linux-kernel - Re: [PATCH v3 0/7] ASoC: codecs: add wcd938x support

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Date:   Fri, 19 Mar 2021 11:09:06 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        broonie@...nel.org
Cc:     robh@...nel.org, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        lgirdwood@...il.com
Subject: Re: [PATCH v3 0/7] ASoC: codecs: add wcd938x support



On 3/19/21 4:29 AM, Srinivas Kandagatla wrote:
> This patchset adds support for Qualcomm WCD938X codec.
> 
> Qualcomm WCD9380/WCD9385 Codec is a standalone Hi-Fi audio codec IC
> connected over SoundWire. This device has two SoundWire devices, RX and
> TX respectively supporting 4 x ADCs, ClassH, Ear, Aux PA, 2xHPH,
> 7 x TX diff inputs, 8 DMICs and MBHC.
> 
> Even though this device has two SoundWire devices, only tx device has
> access to main codec Control/Status Registers!

That part is a new concept we haven't seen so far with SoundWire 
support, and I added a number of comments in the patches.

It would really help if you could add more explanations on how 
regmap/pm_runtime/gpios/regulators/interrupts are supposed to work with 
such a functional split. Thanks!

> This patchset along with other SoundWire patches on the list
> have been tested on SM8250 MTP device.
> 
> Am planning to send support for MBHC once this driver gets accepted!
> 
> Thanks,
> srini
> 
> Many thanks for reviewing v2.
> 
> 
> Changes since v2:
> 	- fixed dt_binding_check error
> 
> 
> Srinivas Kandagatla (7):
>    ASoC: dt-bindings: wcd938x: add bindings for wcd938x
>    ASoC: codecs: wcd-clsh: add new version support
>    ASoC: codecs: wcd938x: add basic driver
>    ASoC: codecs: wcd938x: add basic controls
>    ASoC: codecs: wcd938x: add playback dapm widgets
>    ASoC: codecs: wcd938x: add capture dapm widgets
>    ASoC: codecs: wcd938x: add audio routing
> 
>   .../bindings/sound/qcom,wcd938x.yaml          |  165 +
>   sound/soc/codecs/Kconfig                      |    9 +
>   sound/soc/codecs/Makefile                     |    2 +
>   sound/soc/codecs/wcd-clsh-v2.c                |  350 +-
>   sound/soc/codecs/wcd-clsh-v2.h                |   16 +
>   sound/soc/codecs/wcd938x-sdw.c                |  291 ++
>   sound/soc/codecs/wcd938x.c                    | 3623 +++++++++++++++++
>   sound/soc/codecs/wcd938x.h                    |  676 +++
>   8 files changed, 5122 insertions(+), 10 deletions(-)
>   create mode 100644 Documentation/devicetree/bindings/sound/qcom,wcd938x.yaml
>   create mode 100644 sound/soc/codecs/wcd938x-sdw.c
>   create mode 100644 sound/soc/codecs/wcd938x.c
>   create mode 100644 sound/soc/codecs/wcd938x.h
>