[PATCH] drm/amdgpu: skip kfd-iommu suspend/resume for S0ix

[Alex Deucher]

On Wed, Apr 5, 2023 at 6:06 PM Limonciello, Mario
<mario.limonciello at amd.com> wrote:
>
> On 4/5/2023 06:29, Liu, Aaron wrote:
> > GFX is in gfxoff mode during s0ix so we shouldn't need to
> > actually execute kfd_iommu_suspend/kfd_iommu_resume operation.
> >
> > Signed-off-by: Aaron Liu <aaron.liu at amd.com>
> > ---
> Probably should add to this patch:
>
> Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2449

Acked-by: Alex Deucher <alexander.deucher at amd.com>

>
> >   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 8 +++++---
> >   1 file changed, 5 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > index 3b6b85d9e0be..5094be94fa06 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > @@ -3304,9 +3304,11 @@ static int amdgpu_device_ip_resume(struct amdgpu_device *adev)
> >   {
> >          int r;
> >
> > -       r = amdgpu_amdkfd_resume_iommu(adev);
> > -       if (r)
> > -               return r;
> > +       if (!adev->in_s0ix) {
> > +               r = amdgpu_amdkfd_resume_iommu(adev);
> > +               if (r)
> > +                       return r;
> > +       }
> >
> >          r = amdgpu_device_ip_resume_phase1(adev);
> >          if (r)
> > --
> > 2.39.0
> >
>