Patch "drm: rcar-du: Handle event when disabling CRTCs" has been added to the 4.9-stable tree

Patch "drm: rcar-du: Handle event when disabling CRTCs" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm: rcar-du: Handle event when disabling CRTCs

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-rcar-du-handle-event-when-disabling-crtcs.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Sun Mar 18 16:55:33 CET 2018
From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Date: Fri, 10 Feb 2017 13:30:35 +0200
Subject: drm: rcar-du: Handle event when disabling CRTCs

From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>


[ 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>
---
 drivers/gpu/drm/rcar-du/rcar_du_crtc.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- 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
 	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;
 }
 


Patches currently in stable-queue which might be from laurent.pinchart+renesas@ideasonboard.com are

queue-4.9/v4l-vsp1-prevent-multiple-streamon-race-commencing-pipeline-early.patch
queue-4.9/v4l-vsp1-register-pipe-with-output-wpf.patch
queue-4.9/drm-rcar-du-handle-event-when-disabling-crtcs.patch
queue-4.9/media-vsp1-prevent-suspending-and-resuming-drm-pipelines.patch