[Bug 97969] [radeonsi, bisected: fb827c0] Video decoding shows green artifacts

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97969

            Bug ID: 97969
           Summary: [radeonsi, bisected: fb827c0] Video decoding shows
                    green artifacts
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: alexandre.f.demers at gmail.com
        QA Contact: dri-devel at lists.freedesktop.org

Using R9 280X. Since today, playing videos with VLC displays green artifacts.
Tested with a few videos (mostly mp4 and mkv).

---
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: X.Org (0x1002)
    Device: AMD TAHITI (DRM 2.46.0 / 4.7.0-AGD5F-g4ae4f77-dirty, LLVM 4.0.0)
(0x6798)
    Version: 12.1.0
    Accelerated: yes
    Video memory: 3072MB
    Unified memory: no
    Preferred profile: core (0x1)
    Max core profile version: 4.3
    Max compat profile version: 3.0
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.1
---

Bisecting points to the following bad commit

fb827c055cb1bdd2b18d0687c06c56b537d805f3 is the first bad commit
commit fb827c055cb1bdd2b18d0687c06c56b537d805f3
Author: Nicolai Hähnle <nicolai.haehnle at amd.com>
Date:   Mon Sep 12 12:19:47 2016 +0200

    winsys/radeon: enable buffer allocation from slabs

    Only enable for chips with GPUVM, because older driver paths do not take
the
    required offset into account.

    Reviewed-by: Marek Olšák <marek.olsak at amd.com>

:040000 040000 4e1327d4b72890178a2057d2341971001f2de54d
d162404a219307e5f6cda1009b864e66f23f4e63 M      src

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