1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 0acbe62901d9..161a74a3ac5e 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -621,6 +621,25 @@ static void omap_crtc_post_apply(struct omap_drm_apply *apply)
         /* nothing needed for post-apply */
 }
 
+void omap_crtc_flush(struct drm_crtc *crtc)
+{
+        struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
+        int loops = 0;
+
+        while (!list_empty(&omap_crtc->pending_applies) ||
+                !list_empty(&omap_crtc->queued_applies) ||
+                omap_crtc->event || omap_crtc->old_fb) {
+
+                if (++loops > 10) {
+                        dev_err(crtc->dev->dev,
+                                "omap_crtc_flush() timeout\n");
+                        break;
+                }
+
+                schedule_timeout_uninterruptible(msecs_to_jiffies(20));
+        }
+}
+
 static const char *channel_names[] = {
                 [OMAP_DSS_CHANNEL_LCD] = "lcd",
                 [OMAP_DSS_CHANNEL_DIGIT] = "tv",