linux-kernel - Re: [RFC PATCH] [media]: of: move graph helpers from drivers/media/v4l2-core to drivers/of

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Date:	Fri, 21 Mar 2014 13:44:12 +0100
From:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:	Grant Likely <grant.likely@...aro.org>
Cc:	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Rob Herring <robherring2@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Philipp Zabel <philipp.zabel@...il.com>
Subject: Re: [RFC PATCH] [media]: of: move graph helpers from drivers/media/v4l2-core to drivers/of

Hi Grant,

On Friday 21 March 2014 08:15:34 Grant Likely wrote:
> On Fri, 21 Mar 2014 00:26:12 +0100, Laurent Pinchart wrote:
> > On Thursday 20 March 2014 23:12:50 Grant Likely wrote:
> > > On Thu, 20 Mar 2014 19:52:53 +0100, Laurent Pinchart wrote:
> > > > Then we might not be talking about the same thing. I'm talking about
> > > > DT bindings to represent the topology of the device, not how drivers
> > > > are wired together.
> > > 
> > > Possibly. I'm certainly confused now. You brought up the component
> > > helpers in drivers/base/component.c, so I thought working out
> > > dependencies is part of the purpose of this binding. Everything I've
> > > heard so far has given me the impression that the graph binding is tied
> > > up with knowing when all of the devices exist.
> > 
> > The two are related, you're of course right about that.
> > 
> > We're not really moving forward here. Part of our disagreement comes in my
> > opinion from having different requirements and different views of the
> > problem, caused by experiences with different kind of devices. This is
> > much easier to solve by sitting around the same table than discussing on
> > mailing lists. I would propose a meeting at the ELC but that's still a
> > bit far away and would delay progress by more than one month, which is
> > probably not acceptable.
> > 
> > I can reply to the e-mail where I've drawn one use case I have to deal
> > with to detail my needs if that can help.
> > 
> > Alternatively the UK isn't that far away and I could jump in a train if
> > you can provide tea for the discussion :-)
> 
> I'm game for that, but it is a long train ride. I'm up in Aberdeen which
> is 8 hours from London by train. Also, I'm travelling next week to
> California (Collaboration summit), so it will have to be in 2 weeks
> time.
> 
> Why don't we instead try a Google Hangout or a phone call today.
> Anywhere between 11:30 and 14:00 GMT would work for me. I'd offer to
> provide the tea, but I haven't quite perfected transporter technology
> yet.

That would work for me, but not today I'm afraid. Will you already be in 
California on Monday ?

-- 
Regards,

Laurent Pinchart

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