DXGK_PRE_START_INFO structure (dispmprt.h)

Structure to allow very simple data to be exchanged between the OS and driver which may be required prior to start device being called and therefore cannot be queried through normal caps or adapter info DDIs.

Syntax

typedef struct _DXGK_PRE_START_INFO {
  union {
    struct {
      UINT ReservedIn;
    };
    UINT Input;
  };
  union {
    struct {
      UINT SupportPreserveBootDisplay : 1;
      UINT IsUEFIFrameBufferCpuAccessibleDuringStartup : 1;
      UINT ReservedOut : 30;
    };
    UINT Output;
  };
} DXGK_PRE_START_INFO, *PDXGK_PRE_START_INFO;

Members

ReservedIn

This value is reserved for system use.

Input

The combined UINT value operated on.

SupportPreserveBootDisplay

Flag which indicates support for preserving the timing and content of the firmware display mode across DxgkDdiStartDevice.

IsUEFIFrameBufferCpuAccessibleDuringStartup

Indicates that the driver can maintain same CPU virtual address mapping to the UEFI frame buffer during driver initialization.

ReservedOut

This value is reserved for system use.

Output

The combined UINT value operated on.

Requirements

Requirement	Value
Header	dispmprt.h