[Bug 211277] sometimes crash at s2ram-wake (Ryzen 3500U): amdgpu, drm, commit_tail, amdgpu_dm_atomic_commit_tail

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=211277

--- Comment #23 from James Zhu (jamesz at amd.com) ---
Hi kolAflash, 
VCN IP is for video acceleration(for video playback), if vcn ip didn't handle
suspend/resume process properly, we do observe other IP blocks be affected. For
your case it is display IP(dm) related. ip_block_mask=0xff (in grub should be
amdgpu.ip_block_mask=0x0ff) can disable VCN IP during amdgpu driver loading. so
this experiment can tell if this dm error is caused by VCN IP or not. 
sometimes /sys/kernel/debug/dri/0/amdgpu_fence_info  can provide some useful
information if it has chance to be dumped.
these experiments can help identified which IP cause the issue. So we can find
expert in that area to continue to triage. Your current report is case 2, so it
can be replaced with 
2. amd-drm-next-5.14-2021-05-12* with ip_block_mask=0x0ff, with Xorg and
without 3D acceleration in daily use.
I suggest you to execute your test plan in order 4->3->2->1.
Thanks!
James

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