linux-kernel - Re: [PATCH v3 06/14] Documentation: drm/bridge: add document for analogix

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Message-ID: <20150825091534.GB14034@ulmo.nvidia.com>
Date:	Tue, 25 Aug 2015 11:15:36 +0200
From:	Thierry Reding <treding@...dia.com>
To:	Rob Herring <robherring2@...il.com>
CC:	Yakir Yang <ykk@...k-chips.com>, Heiko Stuebner <heiko@...ech.de>,
	"Jingoo Han" <jingoohan1@...il.com>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	"Inki Dae" <inki.dae@...sung.com>, Joe Perches <joe@...ches.com>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Sean Paul <seanpaul@...gle.com>, Takashi Iwai <tiwai@...e.de>,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	Andrzej Hajda <a.hajda@...sung.com>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	Vincent Palatin <vpalatin@...omium.org>,
	<linux-rockchip@...ts.infradead.org>,
	Kishon Vijay Abraham I <kishon@...com>,
	David Airlie <airlied@...ux.ie>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Doug Anderson <dianders@...gle.com>,
	"Rob Herring" <robh+dt@...nel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Mark Yao <mark.yao@...k-chips.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Daniel Kurtz <djkurtz@...gle.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Kumar Gala <galak@...eaurora.org>,
	Ajay kumar <ajaynumb@...il.com>,
	Andy Yan <andy.yan@...k-chips.com>
Subject: Re: [PATCH v3 06/14] Documentation: drm/bridge: add document for
 analogix_dp

On Sun, Aug 23, 2015 at 06:23:14PM -0500, Rob Herring wrote:
> On Wed, Aug 19, 2015 at 9:50 AM, Yakir Yang <ykk@...k-chips.com> wrote:
[...]
> > +       -analogix,link-rate:
> > +               max link rate supported by the eDP controller.
> > +                       LINK_RATE_1_62GBPS = 0x6, LINK_RATE_2_70GBPS = 0x0A,
> > +                       LINK_RATE_5_40GBPS = 0x14
> 
> Same here. I'd rather see something like "link-rate-mbps" and use the
> actual rate.

There is no need whatsoever to hard-code this in DT. (e)DP provides the
means to detect what rate the link supports and the specification
provides guidance on how to select an appropriate one.

> 
> > +       -analogix,lane-count:
> > +               max number of lanes supported by the eDP contoller.
> > +                       LANE_COUNT1 = 1, LANE_COUNT2 = 2, LANE_COUNT4 = 4
> 
> And drop the vendor prefix here.

Same as for the link rate.

Thierry

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