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315c23a64e
The Realtek wifi 5 devices which support USB 3 are weird: when first plugged in, they pretend to be USB 2. The driver needs to send some commands to the device, which make it disappear and come back as a USB 3 device. Implement the required commands in rtw88. When a USB 3 device is plugged into a USB 2 port, rtw88 will try to switch it to USB 3 mode only once. The device will disappear and come back still in USB 2 mode, of course. Some people experience heavy interference in the 2.4 GHz band in USB 3 mode, so add a module parameter switch_usb_mode with the default value 1 to let people disable the switching. Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com> Acked-by: Ping-Ke Shih <pkshih@realtek.com> Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> Link: https://patch.msgid.link/77906c62-5674-426f-bde1-1b2a12a0339d@gmail.com
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 reStructuredText 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.