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Depending on which AIF is used the UCM profile needs to setup a different path through the rt5640's "Digital Mixer Path" graph. ATM the UCM profiles solve this by just enabling paths to the outputs / from the input from both AIF1 and AIF2 and then relying on the DAPM framework to power-down the parts of the graph connected to the unused AIF. But in order to be able to use hardware-volumecontrol and to use the hardware mute controls, which are necessary for mute LED control, the UCM profiles need to know which AIF is actually being used. Add a new "aif:1" or "aif:2" part to the component string to provide info about the used AIF to userspace / to the UCM profiles. Note the size of byt_rt5640_components is not increased because the size of 32 chars already is big enough. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20210307150503.34906-3-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.