[PATCH v4 1/3] dt-bindings: display: panel: add common dual-link schema

[Krzysztof Kozlowski]

Add schema with common properties shared among dual-link panel ICs.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>

---

Changes since v3:
1. Re-phrase description of binding and ports (Laurent)
v3: https://lore.kernel.org/all/20230823081500.84005-1-krzysztof.kozlowski@linaro.org/

Changes since v2:
1. New Patch
v2: https://lore.kernel.org/all/20230502120036.47165-1-krzysztof.kozlowski@linaro.org/
v1: https://lore.kernel.org/all/20230416153929.356330-1-krzysztof.kozlowski@linaro.org/
---
 .../display/panel/panel-common-dual.yaml      | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/panel-common-dual.yaml

diff --git a/Documentation/devicetree/bindings/display/panel/panel-common-dual.yaml b/Documentation/devicetree/bindings/display/panel/panel-common-dual.yaml
new file mode 100644
index 000000000000..cc7ea3c35c77
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/panel-common-dual.yaml
@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/panel-common-dual.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common Properties for Dual-Link Display Panels
+
+maintainers:
+  - Thierry Reding <thierry.reding at gmail.com>
+  - Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
+
+description:
+  Properties common for Panel IC supporting dual link panels.  Devices might
+  support also single link.
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+    additionalProperties: false
+
+    properties:
+      port at 0:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: First link
+
+      port at 1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Second link
+
+      "#address-cells": true
+      "#size-cells": true
+
+    required:
+      - port at 0
+
+# Single-panel setups are still allowed.
+oneOf:
+  - required:
+      - ports
+  - required:
+      - port
+
+additionalProperties: true
-- 
2.34.1