Dear All, I'm confused by the USB gadget mode on the recent Intel SoCs, such as Gemini Lake. The /sys/class/udc is empty, and a SoC can't present itself as a IoT gadget this way, yet definitely being designed as such. I've noticed the concept of dual-role-device, which seems to replace the OTG. Particularly, Harry Pan mentioned that Gemini Lake supports DRD in port 0. Indeed, if I do: sudo sh -c "echo device >/sys/class/usb_role/intel_xhci_usb_sw-role-switch/role" then one of the ports gets successfully recognized as a new USB device, if connected with a cable to another laptop. But I'm wondering, how exactly could I construct a logical device class for this case, e.g. similarly to uvc gadget for OTG? Completely lacking any example of code, currently it's a big confusion. Thanks & Kind regards, - Dmitry.
