[PATCH 12/16] drm/i915: Add set_property handler for pipe deGamma correction on CHV/BSW

[Kausal Malladi]

This patch adds set_property handler for deGamma color correction and
enhancement capability at Pipe level on CHV/BSW platform. The set
function just attaches the deGamma blob to CRTC state, that later gets
committed using atomic path.

Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
Signed-off-by: Kausal Malladi <Kausal.Malladi at intel.com>
---
 drivers/gpu/drm/i915/intel_atomic.c        |  3 +++
 drivers/gpu/drm/i915/intel_color_manager.c | 19 +++++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h           |  3 +++
 3 files changed, 25 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
index 72d6b37..c74ca31 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -476,6 +476,9 @@ int intel_crtc_atomic_set_property(struct drm_crtc *crtc,
 	struct drm_device *dev = crtc->dev;
 	struct drm_mode_config *config = &dev->mode_config;
 
+	if (property == config->prop_palette_before_ctm)
+		return intel_color_manager_set_pipe_degamma(dev, state,
+				&crtc->base, val);
 	if (property == config->prop_palette_after_ctm)
 		return intel_color_manager_set_pipe_gamma(dev, state,
 				&crtc->base, val);
diff --git a/drivers/gpu/drm/i915/intel_color_manager.c b/drivers/gpu/drm/i915/intel_color_manager.c
index 7e9e934..908b7ed 100644
--- a/drivers/gpu/drm/i915/intel_color_manager.c
+++ b/drivers/gpu/drm/i915/intel_color_manager.c
@@ -176,6 +176,25 @@ void intel_color_manager_crtc_commit(struct drm_device *dev,
 	}
 }
 
+int intel_color_manager_set_pipe_degamma(struct drm_device *dev,
+		struct drm_crtc_state *crtc_state,
+		struct drm_mode_object *obj, uint32_t blob_id)
+{
+	struct drm_property_blob *blob;
+
+	blob = drm_property_lookup_blob(dev, blob_id);
+	if (!blob) {
+		DRM_ERROR("Invalid Blob ID\n");
+		return -EINVAL;
+	}
+
+	if (crtc_state->palette_before_ctm_blob)
+		drm_property_unreference_blob(crtc_state->palette_before_ctm_blob);
+
+	crtc_state->palette_before_ctm_blob = blob;
+	return 0;
+}
+
 int intel_color_manager_set_pipe_gamma(struct drm_device *dev,
 		struct drm_crtc_state *crtc_state,
 		struct drm_mode_object *obj, uint32_t blob_id)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index d8d8326..03c7468 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1456,6 +1456,9 @@ void intel_attach_color_properties_to_crtc(struct drm_device *dev,
 int intel_color_manager_set_pipe_gamma(struct drm_device *dev,
 		struct drm_crtc_state *crtc_state,
 		struct drm_mode_object *obj, uint32_t blob_id);
+int intel_color_manager_set_pipe_degamma(struct drm_device *dev,
+		struct drm_crtc_state *crtc_state,
+		struct drm_mode_object *obj, uint32_t blob_id);
 void intel_color_manager_crtc_commit(struct drm_device *dev,
 		struct drm_crtc_state *crtc_state);
 
-- 
2.4.5