Hello Ko-hey,
The latest linux BSP doesn't support to display 2-camera image(one is for MIPI, the other is for CSI) at the same time. But we have a solution called 'surround view patch' which supports 4-camera input and display 4-channel images. For more information, see the following link, please!
https://community.nxp.com/docs/DOC-328548
Best Regards,
weidong