i.MX ProcessorsのトピックRe: how to set audio path routing

how to set audio path routing

fangmingan — Mon, 27 May 2013 09:57:43 GMT

We worked on the following platform:

Android 4.0 +kernel Linux 3.0

CPU i.mx6 solo

Codec：WM8960

The situation:

Codec has been registered

Then I tested the codec using tinyplay or OMXplayer, no voice on speaker or headphone!

The attached file <control.txt> showed the status got by tinymix. And <i.mx6-5.27.log> is system log file .

If I use tinymix to set "Headphone Playback Volume " to 100 , "Right Output Mixer PCM Playback Switch " and "Left Output Mixer PCM Playback Switch" to on, then plaly wav type musci by tinyplay or OMXplayer , I can hear voice on headphone.

<asound.conf> is from the dir of source code , external/fsl_imx_omx/release.

Should I modify this file to set audio path?

But I checked the system running on i.mx6 solo board, there is not <asound.conf> in /system/etc dir.

Thanks in advance,

Fangming

Original Attachment has been moved to: control.txt.zip

Original Attachment has been moved to: i.mx6-5.27.log.zip

Original Attachment has been moved to: asound.conf.zip

Re: how to set audio path routing

fangmingan — Thu, 30 May 2013 02:46:03 GMT

Anyone can help?

Thanks and Best Regards,

Fangming

Re: how to set audio path routing

saurabh206 — Thu, 30 May 2013 04:04:23 GMT

Hi,

you can refer following files for your requirement.

kernel_imx\arch\arm\mach-mx6\board-mx6q_sabresd.c

static struct mxc_audio_platform_data wm8962_data = {

.ssi_num = 1,

.src_port = 2,

.ext_port = 3,

.hp_gpio = SABRESD_HEADPHONE_DET,

.hp_active_low = 1,

.mic_gpio = SABRESD_MICROPHONE_DET,

.mic_active_low = 1,

.init = mxc_wm8962_init,

.clock_enable = wm8962_clk_enable,

};

kernel_imx\sound\soc\codecs\wm8962.c

kernel_imx\sound\soc\imx\imx-wm8962.c

imx_hifi_hw_params()

imx_audmux_config().

Thanks,

Saurabh

Re: how to set audio path routing

fangmingan — Thu, 30 May 2013 06:31:40 GMT

Dear Saurabh，

Thank you for your attention！

Yes, We mainly modified these 3 files you mentioned. And I think the audio card has been registered successfully.

You can find the following information on log file

ALSA device list:

#0: wm8960-audio

In the file kernel_imx\sound\soc\imx\imx-wm8960.c, we changed widget and audio_map

/* imx card dapm widgets */

static const struct snd_soc_dapm_widget imx_dapm_widgets[] = {

SND_SOC_DAPM_HP("Headphone Jack", NULL),

SND_SOC_DAPM_SPK("Ext Spk_L", NULL),

SND_SOC_DAPM_SPK("Ext Spk_R", NULL),

SND_SOC_DAPM_MIC("AuxMIC", NULL),

SND_SOC_DAPM_MIC("MainMIC", NULL),

};

static const struct snd_soc_dapm_route audio_map[] = {

{ "Headphone Jack", NULL, "HP_L" },

{ "Headphone Jack", NULL, "HP_R" },

{ "Ext Spk_L", NULL, "SPK_LP" },

{ "Ext Spk_L", NULL, "SPK_LN" },

{ "Ext Spk_R", NULL, "SPK_RP" },

{ "Ext Spk_R", NULL, "SPK_RN" },

{ "MICB", NULL, "MainMIC" },

{ "LINPUT1", NULL, "MICB" },

{ "MICB", NULL, "AuxMIC" },

{ "LINPUT2", NULL, "MICB" },

};

Then in funtion imx_wm8960_init, enable speaker and main mic

static int imx_wm8960_init(struct snd_soc_pcm_runtime *rtd)

{

.....

snd_soc_dapm_enable_pin(&codec->dapm, "Ext Spk_L");

snd_soc_dapm_enable_pin(&codec->dapm, "Ext Spk_R");

snd_soc_dapm_enable_pin(&codec->dapm, "MainMIC");

......

}

But when playing whether by tinyplay or OMXPlayer, I need to mix the path by tinymix!

Why?

Re: how to set audio path routing

gavinbao — Sun, 16 Jun 2013 13:48:54 GMT

can you share you source.my code can playback ,but not capture.thanks