[Bug 105853] [Gen9] ASTC texture downloads and CopyImage can fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105853

            Bug ID: 105853
           Summary: [Gen9] ASTC texture downloads and CopyImage can fail
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: nanleychery at gmail.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

When uploading ASTC textures on gen9, we perform a workaround that involves
modifying the compressed blocks. 

If these blocks are subsequently read via a texture download or CopyImage
operation, the result would not match what the user uploaded.

Another reason that CopyImage can fail is that the needed workaround is not
applied for CopyImage calls that have ASTC textures as the target. When the
ASTC texture is later read, we may encounter a rendering issue.

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