[Intel-gfx] [PATCH 4/6] drm: Introduce drm_color_lut_size()

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

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

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 include/drm/drm_color_mgmt.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h
index 03a59cbce621..7ddf4457f3c1 100644
--- a/include/drm/drm_color_mgmt.h
+++ b/include/drm/drm_color_mgmt.h
@@ -37,4 +37,9 @@ void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc,
 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
 				 int gamma_size);
 
+static inline int drm_color_lut_size(const struct drm_property_blob *blob)
+{
+	return blob->length / sizeof(struct drm_color_lut);
+}
+
 #endif
-- 
2.13.6