[PATCH 0/2] soundwire: improve pm_runtime handling

From: Bard Liao
Date: Thu Aug 03 2023 - 02:25:01 EST

This patchset improves the pm_runtime behavior in rare corner cases
identified by the Intel CI in the last 6 months.

a) in stress-tests, it's not uncommon to see the following type of
warnings when the codec reports as ATTACHED

"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 warning was not correlated with any functional issue, but it
exposed a design issue on when to enable pm_runtime. The recommended
practice in the pm_runtime documentation is to keep the devices in
'suspended' mode and mark them as 'active' when they are really

Pierre-Louis Bossart (2):
soundwire: intel_auxdevice: enable pm_runtime earlier on startup
soundWire: intel_auxdevice: resume 'sdw-master' on startup and system

drivers/soundwire/intel_auxdevice.c | 27 +++++++++++++++++++--------
1 file changed, 19 insertions(+), 8 deletions(-)