[PATH 3/4] dt-bindings: display: Add virtual DRM

[Tomohito Esaki]

Add device tree bindings documentation for virtual DRM.

Signed-off-by: Tomohito Esaki <etom at igel.co.jp>
---
 .../devicetree/bindings/display/vdrm.yaml     | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/vdrm.yaml

diff --git a/Documentation/devicetree/bindings/display/vdrm.yaml b/Documentation/devicetree/bindings/display/vdrm.yaml
new file mode 100644
index 000000000000..6493bb0fc09f
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/vdrm.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/vdrm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Virtual DRM Device Tree Bindings
+
+description:
+  This document defines device tree properties virtual DRM. The initial
+  position, size and z-position of the plane used in the virtual DRM is
+  specified.
+  The current limitation is that these settings are applied to all crtc.
+
+properties:
+  compatible:
+    const: virt-drm
+
+patternProperties:
+  "^plane(@.*)?$":
+    description: Information of the planes used in virtual DRM
+    type: object
+
+    properties:
+      x:
+        type: int
+        description: x-coordinate of the left-top of the plane in pixels
+
+      y:
+        type: int
+        description: y-coordinate of the left-top of the plane in pixels
+
+      width:
+        type: int
+        description: width of the plane in pixels
+
+      height:
+        type: int
+	description: height of the plane in pixels
+
+      zpos:
+        type: int
+        description: z-position of the plane
+
+    required:
+      - x
+      - y
+      - width
+      - height
+      - zpos
+
+required:
+  - compatible
+  - "^plane(@.*)?$"
+
+examples:
+ - |
+   vdrm at 0 {
+       compatible = "virt-drm";
+       plane at 0 {
+           x = <200>;
+	   y = <100>;
+	   width = <800>;
+	   height = <600>;
+	   zpos = <1>;
+       };
+   };
-- 
2.25.1