In ADAS applications using PoC, the cable shield acts as the return path for DC power supplied to the remote camera, and acts as the ground reference between the two systems. High energy interference events including ESD strikes and radiated antenna emissions can cause transient disruptions in the system ground reference between the serializer and deserializer device which result in bit errors. Make sure the cable shield is tied into the system ground on both sides of the FPD cable with as little inductance as possible to mitigate this effect. TI recommends to make sure that the connector ground pins are connected to the PCB ground plane on multiple layers with a solid connection rather than thermal relief splines.

Note how the recommended layout not only provides a direct connection for the connector GND pins to a large solid GND plane, but also how the GND plane is stitched to GND planes on other board layers with many vias. In this design, all 8 layers of the board contain a GND plane under the connector.