Documentation/hid/amd-sfh-hid.rst

1 .. SPDX-License-Identifier: GPL-2.0
4 AMD Sensor Fusion Hub
6 AMD Sensor Fusion Hub (SFH) is part of an SOC starting from Ryzen-based platforms.
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49 sensor data. The layer, which binds each device (AMD SFH HID driver) identifies the device type and
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59 the instance of MP2 layer. It identifies the number of sensors connected using MP2-PCIe layer. Based
60 on that allocates the DRAM address for each and every sensor and passes it to MP2-PCIe driver. On
61 enumeration of each sensor, client layer fills the HID Descriptor structure and HID input report
63 sensor to sensor.
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73 3. Supported sensor info via P2C registers.
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85        HID             AMD            AMD                       AMD -PCIe             MP2
90         |		|	       |                        MP2-PCIe Int         |
92         |		|	       |---Get Number of sensors-> |                 |
97         |		|	       |----------------------|    |                 |
105         |		|              |----------------------|    |                 |
107         |	        |<--Probe------|                           |---Sensor CMD--> |
117         |<------------- |	       |			   |                 |
121 ------------------------------------------------
132                 |------------->|              |                           |                 |
135 	        |              |------------->|------------------------|  |                 |
137 	        |              |              |  requested sensor and  |  |                 |
140 	        |              |              |------------------------|  |                 |
143     To	        |<-------------|<-------------|                           |                 |
145         <-------|              |              |                           |                 |