Status of PD support during u-boot

[Dante4]

You already have answers for about half of your questions in meta-thread regarding PD.

Rock5 does not work on most PD power supplies

R6S USB C is not a full functional USB C, only power PD, which is similar as ROCK Pi 4B, it’s hardware negotiation. ROCK 5B is full functional PD with USB 3, Display, fully controlled by RK3588, you can communicate with the power supply under Linux, change the power supply voltage etc. The drawback is the software PD stack under Linux is not matured yet, it takes time to improve the compatibility with all the PD adapters on the market.