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58de1f91e0
The register REG_SYS_CFG1 is used to determine chip basic information as arguments of following flows, such as download firmware and load PHY parameters, so driver read the value early (before power-on). However, the direct IO is disallowed before power-on, or it causes wrong values, which driver recognizes a chip as a wrong type RF_1T1R, but actually RF_2T2R, causing driver warns: rtw88_8822cs mmc1:0001:1: unsupported rf path (1) Fix it by using indirect IO before power-on. Reported-by: Piotr Oniszczuk <piotr.oniszczuk@gmail.com> Closes: https://lore.kernel.org/linux-wireless/699C22B4-A3E3-4206-97D0-22AB3348EBF6@gmail.com/T/#t Suggested-by: Bitterblue Smith <rtl8821cerfe2@gmail.com> Tested-by: Piotr Oniszczuk <piotr.oniszczuk@gmail.com> Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> Link: https://patch.msgid.link/20250724004815.7043-1-pkshih@realtek.com |
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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.