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From:   Alex Deucher <alexdeucher@gmail.com>
Date:   Mon, 13 Apr 2020 13:48:58 -0400
Message-ID: <CADnq5_OXdpEebFY3+kyQb-WEw0Rb6cqoOFKGqgxaigU5hean1g@mail.gmail.com>
Subject: Re: [regression 5.7-rc1] System does not power off, just halts
To:     Paul Menzel <pmenzel@molgen.mpg.de>
Cc:     Prike Liang <Prike.Liang@amd.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        regressions@leemhuis.info, David Airlie <airlied@linux.ie>,
        Maling list - DRI developers 
        <dri-devel@lists.freedesktop.org>, X86 ML <x86@kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        "for 3.8" <stable@vger.kernel.org>, Huang Rui <ray.huang@amd.com>,
        amd-gfx list <amd-gfx@lists.freedesktop.org>,
        Daniel Vetter <daniel@ffwll.ch>,
        Mengbing Wang <Mengbing.Wang@amd.com>
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On Mon, Apr 13, 2020 at 1:47 PM Paul Menzel <pmenzel@molgen.mpg.de> wrote:
>
> Dear Prike, dear Alex, dear Linux folks,
>
>
> Am 13.04.20 um 10:44 schrieb Paul Menzel:
>
> > A regression between causes a system with the AMD board MSI B350M MORTA=
R
> > (MS-7A37) with an AMD Ryzen 3 2200G not to power off any more but just
> > to halt.
> >
> > The regression is introduced in 9ebe5422ad6c..b032227c6293. I am in the
> > process to bisect this, but maybe somebody already has an idea.
>
> I found the Easter egg:
>
> > commit 487eca11a321ef33bcf4ca5adb3c0c4954db1b58
> > Author: Prike Liang <Prike.Liang@amd.com>
> > Date:   Tue Apr 7 20:21:26 2020 +0800
> >
> >     drm/amdgpu: fix gfx hang during suspend with video playback (v2)
> >
> >     The system will be hang up during S3 suspend because of SMU is pend=
ing
> >     for GC not respose the register CP_HQD_ACTIVE access request.This i=
ssue
> >     root cause of accessing the GC register under enter GFX CGGPG and c=
an
> >     be fixed by disable GFX CGPG before perform suspend.
> >
> >     v2: Use disable the GFX CGPG instead of RLC safe mode guard.
> >
> >     Signed-off-by: Prike Liang <Prike.Liang@amd.com>
> >     Tested-by: Mengbing Wang <Mengbing.Wang@amd.com>
> >     Reviewed-by: Huang Rui <ray.huang@amd.com>
> >     Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> >     Cc: stable@vger.kernel.org
>
> It reverts cleanly on top of 5.7-rc1, and this fixes the issue.
>
> Greg, please do not apply this to the stable series. The commit message
> doesn=E2=80=99t even reference a issue/bug report, and doesn=E2=80=99t gi=
ve a detailed
> problem description. What system is it?
>
> Dave, Alex, how to proceed? Revert? I created issue 1094 [1].

Already fixed:
https://patchwork.freedesktop.org/patch/361195/

Alex

>
>
> Kind regards,
>
> Paul
>
>
> [1]: https://gitlab.freedesktop.org/drm/amd/-/issues/1094
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