Hi Michael, On Wed, Apr 12, 2023 at 01:57:36PM +0200, Michael Riesch wrote: > 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. I think the documentation should be improved in this regard. Also cc Hans. -- Regards, Sakari Ailus
