[PATCH] drm/amdgpu: force exit gfxoff on sdma resume for rmb s0ix

[Liang, Prike]

[Public]

Hold on there's still need further check the gfxoff control residence and will update the patch.

Thanks,
Prike
> -----Original Message-----
> From: Liang, Prike <Prike.Liang at amd.com>
> Sent: Friday, September 24, 2021 1:18 PM
> To: amd-gfx at lists.freedesktop.org
> Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Huang, Ray
> <Ray.Huang at amd.com>; Liang, Prike <Prike.Liang at amd.com>
> Subject: [PATCH] drm/amdgpu: force exit gfxoff on sdma resume for rmb
> s0ix
>
> In the s2idle stress test sdma resume fail occasionally,in the failed case GPU
> is in the gfxoff state.This issue may introduce by FSDL miss handle doorbell
> S/R and now temporary fix the issue by forcing exit gfxoff for sdma resume.
>
> Signed-off-by: Prike Liang <Prike.Liang at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
> b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
> index 24b0195..af759ab 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
> @@ -7608,6 +7608,14 @@ static int gfx_v10_0_suspend(void *handle)
>
>  static int gfx_v10_0_resume(void *handle)  {
> +     struct amdgpu_device *adev = (struct amdgpu_device *)handle;
> +
> +     /* TODO: check whether can submit a doorbell request to raise
> +      * a doorbell fence to exit gfxoff.
> +      */
> +     if (adev->in_s0ix)
> +             amdgpu_gfx_off_ctrl(adev, false);
> +
>       return gfx_v10_0_hw_init(handle);
>  }
>
> @@ -7819,6 +7827,9 @@ static int gfx_v10_0_late_init(void *handle)
>       struct amdgpu_device *adev = (struct amdgpu_device *)handle;
>       int r;
>
> +     if (adev->in_s0ix)
> +              amdgpu_gfx_off_ctrl(adev, true);
> +
>       r = amdgpu_irq_get(adev, &adev->gfx.priv_reg_irq, 0);
>       if (r)
>               return r;
> --
> 2.7.4