drm/i915/color: Add framework to program PRE/POST CSC LUT

Add framework that will help in loading LUT to Pre/Post CSC color
blocks.

v2: Add dsb support
v3: Align enum names
v4: Propagate change in lut data to crtc_state

Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Link: https://patch.msgid.link/20251203085211.3663374-11-uma.shankar@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Author: uma-intel

drivers/gpu/drm/i915/display/intel_color.c

@@ -93,6 +93,10 @@ struct intel_color_funcs {
 	/* Plane CSC*/
 	void (*load_plane_csc_matrix)(struct intel_dsb *dsb,
 				      const struct intel_plane_state *plane_state);
+
+	/* Plane Pre/Post CSC */
+	void (*load_plane_luts)(struct intel_dsb *dsb,
+				const struct intel_plane_state *plane_state);
 };
 
 #define CTM_COEFF_SIGN	(1ULL << 63)
@@ -4077,11 +4081,23 @@ intel_color_load_plane_csc_matrix(struct intel_dsb *dsb,
 		display->funcs.color->load_plane_csc_matrix(dsb, plane_state);
 }
 
+static void
+intel_color_load_plane_luts(struct intel_dsb *dsb,
+			    const struct intel_plane_state *plane_state)
+{
+	struct intel_display *display = to_intel_display(plane_state);
+
+	if (display->funcs.color->load_plane_luts)
+		display->funcs.color->load_plane_luts(dsb, plane_state);
+}
+
 void intel_color_plane_program_pipeline(struct intel_dsb *dsb,
 					const struct intel_plane_state *plane_state)
 {
 	if (plane_state->hw.ctm)
 		intel_color_load_plane_csc_matrix(dsb, plane_state);
+	if (plane_state->hw.degamma_lut || plane_state->hw.gamma_lut)
+		intel_color_load_plane_luts(dsb, plane_state);
 }
 
 void intel_color_crtc_init(struct intel_crtc *crtc)

drivers/gpu/drm/i915/display/intel_display_types.h

@@ -646,7 +646,7 @@ struct intel_plane_state {
 		enum drm_color_encoding color_encoding;
 		enum drm_color_range color_range;
 		enum drm_scaling_filter scaling_filter;
-		struct drm_property_blob *ctm;
+		struct drm_property_blob *ctm, *degamma_lut, *gamma_lut;
 	} hw;
 
 	struct i915_vma *ggtt_vma;

drivers/gpu/drm/i915/display/intel_plane.c

@@ -344,6 +344,10 @@ intel_plane_colorop_replace_blob(struct intel_plane_state *plane_state,
 {
 	if (intel_colorop->id == INTEL_PLANE_CB_CSC)
 		return drm_property_replace_blob(&plane_state->hw.ctm, blob);
+	else if (intel_colorop->id == INTEL_PLANE_CB_PRE_CSC_LUT)
+		return	drm_property_replace_blob(&plane_state->hw.degamma_lut, blob);
+	else if (intel_colorop->id == INTEL_PLANE_CB_POST_CSC_LUT)
+		return drm_property_replace_blob(&plane_state->hw.gamma_lut, blob);
 
 	return false;
 }