linux-kernel - [PATCH v2 0/3] soundwire: qcom: add pm runtime support

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Message-Id: <20220224133125.6674-1-srinivas.kandagatla@linaro.org>
Date:   Thu, 24 Feb 2022 13:31:22 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     robh+dt@...nel.org, vkoul@...nel.org,
        yung-chuan.liao@...ux.intel.com
Cc:     pierre-louis.bossart@...ux.intel.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
        quic_srivasam@...cinc.com,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v2 0/3] soundwire: qcom: add pm runtime support

This patchset adds pm runtime support to Qualcomm SounWire Controller using
SoundWire Clock Stop and Wake up using Headset events on supported instances and
instances like WSA which do not support clock stop a soft reset of controller
along with full rest of slaves is done to resume from a low power state.

Tested it on SM8250 MTP and Dragon Board DB845c

--srini

Changes since v1:
 - updated wake irq to not deal with slave pm runtime directly.
 - added delay after soft reset of SoundWire controller where clock stop is not supported


Srinivas Kandagatla (3):
  soundwire: qcom: add runtime pm support
  dt-bindings: soundwire: qcom: document optional wake irq
  soundwire: qcom: add in-band wake up interrupt support

 .../bindings/soundwire/qcom,sdw.txt           |   2 +-
 drivers/soundwire/qcom.c                      | 202 +++++++++++++++++-
 2 files changed, 202 insertions(+), 2 deletions(-)

-- 
2.21.0