[Bug 63979] New: s3tc not working with radeonsi driver

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63979

          Priority: medium
            Bug ID: 63979
          Assignee: dri-devel at lists.freedesktop.org
           Summary: s3tc not working with radeonsi driver
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: kallisti5 at unixzen.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/Gallium/radeonsi
           Product: Mesa

s3tc doesn't work when using the radeonsi driver.

Example:

kallisti5 at eris ~ :) $ find /usr/lib -name "radeonsi*"
/usr/lib/xorg/modules/dri/radeonsi_dri.so

kallisti5 at eris ~ :) $ glxinfo | grep renderer
OpenGL renderer string: Gallium 0.4 on AMD TAHITI

No EXT_texture_compress (aka s3tc)
kallisti5 at eris ~ :) $ glxinfo | grep EXT_texture_compress

Move radeonsi driver somewhere else forcing fallback to swpipe:

kallisti5 at eris ~ :( $ sudo mv /usr/lib/xorg/modules/dri/radeonsi_dri.so /tmp/

Now using llvmpipe:
kallisti5 at eris ~ :) $ glxinfo | grep renderer
libGL error: failed to load driver: radeonsi
libGL error: Try again with LIBGL_DEBUG=verbose for more details.
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.3, 128 bits)

s3tc now working:
kallisti5 at eris ~ :) $ glxinfo | grep EXT_texture_compress
libGL error: failed to load driver: radeonsi
libGL error: Try again with LIBGL_DEBUG=verbose for more details.
    GL_EXT_texture_array, GL_EXT_texture_compression_dxt1, 
    GL_EXT_texture_compression_latc, GL_EXT_texture_compression_rgtc, 
    GL_EXT_texture_compression_s3tc, GL_EXT_texture_cube_map, 
kallisti5 at eris ~ :) $

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