Re: [PATCH] ASoC: codecs: wcd938x: fix dB range for HPHL and HPHR

[Mark Brown]

On Fri, Jul 07, 2023 at 03:47:47PM +0200, Takashi Iwai wrote:
> Mark Brown wrote:

> > The ASoC generic control stuff supports inverting the value prior to
> > presentation to userspace so it's masked there (instead of writing the
> > number userspace sees to the register we subtract the number from the
> > maximum value and write that to the register), pulling that up further
> > to the ALSA core might be nice I guess?

> I believe yes.  Though, I'm still not sure how we can improve the
> mismatch of dB min/max.  The dB values of those inverted controls
> reflect the result of subtraction, no?

Yes, the dB scale presented to userspace is reversed relative to the
ordering in the registers.

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