Patch "media: vsp1: Prevent suspending and resuming DRM pipelines" has been added to the 4.14-stable tree

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

media: vsp1: Prevent suspending and resuming DRM pipelines

to the 4.14-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:
media-vsp1-prevent-suspending-and-resuming-drm-pipelines.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Kieran Bingham <[email protected]>
Date: Mon, 4 Dec 2017 06:01:11 -0500
Subject: media: vsp1: Prevent suspending and resuming DRM pipelines

From: Kieran Bingham <[email protected]>

[ Upstream commit a17d2d6cd9985ca09a9e384f1bc71d710f7e5203 ]

When used as part of a display pipeline, the VSP is stopped and restarted explicitly by the DU from its suspend and resume handlers. There is thus no need to stop or restart pipelines in the VSP suspend and resume handlers, and doing so would cause the hardware to be left in a misconfigured state.

Ensure that the VSP suspend and resume handlers do not affect DRM-based pipelines.

---
 drivers/media/platform/vsp1/vsp1_drv.c |   16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

@@ -571,7 +571,13 @@ static int __maybe_unused vsp1_pm_suspen
 {
 	struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 
-	vsp1_pipelines_suspend(vsp1);
+	/*
+	 * When used as part of a display pipeline, the VSP is stopped and
+	 * restarted explicitly by the DU.
+	 */
+	if (!vsp1->drm)
+		vsp1_pipelines_suspend(vsp1);
+
 	pm_runtime_force_suspend(vsp1->dev);
 
 	return 0;

@@ -582,7 +588,13 @@ static int __maybe_unused vsp1_pm_resume
 	struct vsp1_device *vsp1 = dev_get_drvdata(dev);
 
 	pm_runtime_force_resume(vsp1->dev);
-	vsp1_pipelines_resume(vsp1);
+
+	/*
+	 * When used as part of a display pipeline, the VSP is stopped and
+	 * restarted explicitly by the DU.
+	 */
+	if (!vsp1->drm)
+		vsp1_pipelines_resume(vsp1);
 
 	return 0;
 }

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/media-vsp1-prevent-suspending-and-resuming-drm-pipelines.patch