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drm/i915: Zap the GTT mapping when transitioning from untiled to tiled.
authorEric Anholt <eric@anholt.net>
Fri, 10 Jul 2009 20:02:26 +0000 (13:02 -0700)
committerEric Anholt <eric@anholt.net>
Fri, 10 Jul 2009 21:10:58 +0000 (14:10 -0700)
As of 52dc7d32b88156248167864f77a9026abe27b432, we could leave an old
linear GTT mapping in place, so that apps trying to GTT-mapped write in
tiled data wouldn't get the fence added, and garbage would get displayed.

Signed-off-by: Eric Anholt <eric@anholt.net>

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