---
name: "drm_crtc_vblank_on"
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_crtc_vblank_on"
---

# drm\_crtc\_vblank\_on(9)

enable vblank events on a CRTC

## NAME

drm\_crtc\_vblank\_on - enable vblank events on a CRTC

## SYNOPSIS

**void drm\_crtc\_vblank\_on(struct drm\_crtc \*** *crtc***);**

## ARGUMENTS

*crtc*

CRTC in question

## DESCRIPTION

This functions restores the vblank interrupt state captured with **drm\_vblank\_off** again. Note that calls to **drm\_vblank\_on** and **drm\_vblank\_off** can be unbalanced and so can also be unconditionaly called in driver load code to reflect the current hardware state of the crtc.

This is the native kms version of **drm\_vblank\_on**.

## 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