I am using CLI version of your ROCK 3A Debian bullseye.
Which option in rsetup is best for clone OV5647?
I have in rsetup:
[ ] Enable OKdo 5MP Camera
[ ] Enable Radxa Camera 8M
[ ] Enable Raspberry Pi Camera v1.3
[ ] Enable Raspberry Pi Camera v2
And I have tried all but am not getting detection.
With Okdo 5MP overlay, I heard IR clicks from the camera so have kept that one. With it fswebcam responds:
Error selecting input 0
VIDIOC_S_INPUT: Inappropriate ioctl for device
Is this related to this comment?:
https://forum.radxa.com/t/ov5647-camera-on-cm3-using-rpi-io-board/14619/2?u=allodyne
… because I have no idea how to do that 
Thanks!