linux-kernel - Re: [PATCH v6 00/14] Add eDP support for RK3588

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Message-Id: <59278550-BD6E-454C-AB31-084E13C19409@gmail.com>
Date: Thu, 13 Feb 2025 18:20:57 +0100
From: Piotr Oniszczuk <piotr.oniszczuk@...il.com>
To: Diederik de Haas <didi.debian@...ow.org>
Cc: Damon Ding <damon.ding@...k-chips.com>,
 Heiko Stuebner <heiko@...ech.de>,
 Rob Herring <robh@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Algea Cao <algea.cao@...k-chips.com>,
 Robert Foss <rfoss@...nel.org>,
 devicetree@...r.kernel.org,
 linux-phy@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org,
 linux-kernel@...r.kernel.org,
 sebastian.reichel@...labora.com,
 dri-devel@...ts.freedesktop.org,
 hjc@...k-chips.com,
 kever.yang@...k-chips.com,
 dmitry.baryshkov@...aro.org,
 vkoul@...nel.org,
 andy.yan@...k-chips.com,
 krzk+dt@...nel.org,
 linux-arm-kernel@...ts.infradead.org,
 l.stach@...gutronix.de
Subject: Re: [PATCH v6 00/14] Add eDP support for RK3588



> Wiadomość napisana przez Diederik de Haas <didi.debian@...ow.org> w dniu 13 lut 2025, o godz. 17:56:
> 
> On Thu Feb 13, 2025 at 3:54 PM CET, Piotr Oniszczuk wrote:
>> 
>> 
> 
> I don't know if it's relevant, but while HDMI0 got enabled for quite a
> few devices in 6.13, it did NOT get enabled for Rock 5 ITX.
> I made a local patch (which does the same thing as was done for Rock 5B)
> but I have no idea if it actually works (I don't have the board).
> 
> Maybe you need that for eDP to work?
> 
> Cheers,
>  Diederik
> <0001-arm64-dts-rockchip-Enable-HDMI0-on-ROCK-5-ITX.patch>

Diederik,
Thx for looking on this.

Im afraid patch will not make hdmi0 working as rock5 itx board has hdmi0 designed to use 3588 eDP1 + eDP->HDMI converter (in-house developed rk620 chip).

I suspect we need: 
-enable eDP1 support (hope Damon code can do this easily)
-map eDP to port0 in vop2 (port1 should be mapped to eDP/HDMI tx1)
-set typeC1/eDP1 mux to eDP1
Then maybe we should have hdmi0 working?

Im curious a bit about vop port mappings: maybe we can go with generic approach like:

eDP/HDMI tx0 -> port0   
eDP/HDMI tx1 -> port1   
typeC0/eDP0 -> port2 (+ exception for for rock5 itx: typeC1/eDP1 -> port2)