From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 31 May 2012 12:08:53 +0000 (+0100)
Subject: drm/i915/crt: Do not rely upon the HPD presence pin
X-Git-Tag: v3.5-rc2~11^2~1^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9e612a008fa7fe493a473454def56aa321479495;p=pandora-kernel.git

drm/i915/crt: Do not rely upon the HPD presence pin

Whilst most monitors do wire up the HPD presence pin, it seems quite a
few KVM do not. Therefore if we simply rely on the HPD pin being
asserted to indicate a connected monitor we fail miserable, so fall back
to performing a DCC query for the EDID.

Reported-and-tested-by: Matthieu LAVIE <boiteamadmax@hotmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=50501
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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