playback write error (DMA or IRQ trouble?)

fish xu92576

Other Parts Discussed in Thread: TLV320AIC3104, TVP5158

Hi All,

We use tlv320aic3104 connect to mcasp0, the difference between our board and 8148 EVM is that 8148 EVM connect to the mcasp2.

The following is my change

1. sound/soc/davinci/davinci-evm.c

(1) static struct snd_soc_dai_link ti81xx_evm_dai[] = {

{

.name = "TLV320AIC3X",

.stream_name = "AIC3X",

/* .cpu_dai_name = "davinci-mcasp.2", */

.cpu_dai_name = "davinci-mcasp.0", //change

.codec_dai_name = "tlv320aic3x-hifi",

.codec_name = "tlv320aic3x-codec.1-0018",

.platform_name = "davinci-pcm-audio",

.init = evm_aic3x_init,

.ops = &evm_ops,

(2) static int __init evm_init(void)

{

......

else if (machine_is_ti8168evm() || machine_is_ti8148evm()) {

evm_snd_dev_data = &ti81xx_snd_soc_card;

/* evm_snd_dev_data_tvp5158 = &ti81xx_snd_soc_card_tvp5158; */ //change

index = 0;

}

......

2./arch/arm/mach-omap2/devices.c

void __init ti81xx_register_mcasp(int id, struct snd_platform_data *pdata)

{

/******change

ti81xx_mcasp_device.dev.platform_data = pdata;

platform_device_register(&ti81xx_mcasp_device);

ti81xx_mcasp0_device.dev.platform_data = &ti8148_evm_snd_data_tvp5158;

platform_device_register(&ti81xx_mcasp0_device);

*******/

ti81xx_mcasp0_device.dev.platform_data = pdata;

platform_device_register(&ti81xx_mcasp0_device);

}

then "run aplay -vv ldh.wav", folow is my log:

Plug PCM: Hardware PCM card 0 'TI81XX EVM' device 0 subdevice 0

Its setup is:

stream : PLAYBACK

access : RW_INTERLEAVED

format : S16_LE

subformat : STD

channels : 2

rate : 44100

exact rate : 44100 (44100/1)

msbits : 16

buffer_size : 32768

period_size : 2048

period_time : 46439

tstamp_mode : NONE

period_step : 1

avail_min : 2048

period_event : 0

start_threshold : 32768

stop_threshold : 32768

silence_threshold: 0

silence_size : 0

boundary : 1073741824

appl_ptr : 0

hw_ptr : 0

############### + | 42%

playback write error (DMA or IRQ trouble?)

aplay: pcm_write:1528: write error: Input/output error

Now I don't know where is the problem, the hope can get you help

Thank you very much

over 13 years ago

0 Vaibhav Bedia over 13 years ago

TI__Expert 5290 points

Hi,

The error message indicates that the data transfer is not happening. Please go through the porting guide http://processors.wiki.ti.com/index.php/TI81xx_PSP_Porting_Guide#Audio_driver_.28McASP.29 to double check the changes required. You are probably missing some EDMA related change.

Regards,

Vaibhav

0 fish xu92576 over 13 years ago in reply to Vaibhav Bedia

Prodigy 180 points

Hi,

Thank you for your letter!

I have reference to the web page ( http://processors.wiki.ti.com/index.php/TI81xx_PSP_Porting_Guide#Audio_driver_.28McASP.29 )for change, but still have the same error, I want to know this may be what specific problems caused by the DMA.

Regards,

fish_xu

0 Vaibhav Bedia over 13 years ago in reply to fish xu92576

TI__Expert 5290 points

Hi,

Did you change the mcasp data in the board-ti8168evm.c and devices.c to match with McASP0?

Regards.

Vaibhav

0 fish xu92576 over 13 years ago in reply to fish xu92576

Prodigy 180 points

Hi,

Thank you very much for your support

DMA error has been settled, change the new SDK, but also a question is: I found no after measurement voice signal output .

I measured the following a few pin : (tlv320aic3104: pin[27](LEFT_LOP), pin[28](LEFT_LOM), pin[29](RIGHT_LOP), pin[30](RIGHT_LOM))

0 fish xu92576 over 13 years ago in reply to fish xu92576

Prodigy 180 points

Hi,

Thank you very much for your support

Now my audio commissioning a success,But can't the sound recording documents through the aplay generated play no voice

My recording mode:

arecord -r 44100 -c 2 -f S16_LE -t raw -vv -d 50 test.raw

I want to know my recording mode has problem?

Regards!

fish_xu

0 Vaibhav Bedia over 13 years ago in reply to fish xu92576

TI__Expert 5290 points

The command looks ok. Can you probe to check the clock and data line and verify that they are toggling? Please note that the driver assumes the codec to be master.

Regards,

Vaibhav

0 fish xu92576 over 13 years ago in reply to Vaibhav Bedia

Prodigy 180 points

Hi,

Now in 8168 DEMO board for the recording, need to do the following configuration:

amixer cset name='PGA Capture Volume' 50%,50%

amixer cset numid=96 on

amixer cset numid=97 on

amixer cset numid=88 on

amixer cset numid=89 on

amixer cset numid=93 off

amixer cset numid=94 off

amixer cset numid=85 off

amixer cset numid=86 off

arecord -r 44100 -c 1 -f S16_LE -t wav -vv -d 500 ./tools/example.wav

Due to the use of 8168 DEMO board is the AIC3106 MIC3, and I use the AIC3104 MIC1, now I can only play, can't recording, I do not know to need to do in driver which changes...

0 fish xu92576 over 13 years ago in reply to Vaibhav Bedia

Prodigy 180 points

Hi,

Two days without see your reply, I hope I can see you again reply.

I want to in 8168 DEMO board with MIC1 realize recording, I tried a lot of times it didn't succeed, really need your support

Can you provide any material and some design ideas?

Regards,

fish_xu

0 Vaibhav Bedia over 13 years ago in reply to fish xu92576

TI__Expert 5290 points

Hi,

You can open the alsamixer gui and play around with the settings related to Mic1 until you have capture from Mic1 working. Once that is done, you can take a diff between the amixer dumps to figure what commands are needed.

Regards,

Vaibhav

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playback write error (DMA or IRQ trouble?)