[Bug 98162] gpu hangs with unigine heaven on drm-next-4.9-wip

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98162

            Bug ID: 98162
           Summary: gpu hangs with unigine heaven on drm-next-4.9-wip
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: haagch at frickel.club

Created attachment 127138
  --> https://bugs.freedesktop.org/attachment.cgi?id=127138&action=edit
dmesg with gpu hang

XFX Radeon RX 480 XXX OC, latest mesa git and llvm svn.

Running unigine heaven for a while hangs the gpu like this:

Okt 08 10:31:14 c-l kernel: [drm:amdgpu_job_timedout] *ERROR* ring gfx timeout,
last signaled seq=42581, last emitted seq=42583
Okt 08 10:31:14 c-l kernel: [drm] IP block:1 is hang!
Okt 08 10:31:14 c-l kernel: [drm] IP block:5 is hang!

I tried bisecting and landed on 4be051aeb3964146d3922238fff0ed1e4a9656d1
"drm/amd/powerplay: use smu7 hwmgr to manager polaris10/11" but I'm not 100%
confident I caught every bad commit because sometimes unigine heaven needs to
run for several minutes before the hang happens and this commit is not trivial
to revert.

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