From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Thu, 16 Jul 2009 20:01:02 +0000 (-0700)
Subject: drm/i915: correct self-refresh calculation in "everything off" case
X-Git-Tag: v2.6.31-rc6~37^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2a2430f4542467502d39660bfd66b0004fd8d6a9;p=pandora-kernel.git

drm/i915: correct self-refresh calculation in "everything off" case

If no planes are enabled, the self-refresh calculation may end up doing
a divide by zero.  This patch should prevent that by making sure at
least one of the CRTCs had a valid hdisplay value.

Reported-by: Eric Anholt <eric@anholt.net>
Tested-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
---

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