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Date:   Mon, 3 Apr 2023 16:48:37 -0500
From:   Rob Herring <robh@kernel.org>
To:     Jack Zhu <jack.zhu@starfivetech.com>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Maxime Ripard <mripard@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Robert Foss <rfoss@kernel.org>,
        Todor Tomov <todor.too@gmail.com>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        Eugen Hristev <eugen.hristev@collabora.com>,
        linux-media@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, changhuang.liang@starfivetech.com
Subject: Re: [PATCH v3 1/9] media: dt-bindings: Add bindings for JH7110
 Camera Subsystem
Message-ID: <20230403214837.GA1925690-robh@kernel.org>
References: <20230331121826.96973-1-jack.zhu@starfivetech.com>
 <20230331121826.96973-2-jack.zhu@starfivetech.com>
 <91874e63-553f-ced5-ce32-309ac2ebf6e5@linaro.org>
 <b8d25a66-6464-78fe-b39b-ebb8a7f1a99c@starfivetech.com>
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On Mon, Apr 03, 2023 at 05:14:25PM +0800, Jack Zhu wrote:
> 
> 
> On 2023/4/1 4:09, Krzysztof Kozlowski wrote:
> > On 31/03/2023 14:18, Jack Zhu wrote:
> >> Add the bindings documentation for Starfive JH7110 Camera Subsystem
> >> which is used for handing image sensor data.
> >> 
> >> Signed-off-by: Jack Zhu <jack.zhu@starfivetech.com>
> >> ---
> >>  .../bindings/media/starfive,jh7110-camss.yaml | 159 ++++++++++++++++++
> >>  MAINTAINERS                                   |   7 +
> >>  2 files changed, 166 insertions(+)
> >>  create mode 100644 Documentation/devicetree/bindings/media/starfive,jh7110-camss.yaml
> >> 
> >> diff --git a/Documentation/devicetree/bindings/media/starfive,jh7110-camss.yaml b/Documentation/devicetree/bindings/media/starfive,jh7110-camss.yaml
> >> new file mode 100644
> >> index 000000000000..0235c70e7793
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/media/starfive,jh7110-camss.yaml
> >> @@ -0,0 +1,159 @@
> >> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> >> +
> >> +%YAML 1.2
> >> +---
> >> +$id: http://devicetree.org/schemas/media/starfive,jh7110-camss.yaml#
> >> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> >> +
> >> +title: Starfive SoC CAMSS ISP
> >> +
> >> +maintainers:
> >> +  - Jack Zhu <jack.zhu@starfivetech.com>
> >> +  - Changhuang Liang <changhuang.liang@starfivetech.com>
> >> +
> >> +description:
> >> +  The Starfive CAMSS ISP is a Camera interface for Starfive JH7110 SoC. It
> >> +  consists of a VIN controller (Video In Controller, a top-level control until)
> >> +  and an ISP.
> >> +
> >> +properties:
> >> +  compatible:
> >> +    const: starfive,jh7110-camss
> >> +
> >> +  reg:
> >> +    maxItems: 2
> >> +
> >> +  reg-names:
> >> +    items:
> >> +      - const: syscon
> >> +      - const: isp
> >> +
> >> +  clocks:
> >> +    maxItems: 7
> >> +
> >> +  clock-names:
> >> +    items:
> >> +      - const: apb_func
> >> +      - const: wrapper_clk_c
> >> +      - const: dvp_inv
> >> +      - const: axiwr
> >> +      - const: mipi_rx0_pxl
> >> +      - const: ispcore_2x
> >> +      - const: isp_axi
> >> +
> >> +  resets:
> >> +    maxItems: 6
> >> +
> >> +  reset-names:
> >> +    items:
> >> +      - const: wrapper_p
> >> +      - const: wrapper_c
> >> +      - const: axird
> >> +      - const: axiwr
> >> +      - const: isp_top_n
> >> +      - const: isp_top_axi
> >> +
> >> +  power-domains:
> >> +    items:
> >> +      - description: JH7110 ISP Power Domain Switch Controller.
> >> +
> >> +  interrupts:
> >> +    maxItems: 4
> >> +
> >> +  ports:
> >> +    $ref: /schemas/graph.yaml#/properties/ports
> >> +
> >> +    properties:
> >> +      port@0:
> >> +        $ref: /schemas/graph.yaml#/properties/port
> >> +        unevaluatedProperties: false
> >> +        description:
> >> +          Input port for receiving DVP data.
> >> +
> >> +        properties:
> >> +          endpoint:
> >> +            $ref: video-interfaces.yaml#
> > 
> > I don't think we use video-interfaces with port. Are you sure this works
> > fine? Please extend the example with appropriate properties to check...
> > 
> Thank you for your review.
> the following change, is it OK?

What Krzysztof meant is port@0 needs to $ref '$defs/port-base' rather 
then 'properties/port' to work with video-interfaces.yaml. If you made 
that change, then this is fine.

> 
> endpoint:
>             $ref: video-interfaces.yaml#
>             unevaluatedProperties: false
>             
>             properties:
>               bus-width:
>                 const: 8
> 
>               data-shift:
>                 const: 2
> 
> in example:
> 	port@0 {
>                 reg = <0>;
>                 vin_from_sc2235: endpoint {
>                     remote-endpoint = <&sc2235_to_vin>;
>                     bus-width = <8>;
>                     data-shift = <2>;
>                     hsync-active = <1>;
>                     vsync-active = <0>;
>                     pclk-sample = <1>;
>                 };
> 	};
> 
> 
> >> +            unevaluatedProperties: false
> >> +
> >> +      port@1:
> >> +        $ref: /schemas/graph.yaml#/properties/port
> >> +        unevaluatedProperties: false
> >> +        description:
> >> +          Input port for receiving CSI data.
> >> +
> >> +        properties:
> >> +          endpoint:
> >> +            $ref: video-interfaces.yaml#
> >> +            unevaluatedProperties: false
> > 
> > Same concerns here.
> > 
> for port@1, We don't use any properties as the allwinner,sun6i-a31-isp.yaml file.
> Use the following modification, I don't know if it is ok?

Yes.
 
> port@1:
>         $ref: /schemas/graph.yaml#/properties/port
>         description: Input port for receiving CSI data.

Rob