XHCI is capable of supporting hardware LPM in modern Intel platforms. For example, the following sysfsentry confirms that the hardware USB port 3-1 is capable of supporting hardware LPM, you can get the port information for your system from the audio device enumeration logs in the dmesg output.
$ cat /sys/bus/usb/devices/3-1/power/usb2_hardware_lpm enabled
If the output value is disabled, you could enable LPM by writing 1 to the entry. The transition into LPM L1 mode can be confirmed through protocol traces.
Hello minhong ,
For APL nuc with model no NUC6CAYH, USB type A port near to Power button provides adb support .
Need Type –A to Type-A cable ,one end connects to nuc and other on host where android adb tools installed.