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40e4046913Rename 'Mono DAC Playback Volume' to 'DAC2 Playback Volume' and move it from rt5640_specific_snd_controls[] to rt5640_snd_controls[]. The RT5640_DAC2_DIG_VOL register controlled by this mixer-element has nothing to do with the Mono (Amplified) output which is only available on the ALC5640 chip and not on the ALC5642 chip. The RT5640_DAC2_DIG_VOL volume-control is the main volume control for audio coming from the I2S2 / AIF2 input of the chip and as such is also available on the ALC5642. This commit results in the following userspace visible changes: 1. On devices with an ACL5640 codec, the 'Mono DAC Playback Volume' control is renamed to 'DAC2 Playback Volume' allowing the alsa-lib mixer code to properly group it with the 'DAC2 Playback Switch' which is controlling the mute bits in the RT5640_DAC2_DIG_VOL register. Note the removal of the 'Mono DAC Playback Volume' is not an issue for userspace because the UCM profiles do not use it (the UCM profiles are shared betweent the 5640 and 5642 and only the 5640 had this control). 2. On devices with an ACL5642 codec, there now will be a new 'DAC2 Playback Volume', grouped with the 'DAC2 Playback Switch' Having a complete 'DAC2 Playback Volume' / 'DAC2 Playback Switch' pair on both variants will allow enabling hardware-volume control by setting the UCM PlaybackMasterElem to "DAC2" on devices where the I2S2/AIF2 interface of the codec is used. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20210307150503.34906-2-hdegoede@redhat.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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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.