Commit 8f811d10 authored by Alex Deucher's avatar Alex Deucher Committed by Greg Kroah-Hartman

drm/amdgpu: add a delay after ATPX dGPU power off

commit f81eb1a3 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: default avatarHawking Zhang <Hawking.Zhang@amd.com>
Acked-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent bedd8d60
......@@ -10,6 +10,7 @@
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include "amdgpu_acpi.h"
......@@ -256,6 +257,10 @@ static int amdgpu_atpx_set_discrete_state(struct amdgpu_atpx *atpx, u8 state)
if (!info)
return -EIO;
kfree(info);
/* 200ms delay is required after off */
if (state == 0)
msleep(200);
}
return 0;
}
......
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