Skip to content
Commit f9031288 authored by Pierre-Louis Bossart's avatar Pierre-Louis Bossart Committed by Vinod Koul
Browse files

soundWire: intel_auxdevice: resume 'sdw-master' on startup and system resume

The SoundWire bus is handled with a dedicated device, which is placed
between the Intel auxiliary device and peripheral devices, e.g.

soundwire_intel.link.0/sdw-master-0/sdw:0:025d:0711:01

The functionality of this 'sdw-master' device is limited, specifically
for pm_runtime the ASoC framework will not rely on
pm_runtime_get_sync() since it does not register any components. It
will only change status thanks to the parent-child relationship which
guarantees that the 'sdw-master' device will be pm_runtime resumed
before any peripheral device.

However on startup and system resume it's possible that only the
auxiliary device is pm_runtime active, and the peripheral will only
become active during its io_init routine, leading to another
occurrence of the error reported by the pm_runtime framework:

rt711 sdw:0:025d:0711:00: runtime PM trying to activate child device
sdw:0:025d:0711:00 but parent (sdw-master-0) is not active

This patch suggests aligning the sdw-master device status to that of
the auxiliary device. The difference between the two is completely
notional and their pm_status shouldn't be different during the startup
and system resume steps.

This problem was exposed by recent changes in the timing of the bus
reset, but was present in this driver since we introduced pm_runtime
support.

Closes: https://github.com/thesofproject/linux/issues/4328


Signed-off-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: default avatarRanjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: default avatarRander Wang <rander.wang@intel.com>
Signed-off-by: default avatarBard Liao <yung-chuan.liao@linux.intel.com>
Tested-by: default avatarCharles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230803065220.3823269-3-yung-chuan.liao@linux.intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 3d71f43f
Loading
Loading
Loading
Loading
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Please register or to comment