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Krzysztof Kozlowski 9004a450fc
 ASoC: codecs: lpass-wsa-macro: Fix speaker quality distortion 
Commit bb4a0f497b ("ASoC: codecs: lpass: Drop unused
AIF_INVALID first DAI identifier") removed first entry in enum with DAI
identifiers, because it looked unused.  Turns out that there is a
relation between DAI ID and "WSA RX0 Mux"-like kcontrols (which use
"rx_mux_text" array).  That "rx_mux_text" array used first three entries
of DAI IDs enum, with value '0' being invalid.

The value passed tp "WSA RX0 Mux"-like kcontrols was used as DAI ID and
set to configure active channel count and mask, which are arrays indexed
by DAI ID.

After removal of first AIF_INVALID DAI identifier, this kcontrol was
updating wrong entries in active channel count and mask arrays which was
visible in reduced quality (distortions) during speaker playback on
several boards like Lenovo T14s laptop and Qualcomm SM8550-based boards.

Reported-by: Alexey Klimov <alexey.klimov@linaro.org>
Fixes: bb4a0f497b ("ASoC: codecs: lpass: Drop unused AIF_INVALID first DAI identifier")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Message-ID: <20250831151401.30897-2-krzysztof.kozlowski@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
History 2025-09-04 17:51:57 +01:00
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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 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.