GM12U320_USER_WIDTH
x1 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
x2 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
struct drm_rect rect = { 0, 0, GM12U320_USER_WIDTH, GM12U320_HEIGHT };
dev->mode_config.min_width = GM12U320_USER_WIDTH;
dev->mode_config.max_width = GM12U320_USER_WIDTH;