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authorJesse Barnes <jbarnes@virtuousgeek.org>2009-09-10 15:28:06 -0700
committerEric Anholt <eric@anholt.net>2009-09-10 19:46:07 -0700
commit8082400327d8d2ca54254b593644942bed0edd25 (patch)
tree43a32ac4e56e985341e2109d2c4d545d3d6df6cb /firmware/e100
parent06324194eee97a51b5f172270df49ec39192d6cc (diff)
downloadblackbird-op-linux-8082400327d8d2ca54254b593644942bed0edd25.tar.gz
blackbird-op-linux-8082400327d8d2ca54254b593644942bed0edd25.zip
drm/i915: framebuffer compression for pre-GM45
This patch adds framebuffer compression (good for about ~0.5W power savings in the best case) support for pre-GM45 chips. GM45+ have a new, more flexible FBC scheme that will be added in a separate patch. FBC can't always be enabled: the compressed buffer must be physically contiguous and reside in stolen space. So if you have a large display and a small amount of stolen memory, you may not be able to take advantage of FBC. In some cases, a BIOS setting controls how much stolen space is available. Increasing this to 8 or 16M can help. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Eric Anholt <eric@anholt.net>
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