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Merge series from Peter Ujfalusi <peter.ujfalusi@linux.intel.com>: The MOD_INIT_INSTANCE message contains a CPC (Cycles Per Chunk/processing unit) parameter. This CPC value is used by the firmware to calculate the total cycles needed by the enabled module instances and based on this it can decide to set the frequency of the DSP core(s). The manifest section of the firmware image contains a module configuration section, where a per module table of configurations are listed with measured CPC values as triplet of IBS/IBS/CPC (Input/Output buffer size - corresponding to the selected audio format). In case the CPC value is 0 (missing from the manifest or the configuration cannot be matched) the firmware will force the DSP cores to maximum speed to avoid audio glitches due to starvation. In these cases the kernel will print a warning message to let the SOF developers know about the gap and provide information to correct it with a firmware update.
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.