Re: Linux 5.7-rc1 reboot/poweroff hangs

[Shuah Khan]

On 4/17/20 12:05 PM, Shuah Khan wrote:
> Hi Linus,
>
> Linux 5.7-rc1 reboot/powereoff hangs on AMD Ryzen 5 PRO 2400GE
> system.
>
> I isolated the commit to:
>
> Revering the following commit fixes the problem.
>
> commit 487eca11a321ef33bcf4ca5adb3c0c4954db1b58
> Author: Prike Liang <Prike.Liang@xxxxxxx>
> Date:ÂÂ Tue Apr 7 20:21:26 2020 +0800
>
>  ÂÂÂ drm/amdgpu: fix gfx hang during suspend with video playback (v2)
>
>  ÂÂÂ The system will be hang up during S3 suspend because of SMU is
>  ÂÂÂ pending for GC not respose the register CP_HQD_ACTIVE access
>  ÂÂÂ request.This issue root cause of accessing the GC register under
>  ÂÂÂ enter GFX CGGPG and can be fixed by disable GFX CGPG before perform
>  ÂÂÂ suspend.

I can send a revert, however it appears this is a fix for a suspend
hang.

thanks,
-- Shuah