linux-kernel - Re: [PATCH] dt-bindings: mxsfb: Exclude i.MX8MQ from power-domains requirement

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Message-ID: <ZMonFSqutQRqs61n@qwark.sigxcpu.org>
Date:   Wed, 2 Aug 2023 11:51:17 +0200
From:   Guido Günther <guido.gunther@...i.sm>
To:     David Heidelberg <david@...t.cz>
Cc:     Marek Vasut <marex@...x.de>, Stefan Agner <stefan@...er.ch>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Liu Ying <victor.liu@....com>, kernel@...i.sm,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh@...nel.org>, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: mxsfb: Exclude i.MX8MQ from power-domains
 requirement

Hi,
On Sun, Jul 30, 2023 at 09:41:20PM +0300, David Heidelberg wrote:
> i.MX8MQ uses as secondary compatible fsl,imx6sx-lcdif, which triggers
> requirement of power-domains, thou it's not required.
> 
> Fixes: f62678a77d58 ("dt-bindings: mxsfb: Document i.MX8M/i.MX6SX/i.MX6SL power-domains property")
> 
> Signed-off-by: David Heidelberg <david@...t.cz>
> ---
>  .../devicetree/bindings/display/fsl,lcdif.yaml        | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> index fc11ab5fc465..2d868276b0f9 100644
> --- a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> +++ b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> @@ -129,8 +129,15 @@ allOf:
>                - fsl,imx8mp-lcdif
>                - fsl,imx93-lcdif
>      then:
> -      required:
> -        - power-domains
> +      if:
> +        properties:
> +          compatible:
> +            not:
> +              contains:
> +                const: fsl,imx8mq-lcdif
> +      then:
> +        required:
> +          - power-domains

We currently enable the mipi power domain for the mipi dphy and nwl
bridge only but not for LCDIF itself assuming it's not needed (as there's
other outputs LCDIF can drive). I *think* this is correct but maybe
Marek or Liu can confirm?

Cheers,
 -- Guido

>  
>  examples:
>    - |
> -- 
> 2.40.1
>