drm_driver_color_mode_format
u32 fourcc = drm_driver_color_mode_format(dev, color_mode);
format = drm_driver_color_mode_format(dev, color_mode);
EXPORT_SYMBOL(drm_driver_color_mode_format);
uint32_t drm_driver_color_mode_format(struct drm_device *dev, unsigned int color_mode);