---
name: "drm_vblank_count"
section: "9"
platform: "linux"
package: "linux-manual-3.16"
version: "3.16.56-1+deb8u1"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/drm_vblank_count"
---

# drm\_vblank\_count(9)

retrieve “cooked” vblank counter value

## NAME

drm\_vblank\_count - retrieve “cooked” vblank counter value

## SYNOPSIS

**u32 drm\_vblank\_count(struct drm\_device \*** *dev***, int** *crtc***);**

## ARGUMENTS

*dev*

DRM device

*crtc*

which counter to retrieve

## DESCRIPTION

Fetches the “cooked” vblank count value that represents the number of vblank events since the system was booted, including lost events due to modesetting activity.

## RETURNS

The software vblank counter.

## AUTHORS

**Jesse Barnes** \<jesse.barnes@intel.com\>\
 Intel Corporation,

Initial version

**Laurent Pinchart** \<laurent.pinchart@ideasonboard.com\>\
 Ideas on board SPRL,

Driver internals

**Daniel Vetter** \<daniel.vetter@ffwll.ch\>\
 Intel Corporation,

Contributions all over the place

## COPYRIGHT