drm: rcar-du: Handle event when disabling CRTCs

[ Upstream commit 6dd47cfd03a058d08b8caffb06194aa0eb109cf1 ]

The driver currently handles vblank events only when updating planes on
a CRTC. The atomic update API however allows requesting an event when
disabling a CRTC. This currently leads to event objects being leaked in
the kernel and to events not being sent out. Fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 3322b15..1c4d95d 100644 (file)
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -512,6 +512,13 @@ static void rcar_du_crtc_disable(struct drm_crtc *crtc)
        rcar_du_crtc_stop(rcrtc);
        rcar_du_crtc_put(rcrtc);
 
+       spin_lock_irq(&crtc->dev->event_lock);
+       if (crtc->state->event) {
+               drm_crtc_send_vblank_event(crtc, crtc->state->event);
+               crtc->state->event = NULL;
+       }
+       spin_unlock_irq(&crtc->dev->event_lock);
+
        rcrtc->outputs = 0;
 }