Screen flicckering due to "drm/amdgpu: enable gfxoff again on raven series"

Mon Apr 8 10:36:53 UTC 2019

> -----Original Message-----
> From: Pinky [mailto:j-pi at seznam.cz]
> Sent: Saturday, April 06, 2019 3:09 PM
> To: Alex Deucher <alexdeucher at gmail.com>
> Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Huang, Ray
> <Ray.Huang at amd.com>; amd-gfx at lists.freedesktop.org
> Subject: Re: Screen flicckering due to "drm/amdgpu: enable gfxoff again on
> raven series"
> 
> Yes this seems to solve the issue, even amdgpu.ppfeaturemask=0xffff7fff
> provides the same efect.
> 
> 
> * Alex Deucher <alexdeucher at gmail.com> [2019-04-05 16:26:15 -0400]:
> 
> >On Fri, Apr 5, 2019 at 4:00 PM Pinky <j-pi at seznam.cz> wrote:
> >>
> >> Yes, this one seems to be already in the drm-next branch (HEAD is now
> >> 7cdd4dc58d28).
> >>
> >
> >I'm not sure what is going on them.  You have RLC firmware version
> >53815 (0x0000d237) so gfx power gating is being disabled as of
> >083d022913f2f8c3bc1183a13874ad777b9f5bdd.

Hi Pinkava,

We have a similar issue that screen flickering caused by stutter mode.

But per your testing result, I am a bit confused.

You mentioned that "ppfeaturemask=0xfffd3fff" could be fixed the issue, but "0xfffdbfff" doesn't fix it.
However, this is the same configuration while you add below patch.  Because the gfxoff feature will be disabled while detect the RLC ucode is 53815 (0x0000d237).
https://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-next-5.2-wip&id=083d022913f2f8c3bc1183a13874ad777b9f5bdd 

Thanks,
Ray

> >
> >Does setting amdgpu.ppfeaturemask=0xfffd3fff fix the issue?
> >
> >Alex
> >
> >> Just for completenes, there seems to be few more (probably unrelated)
> bugs.
> >> One with mouse (1), some artifact sometimes appear and terminal in X
> >> sometimes display black instead of text when scrooling. I did not
> >> intend to discuss this here, just mentioning it.
> >>
> >> P
> >>
> >>
> >>
> >> (1) https://bugs.freedesktop.org/show_bug.cgi?id=110339
> >>
> >> * Deucher, Alexander <Alexander.Deucher at amd.com> [2019-04-05
> 18:44:52 +0000]:
> >>
> >> >Make sure you have this patch as well:
> >> >https://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-next-5.2-
> wip
> >> >&id=083d022913f2f8c3bc1183a13874ad777b9f5bdd
> >> >
> >> >Alex
> >> >________________________________
> >> >From: Pinky <j-pi at seznam.cz>
> >> >Sent: Friday, April 5, 2019 2:38 PM
> >> >To: Deucher, Alexander
> >> >Cc: Huang, Ray; amd-gfx at lists.freedesktop.org
> >> >Subject: Re: Screen flicckering due to "drm/amdgpu: enable gfxoff again
> on raven series"
> >> >
> >> >
> >> >cat /sys/kernel/debug/dri/0/amdgpu_firmware_info
> >> >VCE feature version: 0, firmware version: 0x00000000 UVD feature
> >> >version: 0, firmware version: 0x00000000 MC feature version: 0,
> >> >firmware version: 0x00000000 ME feature version: 40, firmware
> >> >version: 0x00000099 PFP feature version: 40, firmware version:
> >> >0x000000ae CE feature version: 40, firmware version: 0x0000004d RLC
> >> >feature version: 1, firmware version: 0x0000d237 RLC SRLC feature
> >> >version: 1, firmware version: 0x00000001 RLC SRLG feature version:
> >> >1, firmware version: 0x00000001 RLC SRLS feature version: 1,
> >> >firmware version: 0x00000001 MEC feature version: 40, firmware
> >> >version: 0x0000018b
> >> >MEC2 feature version: 40, firmware version: 0x0000018b SOS feature
> >> >version: 0, firmware version: 0x00000000 ASD feature version: 0,
> >> >firmware version: 0x0017ba78 TA XGMI feature version: 0, firmware
> >> >version: 0x00000000 TA RAS feature version: 0, firmware version:
> >> >0x00000000 SMC feature version: 0, firmware version: 0x00001e44
> >> >SDMA0 feature version: 41, firmware version: 0x000000a9 VCN feature
> >> >version: 0, firmware version: 0x01004912 DMCU feature version: 0,
> >> >firmware version: 0x00000001 VBIOS version: 113-RAVEN-110
> >> >
> >> >
> >> >
> >> >* Deucher, Alexander <Alexander.Deucher at amd.com> [2019-04-05
> 18:33:23 +0000]:
> >> >
> >> >>+ Ray
> >> >>
> >> >>Ray, any ideas?
> >> >>
> >> >>Pinkava,
> >> >>
> >> >>can you provide the output of:
> >> >>sudo cat /sys/kernel/debug/dri/0/amdgpu_firmware_info
> >> >>
> >> >>Thanks,
> >> >>
> >> >>Alex
> >> >>________________________________
> >> >>From: Pinky <j-pi at seznam.cz>
> >> >>Sent: Friday, April 5, 2019 1:53 PM
> >> >>To: Deucher, Alexander
> >> >>Cc: amd-gfx at lists.freedesktop.org
> >> >>Subject: Re: Screen flicckering due to "drm/amdgpu: enable gfxoff
> again on raven series"
> >> >>
> >> >>No, this does no do anything, the bug is still present.
> >> >>
> >> >>
> >> >>* Deucher, Alexander <Alexander.Deucher at amd.com> [2019-04-05
> 17:07:21 +0000]:
> >> >>
> >> >>>This may be related to stutter mode rather than gfxoff.  If so, there is
> a fix in the pipeline for that.  Does setting appending
> amdgpu.ppfeaturemask=0xfffdbfff on the kernel command line fix it?
> >> >>>
> >> >>>Alex
> >> >>>________________________________
> >> >>>From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf
> of
> >> >>>Pinky <j-pi at seznam.cz>
> >> >>>Sent: Friday, April 5, 2019 12:24 PM
> >> >>>To: amd-gfx at lists.freedesktop.org
> >> >>>Subject: Screen flicckering due to "drm/amdgpu: enable gfxoff again
> on raven series"
> >> >>>
> >> >>>Hello,
> >> >>>
> >> >>>I have today compiled the drm-next kernel from (1) and find out
> >> >>>the screen is flickering and shows various artifacts. By
> >> >>>bissecting I found the cause is commit
> >> >>>005440066f929ba0dca8f4e0aebfbf8daac592cc. By reverting it the
> problem went out.
> >> >>>
> >> >>>I does not have idea about what to do next. Sorry if this should
> >> >>>be posted to some bugzilla instead, I have got a bit lost. If so,
> >> >>>would You please point my out what to do?
> >> >>>
> >> >>>With best regards,
> >> >>>    Pinkava J.
> >> >>>
> >> >>>
> >> >>>lspci (partial)
> >> >>>
> >> >>>00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Raven/Raven2
> >> >>>IOMMU
> >> >>>00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h
> >> >>>(Models 00h-0fh) PCIe Dummy Host Bridge
> >> >>>06:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
> >> >>>[AMD/ATI] Raven Ridge [Radeon Vega Series / Radeon Vega Mobile
> >> >>>Series] (rev d1)
> >> >>>06:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI]
> >> >>>Raven/Raven2/Fenghuang HDMI/DP Audio Controller
> >> >>>
> >> >>>
> >> >>>
> >> >>>
> >> >>>(1) git://people.freedesktop.org/~agd5f/linux
> >> >>>_______________________________________________
> >> >>>amd-gfx mailing list
> >> >>>amd-gfx at lists.freedesktop.org
> >> >>>https://lists.freedesktop.org/mailman/listinfo/amd-gfx
> >> >>
> >> >>>_______________________________________________
> >> >>>amd-gfx mailing list
> >> >>>amd-gfx at lists.freedesktop.org
> >> >>>https://lists.freedesktop.org/mailman/listinfo/amd-gfx
> >> >>
> >> _______________________________________________
> >> amd-gfx mailing list
> >> amd-gfx at lists.freedesktop.org
> >> https://lists.freedesktop.org/mailman/listinfo/amd-gfx