This is a note to let you know that I've just added the patch titled
drm/radeon: add a delay after ATPX dGPU power off
to the 4.7-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-radeon-add-a-delay-after-atpx-dgpu-power-off.patch
and it can be found in the queue-4.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d814b24fb74cb9797d70cb8053961447c5879a5c Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@xxxxxxx>
Date: Wed, 1 Jun 2016 12:58:36 -0400
Subject: drm/radeon: add a delay after ATPX dGPU power off
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From: Alex Deucher <alexander.deucher@xxxxxxx>
commit d814b24fb74cb9797d70cb8053961447c5879a5c upstream.
ATPX dGPU power control requires a 200ms delay between
power off and on. This should fix dGPU failures on
resume from power off.
Reviewed-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_atpx_handler.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c
+++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c
@@ -10,6 +10,7 @@
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/pci.h>
+#include <linux/delay.h>
#include "radeon_acpi.h"
@@ -258,6 +259,10 @@ static int radeon_atpx_set_discrete_stat
if (!info)
return -EIO;
kfree(info);
+
+ /* 200ms delay is required after off */
+ if (state == 0)
+ msleep(200);
}
return 0;
}
Patches currently in stable-queue which might be from alexander.deucher@xxxxxxx are
queue-4.7/drm-amdgpu-support-backlight-control-for-uniphy3.patch
queue-4.7/drm-amdgpu-fix-firmware-info-version-checks.patch
queue-4.7/drm-radeon-add-a-delay-after-atpx-dgpu-power-off.patch
queue-4.7/drm-amdgpu-add-a-delay-after-atpx-dgpu-power-off.patch
queue-4.7/drm-amdgpu-poll-for-both-connect-disconnect-on-analog-connectors.patch
queue-4.7/drm-radeon-support-backlight-control-for-uniphy3.patch
queue-4.7/drm-radeon-poll-for-both-connect-disconnect-on-analog-connectors.patch
queue-4.7/drm-radeon-fix-firmware-info-version-checks.patch
queue-4.7/drm-amdgpu-gmc7-add-missing-mullins-case.patch
queue-4.7/drm-amdgpu-disable-rpm-helpers-while-reprobing-connectors-on-resume.patch
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