// d3dkmddi.h

typedef enum _DXGK_CRTC_VSYNC_STATE {
  DXGK_VSYNC_ENABLE = 0,
  DXGK_VSYNC_DISABLE_KEEP_PHASE = 1,
  DXGK_VSYNC_DISABLE_NO_PHASE = 2
} DXGK_CRTC_VSYNC_STATE;
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Windows Driver Kit DDI reference (ne-d3dkmddi-_dxgk_crtc_vsync_state)

DXGK_CRTC_VSYNC_STATE enumeration

Description

The DXGK_CRTC_VSYNC_STATE enumeration provides additional information for DxgkDdi_ControlInterrupt2 when VSYNC is being utilized.

Constants

`DXGK_VSYNC_ENABLE:0`

Indicates that the VSYNC interrupt is enabled and will call into the interrupt callback whenever a display target enters the VBLANK state.

`DXGK_VSYNC_DISABLE_KEEP_PHASE:1`

Indicates that the VSYNC interrupt is disabled and the display driver will ensure that any request to re-enter the VSYNC enabled state will do so in the phase of interrupts prior to disable.

`DXGK_VSYNC_DISABLE_NO_PHASE:2`

Indicates that the VSYNC interrupt is disabled, but that the display driver will not require re-entering the VSYNC enabled state in phase of prior interrupts.

DXGK_CRTC_VSYNC_STATE - NtDoc