linux-kernel - Re: [PATCH 1/3] dt-bindings: display: synopsys,dw-hdmi: Add property for disabling CEC

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Date:   Tue, 18 Apr 2023 16:41:15 -0500
From:   Rob Herring <robh@...nel.org>
To:     Jernej Skrabec <jernej.skrabec@...il.com>
Cc:     andrzej.hajda@...el.com, neil.armstrong@...aro.org,
        rfoss@...nel.org, krzysztof.kozlowski+dt@...aro.org, wens@...e.org,
        samuel@...lland.org, Laurent.pinchart@...asonboard.com,
        jonas@...boo.se, airlied@...il.com, daniel@...ll.ch,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-media@...r.kernel.org,
        hverkuil-cisco@...all.nl
Subject: Re: [PATCH 1/3] dt-bindings: display: synopsys,dw-hdmi: Add property
 for disabling CEC

On Sat, Apr 15, 2023 at 12:46:11PM +0200, Jernej Skrabec wrote:
> Even though some DW-HDMI controllers have perfectly usable HDMI-CEC
> implementation, some boards might prefer not to use it or even use
> software implementation instead.
> 
> Add property for disabling CEC so driver doesn't expose unused CEC
> interface, if CEC pin isn't connected anywhere.

Isn't this all true for any bridge supporting CEC? Make this common.

> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@...il.com>
> ---
>  .../devicetree/bindings/display/bridge/synopsys,dw-hdmi.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/synopsys,dw-hdmi.yaml b/Documentation/devicetree/bindings/display/bridge/synopsys,dw-hdmi.yaml
> index 4b7e54a8f037..624d32c024f6 100644
> --- a/Documentation/devicetree/bindings/display/bridge/synopsys,dw-hdmi.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/synopsys,dw-hdmi.yaml
> @@ -48,6 +48,11 @@ properties:
>    interrupts:
>      maxItems: 1
>  
> +  snps,disable-cec:
> +    $ref: /schemas/types.yaml#/definitions/flag
> +    description:
> +      Disable HDMI-CEC.
> +
>  additionalProperties: true
>  
>  ...
> -- 
> 2.40.0
>