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

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Message-ID: <288857ab-bebd-4f80-9cdc-9b04fa6c7386@gmail.com>
Date:   Thu, 14 Dec 2023 16:22:50 +0100
From:   Alex Bee <knaerzche@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        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>
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 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.
>> Signed-off-by: Alex Bee <knaerzche@...il.com>
>> ---
>>   .../display/rockchip/rockchip,inno-hdmi.yaml  | 30 +++++++++++++++++--
>>   1 file changed, 28 insertions(+), 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml
>> index 96889c86849a..9f00abcbfb38 100644
>> --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml
>> +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,inno-hdmi.yaml
>> @@ -14,6 +14,7 @@ properties:
>>     compatible:
>>       enum:
>>         - rockchip,rk3036-inno-hdmi
>> +      - rockchip,rk3128-inno-hdmi
>>   
>>     reg:
>>       maxItems: 1
>> @@ -22,10 +23,21 @@ properties:
>>       maxItems: 1
>>   
>>     clocks:
>> -    maxItems: 1
>> +    minItems: 1
>> +    items:
>> +      - description: The HDMI controller main clock
>> +      - description: The HDMI PHY reference clock
>>   
>>     clock-names:
>> -    const: pclk
>> +    minItems: 1
>> +    items:
>> +      - const: pclk
>> +      - enum:
>> +          - pclk
>> +          - ref
> That's way overcomplicated. Just items listing the names and minItems:
> 1. See other bindings how this is done.
OK.
>> +
>> +  power-domains:
>> +    maxItems: 1
> Is it relevant to existing device?

Will move to new variant only.

Alex

>>   
>>     ports:
>>       $ref: /schemas/graph.yaml#/properties/ports
>> @@ -55,6 +67,20 @@ required:
>>     - pinctrl-names
>>     - ports
>
> Best regards,
> Krzysztof
>