HDMI Intel® FPGA IP User Guide

ID 683798
Date 4/22/2022

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6.4. Link Training Procedure

The HDMI RX core includes a state machine for link training process.

Sink will always request link training pattern 0x5678. These link training patterns start with 4 Scrambler Reset (SR) characters followed by 4096 encoded and scrambled data. After receiving the SR characters, the HDMI RX core achieves alignment and lane deskew lock to qualify the received link training pattern.

After detecting the pattern, sink will set link training pattern 0x0000 indicating link training passed.

Figure 62. Sink Link Training State Machine Flow Diagram