On Thursday 29 January 2015 21:42:18 Pavel Machek wrote:

Hi!

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I did this:

I'm not sure which one is "main" microphone and which is
headset, but I guess 2V should be "close enough" to 2.5V
to produce something different from zeros..?

Main or integrated is digital microphone which does AD
conversion itself and headset is analogue. If DMIC is
without bias codec will sample plain zeros from DMIC
input but analogue input should always produce some
random LSB bits from codec's AD converter.

If codec produces zeros also from analogue input then I
suppose codec ADC is not powered up or similar. One way
to hunt regression if bisecting is not possible due
reason or another is to dump and diff codec registers
from /sys/kernel/debug/regmap/ using both working commit

and head.

I tried 2.6.28... where recording was, but it does not support
regmap. Then I tried 3.14, but could not get recording to work
there.

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 	tlv320aic3x_aux: tlv320aic3x at 19 {

@@ -502,6 +504,8 @@

 		DRVDD-supply = <&vmmc2>;
 		IOVDD-supply = <&vio>;
 		DVDD-supply = <&vio>;

+
+		ai3x-micbias-vg = <1>;

 	};

This should be 2, i.e. 2.5 V according to
Documentation/devicetree/bindings/sound/tlv320aic3x.txt. I
think 2 V is too low for some headset mics and that was
the reason for 2.5 V.

Ok, tried that, but no change.

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Can you also try this patch to correct the DAPM route for the 

rx51:

Yes, with the patch below (and dts updates I did) recording
works.

Another interesting note is that audio quality is not that
horrible when playing 8 kHz, mono signal... it is mostly what
I'd expect. Playing 44.1kHz, stereo mp3 .. is not good.

Tested-by: Pavel Machek <redacted>

Thanks,
									Pavel

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diff --git a/sound/soc/omap/rx51.c b/sound/soc/omap/rx51.c
index 04896d6252a2..7f299357c2d2 100644
--- a/sound/soc/omap/rx51.c
+++ b/sound/soc/omap/rx51.c

@@ -250,14 +250,14 @@ static const struct snd_soc_dapm_route

audio_map[] = {

 	{"FM Transmitter", NULL, "LLOUT"},
 	{"FM Transmitter", NULL, "RLOUT"},

-	{"DMic Rate 64", NULL, "Mic Bias"},
-	{"Mic Bias", NULL, "DMic"},
+	{"DMic Rate 64", NULL, "DMic"},
+	{"DMic", NULL, "Mic Bias"},

 	{"b LINE2R", NULL, "MONO_LOUT"},
 	{"Earphone", NULL, "b HPLOUT"},

-	{"LINE1L", NULL, "b Mic Bias"},
-	{"b Mic Bias", NULL, "HS Mic"}
+	{"LINE1L", NULL, "HS Mic"},
+	{"HS Mic", NULL, "b Mic Bias"},

 };
 
 static const char * const spk_function[] = {"Off", "On"};

Can you try DT and non-DT boot of 3.19? If there is difference?

-- 
Pali Roh?r
pali.rohar at gmail.com
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