On Sat, Apr 18, 2020 at 12:14:09PM +0900, Sunyoung Kang wrote: > Exynos video codec driver uses reserved2 value. How will reserved2 be used > for future use? No driver should be using the "reserved" fields, as they are "reserved" by the api for future expansion of it. They are not driver-specific fields to be used that way at all. thanks, greg k-h