The HDMI 1.4/2.0 RX Subsystem in general responds to the following two events:
- HDMI Cable Detect (5v) from the source device
- HDMI Video Stream changes in the term of TMDS frequency change from the source device
The main program flow is shown in the following figure. At execution, the software application initializes the HDMI 1.4/2.0 RX Subsystem IP and registers the callback functions in the provided hooks.