From: Chris Wilson Date: Sat, 5 Feb 2011 10:08:21 +0000 (+0000) Subject: drm/i915: Replace vblank PM QoS with "Interrupt-Based AGPBUSY#" X-Git-Tag: v2.6.39-rc1~458^2~9^2~7 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8692d00e996ed2a6560702623e5cb646da0f9767;p=pandora-kernel.git drm/i915: Replace vblank PM QoS with "Interrupt-Based AGPBUSY#" I stumbled over this magic bit in the gen3 INSTPM: Bit11 Interrupt-Based AGPBUSY# Enable: ‘0’ = Pending GMCH interrupts will not cause AGPBUSY# assertion. ‘1’ = Pending GMCH interrupts will cause AGPBUSY# assertion and hence can cause the CPU to exit C3. There is no suppression of cacheable writes. Note that in either case in C3 the interrupts are not lost. They will be forwarded to the ICH when the GMCH is out of C3. Signed-off-by: Chris Wilson Tested-by: Daniel Vetter Cc: stable@kernel.org --- Reading git-diff-tree failed