[RFC 2/2] ASoC: rt5670: Add LED trigger support

[Mark Brown]

On Tue, Feb 23, 2021 at 05:14:32PM +0100, Jaroslav Kysela wrote:
> Dne 23. 02. 21 v 15:21 Takashi Iwai napsal(a):

> > That's one of my concerns in the recent actions for putting the
> > hard-coded mute LED controls.  So far, the only usage of led-audio
> > trigger is HD-audio, and it's enabled only for selected devices and
> > setups.  OTOH, if we apply the audio-led trigger generically in ASoC
> > codec driver, it's always done and might misfit; e.g. what happens if
> > two codecs are present on the system?.

> That's the abstraction issue. We can use PCI, ACPI, DMI or DT checks at the
> _right_ place (machine top-level code) to mark those controls with the LED
> flags in the kernel space. I've never said that the right place is the generic
> ASoC codec driver.

We already need ACPI and DMI quirks in the CODEC drivers anyway due to
the limitations of ACPI so it wouldn't be particularly surprising to
have stuff there.  OTOH this would fix things per machine while with
fancier hardware things might easily be flexible enough that there's
multiple choices that could be made depending on use case.

I'd be a lot more comfortable with ASoC having some runtime control for
overriding which controls get mapped, even if we try to pick defaults
with quirks.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: not available
URL: <http://mailman.alsa-project.org/pipermail/alsa-devel/attachments/20210223/3d35632a/attachment.sig>