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Message-ID: <20160203204730.GH3327@lukather>
Date: Wed, 3 Feb 2016 21:47:30 +0100
From: Maxime Ripard <maxime.ripard@...e-electrons.com>
To: Rob Herring <robh@...nel.org>
Cc: Mike Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...eaurora.org>,
David Airlie <airlied@...ux.ie>,
Thierry Reding <thierry.reding@...il.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
linux-clk <linux-clk@...r.kernel.org>,
dri-devel <dri-devel@...ts.freedesktop.org>,
linux-sunxi <linux-sunxi@...glegroups.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Chen-Yu Tsai <wens@...e.org>,
Hans de Goede <hdegoede@...hat.com>,
Alexander Kaplan <alex@...tthing.co>,
Boris Brezillon <boris.brezillon@...e-electrons.com>,
Wynter Woods <wynter@...tthing.co>,
Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
Rob Clark <robdclark@...il.com>,
Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCH v2 17/26] drm: sun4i: Add DT bindings documentation
On Wed, Feb 03, 2016 at 02:19:31PM -0600, Rob Herring wrote:
> >> > +Required properties:
> >> > + - compatible: value must be one of:
> >> > + * allwinner,sun5i-a13-display-engine
> >> > + - allwinner,pipelines: list of phandle to the entry points of the
> >> > + pipelines (either to the frontend or backend)
> >> > +
> >> > +Example:
> >> > +
> >> > +panel: panel {
> >> > + compatible = "olimex,lcd-olinuxino-43-ts";
> >>
> >> This should either be a child of what it is attached to or use of-graph.
> >
> > You had a similar discussion with Thierry last time I sent it, and it
> > seemed to settle on keeping that property:
> >
> > http://lists.infradead.org/pipermail/linux-arm-kernel/2015-October/382115.html
> >
> > Has that changed?
>
> No, I still disagree. We already have 2 ways to describe panels: as a
> child node of its controller or with of-graph. We don't need a 3rd way
> even if it is simple. The problem with of-graph today is too much of
> the parsing is left to the individual drivers. We need to fix that and
> make it be handled by common code.
Ok. I'm guessing from your answer you prefer of-graph over a child
node ?
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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