Oh - I've not noticed that jumper before! I suspect it emulates the special OTG cables with a built-in resistor(?), for situations where you want the USB interface to auto-detect which role to be in. Whether it's configured manually or automatically, you still need to enable that USB controller on that connector, which is what the "dwc2" overlay does. However, in order to activate mass storage gadget mode properly you also need to persuade the kernel not to access the medium (SD Card, EMMC), which is why you need something like the mass-storage-gadget image provided as part of the usbboot suite.
Statistics: Posted by PhilE — Wed Dec 11, 2024 4:22 pm