linux-kernel - Re: [PATCH 1/3] ARM: dts: Correct audio input route & set mic bias

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Message-ID: <20150714065745.GE17550@atomide.com>
Date:	Mon, 13 Jul 2015 23:57:45 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Arun Bharadwaj <arun@...stix.com>
Cc:	Benoît Cousson <bcousson@...libre.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	linux-omap@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Adam YH Lee <adam.yh.lee@...il.com>,
	Ash Charles <ashcharles@...il.com>
Subject: Re: [PATCH 1/3] ARM: dts: Correct audio input route & set mic bias

* Arun Bharadwaj <arun@...stix.com> [150604 11:10]:
> From: Adam YH Lee <adam.yh.lee@...il.com>
> 
> Audio-in was incorrectly routed to Line In. It should be Mic3L as per
> schematic.
> 
> Using mic-bias voltage at 2.0v (<0x1>) does not work for some reason. There
> is no voltage seen on micbias (R127). Mic-bias voltage of 2.5v (<0x2>) works.
> I see voltage of 2.475v across GND and micbias.
> 
> With these changes, I can record audio with a pair of proliferate TRRS earbuds.
> 
> Signed-off-by: Ash Charles <ashcharles@...il.com>

Can you please repost this with after checking From
and Signed-off-by?

Regards,

Tony

> ---
>  arch/arm/boot/dts/am335x-pepper.dts | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/am335x-pepper.dts b/arch/arm/boot/dts/am335x-pepper.dts
> index 0d35ab6..473d8ee 100644
> --- a/arch/arm/boot/dts/am335x-pepper.dts
> +++ b/arch/arm/boot/dts/am335x-pepper.dts
> @@ -74,6 +74,7 @@
>  	audio_codec: tlv320aic3106@1b {
>  		compatible = "ti,tlv320aic3106";
>  		reg = <0x1b>;
> +		ai3x-micbias-vg = <0x2>;
>  	};
>  
>  	accel: lis331dlh@1d {
> @@ -153,7 +154,7 @@
>  	ti,audio-routing =
>  		"Headphone Jack",	"HPLOUT",
>  		"Headphone Jack",	"HPROUT",
> -		"LINE1L",		"Line In";
> +		"MIC3L",		"Mic3L Switch";
>  };
>  
>  &mcasp0 {
> -- 
> 2.1.4
> 
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