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45 AMD HID Transport Layer
49 sensor data. The layer, which binds each device (AMD SFH HID driver) identifies the device type and
50 registers with the HID core. Transport layer attaches a constant "struct hid_ll_driver" object with
52 used by HID core to communicate with the device. AMD HID Transport layer implements the synchronous…
54 AMD HID Client Layer
56 This layer is responsible to implement HID requests and descriptors. As firmware is OS agnostic, HID
57 client layer fills the HID request structure and descriptors. HID client layer is complex as it is
58 interface between MP2 PCIe layer and HID. HID client layer initializes the MP2 PCIe layer and holds
59 the instance of MP2 layer. It identifies the number of sensors connected using MP2-PCIe layer. Based
61 enumeration of each sensor, client layer fills the HID Descriptor structure and HID input report
65 AMD MP2 PCIe layer
67 MP2 PCIe Layer is responsible for making all transactions with the firmware over PCIe.
76 interrupt to MP2. The client layer allocates the physical memory and the same is sent to MP2 via
77 the PCI layer. MP2 firmware writes the command output to the access DRAM memory which the client
78 layer has allocated. Firmware always writes minimum of 32 bytes into DRAM. So as a protocol driver
86        Core         Transport      Client layer                   layer                FW