vblankoffdelay     92 drivers/gpu/drm/drm_vblank.c module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600);
vblankoffdelay     94 drivers/gpu/drm/drm_vblank.c MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs] (0: never disable, <0: disable immediately)");