[PATCH] drm/amdgpu: atombios stuck executing during S3 stress test

[Alex Deucher]

On Wed, Oct 19, 2016 at 4:25 AM, jimqu <Jim.Qu at amd.com> wrote:
> Sometimes, atombios may be stucked when resume back. Duo to PCIE has
> set to D3cold, the ACC of GFX adapter is power-down. it should re-init
> the scratch registers. with the change, test is pass more than 80 cycles
> on Fiji.
>
> Change-Id: I9cf40c475c4a5a31216949d50cc5e30b74dc21c4
> Signed-off-by: JimQu <Jim.Qu at amd.com>

I think we probably want to save/restore these, although this
shouldn't hurt.  How about this patch?

Alex

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index e82c487..bfe9a5c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -2098,6 +2098,7 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
>                                 console_unlock();
>                         return r;
>                 }
> +               amdgpu_atombios_scratch_regs_init(adev);
>         }
>
>         /* post card */
> --
> 1.9.1
>
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> amd-gfx at lists.freedesktop.org
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