[PATCH v2] drm/amdgpu: skipping SDMA hw_init and hw_fini for S0ix.

[Liang, Prike]

> -----Original Message-----
> From: Limonciello, Mario <Mario.Limonciello at amd.com>
> Sent: Friday, February 11, 2022 12:09 AM
> To: Alex Deucher <alexdeucher at gmail.com>; Liang, Prike
> <Prike.Liang at amd.com>
> Cc: Mahapatra, Rajib <Rajib.Mahapatra at amd.com>; Deucher, Alexander
> <Alexander.Deucher at amd.com>; amd-gfx at lists.freedesktop.org; S, Shirish
> <Shirish.S at amd.com>
> Subject: RE: [PATCH v2] drm/amdgpu: skipping SDMA hw_init and hw_fini for
> S0ix.
> 
> [Public]
> 
> > > VG doesn't do s0i3 right?
> >
> > Right.
> >
> > > No, YC should not take a similar fix.    YC had an architectural change and
> to
> > > avoid a "similar" problem takes
> > 26db706a6d77b9e184feb11725e97e53b7a89519.
> >
> > Isn't that likely just a workaround for the same issue?  This seems cleaner.
> >
> 
> The SMU doesn't handle the restore of the SDMA registers for YC though,
> this explicitly changed.  So I don't believe we can do an identical fix there.
> 
> @Liang, Prike comments?

Yeah, in the gfx10 series looks the SMU doesn't handle SDMA save and restore in the PMFW anymore.