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Implement suspend/resume() operations for component drivers. For most scenarios, the PM flow is similar to standard streaming one, except for the part where the position register are being saved and the lack of PCM pages freeing. To reduce code duplication, all avs_dai_suspend_XXX() and avs_dai_resume_XXX() functions reuse their non-PM equivalents. Given that path binding/unbinding happens only in FE part of the stream, the order of suspend() goes: 1. hw_free() all FE DAIs, paths are unbound here 2. hw_free() all BE DAIs Consequently, for resume() its: 1. hw_params() all BE DAIs 2. hw_params() all FE DAIs, paths are bound here 3. prepare() all BE DAIs 4. prepare() all FE DAIs As component->suspend/resume() do not provide substream pointer, store it ourselves so that the PM flow has all the necessary information to proceed. Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com> Link: https://lore.kernel.org/r/20221027124702.1761002-3-cezary.rojewski@intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
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.