ASoC: SoundWire codecs: improve pm_runtime handling
Merge series from Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>: 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. b) enabling pm_runtime when the codec reports as ATTACHED also creates a problematic case when the ASoC pm_runtime_get_sync() will silently fail due to the -EACCESS error handling. This can happen when playback starts before the codec is enumerated. This patchset modifies the initial stages so that codecs are pm_runtime enabled in the .probe() callback, but become pm_runtime 'active' only when they report present. This is better aligned with the design of the pm_runtime helpers and improved CI results significantly. This patchset modifies all existing SoundWire codecs (except Qualcomm ones), but the pattern of changes is exactly the same in all patches.
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