[PATCH RFC 1/8] dt-bindings: display: add Unisoc's drm master bindings

[Kevin Tang]

From: Kevin Tang <kevin.tang at unisoc.com>

The Unisoc DRM master device is a virtual device needed to list all
DPU devices or other display interface nodes that comprise the
graphics subsystem

Cc: Orson Zhai <orsonzhai at gmail.com>
Cc: Baolin Wang <baolin.wang at linaro.org>
Cc: Chunyan Zhang <zhang.lyra at gmail.com>
Signed-off-by: Kevin Tang <kevin.tang at unisoc.com>
---
 Documentation/devicetree/bindings/display/sprd/drm.txt | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sprd/drm.txt

diff --git a/Documentation/devicetree/bindings/display/sprd/drm.txt b/Documentation/devicetree/bindings/display/sprd/drm.txt
new file mode 100644
index 0000000..7327b9e
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sprd/drm.txt
@@ -0,0 +1,18 @@
+Unisoc DRM master device
+================================
+
+The Unisoc DRM master device is a virtual device needed to list all
+DPU devices or other display interface nodes that comprise the
+graphics subsystem.
+
+Required properties:
+- compatible: Should be "sprd,display-subsystem"
+- ports: Should contain a list of phandles pointing to display interface port
+  of DPU devices.
+
+example:
+
+display-subsystem {
+	compatible = "sprd,display-subsystem";
+	ports = <&dpu_out>;
+};
-- 
2.7.4