[Bug 102201] [regression, SI] GPU crash in Unigine Valley

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102201

            Bug ID: 102201
           Summary: [regression, SI] GPU crash in Unigine Valley
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: gr.muench at gmail.com
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 133476
  --> https://bugs.freedesktop.org/attachment.cgi?id=133476&action=edit
dmesg crash log

I get random GPU lockups in Unigine Valley. Sometimes it happens at Test 5 and
sometimes in Test 9. Basically the screen is freezing but music continues
playing. After sometime there is only noise on the screen. The performance went
also down, I saw 57 fps in Test 1 and now only 54 fps.
I also experience something similar during playing Shadow Warrior, in the
Prologue mission, GPU hangs forever.

Bisected this to:
064550238ef0b44e341b2a50c3147f83c2a6d5b0 is the first bad commit
commit 064550238ef0b44e341b2a50c3147f83c2a6d5b0
Author: Marek Olšák <marek.olsak at amd.com>
Date:   Thu Jul 27 02:40:34 2017 +0200

    radeonsi: use CLEAR_STATE to initialize some registers

    Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>

:040000 040000 621668e602ccd2f36299e329b096586baa920ba0
68d43945fde8fbbfad6ae444546a981af2507b03 M      src

During regression testing I faced
https://bugs.freedesktop.org/show_bug.cgi?id=101969 where I saw some serious
corruption of the graphics in Valley so I used this patch to overcome
https://cgit.freedesktop.org/mesa/mesa/commit/?id=b9fc9d3f241758ed8a274be7abf68bf448653508
But its the same issue like in the bug report mentioned above. Seems the patch
hasnt fixed all issues.

Device: AMD TAHITI (DRM 2.50.0 / 4.11.0-1-amd-staging, LLVM 5.0.0) (0x6798)
Radeon HD 7970

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