From: Jesse Barnes Date: Thu, 10 Sep 2009 22:28:06 +0000 (-0700) Subject: drm/i915: framebuffer compression for pre-GM45 X-Git-Tag: v2.6.32-rc1~52^2~44 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8082400327d8d2ca54254b593644942bed0edd25;p=pandora-kernel.git 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 Signed-off-by: Eric Anholt --- Reading git-diff-tree failed