From: Shaohua Li <shaohua.li@intel.com>
Date: Wed, 18 Nov 2009 07:15:02 +0000 (+0800)
Subject: drm/i915: fix gpio register detection logic for BIOS without VBT
X-Git-Tag: v2.6.33-rc1~323^2~5^2~29
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=29874f44fbcbc24b231b42c9956f8f9de9407231;p=pandora-kernel.git

drm/i915: fix gpio register detection logic for BIOS without VBT

if no VBT is present, crt_ddc_bus will be left at 0, and cause us
to use that for the GPIO register offset. That's never a valid register
offset, so let the "undefined" value be 0 instead of -1.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
[anholt: clarified the commit message a bit]
---

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