From: Alex Deucher <alexdeucher@gmail.com>
Date: Wed, 23 Mar 2011 08:10:10 +0000 (+0000)
Subject: drm/radeon/kms: fix hardcoded EDID handling
X-Git-Tag: v2.6.37.6~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b752dd3db00682bbd33a886d5c62eb4db3bd0d3;p=pandora-kernel.git

drm/radeon/kms: fix hardcoded EDID handling

commit fafcf94e2b5732d1e13b440291c53115d2b172e9 upstream.

On some servers there is a hardcoded EDID provided
in the vbios so that the driver will always see a
display connected even if something like a KVM
prevents traditional means like DDC or load
detection from working properly.  Also most
server boards with DVI are not actually DVI, but
DVO connected to a virtual KVM service processor.
If we fail to detect a monitor via DDC or load
detection and a hardcoded EDID is available, use
it.

Additionally, when using the hardcoded EDID, use
a copy of it rather than the actual one stored
in the driver as the detect() and get_modes()
functions may free it if DDC is successful.

This fixes the virtual KVM on several internal
servers.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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