Define helper function to enable Plane color features
to attach plane color properties to plane structure.
Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
drivers/gpu/drm/drm_plane.c | 48 ++++++++++++++++++++++++++++++++++++++++++
include/drm/drm_color_mgmt.h | 5 +++++
2 files changed, 53 insertions(+)
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 72cba98..f327f56 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -144,6 +144,54 @@ static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane
}
/**
+ * 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.
+ *
+ * Drivers should use drm_atomic_helper_legacy_gamma_set() to implement the
+ * legacy &drm_crtc_funcs.gamma_set callback.
+ */
+void drm_plane_enable_color_mgmt(struct drm_plane *plane,
+ uint plane_degamma_lut_size,
+ bool plane_has_ctm,
+ uint plane_gamma_lut_size)
+{
+ struct drm_device *dev = plane->dev;
+ struct drm_mode_config *config = &dev->mode_config;
+
+ if (plane_degamma_lut_size) {
+ drm_object_attach_property(&plane->base,
+ config->plane_degamma_lut_property, 0);
+ drm_object_attach_property(&plane->base,
+ config->plane_degamma_lut_size_property,
+ plane_degamma_lut_size);
+ }
+
+ if (plane_has_ctm)
+ drm_object_attach_property(&plane->base,
+ config->plane_ctm_property, 0);
+
+ if (plane_gamma_lut_size) {
+ drm_object_attach_property(&plane->base,
+ config->plane_gamma_lut_property, 0);
+ drm_object_attach_property(&plane->base,
+ config->plane_gamma_lut_size_property,
+ plane_gamma_lut_size);
+ }
+}
+EXPORT_SYMBOL(drm_plane_enable_color_mgmt);
+
+/**
* drm_universal_plane_init - Initialize a new universal plane object
* @dev: DRM device
* @plane: plane object to init
diff --git a/include/drm/drm_color_mgmt.h b/include/drm/drm_color_mgmt.h
index 03a59cb..155a9ba 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);
+void drm_plane_enable_color_mgmt(struct drm_plane *plane,
+ uint plane_degamma_lut_size,
+ bool plane_has_ctm,
+ uint plane_gamma_lut_size);
+
#endif
--
1.7.9.5
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