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Groups > linux.kernel > #1466099
| From | Jiri Slaby <jslaby@suse.cz> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 3.12 083/100] drm/radeon: add a delay after ATPX dGPU power off |
| Date | 2016-08-19 09:20 +0200 |
| Message-ID | <s7MfV-2xj-57@gated-at.bofh.it> (permalink) |
| References | <s7MfU-2xj-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Alex Deucher <alexander.deucher@amd.com> 3.12-stable review patch. If anyone has any objections, please let me know. =============== 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@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- drivers/gpu/drm/radeon/radeon_atpx_handler.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c index 7c6e3fd70e65..97dc62140fc9 100644 --- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c +++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c @@ -11,6 +11,7 @@ #include <acpi/acpi.h> #include <acpi/acpi_bus.h> #include <linux/pci.h> +#include <linux/delay.h> #include "radeon_acpi.h" @@ -253,6 +254,10 @@ 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; } -- 2.9.3
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[PATCH 3.12 083/100] drm/radeon: add a delay after ATPX dGPU power off Jiri Slaby <jslaby@suse.cz> - 2016-08-19 09:20 +0200
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