dt-bindings: simple-framebuffer: Add requirement for pipelines

Both the allwinner and amlogic compatibles require that either the
allwinner,pipeline or the amlogic,pipeline property is set. This was
dropped during the conversion since we didn't have conditionals back then,
but we can express this properly now.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/display/simple-framebuffer.yaml b/Documentation/devicetree/bindings/display/simple-framebuffer.yaml
index c8d73ef010b5..678776b6012a 100644
--- a/Documentation/devicetree/bindings/display/simple-framebuffer.yaml
+++ b/Documentation/devicetree/bindings/display/simple-framebuffer.yaml
@@ -126,6 +126,28 @@ required:
   # but usually they will be filled by the bootloader.
   - compatible
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: allwinner,simple-framebuffer
+
+    then:
+      required:
+        - allwinner,pipeline
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: amlogic,simple-framebuffer
+
+    then:
+      required:
+        - amlogic,pipeline
+
+
 additionalProperties: false
 
 examples:
@@ -140,6 +162,7 @@ examples:
       stdout-path = "display0";
       framebuffer0: framebuffer@1d385000 {
         compatible = "allwinner,simple-framebuffer", "simple-framebuffer";
+        allwinner,pipeline = "de_be0-lcd0";
         reg = <0x1d385000 3840000>;
         width = <1600>;
         height = <1200>;