[Intel-gfx] [PATCH 6/6] drm/i915: Register color correction capabilities

[Lionel Landwerlin]

From: Shashank Sharma <shashank.sharma at intel.com>

Register cm_coeff_after_ctm_property & cm_coeff_before_ctm_property
indicating the size of the LUT to be supplied to palette_after_ctm &
palette_before_ctm and also register the ctm property to enable color
correction matrix.

Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
Signed-off-by: Kausal Malladi <kausalmalladi at gmail.com>
---
 drivers/gpu/drm/i915/intel_color_manager.c | 53 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_display.c       |  1 +
 2 files changed, 54 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_color_manager.c b/drivers/gpu/drm/i915/intel_color_manager.c
index bca07c1..b50665b 100644
--- a/drivers/gpu/drm/i915/intel_color_manager.c
+++ b/drivers/gpu/drm/i915/intel_color_manager.c
@@ -801,4 +801,57 @@ void intel_color_manager_commit(struct drm_device *dev,
 
 void intel_crtc_attach_color_properties(struct drm_crtc *crtc)
 {
+	struct drm_device *dev = crtc->dev;
+	struct drm_mode_config *config = &dev->mode_config;
+	struct drm_mode_object *mode_obj = &crtc->base;
+
+	/*
+	* Register:
+	* =========
+	* Gamma correction as palette_after_ctm property
+	* Degamma correction as palette_before_ctm property
+	*
+	* Load:
+	* =====
+	* no. of coefficients supported on this platform for gamma
+	* and degamma with the query properties. A user
+	* space agent should read these query property, and prepare
+	* the color correction values accordingly. Its expected from the
+	* driver to load the right number of coefficients during the init
+	* phase.
+	*/
+	if (config->cm_coeff_after_ctm_property) {
+		drm_object_attach_property(mode_obj,
+			config->cm_coeff_after_ctm_property,
+		INTEL_INFO(dev)->num_samples_after_ctm);
+		DRM_DEBUG_DRIVER("Gamma query property initialized\n");
+	}
+
+	if (config->cm_coeff_before_ctm_property) {
+		drm_object_attach_property(mode_obj,
+			config->cm_coeff_before_ctm_property,
+		INTEL_INFO(dev)->num_samples_before_ctm);
+		DRM_DEBUG_DRIVER("Degamma query property initialized\n");
+	}
+
+	/* Gamma correction */
+	if (config->cm_palette_after_ctm_property) {
+		drm_object_attach_property(mode_obj,
+			config->cm_palette_after_ctm_property, 0);
+		DRM_DEBUG_DRIVER("gamma property attached to CRTC\n");
+	}
+
+	/* Degamma correction */
+	if (config->cm_palette_before_ctm_property) {
+		drm_object_attach_property(mode_obj,
+			config->cm_palette_before_ctm_property, 0);
+		DRM_DEBUG_DRIVER("degamma property attached to CRTC\n");
+	}
+
+	/* CSC */
+	if (config->cm_ctm_property) {
+		drm_object_attach_property(mode_obj,
+			config->cm_ctm_property, 0);
+		DRM_DEBUG_DRIVER("CSC property attached to CRTC\n");
+	}
 }
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index b9eb507..7cf56cb 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14264,6 +14264,7 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
 	intel_crtc->cursor_size = ~0;
 
 	intel_crtc->wm.cxsr_allowed = true;
+	intel_crtc_attach_color_properties(&intel_crtc->base);
 
 	BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
 	       dev_priv->plane_to_crtc_mapping[intel_crtc->plane] != NULL);
-- 
2.6.3