Spreadtrum DRM master device
================================

The SPRD 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. DPU definitions as defined in
  Documentation/devicetree/bindings/display/sprd/dpu.txt

example:

display-subsystem {
	compatible = "sprd,display-subsystem";
	ports = <&dpu_out>;
};
