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A mirror of the official Linux kernel repository just in case
7c70825d16
Merge series from Johan Hovold <johan+linaro@kernel.org>: To reduce the risk of speaker damage the PA gain needs to be limited on machines like the Lenovo Thinkpad X13s until we have active speaker protection in place. Limit the gain to the current default setting provided by the UCM configuration which most user have so far been using (due to a bug in the configuration files which prevented hardware volume control [1]). The wsa883x PA volume control also turned out to be broken, which meant that the default setting used by UCM configuration is actually the lowest level (-3 dB). With the codec driver fixed, hardware volume control also works as expected. Note that the new wsa884x driver most likely suffers from a similar bug, I'll send a fix for that once I've got that confirmed. Included is also a related fix for the LPASS WSA macro driver, which was changing the digital gain setting behind the back of user space and which can result in excessive (or too low) digital gain. There are further Qualcomm codec drivers that similarly appear to manipulate various gain settings, but on closer inspection it turns out that they only write back the current settings. Tests reveal that these writes are indeed needed for any prior updates to take effect (at least for the WSA and RX macros). [1] https://github.com/alsa-project/alsa-ucm-conf/pull/382 |
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| include | ||
| init | ||
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| ipc | ||
| kernel | ||
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| samples | ||
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| security | ||
| sound | ||
| tools | ||
| usr | ||
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| .editorconfig | ||
| .get_maintainer.ignore | ||
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| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
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| README | ||
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.