linux-kernel - Re: [PATCH v4 0/5] soundwire: add static port map support

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Date:   Mon, 15 Mar 2021 12:10:46 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        broonie@...nel.org, vkoul@...nel.org
Cc:     robh@...nel.org, devicetree@...r.kernel.org,
        yung-chuan.liao@...ux.intel.com, sanyog.r.kale@...el.com,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: [PATCH v4 0/5] soundwire: add static port map support



On 3/15/21 11:56 AM, Srinivas Kandagatla wrote:
> In some cases, SoundWire device ports are statically mapped to Controller
> ports during design, however there is no way to expose this information
> to the controller. Controllers like Qualcomm ones use this info to setup
> static bandwidth parameters for those ports.
> 
> A generic port allocation is not possible in this cases!
> This patch adds a new member m_port_map to SoundWire device so that
> it can populate the static master port map and share it with controller
> to be able to setup correct bandwidth parameters.
> 
> As a user of this feature this patchset also adds new bindings for
> wsa881x smart speaker which has 4 ports which are statically mapped
> to the 3 output and 1 input port of the controller.
> 
> Tested it on DB845c and SM8250 MTP.
> 
> thanks,
> srini

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

> Changes since v3:
> 	- updated kernel doc for more clarity on m_port_map
> 
> Srinivas Kandagatla (5):
>    soundwire: add static port mapping support
>    soundwire: qcom: update port map allocation bit mask
>    soundwire: qcom: add static port map support
>    ASoC: dt-bindings: wsa881x: add bindings for port mapping
>    ASoC: codecs: wsa881x: add static port map support
> 
>   .../bindings/sound/qcom,wsa881x.yaml          |  9 ++++++
>   drivers/soundwire/qcom.c                      | 31 +++++++++++++++----
>   include/linux/soundwire/sdw.h                 |  2 ++
>   sound/soc/codecs/wsa881x.c                    |  7 +++++
>   4 files changed, 43 insertions(+), 6 deletions(-)
>