As per that thread, I replaced the PS8740 with a PS8742B on the CY4531 baseboard.
I also modified the CCG3 firmware (disabled DP_DFP_SUPP and added a #define for DP_UFP_SUPP As suggested here).
I have the USB-C source (a CY4541) successfully powering the CY4531, but I'm hoping to also pass over the DisplayPort video coming from the CY4541, into the USB-C connector on the CY4531, and then put the video out to a monitor via the DisplayPort connector J4 on the CY4531. Basically, I want this:
Which is essentially a USB-C to DP dongle. Right now I'm just using the USB-C power to power the CY4531, and not the monitor as well. The monitor is on its own AC power.
I know this cannot be done on the unmodified CY4531, but I was under the impression I could make this happen with the replacement of the PS8740 with a PS8742B as well as the modification of the firmware and configuration.
Should I be able to make this happen with what I have here (and it's just an issue with my configuration of the CCG3?), or have I misunderstood what is actually possible with these kits? Could using a DP to DVI adapter from the CY4531 to the monitor be causing a problem?
I notice the firmware still reports NOTEBOOK for the CY4531, is that something I need to change through device Firmware/Configuration to get this working?
I have attached the config I am currently using. I'm sure there's probably something wrong with it since all this USB-C is new territory for me .