linux-kernel - Re: [PATCH v3 1/2] dt-bindings: it6505: add properties to restrict output bandwidth

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Date:   Thu, 6 Oct 2022 07:54:06 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     allen <allen.chen@....com.tw>
Cc:     Jau-Chih Tseng <Jau-Chih.Tseng@....com.tw>,
        Kenneth Hung <Kenneth.Hung@....com.tw>,
        Hermes Wu <Hermes.Wu@....com.tw>,
        Pin-yen Lin <treapking@...omium.org>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        "open list:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 1/2] dt-bindings: it6505: add properties to restrict
 output bandwidth

On Wed, Oct 5, 2022 at 9:05 PM allen <allen.chen@....com.tw> wrote:
>
> From: allen chen <allen.chen@....com.tw>
>
> Add properties to restrict dp output data-lanes and clock.
>
> Signed-off-by: Pin-Yen Lin <treapking@...omium.org>
> Signed-off-by: Allen Chen <allen.chen@....com.tw>
> ---
>  .../bindings/display/bridge/ite,it6505.yaml          | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> index 833d11b2303a..f5482a614d05 100644
> --- a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
> @@ -52,6 +52,16 @@ properties:
>      maxItems: 1
>      description: extcon specifier for the Power Delivery
>
> +  ite,dp-output-data-lane-count:
> +    description: restrict the dp output data-lanes with value of 1-4
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    enum: [ 1, 2, 4 ]

We have a standard property for lanes: data-lanes

It goes in the endpoint.

> +
> +  ite,dp-output-max-pixel-clock-mhz:
> +    description: restrict max pixel clock
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    default: 150

Also have a common property for this: 'link-frequencies'