dt-bindings: display: bridge: lt9211: Require data-lanes on DSI input ports

The Lontium LT9211 is capable of 1..4 DSI lanes per input DSI port,
describe the lane count for each input port in the schema.

For example Linux kernel driver does already use that information and
fails to probe if it is missing.

Signed-off-by: Marek Vasut <marex@nabladev.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260407203109.34302-1-marex@nabladev.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

diff --git a/Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml b/Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml
index 9a6e9b25d14a93d7ec65768865e4a860119a0865..7cfe92a8bcd7215c74e1f3bb0c901efbd596f7bb 100644 (file)
--- a/Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml
@@ -36,18 +36,56 @@ properties:
 
     properties:
       port@0:
-        $ref: /schemas/graph.yaml#/properties/port
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
         description:
           Primary MIPI DSI port-1 for MIPI input or
           LVDS port-1 for LVDS input or DPI input.
 
+        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:
+              - data-lanes
+
       port@1:
-        $ref: /schemas/graph.yaml#/properties/port
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
         description:
           Additional MIPI port-2 for MIPI input or LVDS port-2
           for LVDS input. Used in combination with primary
           port-1 to drive higher resolution displays
 
+        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:
+              - data-lanes
+
       port@2:
         $ref: /schemas/graph.yaml#/properties/port
         description:
@@ -99,6 +137,7 @@ examples:
             reg = <0>;
 
             endpoint {
+              data-lanes = <1 2 3 4>;
               remote-endpoint = <&dsi0_out>;
             };
           };