Has anyone got an ADV7281A-M working with ROCK CM3?

We need to get analog video into our Radxa CM3 and we have a lot of previous experience with ADV7281A-M with Pi4, etc. However we cannot get it to work with Radxa CM3. Our attempts have got as far as getting video0 device, but not streaming data.
Has anyone managed to get this IC with MIPI interface to the CM3?