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The Asus T100HA and T101HA 2-in-1s use a rt5645 family codec and always report that a headset (rather then headphones) are plugged in even when regular headphones are plugged in. And when a headset is used, then the headset-microphone does not work. According to RealTek the ALC3270 variant used in these devices does not support headsets only headphones. Since the ALC3270 is a budget version of the regular ALC5645 codec, I assume that it is using a package with less pins and the headset-mic pin is simply not connected. Detect if the codec is an ALC3270 based on the ACPI HID and if it is an ALC3270 then always report SND_JACK_MICROPHONE as false, so that userspace will not try to use the not-connected headset-mic. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20210306230223.516566-2-hdegoede@redhat.com Signed-off-by: Mark Brown <broonie@kernel.org>
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.