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Xilinx DRM bridge
-----------------
The Xilinx DRM provides the interface layer called Xilinx bridge to bridge
multiple components with a series of functions. It models a simple
unidirectional communication, single client -> single bridge. The client
is not limited to DRM compatible drivers, but can be any subsystem driver,
but the client driver should call the bridge functions explicitly.
Provider
--------
The bridge provider should assign a corresponding of_node to struct xlnx_bridge.
For example, if its own node is used,
provider_node: provider_node {
};
bridge.of_node = provider_device->of_node;
Client
------
The bridge client should have a phandle to the bridge device node. The bridge
device node should be passed to get a bridge instance,
client_node {
xlnx,bridge = <&provider_node>;
};
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