From: Bernie Thompson <bernie@plugable.com>
Date: Sun, 5 Sep 2010 23:35:31 +0000 (-0700)
Subject: staging: udlfb: support for writing backup EDID to sysfs file
X-Git-Tag: v2.6.37-rc1~60^2~3^2~675
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8ef8cc4fca4a92e77c0b5aa7a852a6c3d2fba844;p=pandora-kernel.git

staging: udlfb: support for writing backup EDID to sysfs file

Support writing default/backup edid via /sys/class/graphics/fb?/edid

Writing a backup edid blob to the 'edid' file will cause udlfb to
attempt to re-read the edid from hardware.
If we still don't have a good edid, it will use the backup edid instead.
The intent is to 1) enable user-supplied edid
2) enable udev rules to backup the last known good edid
for a device, and then provide that edid as a backup for all future starts

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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