Some ideas about tcpm driver

[Zain Wang]

Hi all,

In recent days, I tested the fusb302 driver with tcpm. (RK3399 evb board)
But I found an issues:
    There is not a regulator for type-c vbus power-supply in my board.
    The vbus is just controlled by a gpio-pin, and unable to support 
other voltage except 5V.
    But now, I can't use fusb302 driver without workaround fix.
    Could you fix it in next version? @Yueyao

The altmode looks not complete. I can't enter DP Alt Mode now.
And we'd like to used extcon function (used in Chrome) to link usb, dp 
and type-c together.
How do you think about it? @Guenter

Thanks
Zain