tree 19548438d80ae32b7b52470c84db163f85ad9083
parent 845de36df97e67e94ffb551840c2c0dc1e1fabdd
author Nico Huber <nico.h@gmx.de> 1479734042 +0100
committer Nico Huber <nico.h@gmx.de> 1483288465 +0100

gma: Probe sibling ports for improper connected displays

If an HDMI/DP display is detected, probe the sibling port that shares
physical pins too and bail out if something is detected. This is a
precaution for adapters that expose the pins of a port for both HDMI/
DVI and DP (like some ThinkPad docks). A user might have attached both
by accident and there are rumors of displays that got fried by apply-
ing the wrong signal.

Change-Id: I276ad55a353d60389bc36724d8af37b158ae4599
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/17755
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>