4 lane mipi csi2 to 2 lane mipi interface

Hi ,
I have to interface to camera modules with Jetson Xavier NX. But my carrier board offers one 4 lane mipi cs-2 interface and one 2 lane mipi cs -2 interface. In my case I require for 2 identical camera set with exactly same parameters.
So how can I interface a 4 lane Mipi port with 2 lane camera?
Is some kind of adapter available?
how can proceed?

Have a check this design guide.