Re: [PATCH] Minimal libv4l2 support for complex cameras

[Mauro Carvalho Chehab <mchehab@kernel.org>]

Em Mon, 23 Mar 2020 14:24:42 +0200
Laurent Pinchart <laurent.pinchart@ideasonboard.com> escreveu:

> Hi Pavel,
> 
> On Mon, Mar 23, 2020 at 01:22:17PM +0100, Pavel Machek wrote:
> > > On Mon, Mar 23, 2020 at 12:47:27PM +0100, Pavel Machek wrote:
> > >> Hi!
> > >> 
> > >> We now have easy-to-install support for complex camera in form of
> > >> Maemo Leste on N900.... Unfortunately we don't have anything in
> > >> userspace that can be used to work with the camera.
> > >> 
> > >> This attempts to be minimal solution to get libv4l2 to work.
> > > 
> > > libv4l2 is mostly deprecated.

Well, not really... I guess lots of userspace apps rely on it
(qv4l2, xawtv, tvtime, camorama, zbar, ...).

In order to be able to deprecate it, we need to add some code there
to let them bind via libcamera and test them with different hardware,
including the non-UVC ones.

> > > How about contributing an OMAP3 ISP
> > > pipeline handler to libcamera instead ? :-)
> > 
> > Why should it be instead?
> > 
> > I need something for kernel testing, and there is ton of apps using
> > it. Let me do this. libcamera might be future, but...
> 
> Sure, if it's useful for you, I won't prevent you from developing any
> code you want :-) But there's very little chance of getting it merged,
> and it would be useful to more people to have a support for that
> platform in libcamera. It's really your decision, and I'm not blaming
> you.

I created some time ago a fork of v4l-utils in order to be able to
merge the N900 work from Pavel. We can add the N900 work there - or 
on a separate branch at the main v4l-utils tree.

Thanks,
Mauro