linux-kernel - Re: [PATCH v7 1/5] dt-bindings: media: platform: visconti: Add Toshiba Visconti Video Input Interface

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <7aa255e8-1cf1-03c6-02c8-de7c737a5683@linaro.org>
Date:   Fri, 14 Jul 2023 09:50:02 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Yuji Ishikawa <yuji2.ishikawa@...hiba.co.jp>,
        Hans Verkuil <hverkuil@...all.nl>,
        Sakari Ailus <sakari.ailus@....fi>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>,
        Mark Brown <broonie@...nel.org>
Cc:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 1/5] dt-bindings: media: platform: visconti: Add
 Toshiba Visconti Video Input Interface

On 14/07/2023 03:50, Yuji Ishikawa wrote:
> Adds the Device Tree binding documentation that allows to describe
> the Video Input Interface found in Toshiba Visconti SoCs.
> 
> Signed-off-by: Yuji Ishikawa <yuji2.ishikawa@...hiba.co.jp>
> Reviewed-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>
> ---
> Changelog v2:

Thank you for your patch. There is something to discuss/improve.

> - no change
> 
> Changelog v3:
> - no change
> 
> Changelog v4:
> - fix style problems at the v3 patch
> - remove "index" member
> - update example
> 
> Changelog v5:
> - no change
> 
> Changelog v6:
> - add register definition of BUS-IF and MPU
> 
> Changelog v7:
> - remove trailing "bindings" from commit header message
> - remove trailing "Device Tree Bindings" from title
> - fix text wrapping of description
> - change compatible to visconti5-viif

Then the filename should be updated to match it:
toshiba,visconti5-viif.yaml


> - explicitly define allowed properties for port::endpoint
> 
>  .../bindings/media/toshiba,visconti-viif.yaml | 108 ++++++++++++++++++
>  1 file changed, 108 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/toshiba,visconti-viif.yaml
> 

...

> +  port:
> +    $ref: /schemas/graph.yaml#/$defs/port-base
> +    unevaluatedProperties: false
> +    description: Input port, single endpoint describing the CSI-2 transmitter.
> +
> +    properties:
> +      endpoint:
> +        $ref: video-interfaces.yaml#
> +        additionalProperties: false

This should be rather:
unevaluatedProperties: false
> +
> +        required: ["bus-type", "clock-noncontinuous", "link-frequencies", "remote-endpoint"]

That's not the syntax we try to keep in the bindings. See
renesas,rzg2l-csi2.yaml.

> +
> +        properties:
> +          data-lanes:
> +            description: VIIF supports 2 or 4 data lanes
> +            $ref: /schemas/types.yaml#/definitions/uint32-array
> +            minItems: 1
> +            maxItems: 4
> +            items:
> +              minimum: 1
> +              maximum: 4
> +
> +          clock-lanes:
> +            description: VIIF supports 1 clock lane
> +            const: 0

Are you sure it must be on position 0?

> +
> +          bus-type: true
> +          clock-noncontinuous: true
> +          link-frequencies: true
> +          remote-endpoint: true

Drop all of these "xxx: true", should not be needed after converting to
unevaluatedProperties: false

> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - port
> +
> +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>;
> +
> +        viif@...00000 {

isp@
(or video or something else matching this type of the device, but this
should be a generic name)

> +            compatible = "toshiba,visconti5-viif";
> +            reg = <0 0x1c000000 0 0x6000>,
> +                  <0 0x1c008000 0 0x400>,
> +                  <0 0x1c00E000 0 0x1000>,
> +                  <0 0x2417A000 0 0x1000>;

Lowercase hex, please.

Best regards,
Krzysztof