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When servo_v4 acts as a debug test system (DTS) its expected use case is for triggering CCD mode and Faft testing. To that end, its desired default data role is to be a UFP so that the enet and USB port are accessible by the DUT. However, when servo is acting a regular SRC port, it makes more sense for the data role pairing to be consistent with a normal SRC port device which is SRC/DFP. BUG=b:64720447 BRANCH=servo TEST=Tested with Eve using twinkie USB PD analyzer. Verified that when DTS mode is enabled a data role swap request is sent to the DUT and when DTS mode is disabled that servo_v4 does not send a data role swap request. Change-Id: I071f85fc99f1c877d86ef48ec7fa38d6850d5679 Signed-off-by: Scott Collyer <scollyer@google.com> Reviewed-on: https://chromium-review.googlesource.com/615813 Commit-Ready: Scott Collyer <scollyer@chromium.org> Tested-by: Scott Collyer <scollyer@chromium.org> Reviewed-by: Nick Sanders <nsanders@chromium.org>
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