Bug 109648

Summary: AMD Raven hang during va-api decoding
Product: Mesa Reporter: Michael Eagle <xanto>
Component: Drivers/Gallium/radeonsiAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED FIXED QA Contact: Default DRI bug account <dri-devel>
Severity: major    
Priority: medium CC: leoxsliu
Version: git   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
See Also: https://bugs.freedesktop.org/show_bug.cgi?id=109107
i915 platform: i915 features:
Attachments: dmesg
Mesa radeon vcn vp9 patch

Description Michael Eagle 2019-02-15 22:15:13 UTC
Created attachment 143383 [details]


After fixing https://bugs.freedesktop.org/show_bug.cgi?id=109107, hardware decode on Ryzen 2700u started working again.

However, at the next update at mesa git 67426cc the GPU is hanging completely if I try to watch videos on chromium-vaapi, with the following error:

[  215.259576] amdgpu 0000:04:00.0: [mmhub] VMC page fault (src_id:0 ring:40 vmid:5 pasid:32770, for process chromium-vaapi pid 2877 thread chromium-v:cs0 pid 2946)
[  215.259583] amdgpu 0000:04:00.0:   in page starting at address 0x0000800110352000 from 18
[  215.259585] amdgpu 0000:04:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00540451
[  225.212368] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring vcn_dec timeout, signaled seq=46, emitted seq=48
[  225.212466] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* Process information: process chromium-vaapi pid 2877 thread chromium-v:cs0 pid 2946

Graphical interface is hanged completely however music keeps hanging in the background, so I was able to ssh into the system and dump the dmesg log.

Fedora repos:
che-mesa, rpmfusion, fedora-rawhide-kernel-nodebug
Mesa-git installed is build from: sha 67426cc

Full dmesg log attached.
Comment 1 Michael Eagle 2019-02-15 22:52:51 UTC
Same behavior happens with both:

Downgrading the kernel to official fedora '4.20.7-200.fc29.x86_64' makes the system not to crash anymore, however the video is very scrambled, as part of it would play in a loop.

Disabling 'hardware accelerated video decode' in chrome://flags/ fixes the issue.
Comment 2 leoxsliu 2019-03-27 12:53:20 UTC
Created attachment 143790 [details] [review]
Mesa radeon vcn vp9 patch
Comment 3 leoxsliu 2019-03-27 12:54:38 UTC
Please try the attached patch for VP9 HW acceleration fix for Chromium browser.
Comment 4 jamesz@amd.com 2019-03-27 16:43:25 UTC
Test on bench with this patch. The hung issue was fixed.
Comment 5 Michael Eagle 2019-04-04 19:05:59 UTC
Created attachment 143864 [details]


Sorry for the late reply, I've just tested it using mesa git SHA 138865e ,
which includes this commit. And the issue seems solved.
I suppose this can be closed now.
Thank you much!

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