Hi Sakari, On 4/12/23 13:50, Sakari Ailus wrote: > Hi Michael, > > On Wed, Apr 12, 2023 at 10:00:26AM +0200, Michael Riesch wrote: >> - Different controls: If moving = (V4L2_CID_FOCUS_ABSOLUTE == current), >> then what happens if the application performs a >> V4L2_CID_FOCUS_RELATIVE with -3? current should reach 39, >> V4L2_CID_FOCUS_ABSOLUTE is still at 42, the lens is still moving from >> the application's point of view. > > Would there be a reason to implement both of these controls in a single > driver? AFAIU, the relative one should be used if there absolute value > isn't known to the driver. Probably not, but on the other hand there is nothing the prevents a driver developer from doing so, right? Point is that should there be a driver which does implement both controls, we are in trouble AFAIU. Best regards, Michael
