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Unverified Commit 4ea3bfd1 authored by Pierre-Louis Bossart's avatar Pierre-Louis Bossart Committed by Mark Brown
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ASoC: SOF: pcm: use pm_resume_and_get() on component probe

Before initiating IPC and/or bus transactions when loading the
topology during a component probe, which happens on card
registration/creation, make sure the device for the SOF driver is
pm_runtime active.

The SOF probe is not necessarily followed by the component probe, such
a timing assumption can be broken in driver bind/unbind tests. This
can be artifially shown if the module for the machine driver is
'blacklisted' and the SOF device becomes pm_runtime_suspended before
manually calling modprobe to register the card.

In an initial experiment, pm_resume_and_get() was called from
soc-component.c, since the current ASoC component model is arguably
missing dependencies between component status and device
status. However this approach proved too invasive and breaks all
existing HDMI playback solutions on Intel platforms.

While this will result in duplication of code, generating pm_runtime
transitions only if strictly required for a given component makes more
sense overall. This patch adds the pm_runtime resume transition for
SOF only.

BugLink: https://github.com/thesofproject/linux/issues/3651


Signed-off-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: default avatarRander Wang <rander.wang@intel.com>
Reviewed-by: default avatarRanjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: default avatarBard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: default avatarPéter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20220616210825.132093-2-pierre-louis.bossart@linux.intel.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent ba46bd04
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