Hi : I connect Friendlyarm's USB CAM "FA-CAM202" to USB2 pins , the V4l application shows
Unable to start capture: Input/output error
i: Error grabbing frames

And dmesg shows
uvcvideo: Failed to query (GET_CUR) UVC control 3 on unit 1: -32
uvcvideo: Failed to set UVC commit control : -32 (exp. 26)

The OS I am using is Armbian's Armbian Bionic mainline kernel 4.14.y.

Notes that, my Logitech USB CAM works fines under the same configuration.
and the FA-CAM202 proofed worked on PC.