linux-kernel - Re: [PATCH v3 1/6] dt-bindings: lcdif: Add i.MX93 LCDIF support

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Date:   Wed, 15 Feb 2023 08:26:16 +0100
From:   Alexander Stein <alexander.stein@...tq-group.com>
To:     dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Liu Ying <victor.liu@....com>
Cc:     marex@...x.de, stefan@...er.ch, airlied@...il.com, daniel@...ll.ch,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com,
        krzysztof.kozlowski@...aro.org, LW@...o-electronics.de
Subject: Re: [PATCH v3 1/6] dt-bindings: lcdif: Add i.MX93 LCDIF support

Hi Liu,

thanks for the update.

Am Montag, 13. Februar 2023, 09:56:07 CET schrieb Liu Ying:
> There is one LCDIF embedded in i.MX93 SoC to connect with
> MIPI DSI controller through LCDIF cross line pattern(controlled
> by mediamix blk-ctrl) or connect with LVDS display bridge(LDB)
> directly or connect with a parallel display through parallel
> display format(also controlled by mediamix blk-ctrl).  i.MX93
> LCDIF IP is essentially the same to i.MX8MP LCDIF IP.  Add device
> tree binding for i.MX93 LCDIF.
> 
> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Reviewed-by: Marek Vasut <marex@...x.de>
> Signed-off-by: Liu Ying <victor.liu@....com>
> ---
> v2->v3:
> * No change.
> 
> v1->v2:
> * Add Krzysztof's A-b and Marek's R-b tags on patch 1/6.
> 
>  Documentation/devicetree/bindings/display/fsl,lcdif.yaml | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml index
> 75b4efd70ba8..fc11ab5fc465 100644
> --- a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> +++ b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> @@ -21,6 +21,7 @@ properties:
>            - fsl,imx28-lcdif
>            - fsl,imx6sx-lcdif
>            - fsl,imx8mp-lcdif
> +          - fsl,imx93-lcdif
>        - items:
>            - enum:
>                - fsl,imx6sl-lcdif
> @@ -88,7 +89,9 @@ allOf:
>        properties:
>          compatible:
>            contains:
> -            const: fsl,imx8mp-lcdif
> +            enum:
> +              - fsl,imx8mp-lcdif
> +              - fsl,imx93-lcdif
>      then:
>        properties:
>          clocks:
> @@ -107,6 +110,7 @@ allOf:
>                enum:
>                  - fsl,imx6sx-lcdif
>                  - fsl,imx8mp-lcdif
> +                - fsl,imx93-lcdif
>      then:
>        properties:
>          clocks:
> @@ -123,6 +127,7 @@ allOf:
>                - fsl,imx8mm-lcdif
>                - fsl,imx8mn-lcdif
>                - fsl,imx8mp-lcdif
> +              - fsl,imx93-lcdif
>      then:
>        required:
>          - power-domains

I would have expected that fsl,imx93-lcdif supports up to 3 endpoints (MIPI 
DSI, LVDS, and parallel) in a 'ports' subnode. But this binding only supports 
a single 'port' sub-node. Also an example for this case might be very helpful.

Best regards,
Alexander
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