On 03/30/2015 07:42 PM, Tony Lindgren wrote:
> * Jarkko Nikula <jarkko.nikula@xxxxxxxxxx> [150330 09:31]:
>> On 03/01/2015 09:07 PM, Jarkko Nikula wrote:
>>> From: Pavel Machek <pavel@xxxxxx>
>>>
>>> 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@xxxxxx>
>>> [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@xxxxxxxxxx>
>>> ---
>>> 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.
--
Jarkko
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