drm_vblank_put — release ownership of vblank events
| void drm_vblank_put ( | struct drm_device * dev, | 
| unsigned int pipe ); | 
Release ownership of a given vblank counter, turning off interrupts if possible. Disable interrupts after drm_vblank_offdelay milliseconds.
   This is the legacy version of drm_crtc_vblank_put.