Would it be possible to turn a Pi + HDMI display into a USB monitor? The Pi with the monitor would act as a 2nd display.
(note that I'm not looking to avoid buying a USB monitor, I want to build an external gadget that incorporates a 2nd display)
I see that the Pi can act as a USB OTG "gadget"/device: https://gist.github.com/gbaman/50b6cca61dd1c3f88f41 But I don't see monitor listed.
I see that the PiKVM has chosen to incorporate hardware HDMI capture https://pikvm.org/ But this could be because USB monitors aren't supported at say, the bios screen, which is required for their use case.
Is it technically possible?
Do USB monitors require a special driver on Windows, or are they a standard USB class device?
What kind of code would have to be written on the Pi side to support this if it can't do it already?
