This is a note to let you know that I've just added the patch titled
drm/fsl-dcu: enable IRQ before drm_atomic_helper_resume()
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-fsl-dcu-enable-irq-before-drm_atomic_helper_resume.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@xxxxxxxxxxxxxxx> know about it.
>From 9fd99f4f3f5e13ce959900ae57d64b1bdb51d823 Mon Sep 17 00:00:00 2001
From: Stefan Agner <stefan@xxxxxxxx>
Date: Fri, 10 Nov 2017 10:15:28 +0100
Subject: drm/fsl-dcu: enable IRQ before drm_atomic_helper_resume()
From: Stefan Agner <stefan@xxxxxxxx>
commit 9fd99f4f3f5e13ce959900ae57d64b1bdb51d823 upstream.
The resume helpers wait for a vblank to occurre hence IRQ need
to be enabled. This avoids a warning as follows during resume:
WARNING: CPU: 0 PID: 314 at drivers/gpu/drm/drm_atomic_helper.c:1249 drm_atomic_helper_wait_for_vblanks.part.1+0x284/0x288
[CRTC:28:crtc-0] vblank wait timed out
Signed-off-by: Stefan Agner <stefan@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -265,6 +265,7 @@ static int fsl_dcu_drm_pm_resume(struct
if (fsl_dev->tcon)
fsl_tcon_bypass_enable(fsl_dev->tcon);
fsl_dcu_drm_init_planes(fsl_dev->drm);
+ enable_irq(fsl_dev->irq);
drm_atomic_helper_resume(fsl_dev->drm, fsl_dev->state);
console_lock();
@@ -272,7 +273,6 @@ static int fsl_dcu_drm_pm_resume(struct
console_unlock();
drm_kms_helper_poll_enable(fsl_dev->drm);
- enable_irq(fsl_dev->irq);
return 0;
}
Patches currently in stable-queue which might be from stefan@xxxxxxxx are
queue-4.9/drm-fsl-dcu-avoid-disabling-pixel-clock-twice-on-suspend.patch
queue-4.9/drm-fsl-dcu-enable-irq-before-drm_atomic_helper_resume.patch