[Bug 91667] Tonga Oopses with uvd + agd5f drm-next-4.3-wip

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91667

            Bug ID: 91667
           Summary: Tonga Oopses with uvd + agd5f drm-next-4.3-wip
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: adf.lists at gmail.com

Created attachment 117730
  --> https://bugs.freedesktop.org/attachment.cgi?id=117730&action=edit
Oops 1

Tried the newly updated agd5f drm-next-4.3-wip today and got some oopses with
uvd.

These are provoked by repeatedly starting a vid with mpplayer - a known issue,
but the change for me on Tonga is getting the Oopses.

On other kernels amdgpu/amd-staging/drm-fixes the same test would provoke a
ring 9 lock (rarely ring 0) and a failed reset, which at least would leave me
alive enough to get a VT.

I notice GPU stall detection has now been disabled - but testing various
4.3-wips over some weeks I have never got one anyway. Doing something like this
test or running valley would just lock the display and log nothing. SysRq
worked OK as it still does - just now I get some logging (though not for the
one Unigine Valley lock I just provoked).

I am now running mesa/drm mesa/mesa Git Xorg with DRI3 enabled.

While testing I noticed the tree got another update  - retested and still get
the same.

The first 2 are from the older tree, the second long as secondary Oopses were
provoked.

The third is current.

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