Sam Hurst 01a99552df PD: Leave Vbus ON if Vconn and Vbus Requested is set to 0 in the AMA VDO
While troubleshooting why a generic $19.99 Multiport (USB, HDMI, Type-C)
Type-C dongle didn't work on Scarlet, I noticed that Vconn Req and Vbus
Req were both set to zero in the AMA VDO. For a better user experience,
default to Vbus ON if both Vconn and Vbus Req are both zero.

BUG=b:78286905
BRANCH=NONE
TEST=manual
Tested the generic dongle with USB-Keyboard, TypeC power adapter,
and HP monitor.

Change-Id: I170eef1372c3621334de2c457bd4533eea744cc0
Signed-off-by: Sam Hurst <shurst@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1019611
Commit-Ready: Sam Hurst <shurst@google.com>
Tested-by: Sam Hurst <shurst@google.com>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
2018-04-25 14:40:45 -07:00
2018-04-25 14:40:42 -07:00
2017-08-07 19:29:13 -07:00
2017-07-08 20:38:53 -07:00
2017-10-10 22:13:43 -07:00
2018-04-24 13:31:30 -07:00
2018-04-24 18:53:13 -07:00
2012-05-11 09:11:52 -07:00
2014-04-02 19:58:53 +00:00
2017-11-16 21:07:40 -08:00

For an overview of the Embedded Controller firmware, refer to

http://www.chromium.org/chromium-os/2014-firmware-summit

For instructions on building from source, refer to

http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly
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