linux-kernel - [PATCH v3 0/5] soundwire: add static port map support

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Message-Id: <20210312113929.17512-1-srinivas.kandagatla@linaro.org>
Date:   Fri, 12 Mar 2021 11:39:24 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     broonie@...nel.org, vkoul@...nel.org
Cc:     robh@...nel.org, devicetree@...r.kernel.org,
        yung-chuan.liao@...ux.intel.com,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        linux-kernel@...r.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v3 0/5] soundwire: add static port map support

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

Changes since v2:
	- fixed dt_binding_check error and kernel test robot reported errors
	- updated comments as suggested by Pierre
	- updated wsa881x to populate m_ports from valid index.

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(-)

-- 
2.21.0