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path: root/drivers/gpu/drm/ast/ast_main.c
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Diffstat (limited to 'drivers/gpu/drm/ast/ast_main.c')
-rw-r--r--drivers/gpu/drm/ast/ast_main.c24
1 files changed, 1 insertions, 23 deletions
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index b79f484e9bd2..18a0a4ce00f6 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -388,31 +388,9 @@ static int ast_get_dram_info(struct drm_device *dev)
return 0;
}
-enum drm_mode_status ast_mode_config_mode_valid(struct drm_device *dev,
- const struct drm_display_mode *mode)
-{
- static const unsigned long max_bpp = 4; /* DRM_FORMAT_XRGBA8888 */
-
- struct ast_private *ast = dev->dev_private;
- unsigned long fbsize, fbpages, max_fbpages;
-
- /* To support double buffering, a framebuffer may not
- * consume more than half of the available VRAM.
- */
- max_fbpages = (ast->vram_size / 2) >> PAGE_SHIFT;
-
- fbsize = mode->hdisplay * mode->vdisplay * max_bpp;
- fbpages = DIV_ROUND_UP(fbsize, PAGE_SIZE);
-
- if (fbpages > max_fbpages)
- return MODE_MEM;
-
- return MODE_OK;
-}
-
static const struct drm_mode_config_funcs ast_mode_funcs = {
.fb_create = drm_gem_fb_create,
- .mode_valid = ast_mode_config_mode_valid,
+ .mode_valid = drm_vram_helper_mode_valid,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};