linux-kernel - Re: [PATCH v2 1/3] dt-bindings: display: lt9611: Support single Port B input

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Message-ID: <9042eca8-8b44-4804-9013-c21f1fc0d2b7@linaro.org>
Date: Thu, 29 Jan 2026 09:35:47 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Hongyang Zhao <hongyang.zhao@...ndersoft.com>,
 Andrzej Hajda <andrzej.hajda@...el.com>, Robert Foss <rfoss@...nel.org>,
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 Roger Shimizu <rosh@...ian.org>
Subject: Re: [PATCH v2 1/3] dt-bindings: display: lt9611: Support single Port
 B input

On 1/28/26 12:15, Hongyang Zhao wrote:
> The LT9611 has two DSI input ports (Port A and Port B). Update the
> binding to clearly document the port mapping and allow using Port B
> alone when DSI is physically connected to Port B only.
> 
> Changes:
> - Clarify port@0 corresponds to DSI Port A input
> - Clarify port@1 corresponds to DSI Port B input
> - Change port requirement from mandatory port@0 to anyOf port@...ort@1,
>    allowing either port to be used independently
> 
> Signed-off-by: Hongyang Zhao <hongyang.zhao@...ndersoft.com>
> Reviewed-by: Roger Shimizu <rosh@...ian.org>
> ---
>   .../bindings/display/bridge/lontium,lt9611.yaml           | 15 +++++++++++----
>   1 file changed, 11 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml b/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml
> index 655db8cfdc25..429a06057ae8 100644
> --- a/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/lontium,lt9611.yaml
> @@ -44,21 +44,28 @@ properties:
>         port@0:
>           $ref: /schemas/graph.yaml#/properties/port
>           description:
> -          Primary MIPI port-1 for MIPI input
> +          DSI Port A input. directly drives the display, or works in
> +          combination with Port B for higher resolution displays.
>   
>         port@1:
>           $ref: /schemas/graph.yaml#/properties/port
>           description:
> -          Additional MIPI port-2 for MIPI input, used in combination
> -          with primary MIPI port-1 to drive higher resolution displays
> +          DSI Port B input. Can be used alone if DSI is physically
> +          connected to Port B, or in combination with Port A for higher
> +          resolution displays.
>   
>         port@2:
>           $ref: /schemas/graph.yaml#/properties/port
>           description:
>             HDMI port for HDMI output
>   
> +    anyOf:
> +      - required:
> +          - port@0
> +      - required:
> +          - port@1
> +
>       required:
> -      - port@0
>         - port@2
>   
>   required:
> 

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>

Thanks,
Neil