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Merge series from Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>: Existing HDaudio controllers expose an HDAudio DMA which is used to interface with HDaudio codecs. All other interfaces supported by Intel (SoundWire, SSP, DMIC) rely for data transfers on another GP-DMA managed by the DSP firmware - the HDaudio DMA is only used for memory-to-DSP transfers. New HDaudio extensions will enable the use of this HDaudio DMA for all of SoundWire, SSP, DMIC. These extensions will be backwards-compatible for HDaudio and iDISP codecs, but will require new programming sequences and DAI callbacks for SoundWire, SSP and DMIC. Before we add support for 'extended audio links' and the programming sequences for the DMA, we need to refactor the code. All HDaudio codec support needs to be well identified in a separate file, and likewise all the 'multi-link' handling needs to be better split. This patchset removes a number of 'old' Kconfig dependencies and options, adds helpers with a fallback to remove IS_ENABLED checks in the code and tries to simplify programming sequences when possible. One indirect benefit from this refactoring is that developers can switch with a kernel parameter from HDaudio support to a variant of 'nocodec' support. This proves extremely useful to test on existing Intel RVPs and Up boards, where the same build can be used to check 3 interfaces (HDaudio, SSP, DMIC) by just removing modules, setting the kernel parameter and reloading modules. |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.