linux-kernel - Re: [PATCH v2 01/21] dt-bindings: display: tegra: add Tegra20 VIP

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Date:   Thu, 1 Dec 2022 17:19:36 -0600
From:   Rob Herring <robh@...nel.org>
To:     Luca Ceresoli <luca.ceresoli@...tlin.com>
Cc:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        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>,
        Dmitry Osipenko <digetx@...il.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        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>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Richard Leitner <richard.leitner@...data.com>
Subject: Re: [PATCH v2 01/21] dt-bindings: display: tegra: add Tegra20 VIP

On Mon, Nov 28, 2022 at 04:23:16PM +0100, Luca Ceresoli wrote:
> VIP is the parallel video capture component within the video input
> subsystem of Tegra20 (and other Tegra chips, apparently).
> 
> Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
> 
> ---
> 
> Changed in v2 (suggested by Krzysztof Kozlowski):
> - remove redundant "bindings" from subject line
> - remove $nodename
> - add channel@0 description
> - add reg: const: 0
> ---
>  .../display/tegra/nvidia,tegra20-vip.yaml     | 63 +++++++++++++++++++
>  MAINTAINERS                                   |  7 +++
>  2 files changed, 70 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-vip.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-vip.yaml b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-vip.yaml
> new file mode 100644
> index 000000000000..44be2e16c9b4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-vip.yaml
> @@ -0,0 +1,63 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$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:
> +  compatible:
> +    enum:
> +      - nvidia,tegra20-vip
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0
> +
> +  channel@0:

Kind of odd there is only 1 channel with a unit-address. Are more 
channels coming? Please make the binding as complete as possible even if 
no driver support yet.


> +    description: parallel video capture interface for the VI
> +    type: object
> +
> +    properties:
> +      reg:
> +        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

A bit easier to read the indented cases if this is above 'properties'.

> +
> +    required:
> +      - reg
> +      - ports
> +
> +unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +  - "#address-cells"
> +  - "#size-cells"
> +  - channel@0
> +
> +# see nvidia,tegra20-vi.yaml for an example
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 69565ac0c224..92c762f85f17 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -20315,6 +20315,13 @@ S:	Maintained
>  F:	Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.yaml
>  F:	drivers/staging/media/tegra-video/
>  
> +TEGRA VIDEO DRIVER FOR TEGRA20 VIP (PARALLEL VIDEO CAPTURE)
> +M:	Luca Ceresoli <luca.ceresoli@...tlin.com>
> +L:	linux-media@...r.kernel.org
> +L:	linux-tegra@...r.kernel.org
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-vip.yaml
> +
>  TEGRA XUSB PADCTL DRIVER
>  M:	JC Kuo <jckuo@...dia.com>
>  S:	Supported
> -- 
> 2.34.1
> 
>