drm/amd/display: Define dithering options

Signed-off-by: Ding Wang <Ding.Wang@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc.h

@@ -430,6 +430,7 @@ struct dc_stream {
 	enum signal_type output_signal;
 
 	enum dc_color_space output_color_space;
+	enum dc_dither_option dither_option;
 
 	struct rect src; /* composition area */
 	struct rect dst; /* stream addressable area */
@@ -444,7 +445,6 @@ struct dc_stream {
 	struct colorspace_transform gamut_remap_matrix;
 	struct csc_transform csc_color_matrix;
 
-	/* TODO: dithering */
 	/* TODO: custom INFO packets */
 	/* TODO: ABM info (DMCU) */
 	/* TODO: PSR info */

drivers/gpu/drm/amd/display/dc/dc_hw_types.h

@@ -484,6 +484,35 @@ enum dc_color_space {
 	COLOR_SPACE_ADOBERGB,
 };
 
+enum dc_dither_option {
+	DITHER_OPTION_DEFAULT,
+	DITHER_OPTION_DISABLE,
+	DITHER_OPTION_FM6,
+	DITHER_OPTION_FM8,
+	DITHER_OPTION_FM10,
+	DITHER_OPTION_SPATIAL6_FRAME_RANDOM,
+	DITHER_OPTION_SPATIAL8_FRAME_RANDOM,
+	DITHER_OPTION_SPATIAL10_FRAME_RANDOM,
+	DITHER_OPTION_SPATIAL6,
+	DITHER_OPTION_SPATIAL8,
+	DITHER_OPTION_SPATIAL10,
+	DITHER_OPTION_TRUN6,
+	DITHER_OPTION_TRUN8,
+	DITHER_OPTION_TRUN10,
+	DITHER_OPTION_TRUN10_SPATIAL8,
+	DITHER_OPTION_TRUN10_SPATIAL6,
+	DITHER_OPTION_TRUN10_FM8,
+	DITHER_OPTION_TRUN10_FM6,
+	DITHER_OPTION_TRUN10_SPATIAL8_FM6,
+	DITHER_OPTION_SPATIAL10_FM8,
+	DITHER_OPTION_SPATIAL10_FM6,
+	DITHER_OPTION_TRUN8_SPATIAL6,
+	DITHER_OPTION_TRUN8_FM6,
+	DITHER_OPTION_SPATIAL8_FM6,
+	DITHER_OPTION_MAX = DITHER_OPTION_SPATIAL8_FM6,
+	DITHER_OPTION_INVALID
+};
+
 enum dc_quantization_range {
 	QUANTIZATION_RANGE_UNKNOWN,
 	QUANTIZATION_RANGE_FULL,