ef6069f3f6
Merge series from Peter Ujfalusi <peter.ujfalusi@linux.intel.com>: The main aim of the series is to provide a mechanism to fallback to 'older' IPC versions in case the desired one is missing either a firmware or topology file. It is going to make the life of users and distributions if we are going to start transition existing IPC3 platforms to IPC4 (CAVS2.5) and we might have missed some topology file to convert for example. In that case the kernel will fallback to IPC3 without audio regression. To be able to support this we needed to change the probe sequence to know the topology filename earlier and check if it is present in the filesystem. No functional changes for now, the default IPC versions have not been changed.
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.