Commit d814b24f authored by Alex Deucher's avatar Alex Deucher

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

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>
Cc: stable@vger.kernel.org
parent 305e12d0
...@@ -10,6 +10,7 @@ ...@@ -10,6 +10,7 @@
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/acpi.h> #include <linux/acpi.h>
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/delay.h>
#include "radeon_acpi.h" #include "radeon_acpi.h"
...@@ -269,6 +270,10 @@ static int radeon_atpx_set_discrete_state(struct radeon_atpx *atpx, u8 state) ...@@ -269,6 +270,10 @@ static int radeon_atpx_set_discrete_state(struct radeon_atpx *atpx, u8 state)
if (!info) if (!info)
return -EIO; return -EIO;
kfree(info); kfree(info);
/* 200ms delay is required after off */
if (state == 0)
msleep(200);
} }
return 0; return 0;
} }
......
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