Upps, I was too quick on posting this. That image is with a boot loader for normal Banana with A20 but the kernel which is inside is the correct one.
Use the image from download section (that one works!) and install a kernel and DTB pack from test/h3 directory. This is not from mainline but from other sources so I am not sure OTG is already in but worth trying.
I'll compile from mainline later when got back in office and put to /test dir.
In any case use image from download section and change kernel(s).
EDIT:
Use this kernel upgrade. You can install all debs since there is a u-boot for M2 too.
http://mirror.igorpecovnik.com/test/m2-debs.zip
deadmetaphor reacted to Igor in Banana Pi M2: USB Peripheral Driver UDC
deadmetaphor got a reaction from Igor in Banana Pi M2: DTBs was not build