diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 7d39b858c9f1fbbfe68b6d2f0ad353f46b9ed99a..3a3a511670c9c3dd59808fda08a9063f7b97a5ea 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -226,6 +226,7 @@ static void ast_set_vbios_color_reg(struct ast_private *ast,
 	case 3:
 	case 4:
 		color_index = TrueCModeIndex;
+		break;
 	default:
 		return;
 	}