this adds control over the USB high speed muxes as a function of DP
HPD. this allows an external monitor to be added/removed with
chromeos extending the display as appropriate.
BUG=b:77151172
BRANCH=none
TEST=chromeos detects external monitor plugin and extends display
Change-Id: I7df7a8136ddaa4eeaca800d29b46350dafd8f838
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1009208
Commit-Ready: Caveh Jalali <caveh@google.com>
Tested-by: Caveh Jalali <caveh@google.com>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Duncan Laurie <dlaurie@google.com>
5b521e3ac6