THhe problem is that Video over USB-C is always DisplayPort, not HDMI. HDMI as Alternate Mode is defined, but nobody uses it.Does something like this exist? I looked around but couldn't find anything.
So you need something that takes HDMI, DSI (unless OP is using a zero series Pi), or DPI then converts it to Displayport and tunnels it over a USB C cable.
All while letting the Pi act as a USB host on the same cable so that the touchscreen works.
It'll also need to send any EDID (or equivalent) from monitor to Pi. I've no idea how that's done in displayport alt mode.
And handle any PD negotiation required for, power mode, host/device mode, USB C alt mode, etc.
Then again, as the OP hasn't provided any links to the monitors they're talking about, they could be using Displaylink (think VNC over USB though that's a simplification) and there's no support on Pi (or most Linux distros) for anything more recent than v1.X (IIRC there was a closed source binary driver for v2 displays on Ubuntu on x86 but I've never used it).
TBH, depending on the physical size of display required I'd be looking at the RPL 15", 7", or 5" displays. Or third party touchscreens interfacing over SPI, DPI, HDMI, DSI, etc.
Statistics: Posted by thagrol — Sat Nov 15, 2025 12:06 am