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DP_Aux (DisplayPort Auxiliary Channel)

DP Aux Ch detects link, configuration, and status of a DisplayPort source. DisplayPort is the VESA digital display interface. The Auxiliary Channel is half-duplex and bidirectional. Supports DP 2.1 and eDP 1.5.

For channel-prefix differences, see Settings.

Decode Settings

Decode Settings

DP Aux Decode Settings
  • Channel: Assign the channel to decode.
  • Mode: Choose DP_Aux / HPD / PWR. Aux Option is field enabled (Enable) when Mode is DP_Aux. Default: DP_Aux.
  • Show DPCD: Show DisplayPort Configuration Data. Field enabled (Enable) version and encoding options when checked. Default: cleared.
    • DP Version: DP version (up to 2.1). Default: 1.0 (with DP Version selected).
    • eDP Version: eDP version (up to 1.5). Default: cleared (mutually exclusive with DP Version).
    • DPCD 00108h: Choose 8b/10b or 128b/132b encoding; field enabled (Enable) only when version conditions are met. Default: 8b/10b.
  • Show EDID: Show EDID information. Field enabled (Enable) when checked. Default: cleared.
  • Startup Transaction: Type of the first transaction (Request / Reply). Default: Request.

Result

Without DPCD:

DP Aux without DPCD

DP Aux without DPCD

With DPCD:

DP Aux with DPCD

DP Aux with DPCD

Accessories: analyze Aux, HPD, and PWR together

DP Aux accessories

Analyze Aux, HPD, and PWR together

See also