[PATCH 5/7] drm/amdgpu: for S0ix, skip SMDA 5.x+ suspend/resume

[Alex Deucher]

On Thu, Dec 15, 2022 at 10:05 AM Bhardwaj, Rajneesh
<rajneesh.bhardwaj at amd.com> wrote:
>
> Don't we need a similar check on resume_phase2?

The resume code looks to see if the IP was suspended in the first
place before trying to resume it so no need.

Alex

>
> Other than that, looks good to me.
>
> Acked-by: Rajneesh Bhardwaj <rajneesh.bhardwaj at amd.com>
>
> On 12/14/2022 5:16 PM, Alex Deucher wrote:
> > SDMA 5.x is part of the GFX block so it's controlled via
> > GFXOFF.  Skip suspend as it should be handled the same
> > as GFX.
> >
> > v2: drop SDMA 4.x.  That requires special handling.
> >
> > Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> > ---
> >   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 ++++++
> >   1 file changed, 6 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > index a99b327d5f09..5c0719c03c37 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > @@ -3028,6 +3028,12 @@ static int amdgpu_device_ip_suspend_phase2(struct amdgpu_device *adev)
> >                    adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GFX))
> >                       continue;
> >
> > +             /* SDMA 5.x+ is part of GFX power domain so it's covered by GFXOFF */
> > +             if (adev->in_s0ix &&
> > +                 (adev->ip_versions[SDMA0_HWIP][0] >= IP_VERSION(5, 0, 0)) &&
> > +                 (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SDMA))
> > +                     continue;
> > +
> >               /* XXX handle errors */
> >               r = adev->ip_blocks[i].version->funcs->suspend(adev);
> >               /* XXX handle errors */