The following table shows the interaction between the HDMI 2.1 TX Interrupt controlling layer and the pass-through application. The user can use or modify the callbacks as per their requirement.
| HDMI 2.1 Interrupt Controller Layer Callback Handlers | Description |
|---|---|
| XV_TX_TRIG_HANDLER_CONNECTION_CHANGE | TX cable has been plugged in or plugged out ; this allows the pass-through application to make a decision of passing the rx data to tx or setting up the Test Pattern Generator |
| XV_TX_TRIG_HANDLER_SETUP_TXREFCLK | Programs the TX reference clock using a system i2c |
| XV_TX_TRIG_HANDLER_SETUP_AUDVID | Configures the video and audio sources and any software buffers |
| XV_TX_TRIG_HANDLER_STREAM_ON | TX is ready to transmit stream data |
| XV_TX_TRIG_HANDLER_ENABLE_CABLE_DRIVERS | Configure the drivers that interface between the board and HDMI cable, for example dp159. |
| XV_TX_TRIG_HANDLER_VSYNC_RECV | Vsync received on TX ; this allows for any operations to be performed, for example forwarding any data in a software buffer (such as info frames). |
| XV_TX_TRIG_HANDLER_STREAM_OFF | TX stream is down |
| XV_TX_TRIG_HANDLER_HDCP_FORCE_BLANKING | Request to disable sending HDCP decrypted content. |
| XV_TX_GET_FRL_CLOCK | Get FRL clock for TX ; this clock can be received from the receiver or an external source. |