TPS25750: If I want to work on source mode, how can I config the BQ25792 registers by using TPS25750?

Part Number: TPS25750
Other Parts Discussed in Thread: BQ25792, BQ25750, , TPS65987EVM

Hello Sir:

We have one USB-PD-CHG-EVM-01 board on hand.

We have been tried several times, after device asking voltage to 9V/15V/20V, any rails, that BQ25792 will not change the voltage.

Would you please let us know how to change the OTG voltage of BQ25792 by using BQ25750?

Do you have a guide line? can you share it for us?

Looking forward your feedback.

Thanks a lot.