Alexey Klimov
8ad5294849
The audio codec is found in Qualcomm PM2250/PM4125 PMICs and is used on platforms like Qualcomm QCM2290. It has soundwire interface and corresponding RX and TX slave devices. It has only two input channels: HPH left and right. The line output (LO) is linked to HPHL so the hardware has some limitations regarding concurrent playback via HPH and LO for instance. The codec driver also uses WCD MBCH framework. The MBHC functionality is implemented in a minimalistic way to enable IRQs and avoid different issues with IRQs. Co-developed-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com> Signed-off-by: Alexey Klimov <alexey.klimov@linaro.org> Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com> Tested-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com> Link: https://patch.msgid.link/20250915-pm4125_audio_codec_v1-v4-3-b247b64eec52@linaro.org 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 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.