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drm/radeon/kms: disable VGA rendering engine before taking over VRAM
authorDave Airlie <airlied@linux.ie>
Fri, 18 Sep 2009 04:16:38 +0000 (14:16 +1000)
committerDave Airlie <airlied@redhat.com>
Fri, 18 Sep 2009 06:13:11 +0000 (16:13 +1000)
Before we use any of VRAM, we need to disable the VGA rendering
engine, this render text mode into a graphical framebuffer
for scanout, however it does this on vblank, and can end up
overwriting the GART table and r600 shader objects.

Signed-off-by: Dave Airlie <airlied@redhat.com>

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