[PATCH v4 14/36] [media] v4l2-mc: add a function to inherit controls from a pipeline

Pavel Machek pavel at ucw.cz
Sat Mar 11 13:30:54 PST 2017


> > > Ok, perhaps supporting both subdev API and V4L2 API at the same
> > > time doesn't make much sense. We could disable one in favor of the
> > > other, either at compilation time or at runtime.  
> > 
> > Right. If the subdev API is disabled, then you have to inherit the subdev
> > controls in the bridge driver (how else would you be able to access them?).
> > And that's the usual case.
> > 
> > If you do have the subdev API enabled, AND you use the MC, then the
> > intention clearly is to give userspace full control and inheriting controls
> > no longer makes any sense (and is highly confusing IMHO).
> I tend to agree with that.

Well, having different userspace interface according to config options
is strange. I believe the right solution is to make complex drivers

(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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