36ed0958fe
From Sandeep Singh.
AMD SFH (Sensor Fusion Hub) is HID based driver.SFH FW is part of MP2 processor
(MP2 which is an ARM core connected to x86 for processing sensor data) and it
runs on MP2 where in the driver resides on X86. The driver functionalities are
divided into three parts:
1: amd-mp2-pcie:- This part of the module will communicate with MP2
firmware. MP2 which is exposed as a PCI device to the
X86, uses mailboxes to talk to MP2 firmware to
send/receive commands.
2: Client Layer:- This part of the driver will use DRAM data and convert
the data into HID format based on HID reports.
3: Transport layer :- This part of the driver the will communicate with HID
core.Communication between devices and HID core is
mostly done via HID reports
In terms of architecture, it resembles like ISH (Intel Integrated Sensor Hub).
However the major difference is all the hid reports are generated as part of
the kernel driver.
AMD SFH is integrated as a part of SoC, starting from 17h family of processors.
The solution is working well on several OEM products. AMD SFH uses HID over
PCIe bus.
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.