linux-kernel - Re: [PATCH v12 1/8] dt-bindings: media: platform: visconti: Add Toshiba Visconti MIPI CSI-2 Receiver

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Message-ID: <07e0cc97-c0c4-42fd-b51d-87b0eaed4e4a@kernel.org>
Date: Mon, 25 Nov 2024 11:11:17 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Yuji Ishikawa <yuji2.ishikawa@...hiba.co.jp>,
 Laurent Pinchart <laurent.pinchart@...asonboard.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>,
 Hans Verkuil <hverkuil-cisco@...all.nl>,
 Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v12 1/8] dt-bindings: media: platform: visconti: Add
 Toshiba Visconti MIPI CSI-2 Receiver

On 25/11/2024 10:21, Yuji Ishikawa wrote:
> Adds the Device Tree binding documentation that allows to describe
> the MIPI CSI-2 Receiver found in Toshiba Visconti SoCs.
> 
> Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@...hiba.co.jp>
> Reviewed-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>


How newly added patch can have already Rb tag? Was this review really,
really performed internally or you just satisfy some internal managers
requirements and fake the stats?

> ---
> 
> Changelog v12:
> - Newly add bindings for CSI2RX driver 
> 
>  .../media/toshiba,visconti5-csi2rx.yaml       | 104 ++++++++++++++++++
>  1 file changed, 104 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/toshiba,visconti5-csi2rx.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/toshiba,visconti5-csi2rx.yaml b/Documentation/devicetree/bindings/media/toshiba,visconti5-csi2rx.yaml
> new file mode 100644
> index 000000000000..5488072bc82a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/toshiba,visconti5-csi2rx.yaml
> @@ -0,0 +1,104 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/toshiba,visconti5-csi2rx.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Toshiba Visconti5 SoC MIPI CSI-2 receiver
> +
> +maintainers:
> +  - Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>
> +
> +description: |-

Drop |-

> +  Toshiba Visconti5 SoC MIPI CSI-2 receiver device receives MIPI CSI-2 video
> +  stream. Use with VIIF device. T.B.D
> +
> +properties:
> +  compatible:
> +    const: toshiba,visconti5-csi2rx

Why this is called "RX"? Can you have a TX? I had impression that one
cannot.

> +
> +  reg:
> +    items:
> +      - description: Registers for CSI2 receiver control
> +
> +  interrupts:
> +    items:
> +      - description: CSI2 Receiver Interrupt
> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description:
> +          Input port node, single endpoint describing the CSI-2 transmitter.
> +
> +        properties:
> +          endpoint:
> +            $ref: video-interfaces.yaml#
> +            unevaluatedProperties: false
> +
> +            properties:
> +              data-lanes:
> +                description: CSI2 receiver supports 1, 2, 3 or 4 data lanes
> +                minItems: 1
> +                items:
> +                  - const: 1
> +                  - const: 2
> +                  - const: 3
> +                  - const: 4
> +            required:
> +              - data-lanes
> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description:
> +          Output port node, single endpoint describing the Visconti VIIF.
> +
> +    required:
> +      - port@0
> +      - port@1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - ports
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        csi2rx@...08000 {


csi@

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



Best regards,
Krzysztof