On Mon, Oct 19, 2015 at 10:33:04AM -0200, Mauro Carvalho Chehab wrote:

> We did a Media Controller Summit in July. During the summit, it was
> pointed that other subsystems like IIO (Linux Industrial I/O) have
> similar needs and also need to track complex pipelines. 

> The goal of this tech topic is to present the MC next generation
> concepts and how the patches to support MC was written, showing some
> pipeline examples. 

> The next gen support patches were written in August, with some 
> additional patches written after that, and it has support for DVB
> and for one ALSA driver (snd-usb-audio).

> The patches are not merged yet at the media development tree and
> at -next, as one of the core developers of the media controller
> is missing time to review patches. So, while it was originally
> targeted to be merged on Kernel 4.4, it is likely that this will be 
> merged only for Kernel 4.5, in order to give him more time to
> review the patchset.

One fun thing on this that came up at the audio meeting we had in Dublin
after ELC-E is that there is some desire to export the internal topology
of audio devices to userspace using the same format that we're using to 
load topology information for DSP firmwares (see include/sound/soc-topoloy.h).
If we go ahead with that it'd create an alternative topology ABI, it
seems like we should at least consider if it's worth trying to share
things here.

I've not had a chance to look at the new media controller work yet, I've
CCed Lars and Liam who have more knowledge in this area.  Unfortunately
I don't think any of the people working directly on this will be at KS
this year.