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DXGKDDI_DPAUXIOTRANSMISSION callback function ()

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The DXGKDDI_DPAUXIOTRANSMISSION callback reads or writes DisplayPort Configuration Data (DPCD) for devices directly attached on the GPU.

Syntax

DXGKDDI_DPAUXIOTRANSMISSION DxgkddiDpauxiotransmission;

NTSTATUS DxgkddiDpauxiotransmission(
  HANDLE Context,
  PDXGKARG_DPAUXIOTRANSMISSION pArgs
)
{...}

Parameters

Context

Context pointer provided when querying the interface.

pArgs

Pointer to a DXGKARG_DPAUXIOTRANSMISSION structure.

Return value

DXGKDDI_DPAUXIOTRANSMISSION returns STATUS_SUCCESS if it succeeds; otherwise it returns an error code such as one of the following:

Error Code Meaning
STATUS_DRIVER_INTERNAL_ERROR An internal software error occurred.
STATUS_ACCESS_DENIED The request is not supported. For Windows 10 version 2004, only native AUX read is supported.
STATUS_BUFFER_TOO_SMALL The buffer is too small for the operation.
STATUS_DEVICE_HARDWARE_ERROR A hardware error occurred.
STATUS_DEVICE_POWERED_OFF The device is powered off.
STATUS_DEVICE_NOT_CONNECTED The device is not connected.
STATUS_DEVICE_PROTOCOL_ERROR An error occurred at the DP AUX protocol level. The driver can use DPNativeError to encode more details about the error.

Remarks

Write operations are not supported in Windows 10, version 2004 and should be blocked.

Requirements

Requirement Value
Minimum supported client Windows 10, version 2004

See also

DXGKARG_DPAUXIOTRANSMISSION