The DisplayPort source controller is responsible for managing the link and physical layer functionality. The controller packs audio/video data into transfer units or micro packets and sends them over the main link. The link rate and lane counts can be selected based on the application bandwidth requirements.
The DisplayPort v1.2 protocol supports up to four lanes at a 5.4G line rate and includes audio support. The DisplayPort controller only supports up to two lanes at a 5.4G line rate. It does not support multi-stream transport or other optional features.
The source core is partitioned into three blocks.
•Main link: Provides for the delivery of the primary video stream.
•Secondary link: Integrates the delivery of audio information into the main link blanking period.
•AUX channel: Establishes the dedicated source-to-sink communication channel.
This Figure shows the blocks of the DisplayPort source controller.