[AMD Official Use Only]

Hi Boris,

We are finalizing the solution for the issue here.
I'm wondering are you able to give the attached patch(alone) a try.
Since that might give us a different approach(more reasonable) to get the issue fixed.

BR
Evan

> -----Original Message-----
> From: Quan, Evan
> Sent: Friday, October 15, 2021 5:25 PM
> To: Borislav Petkov <bp@alien8.de>
> Cc: Alex Deucher <alexdeucher@gmail.com>; amd-gfx list <amd-
> gfx@lists.freedesktop.org>; LKML <linux-kernel@vger.kernel.org>; Deucher,
> Alexander <Alexander.Deucher@amd.com>; Pan, Xinhui
> <Xinhui.Pan@amd.com>; Chen, Guchun <Guchun.Chen@amd.com>
> Subject: RE: bf756fb833cb ("drm/amdgpu: add missing cleanups for Polaris12
> UVD/VCE on suspend")
> 
> [AMD Official Use Only]
> 
> 
> 
> > -----Original Message-----
> > From: Borislav Petkov <bp@alien8.de>
> > Sent: Thursday, October 14, 2021 5:01 PM
> > To: Quan, Evan <Evan.Quan@amd.com>
> > Cc: Alex Deucher <alexdeucher@gmail.com>; amd-gfx list <amd-
> > gfx@lists.freedesktop.org>; LKML <linux-kernel@vger.kernel.org>;
> > Deucher, Alexander <Alexander.Deucher@amd.com>; Pan, Xinhui
> > <Xinhui.Pan@amd.com>; Chen, Guchun <Guchun.Chen@amd.com>
> > Subject: Re: bf756fb833cb ("drm/amdgpu: add missing cleanups for
> > Polaris12 UVD/VCE on suspend")
> >
> > On Thu, Oct 14, 2021 at 02:02:48AM +0000, Quan, Evan wrote:
> > > [Quan, Evan] Yes, but not(apply them) at the same time. One by one
> > > as
> > you did before.
> > > - try the patch1 first
> >
> > Ok, first patch worked fine.
> >
> > > - undo the changes of patch1 and try patch2
> >
> > Did that, worked fine too except after the first resume cycle, the
> > video didn't continue playing.
> >
> > Then I restarted the video and did a couple more suspend cycles to see
> > if it would not continue again. In the subsequent tries it would
> > resume fine and the video would continue playing too.
> >
> > So I'm going to chalk that single case of halted video with the second
> > patch to a resume glitch or so.
> >
> > Btw, I don't have pm-suspend on that box but I did suspend to RAM
> > assuming this is what you wanted, which is done as root with two
> > commands:
> >
> > # echo "suspend" > /sys/power/disk
> > # echo "mem" > /sys/power/state
> [Quan, Evan] Yes, that also works.
> >
> > If you want me to do more extensive testing, just shoot.
> [Quan, Evan] Thanks! That's enough for now. I will prepare an official solution
> for the issue.
> 
> BR
> Evan
> >
> > HTH.
> >
> > --
> > Regards/Gruss,
> >     Boris.
> >
> >
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