From a previous post (found here), we received a confirmation from NVIDIA regarding the maximum frame size that can be processed on the ISP for any of the Jetson family series devices (Nano, TX2, Xavier):
all these three Jetsons (Nano, TX2, Xavier series) has the same ISP capability, the max line buffer width as 6144.
you may also check TRM for the detail of CSI bandwidth,
Is this information available in any of the technical documents? I could not find a reference to it in the Xavier NX TRM