DisplayPort Intel® FPGA IP User Guide

ID 683273
Date 4/29/2022
Public

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Document Table of Contents

9.77. btc_dptxll_mst_topology_discover

Prototype:

int btc_dptxll_mst_topology_discover(
BYTE tx_idx,
BTC_RAD *device_RAD)

Thread-safe:

No

Available from ISR:

No

Include:

< btc_dptxll_syslib.h >

Return:

0 = success, 1 = busy

Parameters:

  • tx_idx—Source instance index (0 - 3)
  • device_RAD—MST Relative Address of the device to start topology discovery from

Description:

This function starts topology discovery.

Example:

btc_dptxll_mst_topology_discover(0,&RAD);

The process performs the following steps:
  • Assigns a new GUID to sinks without one.
  • Traverses all the topology connected through device_RAD.
  • Adds each port found to the list of discovered ports.
  • For each output port with plug status asserted and messaging capabilities, collects full and available PBN.