Ranjani Sridharan 82b18242ae
ASoC: SOF: pcm: do not free widgets during suspend trigger
IPC3 and IPC4 have different requirements for the order in which the FE
CPU and BE CPU DAI trigger callbacks must be invoked. With a regular PCM
start/stop, pipeline widgets are set up during hw_params and freed
during hw_free.

But when the system is suspended when a PCM is running,
pipeline widgets are freed during the SUSPEND trigger callback for the
FE CPU DAI. In order to avoid freeing the pipeline widgets before the BE
CPU DAI trigger is executed, the trigger order was modified in previous
contributions in the PCM dai_link_fixup callback to make sure that the BE
CPU DAI trigger stop/suspend is always invoked before the FE CPU DAI
trigger. But this contradicts the firmware requirement for IPC4 w.r.t.
ordering of pipeline triggers.

So, remove the freeing of pipeline widgets during FE CPU DAI suspend
trigger and handle it during system suspend when the
tear_down_all_pipelines() IPC op is invoked. This will be followed up
with a patch to fix the trigger order for IPC4.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20230127120031.10709-6-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-01-27 12:14:02 +00:00
2023-01-26 17:04:48 +00:00
2022-12-19 12:33:32 -06:00
2022-12-12 17:28:58 -08:00
2022-12-04 01:59:16 +01:00
2022-12-15 11:12:21 -08:00
2022-12-14 09:15:43 -08:00
2022-12-12 17:28:58 -08:00
2022-09-28 09:02:20 +02:00
2022-10-10 12:00:45 -07:00
2022-12-21 16:28:25 -08:00
2022-12-25 13:41:39 -08:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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