linux-kernel - Re: [PATCH 01/23] dt-bindings: display: tegra: add bindings for Tegra20 VIP

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Message-ID: <ca5f3b54-25bd-4dd5-799f-c7bda08cdef6@linaro.org>
Date:   Tue, 15 Nov 2022 13:12:44 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     luca.ceresoli@...tlin.com, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Sowjanya Komatineni <skomatineni@...dia.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Dmitry Osipenko <digetx@...il.com>
Cc:     linux-media@...r.kernel.org, linux-tegra@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Richard Leitner <richard.leitner@...data.com>
Subject: Re: [PATCH 01/23] dt-bindings: display: tegra: add bindings for
 Tegra20 VIP

On 09/11/2022 15:18, luca.ceresoli@...tlin.com wrote:
> From: Luca Ceresoli <luca.ceresoli@...tlin.com>
> 
> VIP is the parallel video capture component within the video input
> subsystem of Tegra20 (and other Tegra chips, apparently).

Subject: drop second, redundant "bindings".

> 
> Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
> ---
>  .../display/tegra/nvidia,tegra20-vip.yaml     | 64 +++++++++++++++++++
>  MAINTAINERS                                   |  7 ++
>  2 files changed, 71 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-vip.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-vip.yaml b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-vip.yaml
> new file mode 100644
> index 000000000000..934dabfd2307
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-vip.yaml
> @@ -0,0 +1,64 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/tegra/nvidia,tegra20-vip.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: NVIDIA Tegra VIP (parallel video capture) controller
> +
> +maintainers:
> +  - Luca Ceresoli <luca.ceresoli@...tlin.com>
> +
> +properties:
> +  $nodename:
> +    const: vip

No need to enforce names in device schemas, especially that this does
not look like a generic name.

> +
> +  compatible:
> +    enum:
> +      - nvidia,tegra20-vip
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0
> +
> +  channel@0:

Missing description.

> +    type: object

Do you expect it to grow to more channels?

> +
> +    properties:
> +      reg: true

const: 0

> +
> +      ports:
> +        $ref: /schemas/graph.yaml#/properties/ports
> +
> +        properties:
> +          port@0:
> +            $ref: /schemas/graph.yaml#/properties/port
> +            description:
> +              Port receiving the video stream from the sensor
> +
> +          port@1:
> +            $ref: /schemas/graph.yaml#/properties/port
> +            description:
> +              Port sending the video stream to the VI
> +
> +        required:
> +          - port@0
> +          - port@1
> +
> +    additionalProperties: false
> +
> +    required:
> +      - reg
> +      - ports
> +
> +unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +  - "#address-cells"
> +  - "#size-cells"
> +  - channel@0
> +
> +# see nvidia,tegra20-vi.yaml for an example

That file does not have this compatible. At least not on next-20221109.

Best regards,
Krzysztof