On 25/07/17 10:53 PM, sunpeng.li at amd.com wrote: > From: Amy Zhang <Amy.Zhang at amd.com> > > - Make sure Vsync interrupts are disabled in static screen case > and enabled when not to save power What exactly does this mean? FWIW, the interrupt whose handler calls drm_handle_vblank() must be enabled from when the drm_driver::enable_vblank hook is called until when the drm_driver::disable_vblank hook is called. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer