[v7 05/16] drm: Define helper function for plane color enabling

[Uma Shankar]

Define helper function to enable Plane color features
to attach plane color properties to plane structure.

v2: Rebase

v3: Modiefied the function to use updated property names.

v4: Rebase

v5: Moved helper function to drm_color_mgmt.c file to have all
color operations consolidated at one place. No logical change.

Signed-off-by: Uma Shankar <uma.shankar at intel.com>
Reviewed-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe at arm.com>
---
 drivers/gpu/drm/drm_color_mgmt.c | 42 ++++++++++++++++++++++++++++++++++++++++
 include/drm/drm_color_mgmt.h     |  5 +++++
 2 files changed, 47 insertions(+)

diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c
index f168609..9cedd27 100644
--- a/drivers/gpu/drm/drm_color_mgmt.c
+++ b/drivers/gpu/drm/drm_color_mgmt.c
@@ -484,6 +484,48 @@ int drm_plane_create_color_properties(struct drm_plane *plane,
 EXPORT_SYMBOL(drm_plane_create_color_properties);
 
 /**
+ * drm_plane_enable_color_mgmt - enable color management properties
+ * @plane: DRM Plane
+ * @plane_degamma_lut_size: the size of the degamma lut (before CSC)
+ * @plane_has_ctm: whether to attach ctm_property for CSC matrix
+ * @plane_gamma_lut_size: the size of the gamma lut (after CSC)
+ *
+ * This function lets the driver enable the color correction
+ * properties on a plane. This includes 3 degamma, csc and gamma
+ * properties that userspace can set and 2 size properties to inform
+ * the userspace of the lut sizes. Each of the properties are
+ * optional. The gamma and degamma properties are only attached if
+ * their size is not 0 and ctm_property is only attached if has_ctm is
+ * true.
+ */
+void drm_plane_enable_color_mgmt(struct drm_plane *plane,
+				 u32 plane_degamma_lut_size,
+				 bool plane_has_ctm,
+				 u32 plane_gamma_lut_size)
+{
+	if (plane_degamma_lut_size) {
+		drm_object_attach_property(&plane->base,
+					   plane->degamma_lut_property, 0);
+		drm_object_attach_property(&plane->base,
+					   plane->degamma_lut_size_property,
+					   plane_degamma_lut_size);
+	}
+
+	if (plane_has_ctm)
+		drm_object_attach_property(&plane->base,
+					   plane->ctm_property, 0);
+
+	if (plane_gamma_lut_size) {
+		drm_object_attach_property(&plane->base,
+					   plane->gamma_lut_property, 0);
+		drm_object_attach_property(&plane->base,
+					   plane->gamma_lut_size_property,
+					   plane_gamma_lut_size);
+	}
+}
+EXPORT_SYMBOL(drm_plane_enable_color_mgmt);
+
+/**
  * DOC: Plane Color Properties
  *
  * Plane Color management or color space adjustments is supported
diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h
index c9d2746..8726cee 100644
--- a/include/drm/drm_color_mgmt.h
+++ b/include/drm/drm_color_mgmt.h
@@ -71,6 +71,11 @@ int drm_plane_create_color_properties(struct drm_plane *plane,
 				      enum drm_color_encoding default_encoding,
 				      enum drm_color_range default_range);
 
+void drm_plane_enable_color_mgmt(struct drm_plane *plane,
+				 u32 plane_degamma_lut_size,
+				 bool plane_has_ctm,
+				 u32 plane_gamma_lut_size);
+
 /**
  * enum drm_color_lut_tests - hw-specific LUT tests to perform
  *
-- 
1.9.1