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

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Message-Id: <D7RIYCL3ZCLT.2NAZXUAH4EQC9@cknow.org>
Date: Thu, 13 Feb 2025 19:20:49 +0100
From: "Diederik de Haas" <didi.debian@...ow.org>
To: "Sebastian Reichel" <sebastian.reichel@...labora.com>
Cc: "Piotr Oniszczuk" <piotr.oniszczuk@...il.com>, "Damon Ding"
 <damon.ding@...k-chips.com>, <heiko@...ech.de>, <robh@...nel.org>,
 <conor+dt@...nel.org>, <algea.cao@...k-chips.com>, <rfoss@...nel.org>,
 <devicetree@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
 <linux-rockchip@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
 <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

Hi,

On Thu Feb 13, 2025 at 6:33 PM CET, Sebastian Reichel wrote:
> On Thu, Feb 13, 2025 at 05:56:55PM +0100, Diederik de Haas wrote:
>> On Thu Feb 13, 2025 at 3:54 PM CET, Piotr Oniszczuk wrote:
>> > I’m playing with hdmi0 port enablement on radxa rock5 itx board with 6.14 mainline.
>> >
>> > rock5 itx has 2 hdmi ports: hdmi0 is wired to rk3588 typeC1/eDP1 eDP with ra620 eDP->HDMI converter and hdmi1 from hdmi/edp tx1
>> > (see page3 & page29 at https://dl.radxa.com/rock5/5itx/v1110/radxa_rock_5itx_v1110_schematic.pdf)
>> >
>> > I’m on 6.14-rc2 with applied: 
>> > [1] Cristicc hdmi code (https://gitlab.collabora.com/cristicc/linux-next/-/commits/rk3588-hdmi-bridge)
>> > [2] eDP support for RK3588 (https://patchwork.kernel.org/project/linux-rockchip/list/?series=927765)
>> > [3] Add eDP mode support for Rockchip Samsung HDPTX PHY (https://patchwork.kernel.org/project/linux-rockchip/cover/20250205105157.580060-1-damon.ding@rock-chips.com/)
>> >
>> 
>> 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).
>
> I don't have the board either, but the schematics suggests that your
> patch is not correct. On the Rock 5 ITX the RK3588's first HDMI/eDP
> port should be enabled in eDP mode to be used with an eDP panel via
> connector J11. This series is needed for that.

Ah, then there was more to it then simply being overlooked/forgotten.
Thanks for the clarification :-)

Cheers,
  Diederik

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