Re: [PATCH] ASoC: rt722-sdca: add FU06 Playback Switch for speaker mute control

[Charles Keepax <ckeepax@opensource.cirrus.com>]

On Fri, Apr 24, 2026 at 03:09:10PM +0200, Pierre-Louis Bossart wrote:
> On 4/24/26 05:52, Aaron Ma wrote:
> > On Thu, Apr 23, 2026 at 9:01 PM Pierre-Louis Bossart
> > <pierre-louis.bossart@linux.dev> wrote:
> >> On 4/23/26 12:13, Aaron Ma wrote:
> While I am at it, in theory those registers are Dual-Ranked,
> with a 'commit' mechanism to deal with all volume changes
> at the same time. We'll need to add support for Dual-Ranked
> registers at some point, not sure how this can be bolted in
> regmap support... Cc: Charles for future SDCA improvements...

Eek... *hides in dark corner*. Yeah at some point we do need
to do some thinking about dual ranked controls, at the moment
there is no support. As far as my thinking got was really it
is in a lot of situations hard to tell which writes you want
to group. There is some low hanging fruit, for example stereo
volumes would make sense to group if dual ranked. Although in
those cases I tend to see user-space changing the volumes one
channel at a time anyway. And that is even before you get to the
regmap implementation details which is foggy at best in my mind.

Sorry I don't have more, it is loosely on my virtual todo list,
but definitely not something I have got around to thinking
through yet.

Thanks,
Charles