[PATCH V4] ASoC: Intel: boards: Use FS as nau8825 sysclk in nau88125_* machine
Radosław Biernacki
rad at semihalf.com
Thu Sep 10 19:25:33 CEST 2020
Thank you Pierre.
Sending V6.
czw., 10 wrz 2020 o 17:58 Pierre-Louis Bossart
<pierre-louis.bossart at linux.intel.com> napisał(a):
>
> almost there, only couple of typos below. The comments are really good now!
>
> > +static int skylake_nau8825_trigger(struct snd_pcm_substream *substream, int cmd)
> > {
> > struct snd_soc_pcm_runtime *rtd = substream->private_data;
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
> > - int ret;
> > -
> > - ret = snd_soc_dai_set_sysclk(codec_dai,
> > - NAU8825_CLK_MCLK, 24000000, SND_SOC_CLOCK_IN);
> > -
> > - if (ret < 0)
> > - dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n", ret);
> > + int ret = 0;
> > +
> > + switch (cmd) {
> > + case SNDRV_PCM_TRIGGER_START:
> > + /* Since 256xFS clocks cannot be generated by SKL, the NAU8825
> > + * is configured to re-generate its system clock from the BCLK
> > + * using the FLL.
> > + * We must switch system clock (FLL to use BCLK) here as it is
> > + * not given eariler by FW (like in hw_param). We let nau8825 to
>
> typo: earlier
>
> > + * use internal VCO clock till now which reduces the audiable
>
> type: audible
>
> > + * pop's. */
> > +
> > + /* fall through */
>
> I don't think it's required if there's no code?
>
> > +
> > + case SNDRV_PCM_TRIGGER_RESUME:
> > + /* Once device resumes, the system will only enable power
> > + * sequence for playback without doing hardware parameter, audio
> > + * format, and PLL configure. In the mean time, the jack
> > + * detecion sequence has changed PLL parameters and switched to
>
> typo: detection
>
> > + * internal clock. Thus, the playback signal distorted without
> > + * correct PLL parameters. Therefore we need to configure PLL
> > + * again */
> > + ret = snd_soc_dai_set_sysclk(codec_dai, NAU8825_CLK_FLL_FS, 0,
> > + SND_SOC_CLOCK_IN);
> > + if (ret < 0) {
> > + dev_err(codec_dai->dev, "can't set FS clock %d\n", ret);
> > + break;
> > + }
> > + ret = snd_soc_dai_set_pll(codec_dai, 0, 0, runtime->rate,
> > + runtime->rate * 256);
> > + if (ret < 0)
> > + dev_err(codec_dai->dev, "can't set FLL: %d\n", ret);
> > + break;
> > + }
>
> same comments for the other machine driver.
> >
> > return ret;
> > }
> >
> > -static const struct snd_soc_ops skylake_nau8825_ops = {
> > - .hw_params = skylake_nau8825_hw_params,
> > +static struct snd_soc_ops skylake_nau8825_ops = {
> > + .trigger = skylake_nau8825_trigger,
> > };
> >
> > static int skylake_dmic_fixup(struct snd_soc_pcm_runtime *rtd,
> > diff --git a/sound/soc/intel/boards/skl_nau88l25_ssm4567.c b/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
> > index 4b317bcf6ea0..d076f19f9b78 100644
> > --- a/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
> > +++ b/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
> > @@ -12,6 +12,7 @@
> >
> > #include <linux/module.h>
> > #include <linux/platform_device.h>
> > +#include <linux/delay.h>
> > #include <sound/core.h>
> > #include <sound/pcm.h>
> > #include <sound/soc.h>
> > @@ -57,12 +58,12 @@ static const struct snd_kcontrol_new skylake_controls[] = {
> > };
> >
> > static int platform_clock_control(struct snd_soc_dapm_widget *w,
> > - struct snd_kcontrol *k, int event)
> > + struct snd_kcontrol *k, int event)
> > {
> > struct snd_soc_dapm_context *dapm = w->dapm;
> > struct snd_soc_card *card = dapm->card;
> > struct snd_soc_dai *codec_dai;
> > - int ret;
> > + int ret = 0;
> >
> > codec_dai = snd_soc_card_get_codec_dai(card, SKL_NUVOTON_CODEC_DAI);
> > if (!codec_dai) {
> > @@ -70,14 +71,7 @@ static int platform_clock_control(struct snd_soc_dapm_widget *w,
> > return -EIO;
> > }
> >
> > - if (SND_SOC_DAPM_EVENT_ON(event)) {
> > - ret = snd_soc_dai_set_sysclk(codec_dai,
> > - NAU8825_CLK_MCLK, 24000000, SND_SOC_CLOCK_IN);
> > - if (ret < 0) {
> > - dev_err(card->dev, "set sysclk err = %d\n", ret);
> > - return -EIO;
> > - }
> > - } else {
> > + if (!SND_SOC_DAPM_EVENT_ON(event)) {
> > ret = snd_soc_dai_set_sysclk(codec_dai,
> > NAU8825_CLK_INTERNAL, 0, SND_SOC_CLOCK_IN);
> > if (ret < 0) {
> > @@ -85,6 +79,7 @@ static int platform_clock_control(struct snd_soc_dapm_widget *w,
> > return -EIO;
> > }
> > }
> > +
> > return ret;
> > }
> >
> > @@ -344,24 +339,51 @@ static int skylake_dmic_fixup(struct snd_soc_pcm_runtime *rtd,
> > return 0;
> > }
> >
> > -static int skylake_nau8825_hw_params(struct snd_pcm_substream *substream,
> > - struct snd_pcm_hw_params *params)
> > +static int skylake_nau8825_trigger(struct snd_pcm_substream *substream, int cmd)
> > {
> > struct snd_soc_pcm_runtime *rtd = substream->private_data;
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
> > - int ret;
> > -
> > - ret = snd_soc_dai_set_sysclk(codec_dai,
> > - NAU8825_CLK_MCLK, 24000000, SND_SOC_CLOCK_IN);
> > -
> > - if (ret < 0)
> > - dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n", ret);
> > + int ret = 0;
> > +
> > + switch (cmd) {
> > + case SNDRV_PCM_TRIGGER_START:
> > + /* Since 256xFS clocks cannot be generated by SKL, the NAU8825
> > + * is configured to re-generate its system clock from the BCLK
> > + * using the FLL.
> > + * We must switch system clock (FLL to use BCLK) here as it is
> > + * not given eariler by FW (like in hw_param). We let nau8825 to
> > + * use internal VCO clock till now which reduces the audiable
> > + * pop's. */
> > +
> > + /* fall through */
> > +
> > + case SNDRV_PCM_TRIGGER_RESUME:
> > + /* Once device resumes, the system will only enable power
> > + * sequence for playback without doing hardware parameter, audio
> > + * format, and PLL configure. In the mean time, the jack
> > + * detecion sequence has changed PLL parameters and switched to
> > + * internal clock. Thus, the playback signal distorted without
> > + * correct PLL parameters. Therefore we need to configure PLL
> > + * again */
> > + ret = snd_soc_dai_set_sysclk(codec_dai, NAU8825_CLK_FLL_FS, 0,
> > + SND_SOC_CLOCK_IN);
> > + if (ret < 0) {
> > + dev_err(codec_dai->dev, "can't set FS clock %d\n", ret);
> > + break;
> > + }
> > + ret = snd_soc_dai_set_pll(codec_dai, 0, 0, runtime->rate,
> > + runtime->rate * 256);
> > + if (ret < 0)
> > + dev_err(codec_dai->dev, "can't set FLL: %d\n", ret);
> > + break;
> > + }
> >
> > return ret;
> > }
> >
> > -static const struct snd_soc_ops skylake_nau8825_ops = {
> > - .hw_params = skylake_nau8825_hw_params,
> > +static struct snd_soc_ops skylake_nau8825_ops = {
> > + .trigger = skylake_nau8825_trigger,
> > };
> >
> > static const unsigned int channels_dmic[] = {
> > @@ -582,6 +604,7 @@ static struct snd_soc_dai_link skylake_dais[] = {
> > .init = skylake_ssm4567_codec_init,
> > .ignore_pmdown_time = 1,
> > .be_hw_params_fixup = skylake_ssp_fixup,
> > + .ops = &skylake_nau8825_ops,
> > .dpcm_playback = 1,
> > .dpcm_capture = 1,
> > SND_SOC_DAILINK_REG(ssp0_pin, ssp0_codec, platform),
> >
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