Re: [Ksummit-discuss] Draft agenda for the kernel summit

[Sakari Ailus <sakari.ailus@iki.fi>]

Hi Mauro and Mark,

(Fixed Mark's e-mail.)

On Tue, Oct 20, 2015 at 01:34:43PM -0200, Mauro Carvalho Chehab wrote:
> Em Tue, 20 Oct 2015 14:22:09 +0100
> Mark Brown <broonie@kernel.org> escreveu:
> 
> > On Tue, Oct 20, 2015 at 12:55:37PM +0100, Liam Girdwood wrote:
> > > On Mon, 2015-10-19 at 14:46 -0600, Shuah Khan wrote:
> > 
> > > > You can find the media graph that includes ALSA Mixer Function and
> > > > Control Interface (Device: /dev/snd/controlC2), PCM Audio Capture
> > > > Function and PCM Audio Capture interface (Device: /dev/snd/pcmC2D0c)
> > > > at:
> > 
> > > > https://drive.google.com/open?id=0B0NIL0BQg-AlbjZkcElJb2RtVk0
> > 
> > > Looks nice. Fwiw, the graph will probably get a lot bigger when we show
> > > the audio DSP and codec paths (as DSPs and codecs have multiple muxes
> > > and mixers). It may be good to have a cmd line option to stop at certain
> > > nodes on the graph to avoid over populated/complex graphs ?
> > 
> > Having the ability to describe which physical device things are part of
> > would probably help a lot with the rendering here - I'm guessing that a
> > lot of filtering is likely to be things like collapsing down devices not
> > being looked at right now into a single block in the graph and it'd
> > probably help with user comprehesibilty provide a mapping back to things
> > they can see in the physical world.
> > 
> > This doesn't entirely correspond with struct device due to MFD and
> > multi-function USB stuff but it'd be a good start I expect.
> 
> Yeah, collapsing devices make sense.
> 
> Sakari is working on a properties API to be added to Media
> Controller entities/interfaces/links. Perhaps he could add this
> requirement to the API he's working with.

I think that's entirely possible. It's up to how we want to describe
devices. I wonder if we could e.g. add a sysfs path as a property there. The
user would then need to check which entities have equal sysfs paths.

-- 
Regards,

Sakari Ailus
e-mail: sakari.ailus@iki.fi	XMPP: sailus@retiisi.org.uk