The DisplayPort TX block is delivered as part of the DisplayPort 1.4 TX Subsystem and contains the following components, also shown in the following figure:
- Main Link
- Provides delivery of the primary video stream.
- Secondary Channel
- Integrates the delivery of audio information into the Main Link blanking period.
- Link Layer
- Responsible for achieving isochronous transport services which includes key features like mapping stream data to link symbols in SST/MST modes of DP 1.4 and 2.x link rates.
- PHY Logical Sub-layer
- Responsible for scrambling, link training, inserting CDI bits (for 2.x), FEC (for 2.x), pre-coding (for 2.x) etc. as specified by VESA.
- AUX Channel
- Establishes the dedicated source to sink communication channel.
Figure 1. DisplayPort Transmit Core Block Diagram
