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Date: Fri, 12 Jan 2024 08:32:27 +0100
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Subject: Re: [PATCH v4 1/5] dt-bindings: media: add mediatek ISP3.0 sensor
 interface
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To: Julien Stephan <jstephan@baylibre.com>
Cc: Louis Kuo <louis.kuo@mediatek.com>, Phi-Bang Nguyen
 <pnguyen@baylibre.com>, Laurent Pinchart
 <laurent.pinchart@ideasonboard.com>, Andy Hsieh <andy.hsieh@mediatek.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>,
 Conor Dooley <conor+dt@kernel.org>, devicetree@vger.kernel.org,
 Florian Sylvestre <fsylvestre@baylibre.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
 linux-mediatek@lists.infradead.org, linux-media@vger.kernel.org,
 Matthias Brugger <matthias.bgg@gmail.com>,
 Mauro Carvalho Chehab <mchehab@kernel.org>,
 Paul Elder <paul.elder@ideasonboard.com>, Rob Herring <robh+dt@kernel.org>
References: <20240110141443.364655-1-jstephan@baylibre.com>
 <20240110141443.364655-2-jstephan@baylibre.com>
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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In-Reply-To: <20240110141443.364655-2-jstephan@baylibre.com>
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On 10/01/2024 15:14, Julien Stephan wrote:
> From: Louis Kuo <louis.kuo@mediatek.com>
> 
> This adds the bindings, for the mediatek ISP3.0 SENINF module embedded in
> some Mediatek SoC, such as the mt8365
> 

..

> +  clock-names:
> +    items:
> +      - const: camsys
> +      - const: top_mux
> +
> +  phys:
> +    minItems: 1
> +    maxItems: 4
> +    description:
> +      phandle to the PHYs connected to CSI0/A, CSI1, CSI2 and CSI0B
> +
> +  phy-names:
> +    minItems: 1
> +    items:
> +      - const: csi0
> +      - const: csi1
> +      - const: csi2
> +      - const: csi0b

Why one hardware has flexible number of phys?

> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description: CSI0 or CSI0A port
> +
> +        properties:
> +          endpoint:
> +            $ref: video-interfaces.yaml#
> +            unevaluatedProperties: false
> +
> +            properties:
> +              clock-lanes:
> +                maxItems: 1
> +              data-lanes:
> +                minItems: 1
> +                maxItems: 4
> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description: CSI1 port
> +
> +        properties:
> +          endpoint:
> +            $ref: video-interfaces.yaml#
> +            unevaluatedProperties: false
> +
> +            properties:
> +              clock-lanes:
> +                maxItems: 1
> +              data-lanes:
> +                minItems: 1
> +                maxItems: 4
> +
> +      port@2:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description: CSI2 port
> +
> +        properties:
> +          endpoint:
> +            $ref: video-interfaces.yaml#
> +            unevaluatedProperties: false
> +
> +            properties:
> +              clock-lanes:
> +                maxItems: 1
> +              data-lanes:
> +                minItems: 1
> +                maxItems: 4
> +
> +      port@3:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description: CSI0B port
> +
> +        properties:
> +          endpoint:
> +            $ref: video-interfaces.yaml#
> +            unevaluatedProperties: false
> +
> +            properties:
> +              clock-lanes:
> +                maxItems: 1
> +              data-lanes:
> +                minItems: 1
> +                maxItems: 2
> +
> +      port@4:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: connection point for cam0
> +
> +      port@5:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: connection point for cam1
> +
> +      port@6:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: connection point for camsv0
> +
> +      port@7:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: connection point for camsv1
> +
> +      port@8:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: connection point for camsv2
> +
> +      port@9:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: connection point for camsv3
> +
> +    required:
> +      - port@0
> +      - port@1
> +      - port@2
> +      - port@3
> +      - port@4
> +      - port@5
> +      - port@6
> +      - port@7
> +      - port@8
> +      - port@9
> +
> +required:
> +  - compatible
> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - power-domains
> +  - ports
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/mediatek,mt8365-clk.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/phy/phy.h>
> +    #include <dt-bindings/power/mediatek,mt8365-power.h>
> +
> +    soc {
> +          #address-cells = <2>;
> +          #size-cells = <2>;

Use 4 spaces for example indentation.

> +
> +          seninf: seninf@15040000 {

Node names should be generic. See also an explanation and list of
examples (not exhaustive) in DT specification:
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation


> +                compatible = "mediatek,mt8365-seninf";
> +                reg = <0 0x15040000 0 0x6000>;
> +                interrupts = <GIC_SPI 210 IRQ_TYPE_LEVEL_LOW>;
> +                clocks = <&camsys CLK_CAM_SENIF>,
> +                         <&topckgen CLK_TOP_SENIF_SEL>;
> +                clock-names = "camsys", "top_mux";
> +
> +                power-domains = <&spm MT8365_POWER_DOMAIN_CAM>;
> +
> +                phys = <&mipi_csi0 PHY_TYPE_DPHY>;
> +                phy-names = "csi0";
> +
> +                ports {
> +                      #address-cells = <1>;
> +                      #size-cells = <0>;
> +
> +                      port@0 {
> +                            reg = <0>;
> +                            seninf_in1: endpoint {
> +                              clock-lanes = <2>;
> +                              data-lanes = <1 3 0 4>;
> +                              remote-endpoint = <&isp1_out>;
> +                            };
> +                      };
> +
> +                      port@1 {
> +                          reg = <1>;
> +                      };
> +
> +                      port@2 {
> +                            reg = <2>;
> +                      };
> +
> +                      port@3 {
> +                            reg = <3>;
> +                      };
> +
> +                      port@4 {
> +                            reg = <4>;
> +                            seninf_camsv1_endpoint: endpoint {
> +                                remote-endpoint = <&camsv1_endpoint>;
> +                            };
> +                      };
> +
> +                      port@5 {
> +                            reg = <5>;
> +                      };
> +
> +                      port@6 {
> +                            reg = <6>;
> +                      };
> +
> +                      port@7 {
> +                            reg = <7>;
> +                      };
> +
> +                      port@8 {
> +                            reg = <8>;
> +                      };
> +
> +                      port@9 {
> +                            reg = <9>;
> +                      };
> +

Stray blank line

> +                };


Best regards,
Krzysztof