DisplayPort Alt mode is one of the alternate modes supported by USB Type-C. DisplayPort Alt. Mode allows for DisplayPort video and audio data to be sent through the USB Type-C connector. There are two modes of DisplayPort Alt. Mode that are very commonly used.

1. Full DP mode: In this mode all high speed differential pairs of the USB Type-C connector TX1, RX1, TX2, and RX2 output DisplayPort data. There is no USB3.x functionality as all the AC coupled differential pairs are used for DisplayPort transmission. However, the USB2.0 path is uninterrupted, so USB2.0 functionality remains in this mode.
2. DP x USB mode: In this mode both USB3.x and DisplayPort is functional. This mode uses one TX and RX pair for full-duplex USB3.x communication, and the second TX and RX pair is used to transmit DisplayPort video and audio data.