linux-kernel - Re: [PATCH v2 05/10] drm/rockchip: analogix

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Date:	Wed, 25 May 2016 13:54:30 +0800
From:	Yakir Yang <ykk@...k-chips.com>
To:	Heiko Stuebner <heiko@...ech.de>,
	Doug Anderson <dianders@...omium.org>
Cc:	David Airlie <airlied@...ux.ie>, Inki Dae <inki.dae@...sung.com>,
	Mark Yao <yzq@...k-chips.com>,
	Thierry Reding <treding@...dia.com>,
	Jingoo Han <jingoohan1@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Javier Martinez Canillas <javier@....samsung.com>,
	Emil Velikov <emil.l.velikov@...il.com>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>
Subject: Re: [PATCH v2 05/10] drm/rockchip: analogix_dp: add rk3399 eDP
 support


On 05/25/2016 02:23 AM, Heiko Stuebner wrote:
> Am Dienstag, 24. Mai 2016, 11:12:20 schrieb Doug Anderson:
>> Hi,
>>
>> On Tue, May 24, 2016 at 3:17 AM, Heiko Stuebner <heiko@...ech.de> wrote:
>>>> --- a/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
>>>> +++ b/Documentation/devicetree/bindings/display/bridge/analogix_dp.txt
>>>>
>>>> @@ -5,6 +5,7 @@ Required properties for dp-controller:
>>>>                platform specific such as:
>>>>                 * "samsung,exynos5-dp"
>>>>                 * "rockchip,rk3288-dp"
>>>>
>>>> +              * "rockchip,rk3399-edp"
>>> the cleanlines-freak in my likes to know if there is a difference
>>> between
>>> the rk3399 being called -edp here and -dp on the rk3288 :-)
>>>
>>> [...]
>> If I was a guessing man (which I'm not, but if I was), I'd guess that
>> this is because on rk3288 there was only one DP port and it was an EDP
>> port.  ...but since there was only one people just referred to it as
>> the "DP" port and that was codified in the bindings.  On rk3399 there
>> are two ports: one EDP and one DP.  All of a sudden we need to
>> differentiate.
>>
>> Any better suggestions for how to deal with that?
> nope - everything as it should be in that regard then - the rk3288-dp is
> permanent now anyway.
>
> But it looks like I'm sort of blind blind and only now have seen the
> separate DP controller chapter in the TRM (probably because I somehow didn't
> expect a second controller).
RK3399 eDP controller have cut off the DP-Audio function and DP-HDCP 
function, so it can't be treated as DP interfaces any more, that's why I 
call it "eDP".
>
>