4k60 CSI Bandwidth Requirements?

I’m unclear on CSI bandwidth requirements. Based on bandwidth I assume a single csi2.0 x4 channel should be sufficient for a 4k60 camera, is this correct?

I assume you mean the preview? What’s the output format of this 4k60 camera?
Bandwith of CSI2.0x4 is 6 Gbps maximum, so TX1 supports 24bpp, 2k@60Hz preview at most.