linux-kernel - [PATCH RESEND V2 1/1] dt-bindings: display: nwl-dsi: Allow 'data-lanes' property for port@1

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Message-Id: <20250407150442.2778299-1-Frank.Li@nxp.com>
Date: Mon,  7 Apr 2025 11:04:42 -0400
From: Frank Li <Frank.Li@....com>
To: krzk@...nel.org,
	robh@...nel.org
Cc: Frank.Li@....com,
	Laurent.pinchart@...asonboard.com,
	agx@...xcpu.org,
	airlied@...il.com,
	andrzej.hajda@...el.com,
	conor+dt@...nel.org,
	devicetree@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	imx@...ts.linux.dev,
	jernej.skrabec@...il.com,
	jonas@...boo.se,
	krzk+dt@...nel.org,
	linux-kernel@...r.kernel.org,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	neil.armstrong@...aro.org,
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	robert.chiras@....com,
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	tzimmermann@...e.de
Subject: [PATCH RESEND V2 1/1] dt-bindings: display: nwl-dsi: Allow 'data-lanes' property for port@1

This controller support scalable data lanes from 1 to 4. Add the
'data-lanes' property to configure the number of MIPI display panel lanes
selected for boards.

Change $ref of port@1 from 'port' to 'port-base' and add 'endpoint'
property referencing video-interfaces.yaml. Allow 'data-lanes' values
1, 2, 3, and 4 for port@1.

Fix below CHECK_DTB warnings:
arch/arm64/boot/dts/freescale/imx8mq-tqma8mq-mba8mx-lvds-tm070jvhg33.dtb:
 dsi@...00000: ports:port@1:endpoint: Unevaluated properties are not allowed ('data-lanes' was unexpected)

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Signed-off-by: Frank Li <Frank.Li@....com>
---
Missed v6.15 merge windows.

This one elimiate last two lines warning under arm64: dts/freescale
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Resend V2: include Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
tags.

Original v2 thread:
https://lore.kernel.org/imx/c5y6mocsd77wj5lah6n47vtteqc5ekcrbdod6z5vtcnxhleudw@kfhpyoiylqqp/

Change from v1 to v2
- Add the reason why need 'data-lanes' property in commit message.
---
 .../bindings/display/bridge/nwl-dsi.yaml       | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml b/Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml
index 350fb8f400f02..5952e6448ed47 100644
--- a/Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/nwl-dsi.yaml
@@ -111,11 +111,27 @@ properties:
         unevaluatedProperties: false
 
       port@1:
-        $ref: /schemas/graph.yaml#/properties/port
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
         description:
           DSI output port node to the panel or the next bridge
           in the chain
 
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              data-lanes:
+                description: array of physical DSI data lane indexes.
+                minItems: 1
+                items:
+                  - const: 1
+                  - const: 2
+                  - const: 3
+                  - const: 4
+
     required:
       - port@0
       - port@1
-- 
2.34.1