From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed, 14 Oct 2009 19:12:46 +0000 (+0100)
Subject: drm/i915: Install a fence register for fbc on g4x
X-Git-Tag: v2.6.32-rc7~79^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0d9c778978ff268228c095ae737c282c03a5986d;p=pandora-kernel.git

drm/i915: Install a fence register for fbc on g4x

To enable framebuffer compression on a g4x, we not only need the buffer
to tiled (X only), we also need to hold a fence register for the buffer.
Currently we only install a fence register for pre-i965s when setting up
the scanout buffer. Rather than adding some convoluted logic to
g4x_enable_fbc() to acquire a fence register, and perhaps to
g4x_disable_fbc() to release it again, we can extend the acquisition
during setup to all chipsets.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
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