[Bug 70108] New: [bisected e64633e8c3a5498998a45ab721bf80edca101cf5] regression: bad rendering on r600g

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70108

          Priority: medium
            Bug ID: 70108
          Assignee: dri-devel at lists.freedesktop.org
           Summary: [bisected e64633e8c3a5498998a45ab721bf80edca101cf5]
                    regression: bad rendering on r600g
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: alexandre.f.demers at gmail.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r600
           Product: Mesa

I noticed a couple of days ago a regression on some demo applications where the
light or shadows wouldn't be rendered correctly. They form lines. This can be
observed testing Unigine where light reflecting on water or on the dock will
not be rendered correctly.

Bisecting gave me the following result:
git bisect bad
e64633e8c3a5498998a45ab721bf80edca101cf5 is the first bad commit
commit e64633e8c3a5498998a45ab721bf80edca101cf5
Author: Marek Olšák <marek.olsak at amd.com>
Date:   Sun Sep 22 13:06:27 2013 +0200

    r600g,radeonsi: share r600_texture.c

    The function r600_choose_tiling is new and needs a review.

    The only change in functionality is that it enables 2D tiling for
compressed
    textures on SI. It was probably accidentally turned off.

    v2: don't make scanout buffers linear

:040000 040000 138f5235123706d30903e259a8c7651ee53e9fd5
79f8e5d3497c5d2a3c71bb6ba968ecf5fd4c1a1a M    src

I'm using HD 6950 on ArchLinux 64, with latest drm and ddx from git.

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