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ba9e82a1c8
ASoC is using dai_link which specify DAI format (= dai_link->dai_fmt), and it is selected by "Sound Card" driver in corrent implementation. In other words, Sound Card *needs* to setup it. But, it should be possible to automatically selected from CPU and Codec driver settings. This patch adds new .auto_selectable_formats support at snd_soc_dai_ops. By this patch, dai_fmt can be automatically selected from each driver if both CPU / Codec driver had it. Automatically selectable *field* is depends on each drivers. For example, some driver want to select format "automatically", but want to select other fields "manually", because of complex limitation. Or other example, in case of both CPU and Codec are possible to be clock provider, but the quality was different. In these case, user need/want to *manually* select each fields from Sound Card driver. This .auto_selectable_formats can set priority. For example, no limitaion format can be HI priority, supported but has picky limitation format can be next priority, etc. It uses Sound Card specified fields preferentially, and try to select non-specific fields from CPU and Codec driver automatically if all drivers have .auto_selectable_formats. In other words, we can select all dai_fmt via Sound Card driver same as before. Link: https://lore.kernel.org/r/871rb3hypy.wl-kuninori.morimoto.gx@renesas.com Link: https://lore.kernel.org/r/871racbx0w.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Link: https://lore.kernel.org/r/87h7ionc8s.wl-kuninori.morimoto.gx@renesas.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.