linux-kernel - Re: [PATCH 1/2] media: dt-bindings: Add ST VD55G1 camera sensor binding

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Message-ID: <e00973c9-3817-415f-a724-faed0728cf5d@foss.st.com>
Date: Mon, 31 Mar 2025 14:34:05 +0200
From: Benjamin Mugnier <benjamin.mugnier@...s.st.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
        Sylvain Petinot
	<sylvain.petinot@...s.st.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Sakari Ailus
	<sakari.ailus@...ux.intel.com>
CC: <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] media: dt-bindings: Add ST VD55G1 camera sensor
 binding

Hi Krzysztof,

Thank you for your review. Consider everything done for V2.

On 3/29/25 06:42, Krzysztof Kozlowski wrote:
> On 28/03/2025 14:40, Benjamin Mugnier wrote:
>> +
>> +allOf:
>> +  - $ref: /schemas/media/video-interface-devices.yaml#
>> +
>> +properties:
>> +  compatible:
>> +    const: st,st-vd55g1
> 
> Drop st. See your filename how this should be called. Anyway, filename
> must match the compatible.
> 
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    maxItems: 1
>> +
>> +  vcore-supply:
>> +    description: Digital core power supply (1.15V)
>> +
>> +  vddio-supply:
>> +    description: Digital IO power supply (1.8V)
>> +
>> +  vana-supply:
>> +    description: Analog power supply (2.8V)
>> +
>> +  reset-gpios:
>> +    description: Sensor reset active low GPIO (XSHUTDOWN)
>> +    maxItems: 1
>> +
>> +  st,leds:
>> +    description:
>> +      List sensor's GPIOs used to control strobe light sources during exposure
>> +      time. The numbers identify the sensor pin on which the illumination
>> +      system is connected. GPIOs are active-high.
>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
>> +    minItems: 1
>> +    maxItems: 4
>> +    items:
>> +      minimum: 0
>> +      maximum: 3
>> +
>> +  port:
>> +    $ref: /schemas/graph.yaml#/$defs/port-base
>> +    additionalProperties: false
>> +
>> +    properties:
>> +      endpoint:
>> +        $ref: /schemas/media/video-interfaces.yaml#
>> +        unevaluatedProperties: false
>> +
>> +        properties:
>> +          data-lanes:
>> +            description:
>> +              VD55G1 only has one data lane, and must be 1.
>> +            maxItems: 1
>> +            items:
>> +              const: 1
> 
> Instead of five lines, just two:
> 
> items:
>   - const: 1
> 
> Don't repeat constraints in free form text.
> 
> 
>> +
>> +          link-frequencies:
>> +            maxItems: 1
>> +            items:
>> +              minimum: 125000000
>> +              maximum: 600000000
>> +
>> +          lane-polarities:
>> +            minItems: 1
>> +            maxItems: 2
>> +
>> +        required:
>> +          - data-lanes
>> +          - link-frequencies
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - vcore-supply
>> +  - vddio-supply
>> +  - vana-supply
>> +  - reset-gpios
>> +  - port
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/gpio/gpio.h>
>> +
>> +    i2c {
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +
>> +        camera-sensor@10 {
>> +            compatible = "st,vd55g1";
> 
> And here another compatible...
> 
>> +            reg = <0x10>;
>> +
>> +            clocks = <&camera_clk_12M>;
>> +
>> +            vcore-supply = <&camera_vcore_v1v15>;
>> +            vddio-supply = <&camera_vddio_v1v8>;
>> +            vana-supply = <&camera_vana_v2v8>;
>> +
>> +            reset-gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
>> +            st,leds = <2>;
>> +
>> +            orientation = <2>;
>> +            rotation = <0>;
>> +
>> +            port {
>> +                endpoint {
>> +                    data-lanes = <1>;
>> +                    link-frequencies = /bits/ 64 <600000000>;
>> +                    remote-endpoint = <&csiphy0_ep>;
>> +                };
>> +            };
>> +        };
>> +    };
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 2286200b355bde3604607be916ef09aa88feed0e..857af27ef392b6e6865d9a545061d1b012cce07e 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -22410,6 +22410,14 @@ S:	Maintained
>>  F:	Documentation/hwmon/stpddc60.rst
>>  F:	drivers/hwmon/pmbus/stpddc60.c
>>  
>> +ST VD55G1 DRIVER
>> +M:	Benjamin Mugnier <benjamin.mugnier@...s.st.com>
>> +M:	Sylvain Petinot <sylvain.petinot@...s.st.com>
>> +L:	linux-media@...r.kernel.org
>> +S:	Maintained
>> +T:	git git://linuxtv.org/media.git
> 
> Drop, unless you push patches there. Otherwise what is the point of
> duplicating subsystem data?
> 
>> +F:	Documentation/devicetree/bindings/media/i2c/st,vd55g1.yaml
>> +
>>  ST VGXY61 DRIVER
>>  M:	Benjamin Mugnier <benjamin.mugnier@...s.st.com>
>>  M:	Sylvain Petinot <sylvain.petinot@...s.st.com>
>>
> 
> 
> Best regards,
> Krzysztof

-- 
Regards,
Benjamin