Noralf Trønnes wrote: > Provide a way for userspace to choose synchronous flushing/pageflips. > This helps save CPU and power. > > It is also useful for test scripts since userspace can know when a flush > has happended and wait before doing the next visual test. > > Cc: Peter Stuge <peter@xxxxxxxx> > Cc: Linus Walleij <linus.walleij@xxxxxxxxxx> > Signed-off-by: Noralf Trønnes <noralf@xxxxxxxxxxx> Reviewed-by: Peter Stuge <peter@xxxxxxxx>