// ucmtcpciportcontrollerrequests.h

// CTL_CODE(0x0058, 0x018, METHOD_BUFFERED, FILE_WRITE_ACCESS)
#define IOCTL_UCMTCPCI_PORT_CONTROLLER_DISPLAYPORT_HPD_STATUS_CHANGED 0x00588060
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Windows Driver Kit DDI reference (ni-ucmtcpciportcontrollerrequests-ioctl_ucmtcpci_port_controller_displayport_hpd_status_changed)

IOCTL_UCMTCPCI_PORT_CONTROLLER_DISPLAYPORT_HPD_STATUS_CHANGED IOCTL

Description

Notifies the client driver that the hot-plug detect status of the DisplayPort connection has changed so that the driver can perform additional tasks.

Parameters

Major code

Input buffer

A pointer to a UCMTCPCI_PORT_CONTROLLER_DISPLAYPORT_HPD_STATUS_CHANGED_IN_PARAMS structure that contains status information.

Input buffer length

The size of UCMTCPCI_PORT_CONTROLLER_DISPLAYPORT_HPD_STATUS_CHANGED_IN_PARAMS.

Output buffer

Output buffer length

Input/output buffer

Input/output buffer length

Status block

Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status to the appropriate error condition as a NTSTATUS code.

Remarks

The UcmTcpciCx class extension sends this IOCTL request when the DisplayPort mode status changes. The client driver can determine the new status based on the values passed in the supplied structure.

IOCTL_UCMTCPCI_PORT_CONTROLLER_DISPLAYPORT_HPD_STATUS_CHANGED - NtDoc