TLV320AIC3101: Linux amixer settings for HP outputs

Pero Krivic

Part Number: TLV320AIC3101
Other Parts Discussed in Thread: TLV320AIC3104, , TPS65217

Hello,

I have designed a custom board with the TLV320AIC3101. The board serves as an add-on board for a PocketBeagle single board computer, based on TI's AM335x SoC. The board I made is 90% based on a so called Audio Cape that utilizes TLV320AIC3104 chip for audio inouts. My sound speakers are connected to the HPLOUT and HPROUT pins, driven single-ended.

The board bring-up turned out well, I used existing Linux drivers as well as the device tree overlay, and the codec got recognized. That is, the boot log shows no errors, and the aplay -l prints it as a default sound card. This indicates that the I2C interface is fine. The other command, aplay sound_sample.wav exits after the sound is played, what gives me the reason to believe that clocks, ie I2S is also working fine.

However, I don't get any sound at the outputs. I tried to play with the amixer to find the right settings.

Now, looking at the block diagram of the codec, I am trying to figure out what settings get the outputs right. With a simple controls listed using amixer scontrols, I am thinking like follows:

* 'HP' is on, so that the HP outputs are turned on
* 'HP DAC', that is DAC volume control is turned on to max
* 'Left DAC Mux' is set to DAC_L2, since I want the sound directly from the DAC, no mixing with other channels
* 'Right DAC Mux' is DAC_R2, same reason as above
* 'Left HP Power Down mode' is set to high impedance as well as the 'Right HP Power Down mode'

I cant think of the other settings that would be relevant in this application. However, the sound doesn't play. Any suggestions would be very helpful.

Best regards

over 3 years ago

0 Shenghao Ding over 3 years ago

TI__Genius 11510 points

I wonder which chip you have used and met no sound issue, TLV320AIC3101 or TLV320AIC3104?

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

hello, I used x101.

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

Share the DTS setting, amixer list, the code with me. Thanks.

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

There you go:

tlv320aic_dts_amixer.zip

In there is a dts file im using in my overlay, as well as simple and full content list of the amixer. I havent touched any other code, so the drivers should be standard kernel ones.

Best regards

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

Oh and by the way, I looked under the scope all the clock and data signals. This is the capture of a measurement, from top to bottom: MCLK, WCLK, BCLK, and DOUT. I noticed a couple of things:

1. Sampling frequency (WCLK) is 44.1 kHz, eventhough aplay says it should be 48 kHz

2. There is no data coming out during the high-period of the WCLK. In the datasheet it says that for the I2S the data in this time period should be for left ot right stereo output.

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

How do you use the aplay command, tell me in detail, and share your wav file? I'll also check the audio format of the wav file you used.

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

this is the sample file I'm using like this:

aplay windows.wav

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

The audio format of the wave file you share with me is

Kindly use following wav file:

/cfs-file/__key/communityserver-discussions-components-files/6/Shakira-_2D00_-Try-Everything.7z

The audio format is:

aplay above wave file and share the dmsg log with me, I will check whether aic31xx_hw_params is called, this api is used to set sample rate, etc.

One more thing, before playback run "amixer controls", during playback run "amixer controls". Share them with me, too.

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

Thanks for the advice. Here you go, all the outputs you asked for.

playback.zip

The interesting part of the dmesg is this one (the rest of it is in the zip file):

debian@beaglebone:~$ dmesg | tail
[   57.040596] remoteproc remoteproc1: 4a334000.pru is available
[   57.040763] pru-rproc 4a334000.pru: PRU rproc node pru@4a334000 probed successfully
[   57.048465] remoteproc remoteproc2: 4a338000.pru is available
[   57.048645] pru-rproc 4a338000.pru: PRU rproc node pru@4a338000 probed successfully
[  502.166246] davinci-mcasp 48038000.mcasp: Sample-rate is off by 400 PPM
[  534.328331] davinci-mcasp 48038000.mcasp: Sample-rate is off by 400 PPM
[  563.897892] davinci-mcasp 48038000.mcasp: Sample-rate is off by 400 PPM
[  790.217617] davinci-mcasp 48038000.mcasp: Sample-rate is off by 400 PPM
[ 1021.624168] davinci-mcasp 48038000.mcasp: Sample-rate is off by 400 PPM
[ 1186.493848] davinci-mcasp 48038000.mcasp: Sample-rate is off by 400 PPM

so it shows an error of being in the offset with the sample rate by 400ppm. Is that okay?

amixer control options seems to be the same, during and before the playback.

In the other news, this time I was able to hear some sound coming out of my speakers. The sound was extremely weak and drowned in noise, but I could definitely distinguish it.

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

For "mcasp: Sample-rate is off by 400 PP"

Kindly see if the below e2e thread will be in help:

Linux/PROCESSOR-SDK-AM335X: McASP Master mode configuration - Processors forum - Processors - TI E2E support forums

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

ok, but why is the sound weak and noisy? Is everything all right with my dts files that you have checked? Is everything fine with amixer settings?

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

Kindly run "cat /sys/kernel/debug/asoc/codecs" and "cat /proc/asound/pcm" first.
As to "amixer controls", I made a mistake. we may as well run "amixer contents" instead of "amixer controls" before and during playback.
kindly dump the Page 0 registers before and during playback.
commands like following:
i2cset -y -f 2 0x18 0x0 0x0
i2cdump -y -f 2 0x18

Share above logs with me

The runtime log you shared with me last time tell me that avdd and dvdd are incorrect in function aic31xx_configure_ocmv
[ 1.142918] tlv320aic3x-codec 2-0018: Invalid supply voltage(s) AVDD: -22, DVDD: -22

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

Hello, I have to tell you that I got the thing working, at least on my headphones. On headphones, the sound is crisp clear, and amixer settings are easy to understand. On the amplifier, however, the sound is still crap (the high-impendance input preamp). Any reason why it may be so?

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

I want you to get the status registers to check the root cause. Then according to the i2s signal waveform plot from the scope. Since the bitstream is stereo, I wiill check why there is only data in only one channel, while none in the other channel. Please check aic3x_hw_params, what does the sample rate and width. Thanks.

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

Ok, thanks for the explanation.

There is no "/sys/kernel/debug/asoc/codecs" in my system, but there is "/sys/kernel/debug/asoc/components", that returns:

48038000.mcasp
48038000.mcasp
tlv320aic3x-codec.2-0018
snd-soc-dummy
snd-soc-dummy

And "cat /proc/asound/pcm" returns:

00-00: davinci-mcasp.0-tlv320aic3x-hifi tlv320aic3x-hifi-0 : davinci-mcasp.0-tlv320aic3x-hifi tlv320aic3x-hifi-0 : playback 1 : capture 1

Amixer contents is presented here:

amixer_contents.tar.gz

Shenghao Ding said:
kindly dump the Page 0 registers before and during playback.

Unfortunately, I can not get the I2C output, since the driver is in use, and I get the error message:

"Error: Could not set address to 0x18: Device or resource busy"

Shenghao Ding said:
The runtime log you shared with me last time tell me that avdd and dvdd are incorrect in function aic31xx_configure_ocmv

There is an explanation for this. In PocketBeagle, that I am using, the power manager chip TPS65217 has these by default turned off eventhough, I am using them on the board from the other regulator. So the hardware works, but the device tree is not completely configured

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

Shenghao Ding said:
Please check aic3x_hw_params, what does the sample rate and width.

How can I check this?

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

Add log into aic3x_hw_params,.

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

Thanks for the log. Kindly help the I2C register dump, as you know, i2cdump is the system standard tool, it accesses the /de/i2c-2 driver node rather than the codec driver. According to the log your shared, I think it seemed a clk issue. Strongly suggest to dump the registers. Thanks.

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

I get the error "Error: Could not set address to 0x18: Device or resource busy".

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

Shenghao Ding said:
According to the log your shared, I think it seemed a clk issue.

What part of the log makes you think it is the clk issue?

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

davinci-mcasp 48038000.mcasp: Sample-rate is off by 400 PPM

Kindly share register dump, there're some status registers which can help further analysis.

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

Thanks for the explanation. I have figured that I can dump the I2C content if I add -f flag. Here are the dump files:

i2cdump.tar.gz

I have additionally checked the audio outputs with the scope and realized that there is no signal on one of the channels, not even directly at the IC pins. This corresponds to what we have seen on I2S scope measurements - codec indeed outputs only one channel.

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

Hi Pero

We may as well have a conf-call, and you can share your screen with me, I can add some logs into your code. Don't forget to prepare the scope.

In my view, it is most probably a clk issue. My mail is shenghao-ding@ti.com.

Thanks

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

okay, thanks for your enthusiasm to help me out. I can try to arrange it, but not I'm sure if I will be successful.

What do you think needs to be added? Drivers, DTS, or something third?

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

before playback, kindly dump the register and amixer

During playback, kindly dump the register and amixer again. I will compare them

0 Pero Krivic over 3 years ago in reply to Shenghao Ding

Prodigy 40 points

Hello, I did that in my previous post:

Pero Krivic said:
Thanks for the explanation. I have figured that I can dump the I2C content if I add -f flag. Here are the dump files:

Is it any helpful?

0 Shenghao Ding over 3 years ago in reply to Pero Krivic

TI__Genius 11510 points

Hi Pero

Since aic3101 is used in this project, however I found following definition in PB-I2C2-TLV320AIC3104.dts

tlv320aic3104: tlv320aic3104@18 {
#sound-dai-cells = <0>;
compatible = "ti,tlv320aic3104";
reg = <0x18>;
gpio-reset = <&gpio3 20 0>;
};

You may as well use tlv320aic3x.c as tlv32aic3101 driver code, pls modify to following setting

compatible = "ti,tlv320aic3x";

One of our documents mentioned the correct setting for device tree

tlv320aic3x.txt « sound « bindings « devicetree « Documentation - kernel/git/stable/linux.git - Linux kernel stable tree

- compatible - "string" - One of:
    "ti,tlv320aic3x" - Generic TLV320AIC3x device
    "ti,tlv320aic33" - TLV320AIC33
    "ti,tlv320aic3007" - TLV320AIC3007
    "ti,tlv320aic3106" - TLV320AIC3106
    "ti,tlv320aic3104" - TLV320AIC3104

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TLV320AIC3101: Linux amixer settings for HP outputs