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 functional.
Pierre-Louis Bossart (2): soundwire: intel_auxdevice: enable pm_runtime earlier on startup soundWire: intel_auxdevice: resume 'sdw-master' on startup and system resume
drivers/soundwire/intel_auxdevice.c | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-)