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drm/i915: Fix DDC on some systems by clearing BIOS GMBUS setup.
authorEric Anholt <eric@anholt.net>
Tue, 1 Dec 2009 19:56:30 +0000 (11:56 -0800)
committerEric Anholt <eric@anholt.net>
Tue, 1 Dec 2009 19:56:30 +0000 (11:56 -0800)
This is a sync of a fix I made in the old UMS code.  If the BIOS uses
the GMBUS and doesn't clear that setup, then our bit-banging I2C can
fail, leading to monitors not being detected.

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

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