Establish DFP and UFP roles between two attached ports

In addition to DFP and UFP, the Type-C specification also defines DRP (Dual Role Port). A DRP can function as either a DFP or a UFP, capable of both supplying and receiving power. When a DRP connects to a UFP device, it converts to a DFP. When a DRP connects to a DFP device, it converts to a UFP. When two DRP devices connect to each other, they randomly assign roles, with one acting as the DFP and the other as the UFP.


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