The link training commands are passed from the DPCD register block to the link training function. When set into the link training mode, the functional datapath is blocked and the link training controller issues the specified pattern. Care must be taken to place the Sink device in the proper link training mode before the source state machine enters a training state. Otherwise, unpredictable results might occur.
The following figure shows the flow diagram for link training. For details, see the VESA DisplayPort Standard (VESA website).