ASoC: qcom: Parse "pin-switches" and "widgets" from DT

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Merge series from Stephan Gerhold <stephan@gerhold.net>:

Some sound card setups might require extra pin switches to allow
turning off certain audio components. simple-card supports this
already using the "pin-switches" and "widgets" device tree property.
This series makes it possible to use the same properties for the Qcom
sound cards.

To implement that, the function that parses the "pin-switches" property
in simple-card-utils.c is first moved into the ASoC core. Then two
simple function calls are added to the common Qcom sound card DT parser.
Finally there is a small patch for the msm8916-wcd-analog codec to make
it possible to model sound card setups used in some MSM8916 smartphones.
(See PATCH 2/4 for an explanation of some real example use cases.)

Using pin switches rather than patching codec drivers with switches was
originally suggested by Mark Brown on a patch for the tfa989x codec:
https://lore.kernel.org/alsa-devel/YXaMVHo9drCIuD3u@sirena.org.uk/

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Mark Brown 2021-12-23 19:38:13 +00:00

parent 4e28491a7a 319a05330f

commit 2f15d3cebd

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6 changed files with 82 additions and 47 deletions

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16

Documentation/devicetree/bindings/sound/qcom,sm8250.yaml

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1

include/sound/soc.h

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sound/soc/codecs/msm8916-wcd-analog.c

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45

sound/soc/generic/simple-card-utils.c

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sound/soc/qcom/common.c

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sound/soc/soc-core.c

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