCRIPTION("Samsung SoC DRM FB Driver");
 219 MODULE_LICENSE("GPL");