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

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Message-Id: <20260128-rubikpi-next-20260116-v2-1-ba51ce8d2bd2@thundersoft.com>
Date: Wed, 28 Jan 2026 19:15:45 +0800
From: Hongyang Zhao <hongyang.zhao@...ndersoft.com>
To: Andrzej Hajda <andrzej.hajda@...el.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>, 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, 
 Hongyang Zhao <hongyang.zhao@...ndersoft.com>, 
 Roger Shimizu <rosh@...ian.org>
Subject: [PATCH v2 1/3] dt-bindings: display: lt9611: Support single Port B
 input

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:

-- 
2.43.0