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

[Pinky]

Yes, this one seems to be already in the drm-next branch (HEAD is
now 7cdd4dc58d28).

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
>>