The HDMI 2.1 TX Subsystem in general responds to the following two events:
- Hot-plug signal (HPD) from the sink device
- Software user application to indicate a change of video stream (for example, change of video resolution)
The main program flow is shown in the following figure. At execution, the software application initializes the HDMI 2.1 TX Subsystem IP and registers the callback functions in the provided hooks.