Messages in this thread Patch in this message | | | From | Arun Bharadwaj <> | Subject | [PATCH 1/3] ARM: dts: Correct audio input route & set mic bias | Date | Thu, 4 Jun 2015 11:08:17 -0700 |
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From: Adam YH Lee <adam.yh.lee@gmail.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@gmail.com> --- 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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