+void exynos_drm_encoder_complete_scanout(struct drm_framebuffer *fb)
+{
+ struct exynos_drm_encoder *exynos_encoder;
+ struct exynos_drm_overlay_ops *overlay_ops;
+ struct exynos_drm_manager *manager;
+ struct drm_device *dev = fb->dev;
+ struct drm_encoder *encoder;
+
+ /*
+ * make sure that overlay data are updated to real hardware
+ * for all encoders.
+ */
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+ exynos_encoder = to_exynos_encoder(encoder);
+
+ /* if exynos was disabled, just ignor it. */
+ if (exynos_encoder->dpms > DRM_MODE_DPMS_ON)
+ continue;
+
+ manager = exynos_encoder->manager;
+ overlay_ops = manager->overlay_ops;
+
+ /*
+ * wait for vblank interrupt
+ * - this makes sure that overlay data are updated to
+ * real hardware.
+ */
+ if (overlay_ops->wait_for_vblank)
+ overlay_ops->wait_for_vblank(manager->dev);
+ }
+}
+
+