When configured with the AXI4-Stream interface, the subsystem is packaged with the following sub-cores:
- DisplayPort Transmitter core
- Video Timing Controller (VTC)
- DisplayPort AXI4-Stream to Video Bridge
- HDCP core with AXI Timer when HDCP feature is enabled
AXI4-Stream is defined in AXI4-Stream Video IP and System Design Guide (UG934). The benefit of using AXI4-Stream is that the video timing is removed from the bus. This allows for simpler clocking, small amounts of burstiness, improved debugging and for the core to verify the incoming data using internal locked signals.
Because the DisplayPort 1.4 TX Subsystem is hierarchically packaged, you select the parameters and the subsystem creates the required hardware. The subsystem includes a multi-pixel AXI4-Stream video protocol interface and outputs the video using the DisplayPort v1.4 protocol. The subsystem works with the Video PHY Controller ( Video PHY Controller LogiCORE IP Product Guide (PG230)) configured for the DisplayPort protocol. The following figure shows the subsystem architecture of the subsystem assuming MST with four video streams.