I’ve already done a big part, but now I’m faced with an issue:

[ 92.374493] rkisp rkisp-vir0: link validation failed for ‘rockchip-csi2-dphy0’:1 -> ‘rkisp-csi-subdev’:0, error -32

 I don't have much experience working with V4L2 stack. Can you help me and advise where I should dig in? 

I feel that possibly something wrong with the DT entry for this device, but I did my,  based on the working one, so I assume that the bus configuration should be ok. 

If you need any more data on my issue, please let me know.

Best regards,

Anton