linux-kernel - Re: [PATCH v3 1/9] media: dt-bindings: Add bindings for JH7110 Camera Subsystem

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Message-ID: <b8d25a66-6464-78fe-b39b-ebb8a7f1a99c@starfivetech.com>
Date:   Mon, 3 Apr 2023 17:14:25 +0800
From:   Jack Zhu <jack.zhu@...rfivetech.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        "Mauro Carvalho Chehab" <mchehab@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        "Todor Tomov" <todor.too@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        "Laurent Pinchart" <laurent.pinchart@...asonboard.com>,
        Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Eugen Hristev <eugen.hristev@...labora.com>
CC:     <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <changhuang.liang@...rfivetech.com>
Subject: Re: [PATCH v3 1/9] media: dt-bindings: Add bindings for JH7110 Camera
 Subsystem



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@...rfivetech.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@...rfivetech.com>
>> +  - Changhuang Liang <changhuang.liang@...rfivetech.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?

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?

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