Commit 8f8f6a6c authored by Ville Syrjälä's avatar Ville Syrjälä

drm: Add drm_framebuffer_plane_{width,height}()

Add variants of drm_format_plane_{width,height}() that take an entire fb
object instead of just the format. These should be more efficent as they
can just look up the format info from the fb->format pointer rather than
having to look it up (using a linear search based on the format).
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1479498793-31021-30-git-send-email-ville.syrjala@linux.intel.com
parent 801c8fe8
...@@ -793,3 +793,47 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb) ...@@ -793,3 +793,47 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
drm_framebuffer_unreference(fb); drm_framebuffer_unreference(fb);
} }
EXPORT_SYMBOL(drm_framebuffer_remove); EXPORT_SYMBOL(drm_framebuffer_remove);
/**
* drm_framebuffer_plane_width - width of the plane given the first plane
* @width: width of the first plane
* @fb: the framebuffer
* @plane: plane index
*
* Returns:
* The width of @plane, given that the width of the first plane is @width.
*/
int drm_framebuffer_plane_width(int width,
const struct drm_framebuffer *fb, int plane)
{
if (plane >= fb->format->num_planes)
return 0;
if (plane == 0)
return width;
return width / fb->format->hsub;
}
EXPORT_SYMBOL(drm_framebuffer_plane_width);
/**
* drm_framebuffer_plane_height - height of the plane given the first plane
* @height: height of the first plane
* @fb: the framebuffer
* @plane: plane index
*
* Returns:
* The height of @plane, given that the height of the first plane is @height.
*/
int drm_framebuffer_plane_height(int height,
const struct drm_framebuffer *fb, int plane)
{
if (plane >= fb->format->num_planes)
return 0;
if (plane == 0)
return height;
return height / fb->format->vsub;
}
EXPORT_SYMBOL(drm_framebuffer_plane_height);
...@@ -286,4 +286,10 @@ static inline void drm_framebuffer_assign(struct drm_framebuffer **p, ...@@ -286,4 +286,10 @@ static inline void drm_framebuffer_assign(struct drm_framebuffer **p,
struct drm_framebuffer, head); \ struct drm_framebuffer, head); \
&fb->head != (&(dev)->mode_config.fb_list); \ &fb->head != (&(dev)->mode_config.fb_list); \
fb = list_next_entry(fb, head)) fb = list_next_entry(fb, head))
int drm_framebuffer_plane_width(int width,
const struct drm_framebuffer *fb, int plane);
int drm_framebuffer_plane_height(int height,
const struct drm_framebuffer *fb, int plane);
#endif #endif
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