i.MX ProcessorsのトピックRe: imx6 - tlv320aic32x4 codec no data on I2S port

imx6 - tlv320aic32x4 codec no data on I2S port

benoitmoffet — Thu, 19 Nov 2015 21:16:33 GMT

Hi,

I am working on a custom board with an imx6d processor and a tlv320aic3204 codec.

The codec is connected on the AUD4 port and the mclk comes from GPIO0 at 24MHz.

The codec is detected and the ssi maping seems fine.

imx-aic32x4 sound.18: tlv320aic32x4-hifi <-> 202c000.ssi mapping ok

ALSA device list:

#0: tlv320aic32x4

Here is my device tree entry for the sound card:

sound {

compatible = "fsl,imx-audio-aic32x4";

model = "tlv320aic32x4";

audio-codec = <&codec>;

ssi-controller = <&ssi1>;

audio-routing =

"Line Out Jack", "LOL",

"Line Out Jack, "LOR",

"Headphone Jack, "HPL",

"Headphone Jack, "HPR";

mux-ext-port = <4>;

mux-int-port = <1>;

};

&ssi1 {

status = "okay";

};

... --- ...

codec: tlv320aic32x4@18 {

compatible = "ti,tlv320aic32x4";

reg = <0x18>;

clocks = <&clks 201>;

clock-names = "mclk";

gpio-reset = <&gpio5 12 0>;

status = "okay";

};

When I play with alsamixer, I can see I2C data on the port with the scope.

I don't see data on the AUD4 pins, only the Mclk is always present.

If I use aplay, I get this message after 13s waiting:

aplay: pcm_write:1947: write error: Input/output error

I wrote a machine driver for the tlv320aic32x4 based on the sgtl5000 one...

I use the 3.10.17 kernel on poky-dizzy and the meta-fsl-arm layer in dizzy too.

Regards,

Re: imx6 - tlv320aic32x4 codec no data on I2S port

igorpadykov — Fri, 20 Nov 2015 08:45:20 GMT

Hi Benoit

one can look at linux-imx_3.10.17_1.0.2_ga-imx-tlv320aic23.patch

How to enable TLV320 on IMX6Q?

Best regards

igor

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Re: imx6 - tlv320aic32x4 codec no data on I2S port

benoitmoffet — Fri, 20 Nov 2015 15:29:40 GMT

Hi Igor,

Thank you very much for your answer

I already have looked at it and it's seems that what I have done so far matches those information.

There is something missing, probably something obvious...

All drivers are loaded, the codec one, the platform one (fsl_ssi) and the machine one (imx-aic32x4) but no data on the I2S port.

Regards,

Re: imx6 - tlv320aic32x4 codec no data on I2S port

benoitmoffet — Wed, 25 Nov 2015 19:16:58 GMT

Hi,

To add details to the problem, I put traces in the fsl_ssi driver. I can see that each time I call an aplay or a speaker test the stream is created and the transfer is started. But there is no activity of sdma and ssi in /proc/interrupt...

I am very close... but there is something important missing.

Regards,

Re: imx6 - tlv320aic32x4 codec no data on I2S port

benoitmoffet — Wed, 02 Dec 2015 16:11:49 GMT

I finally managed to fix the issue. Since the driver now supports device tree, a parameter was kept uninitialized... pwr_config.

Just setting pwr_config with a good value solved the issue.

Re: imx6 - tlv320aic32x4 codec no data on I2S port

kesaco — Mon, 29 Feb 2016 13:11:01 GMT

Hi Benoit,

I face a similar issue with another SoM, but I did not found any "pwr_config" parameter in any driver.

Where does this property come from ?

What does it represent and what value do you use ?

Thank you,

Miquel

Re: imx6 - tlv320aic32x4 codec no data on I2S port

benoitmoffet — Mon, 29 Feb 2016 13:22:18 GMT

Hi Miquel,

It comes from the tlv320aic32x4.c driver. Under the parse_dt function. I

have a patched version of the driver that use device tree, so it is maybe

why you did not see that parameter.

aic32x4->power_cfg

In fact you just have to be sure that your driver enables the internal LDO

of the codec.

snd_soc_write(codec, AIC32X4_LDOCTL, AIC32X4_LDOCTLEN);

Best regards,

Benoit

2016-02-29 8:11 GMT-05:00 kesaco <admin@community.freescale.com>:

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Re: imx6 - tlv320aic32x4 codec no data on I2S port

linzhang — Fri, 30 Sep 2016 08:36:38 GMT

Hi, Benoit

can you give me a copy of this driver(for tlv320aic32x4)?