[PATCH] dt-bindings: display: bridge: ldb: Require reg property only for i.MX6SX/8MP LDBs

[Liu Ying]

LDB's parent device could be a syscon which doesn't allow a reg property
to be present in it's child devices, e.g., NXP i.MX93 Media blk-ctrl
has a child device NXP i.MX93 Parallel Display Format Configuration(PDFC)
without a reg property(LDB is also a child device of the Media blk-ctrl).
To make the LDB schema be able to describe LDBs without the reg property
like i.MX93 LDB, require the reg property only for i.MX6SX/8MP LDBs.

Fixes: 8aa2f0ac08d3 ("dt-bindings: display: bridge: ldb: Add check for reg and reg-names")
Signed-off-by: Liu Ying <victor.liu@xxxxxxx>
---
 .../bindings/display/bridge/fsl,ldb.yaml           | 23 ++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml b/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml
index 7f380879fffd..5f6dc2b11d7b 100644
--- a/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml
@@ -28,6 +28,7 @@ properties:
     const: ldb
 
   reg:
+    minItems: 1
     maxItems: 2
 
   reg-names:
@@ -68,7 +69,6 @@ required:
   - compatible
   - clocks
   - ports
-  - reg
 
 allOf:
   - if:
@@ -83,12 +83,23 @@ allOf:
         ports:
           properties:
             port@2: false
+
   - if:
-      not:
-        properties:
-          compatible:
-            contains:
-              const: fsl,imx6sx-ldb
+      properties:
+        compatible:
+          contains:
+            enum:
+              - fsl,imx6sx-ldb
+              - fsl,imx8mp-ldb
+    then:
+      required:
+        - reg
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,imx8mp-ldb
     then:
       required:
         - reg-names

---
base-commit: 3b058d1aeeeff27a7289529c4944291613b364e9
change-id: 20260329-fsl_ldb_schema_fix-4fe01c42bff3

Best regards,
-- 
Liu Ying <victor.liu@xxxxxxx>