Linux/AM3358: Question about use internal clock for McASP with TISDK5.0.0.15

Sorry, I have missed changes on davinci-evm.c

#include <sound/pcm_params.h>

static unsigned int evm_get_bclk(struct snd_pcm_hw_params *params)
{
        int sample_size = snd_pcm_format_width(params_format(params));
        int rate = params_rate(params);
        int channels = params_channels(params);

        return sample_size * channels * rate;
}

static int pcm5102a_hw_params(struct snd_pcm_substream *substream,
                                 struct snd_pcm_hw_params *params)
{
        struct snd_soc_pcm_runtime *rtd = substream->private_data;
        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
        struct snd_soc_codec *codec = rtd->codec;
        struct snd_soc_card *soc_card = rtd->card;
        struct platform_device *pdev = to_platform_device(soc_card->dev);
        unsigned int bclk_freq = evm_get_bclk(params);
        unsigned sysclk = ((struct snd_soc_card_drvdata_davinci *)
                           snd_soc_card_get_drvdata(soc_card))->sysclk;
        int ret;

        ret = snd_soc_dai_set_clkdiv(cpu_dai, 1, sysclk/bclk_freq);
        if (ret < 0) {
                dev_err(&pdev->dev, "can't set CPU DAI clock divider %d\n",
                        ret);
                return ret;
        }

        printk(KERN_ERR "@@@ PCM5102a hw params\n");
        printk(KERN_ERR "@@@ sysclk=%d\n", sysclk);
        printk(KERN_ERR "@@@bclk_freq=%d\n", bclk_freq);
        ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
        if (ret < 0)
                return ret;

        return ret;
}

...

static struct snd_soc_ops pcm5102a_ops = {
        .startup = evm_startup,
        .shutdown = evm_shutdown,
        .hw_params = pcm5102a_hw_params,
};

static struct snd_soc_dai_link evm_dai_pcm5102a = {
        .name           = "PCM5102A",
        .stream_name    = "Playback",
        .codec_dai_name = "pcm5102a-hifi",
        .ops            = &pcm5102a_ops,
        .dai_fmt        = (SND_SOC_DAIFMT_CBS_CFS | SND_SOC_DAIFMT_I2S |
                           SND_SOC_DAIFMT_IB_NF),
};

...

static const struct of_device_id davinci_evm_dt_ids[] = {
        {
                .compatible = "ti,pcm5102a-evm-audio",
                .data = &evm_dai_pcm5102a,
        },
...

Hi, Pavel.

I have checked examples from your solution.

Firstly, BCLK and FSYNC is not generated when I apply "sprac97.pdf".

So, I try to "Sitara Linux Audio DAC Example", there is no entries "simple-audio-card,bitclock-master, simple-audio-card,frame-master", anyway BCLK and FSYNC is generated but I think frequency is wrong.

Clock source of mcasp0 is "mcasp0_fck", it defined by dts like below:

        sound {
                compatible = "ti,pcm5102a-evm-audio";
                ti,model = "TI PCM5102A";
                ti,audio-codec = <&pcm5102a>;
                ti,mcasp-controller = <&mcasp0>;
                ti,codec-clock-rate = <2560000>;

                sound1_master: simple-audio-card,cpu {
                        sound-dai = <&mcasp0>;
                        clocks = <&mcasp0_fck>;
                        /* clocks = <&clk_mcasp0>; */
                };

                simple-audio-card,codec {
                        sound-dai = <&pcm5102a>;
                };
        };

And related register information is like below:

AFSXCTL     is 0x00000113
ACLKXCTL   is 0x00180033
AHCLKXCTL is 0x00188000
PFUNC         is 0x00000000
PDIR             is 0xBC000004

Finally, I played 8kHz rate/mono channel/16 bit per sample, I expect 128kHz BCLK and 8kHz FSYNC, but clock is something is wrong.  Please see below capture: (Signal #1 is BCLK, #2 is FSYNC)

I have checked ALSA hwparams like below:

access: RW_INTERLEAVED
format: S16_LE
subformat: STD
channels: 1
rate: 8000 (8000/1)
period_size: 1000
buffer_size: 4000

I think configuration is no problem, could I get advice about this issue?

Thanks,

Roy.