diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn60/dcn60_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn60/dcn60_resource.c
index 7171b237c427..d7947105af22 100644
--- a/drivers/gpu/drm/amd/display/dc/resource/dcn60/dcn60_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/resource/dcn60/dcn60_resource.c
@@ -671,6 +671,8 @@ static const struct dc_debug_options debug_defaults_drv = {
 		}
 	},
 	.force_cositing = CHROMA_COSITING_NONE + 1,
+	.dml21_disable_pstate_method_mask = 0x20, // disable alt-ch unconditionally until dependencies are ready
+
 };
 
 static const struct dc_check_config config_defaults = {