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ACPICA commit 32260f5ce519e854546ce907fc0cc449e1fe51fe Non HDAudio Link Table (NHLT) is designed to separate hardware-related description (registers) from AudioDSP firmware-related one i.e.: pipelines and modules that together make up the audio stream on Intel DSPs. This task is important as same set of hardware registers can be used with different topologies and vice versa, same topology could be utilized with different set of hardware. As the hardware registers description is directly tied to specific platform, intention is to have such description part of low-level firmware e.g.: BIOS. The initial design has been provided in early Sky Lake (SKL) days. The audio architecture goes by the name cAVS. SKL is a representative of cAVS 1.5. The table helps describe endpoint capabilities ever since. While Raptor Lake (RPL) is the last of cAVS architecture - cAVS 2.5 to be precise - its successor, the ACE architecture which begun with Meteor Lake (MTL) inherited the design for all I2S and PDM configurations. These two configurations are the primary targets for NHLT table. Due to naming conflicts with existing code, several structs are named 'nhlt2' rather than 'nhlt'. Follow up changes clean this up once existing code has no users and is removed. Link: https://github.com/acpica/acpica/pull/912 Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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 reStructuredText 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.