Re: [PATCH RESEND] ARM: dts: OMAP3-N900: Add microphone bias voltages

[Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>]

* Jarkko Nikula <jarkko.nikula-FVTvWyuFUl3QT0dZR+AlfA@public.gmane.org> [150330 10:46]:
> On 03/30/2015 07:42 PM, Tony Lindgren wrote:
> > * Jarkko Nikula <jarkko.nikula-FVTvWyuFUl3QT0dZR+AlfA@public.gmane.org> [150330 09:31]:
> >> On 03/01/2015 09:07 PM, Jarkko Nikula wrote:
> >>> From: Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>
> >>>
> >>> N900 audio recording needs that codec provides bias voltage for integrated
> >>> digital microphone and headset microphone depending which one is used.
> >>> Digital microphone uses 2 V bias and it comes from the codec A part. Codec
> >>> B part drives the headset microphone bias and that is set to 2.5 V.
> >>>
> >>> Signed-off-by: Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>
> >>> [Jarkko: Headset mic bias changed to 2 (2.5 V) as it was before commit
> >>> e2e8bfdf6157 ("ASoC: tlv320aic3x: Convert mic bias to a supply widget")]
> >>> Signed-off-by: Jarkko Nikula <jarkko.nikula-FVTvWyuFUl3QT0dZR+AlfA@public.gmane.org>
> >>> ---
> >>>  arch/arm/boot/dts/omap3-n900.dts | 4 ++++
> >>>  1 file changed, 4 insertions(+)
> >>>
> >> Ping?
> > 
> > Oops sorry I have missed this one. This looks like a regression fix
> > for the v4.0-rc series? Should it be cc stable v3.16+ or something?
> > 
> Well, there has been regression but finding exactly how far should the
> fix go didn't look instantly straightforward due all DT, codec driver
> mic bias etc changes and I ended up not cc'ing stable.
> 
> But well, I guess first kernel where this commit makes sense is 3.16+
> due commit f7d0f2a08567 ("ARM: dts: omap3-n900: Add sound support").
> Although it applies on top of commit 14e3e295b2b9 ("ARM: dts:
> omap3-n900: Add TLV320AIC3X support") too (3.12+) but not before that.

OK I think debian is using v3.16 kernel and that's pretty much the
first kernel that is usable with dts on many omap3 devices so might
make sense for that. I can add it if you think it makes sense.

Regards,

Tony
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