I buy two Banana Pi M2 Zero to do some tests with the Pi Camera V2.1 and i realize that it’s not compatible, i don’t understand why it’s only compatible with Ov5640, if it can communicate with one camera, it has to be able to communicate with another with some adapter.
make sure your ov2640 24pin have the compatiable pin define with m2 zero csi connector, as i known, most of the ov module 24 pin connector is opposite to m2 zero csi connector.