Controller chip for charging on X390 Yoga?

It charges over USB-C, and has a buck-boost controller which can charge from 5 volts at 1.65 amps (ie. super slow - 8 watts).

However, my USB supply can do 3 amps @ 5 volts, and it looks like the mosfets and inductor on the motherboard should also be able to do that. Are there any registers I can poke to say "just charge at 3 amps, and don't worry about USB-PD negotiation?"

Looks like I'll need to go through the embedded controller - does it have any debug interface for this sort of thing?