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Commit 41204dfe authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm: Introduce drm_color_lut_size() 



Provide a small helper to convert the blob length in bytes
to the number of LUT entries.

v2: Add kerneldoc (Daniel)

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20180315152338.7248-1-ville.syrjala@linux.intel.com
parent d2a24edb

include/drm/drm_color_mgmt.h

+12 −0
Original line number Diff line number Diff line
@@ -38,6 +38,18 @@ void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, 
int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,

				 int gamma_size);



/**

 * drm_color_lut_size - calculate the number of entries in the LUT

 * @blob: blob containing the LUT

 *

 * Returns:

 * The number of entries in the color LUT stored in @blob.

 */

static inline int drm_color_lut_size(const struct drm_property_blob *blob)

{

	return blob->length / sizeof(struct drm_color_lut);

}



enum drm_color_encoding {

	DRM_COLOR_YCBCR_BT601,

	DRM_COLOR_YCBCR_BT709,