[Bug 47765] New: Corrupt rendering to a window between 57 and 63 pixels high

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=47765

             Bug #: 47765
           Summary: Corrupt rendering to a window between 57 and 63 pixels
                    high
    Classification: Unclassified
           Product: Mesa
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: tvrtko.ursulin at onelan.co.uk


We are seeing render corruption when rendering a texture to a window between 57
and 63 pixels high. glViewport being set to window dimensions.

Texture vertices do not seem to matter. If I render to the full viewport, or to
a subset of a viewport, always the whole viewport gets corrupt (so including
the area outside texture vertices).

Texture size does not seem to matter.

Rendering is done with glDrawArray GL_TRIANGLE_FAN and the destination window
is RGBA.

Environment:

00:01.0 VGA compatible controller: ATI Technologies Inc AMD Radeon HD 6310
GraphicsATI

Kernel 3.3.0 + 0001-drm-radeon-add-support-for-evergreen-ni-tiling-infor.patch

It does not happen without this patch - so it is probably tiling related.

xorg-drivers-ati, mesa and libdrm from yesterday's git. Last one is in fact a
bit older, but I applied a single interesting patch
(9b3ad51ae5fd9654df8ef75de845a519015150bb) by hand to make it up to date.

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