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

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Date:	Tue, 11 Feb 2014 14:52:48 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Rob Herring <robherring2@...il.com>
Cc:	Philipp Zabel <p.zabel@...gutronix.de>,
	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Tomi Valkeinen <tomi.valkeinen@...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

On Tue, Feb 11, 2014 at 07:56:33AM -0600, Rob Herring wrote:
> On Tue, Feb 11, 2014 at 5:45 AM, Philipp Zabel <p.zabel@...gutronix.de> wrote:
> > This allows to reuse the same parser code from outside the V4L2 framework,
> > most importantly from display drivers. There have been patches that duplicate
> > the code (and I am going to send one of my own), such as
> > http://lists.freedesktop.org/archives/dri-devel/2013-August/043308.html
> > and others that parse the same binding in a different way:
> > https://www.mail-archive.com/linux-omap@vger.kernel.org/msg100761.html
> >
> > I think that all common video interface parsing helpers should be moved to a
> > single place, outside of the specific subsystems, so that it can be reused
> > by all drivers.
> 
> Perhaps that should be done rather than moving to drivers/of now and
> then again to somewhere else.

Do you have a better suggestion where it should move to?

drivers/gpu/drm - no, because v4l2 wants to use it
drivers/media/video - no, because DRM drivers want to use it
drivers/video - no, because v4l2 and drm drivers want to use it

Maybe drivers/of-graph/ ?  Or maybe it's just as good a place to move it
into drivers/of ?

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