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Rockchip DRM master device
================================
The Rockchip DRM master device is a virtual device needed to list all
vop devices or other display interface nodes that comprise the
graphics subsystem.
Required properties:
- compatible: Should be "rockchip,display-subsystem"
- ports: Should contain a list of phandles pointing to display interface port
of vop devices. vop definitions as defined in
Documentation/devicetree/bindings/video/rockchip-vop.txt
example:
display-subsystem {
compatible = "rockchip,display-subsystem";
ports = <&vopl_out>, <&vopb_out>;
};