From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Mon, 31 Aug 2009 17:24:31 +0000 (-0700)
Subject: drm/i915: increase default latency constant (v2 w/comment)
X-Git-Tag: v2.6.31~8^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bcc24fb42585dc9f490cf7789a917358414bdab5;p=pandora-kernel.git

drm/i915: increase default latency constant (v2 w/comment)

Some i915/i945 platforms have a fairly high memory latency in certain
situations, so increase our constant a bit to avoid FIFO underruns.
The effect should be positive on other platforms as well; we'll have a
bit more insurance against a busy memory subsystem due to the extra
FIFO entries.

Fixes fdo bug #23368.  Needed for 2.6.31.

Tested-by: Sven Arvidsson <sa@whiz.se>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
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