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authorJesse Barnes <jbarnes@virtuousgeek.org>2010-08-18 13:20:54 -0700
committerEric Anholt <eric@anholt.net>2010-08-21 22:59:23 -0700
commit9d0498a2bf7455159b317f19531a3e5db2ecc9c4 (patch)
tree41f2a8b1013d2ee12852d8885b9952120f3d6ebb /drivers/gpu/Makefile
parentd240f20f545fa4ed78ce48d1eb62ab529f2b1467 (diff)
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drm/i915: wait for actual vblank, not just 20ms
Waiting for a hard coded 20ms isn't always enough to make sure a vblank period has actually occurred, so add code to make sure we really have passed through a vblank period (or that the pipe is off when disabling). This prevents problems with mode setting and link training, and seems to fix a bug like https://bugs.freedesktop.org/show_bug.cgi?id=29278, but on an HP 8440p instead. Hopefully also fixes https://bugs.freedesktop.org/show_bug.cgi?id=29141. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Eric Anholt <eric@anholt.net>
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