drm/amd/display: Add new enum for EDID status

[Why]
We must support a new type of partial edid return in the future

[How]
Add interface and case hander for partial edid
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Signed-off-by: Dale Zhao <dale.zhao@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link.c

@@ -1183,6 +1183,9 @@ static bool detect_link_and_local_sink(struct dc_link *link,
 		case EDID_BAD_CHECKSUM:
 			DC_LOG_ERROR("EDID checksum invalid.\n");
 			break;
+		case EDID_PARTIAL_VALID:
+			DC_LOG_ERROR("Partial EDID valid, abandon invalid blocks.\n");
+			break;
 		case EDID_NO_RESPONSE:
 			DC_LOG_ERROR("No EDID read.\n");
 			/*

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

@@ -138,6 +138,7 @@ enum dc_edid_status {
 	EDID_BAD_CHECKSUM,
 	EDID_THE_SAME,
 	EDID_FALL_BACK,
+	EDID_PARTIAL_VALID,
 };
 
 enum act_return_status {