/** * radeon_get_vblank_timestamp_kms - get vblank timestamp * * @dev: drm dev pointer * @crtc: crtc to get the timestamp for * @max_error: max error * @vblank_time: time value * @flags: flags passed to the driver * * Gets the timestamp on the requested crtc based on the * scanout position. (all asics). * Returns postive status flags on success, negative error on failure. */