linux-kernel - Re: [PATCH 01/11] dt-bindings: display: rockchip,inno-hdmi: Document RK3128 compatible

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Message-ID: <2221612.3VsfAaAtOV@diego>
Date:   Thu, 14 Dec 2023 17:20:04 +0100
From:   Heiko Stübner <heiko@...ech.de>
To:     Alex Bee <knaerzche@...il.com>, Sandy Huang <hjc@...k-chips.com>,
        Andy Yan <andyshrk@....com>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/11] dt-bindings: display: rockchip,inno-hdmi: Document RK3128
 compatible

Am Donnerstag, 14. Dezember 2023, 17:07:27 CET schrieb Krzysztof Kozlowski:
> On 14/12/2023 16:22, Alex Bee wrote:
> > 
> > Am 14.12.23 um 08:53 schrieb Krzysztof Kozlowski:
> >> On 13/12/2023 20:51, Alex Bee wrote:
> >>> Document the compatible for RK3128's HDMI controller block.
> >>> The integration for this SoC is somewhat different here: It needs the PHY's
> >> Please wrap commit message according to Linux coding style / submission
> >> process (neither too early nor over the limit):
> >> https://elixir.bootlin.com/linux/v6.4-rc1/source/Documentation/process/submitting-patches.rst#L597
> > OK. Not sure why checkpatch --strict  didn't tell me that I'm over the 
> > limit here.
> >>
> >>> reference clock rate to calculate the ddc bus frequency correctly. This
> >>> clock is part of a power-domain (PD_VIO), so this gets added as an optional
> >>> property too.
> >> If clock is part of power domain, then the power domain must be in the
> >> clock controller, not here. So either you put power domain in wrong
> >> place or you used incorrect reason for a change.
> >   Rockchip defines it's powerdomains per clock and I was little to much 
> > in that world when writing this. Actually the controller itself is part 
> > of the powerdomain. Will rephrase.
> 
> Does it mean you have like 200 different power domains in one SoC? Then
> how are they different than clock if there is one-to-one mapping?

It's more like the other way around. Controllers and their clocks belong
to specific power-domains. So there are of course more clocks than domains.