linux-kernel - Re: [PATCH v2 0/4] Add support for HDMI1 output on RK3588 SoC

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Message-ID: <43ae0fc5-d775-49d7-80cd-af111ff8fb25@collabora.com>
Date: Wed, 11 Dec 2024 11:16:14 +0200
From: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To: Heiko Stübner <heiko@...ech.de>,
 Sandy Huang <hjc@...k-chips.com>, Andy Yan <andy.yan@...k-chips.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: Alexandre ARNOUD <aarnoud@...com>, kernel@...labora.com,
 dri-devel@...ts.freedesktop.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org
Subject: Re: [PATCH v2 0/4] Add support for HDMI1 output on RK3588 SoC

Hi Heiko,

On 12/11/24 10:46 AM, Heiko Stübner wrote:
> Hi Cristian,
> 
> Am Mittwoch, 11. Dezember 2024, 00:06:13 CET schrieb Cristian Ciocaltea:
>> The patches provide the basic support to handle the second HDMI output
>> port found on Rockchip RK3588 SoC.
>>
>> For now I enabled it on Radxa ROCK 5B only, the board I've been using to
>> validate this.
>>
>> ** IMPORTANT **
>>
>> The series has a runtime dependency on "phy: phy-rockchip-samsung-hdptx:
>> Don't use dt aliases to determine phy-id", a patch submitted recently by
>> Heiko [1].  Without applying it, the functionality on both HDMI TX ports
>> will break.
> 
> Looking at the drm/rockchip patch, that should not cause disruptions on
> its own, right?
> 
> Only with the dts-parts enabled would we run into phy-issue.
> (Asking, because things go through different trees and the drm
> part looks ready)

That's right, I should have better explained this - all patches except
the last one (that is actually enabling HDMI1 on a specific board) can
be safely applied.

Thanks,
Cristian