[8168]howto use alsa sound

Hi Marc,

I also meet the same problem,

i using dm8168 evm+vs board, dvrrdk 2.80 ,

and i run the audio demo ,

snd device can not be found ,

##### MY ENV #####

/dev # ls -al /dev/snd/* 

nothing is found then,

then i see the print information when linux kernel starts,about ALSA

ALSA device list:

no alsa device found 

i see the kernel menuconfigue , i have include the alsa soc option 

Is there any other work have to do for using audio tvp5158 or aix30 on evm board?

best regards

xavier

This means that some device registration failed or device listing not present in kernel code. You could refer to later dvr_rdk releases and compare these files for any missing configuration.

             - kernel/arch/arm/mach-omap2/board_ti81xxxxx.c

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

              -kernel/sound/soc/davinci/*

There are patches on top of 2.80 release for audio issues with DM8168 EVM. Please contact your local FAE.

Hi, Sivagamy Govindasamy

you are right !

it is a bug in dvrrdk 2.80, finally i find the problem.

As for evm board tvp5158 audio is undefineed in dvrrdk 2.80 ,

however in /source/soc/ti81xx_evm.c

static struct snd_soc_dai_link ti81xx_mcasp_dai[] = {
    {
        .name = "TVP5158AUDIO",
        .stream_name = "TVP-PCM",
        .cpu_dai_name= "davinci-mcasp.0",
        .codec_dai_name = "tvp5158-hifi",
        .platform_name ="davinci-pcm-audio",
        .codec_name = "tvp5158-audio",
        .ops = &ti81xx_evm_ops,
    },
    {
        .name = "TLV320AIC3X",
        .stream_name = "AIC3X",
        .cpu_dai_name= "davinci-mcasp.2",
        .codec_dai_name = "tlv320aic3x-hifi",
        .codec_name = "tlv320aic3x-codec.1-0018",
        .platform_name = "davinci-pcm-audio",
        .init = ti81xx_evm_aic3x_init,
        .ops = &ti81xx_evm_ops,
    },
#ifdef CONFIG_SND_SOC_TI81XX_HDMI
    {
        .name = "HDMI_SOC_LINK",
        .stream_name = "hdmi",
        .cpu_dai_name = "hdmi-dai",
        .platform_name = "davinci-pcm-audio",
        .codec_dai_name = "HDMI-DAI-CODEC",     /* DAI name */
        .codec_name = "hdmi-dummy-codec",
    },
#endif    
};

tvp5158 is added,

then  in /sound/soc/soc_core.c function snd_soc_instantiate_card,

snd_soc_instantiate_card

{

    /* bind DAIs */
    for (i = 0; i < card->num_links; i++)
        soc_bind_dai_link(card, i);

    /* bind completed ? */
    if (card->num_rtd != card->num_links) {
        mutex_unlock(&card->mutex);
        return;
    }
}

card->num_rtd != card->num_links  function return as card->num_links = 3 ,card->num_rtd=2

then ASLA device create failure !!!

Actually in dvrrdk 3.0 i see the bug has corrected,  but i does not find any issues about this fixed?

Issues Fixed in 3.0 is not so clearly comparing with 2.800

best regards

xavier

We posted the fixes for 2.80, probably that's the reason it was not documented correctly in 3.0 GA release. We will take care of this in next releases.

Are you able to get audio working now?

Yes ，audio works now，thank you for evm  board

hii,

in dvr_rdk 3.0 audio is getting stop during playback after sometimes can anybody tell me what is the issue