Re: Linux 6.1-rc1 drm/amdgpu regression

[Shuah Khan]

On 10/19/22 15:24, Deucher, Alexander wrote:
> [Public]
>
> > -----Original Message-----
> > From: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
> > Sent: Wednesday, October 19, 2022 5:00 PM
> > To: Deucher, Alexander <Alexander.Deucher@xxxxxxx>
> > Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>; linux-
> > kernel@xxxxxxxxxxxxxxx; Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
> > Subject: Re: Linux 6.1-rc1 drm/amdgpu regression
> >
> > On 10/19/22 14:27, Deucher, Alexander wrote:
> > > [AMD Official Use Only - General]
> > >
> > > > -----Original Message-----
> > > > From: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
> > > > Sent: Wednesday, October 19, 2022 4:00 PM
> > > > To: Deucher, Alexander <Alexander.Deucher@xxxxxxx>
> > > > Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>; Shuah Khan
> > > > <skhan@xxxxxxxxxxxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx
> > > > Subject: Linux 6.1-rc1 drm/amdgpu regression
> > > >
> > > > Hi Alex,
> > > >
> > > > I am seeing the same problem I sent reverts for on 5.10.147 on Linux
> > > > 6.1-rc1 on my laptop with AMD Ryzen 7 PRO 5850U with Radeon Graphics.
> > > >
> > > > commit e3163bc8ffdfdb405e10530b140135b2ee487f89
> > > > Author: Alex Deucher <alexander.deucher@xxxxxxx>
> > > > Date:   Fri Sep 9 11:53:27 2022 -0400
> > > >
> > > >        drm/amdgpu: move nbio sdma_doorbell_range() into sdma code for
> > > > vega
> > > >
> > > > I see that the following has been reverted in Linux 6.1-rc1
> > > >
> > > > commit 66f99628eb24409cb8feb5061f78283c8b65f820
> > > > Author: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
> > > > Date:   Tue Sep 6 15:01:49 2022 -0400
> > > >
> > > >        drm/amdgpu: use dirty framebuffer helper
> > > >
> > > > However I still see the following filling dmesg and system is unusable.
> > > > For now I switched back to Linux 6.0 as this is my primary system.
> > > >
> > > > [drm] Fence fallback timer expired on ring sdma0 [drm] Fence fallback
> > > > timer expired on ring gfx [drm] Fence fallback timer expired on ring
> > > > sdma0 [drm] Fence fallback timer expired on ring gfx [drm] Fence
> > > > fallback timer expired on ring sdma0 [drm] Fence fallback timer
> > > > expired on ring sdma0 [drm] Fence fallback timer expired on ring
> > > > sdma0 [drm] Fence fallback timer expired on ring gfx
> > > >
> > > > Please let me know if I should send revert for this for the mainline as well.
> > >
> > > Can you file a bug report
> > (https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitl
> > ab.freedesktop.org%2Fdrm%2Famd%2F-
> > %2Fissues&amp;data=05%7C01%7CAlexander.Deucher%40amd.com%7C61b
> > 64b1be7294b27eb2308dab214dbe2%7C3dd8961fe4884e608e11a82d994e183d
> > %7C0%7C0%7C638018099904584274%7CUnknown%7CTWFpbGZsb3d8eyJWIj
> > oiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3
> > 000%7C%7C%7C&amp;sdata=ZYA0bWZAGsxB91Bqcg1YAI704LhpISQX63bE67
> > UVO%2Bs%3D&amp;reserved=0) and attach your dmesg output?  I'd like to
> > try and repro the issue if I can and provide some patches to test.  I'd like to
> > avoid reverting the patch as that will break the driver for users using vega
> > dGPUs.
> >
> > Makes sense. I will file the bug and aattach dmesg. Since this is my primary
> > system, there will be some delay in getting this info. to you and testing any
> > patches you provide for testing.
>
> Actually I think I see what's wrong.  Can you try the attached patch?

This patch worked. Clean boot without any warns and timer expiry messages
from drm/amdgpu.

thanks,
-- Shuah