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From: Grant Likely <grant.likely@linaro.org>
Subject: Re: [RFC PATCH] [media]: of: move graph helpers from drivers/media/v4l2-core to drivers/of
To: Tomi Valkeinen <tomi.valkeinen@ti.com>,
        Philipp Zabel <p.zabel@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>, Rob Herring <robherring2@gmail.com>,
        Russell King - ARM Linux <linux@arm.linux.org.uk>,
        Mauro Carvalho Chehab <m.chehab@samsung.com>,
        Rob Herring <robh+dt@kernel.org>,
        Sylwester Nawrocki <s.nawrocki@samsung.com>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Kyungmin Park <kyungmin.park@samsung.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-media@vger.kernel.org" <linux-media@vger.kernel.org>,
        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
        Philipp Zabel <philipp.zabel@gmail.com>
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Date: Sat, 08 Mar 2014 01:06:45 +0800
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On Thu, 27 Feb 2014 10:36:36 +0200, Tomi Valkeinen <tomi.valkeinen@ti.com> wrote:
> On 26/02/14 16:48, Philipp Zabel wrote:
> 
> >> I would like the document to acknowledge the difference from the
> >> phandle+args pattern used elsewhere and a description of when it would
> >> be appropriate to use this instead of a simpler binding.
> > 
> > Alright. The main point of this binding is that the devices may have
> > multiple distinct ports that each can be connected to other devices.
> 
> The other main point with this binding are multiple endpoints per port.
> So you can have, say, a display controller, with single port, which has
> two endpoints going to two separate LCD panels.
> 
> In physical level that would usually mean that the same pins from the
> display controller are connected to two panels. Most likely this would
> mean that only one panel can be used at a time, possibly with different
> settings (say, 16 RGB pins for one panel, 24 RGB pins for the other).

What device is in control in that scenario?

g.