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| author | Alex Deucher <alexander.deucher@amd.com> | 2016-06-01 12:58:36 -0400 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2016-08-22 12:23:05 -0400 |
| commit | 5a88bc526e6d39398515ea56f2f22468567f1f2b (patch) | |
| tree | 4c6f95059df9e44882d31182e35a325a29e76382 /drivers | |
| parent | 5467159ce7daea9c2f7548b1a7835ee6cecbfb68 (diff) | |
| download | lwn-5a88bc526e6d39398515ea56f2f22468567f1f2b.tar.gz lwn-5a88bc526e6d39398515ea56f2f22468567f1f2b.zip | |
drm/radeon: add a delay after ATPX dGPU power off
[ Upstream commit d814b24fb74cb9797d70cb8053961447c5879a5c ]
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@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_atpx_handler.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c index 8bc7d0bbd3c8..868247c22de4 100644 --- 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" @@ -255,6 +256,10 @@ static int radeon_atpx_set_discrete_state(struct radeon_atpx *atpx, u8 state) if (!info) return -EIO; kfree(info); + + /* 200ms delay is required after off */ + if (state == 0) + msleep(200); } return 0; } |