drm: rcar-du: Wait for page flip completion when turning the CRTC off
Turning a CRTC off will prevent a queued page flip from ever completing,
potentially confusing userspace. Wait for queued page flips to complete
before turning the CRTC off to avoid this.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
index d2f89f7..fb39e04 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
@@ -15,6 +15,7 @@
#define __RCAR_DU_CRTC_H__
#include <linux/mutex.h>
+#include <linux/wait.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
@@ -32,6 +33,8 @@
bool started;
struct drm_pending_vblank_event *event;
+ wait_queue_head_t flip_wait;
+
unsigned int outputs;
int dpms;