From: Ville Syrjälä Date: Thu, 15 Mar 2018 15:23:38 +0000 (+0200) Subject: drm: Introduce drm_color_lut_size() X-Git-Tag: v4.17-rc1~185^2~8^2~20 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=41204dfeed93f2c7668cf8aa5086bcd96eccaa35;p=thirdparty%2Flinux.git 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 Signed-off-by: Ville Syrjälä Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20180315152338.7248-1-ville.syrjala@linux.intel.com --- diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h index b3b6d302ca8c0..44f04233e3db6 100644 --- a/include/drm/drm_color_mgmt.h +++ b/include/drm/drm_color_mgmt.h @@ -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,