Since 256xFS clocks cannot be generated by SKL, the NAU8825 is
configured to re-generate its system clock from the BCLK using the
FLL. The link is configured to use a 48kHz frame rate, and 24 bits in
25-bit slot. The SSP configuration is extracted from NHLT settings and
not dynamically changed. Listening tests and measurements do not show
any distortion or issues
Signed-off-by: John Hsu <[email protected]>
Signed-off-by: Yong Zhi <[email protected]>
Signed-off-by: Mac Chiang <[email protected]>
Signed-off-by: Ben Zhang <[email protected]>
Signed-off-by: Radoslaw Biernacki <[email protected]>
---
Notes:
v1 -> v2:
- adding same changes to skl_nau88l25_max98357a.c
v2 -> v3:
- removing msleep() in SNDRV_PCM_TRIGGER_RESUME as it unnecessarily increase
playback/capture latency while actually FLL does not require it.
- simplifing commit message
.../soc/intel/boards/skl_nau88l25_max98357a.c | 71 +++++++++++++-----
sound/soc/intel/boards/skl_nau88l25_ssm4567.c | 72 ++++++++++++++-----
2 files changed, 105 insertions(+), 38 deletions(-)
diff --git a/sound/soc/intel/boards/skl_nau88l25_max98357a.c b/sound/soc/intel/boards/skl_nau88l25_max98357a.c
index d7b8154c43a4..75976aad0366 100644
--- a/sound/soc/intel/boards/skl_nau88l25_max98357a.c
+++ b/sound/soc/intel/boards/skl_nau88l25_max98357a.c
@@ -8,6 +8,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/delay.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
@@ -47,7 +48,7 @@ enum {
};
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;
@@ -60,14 +61,7 @@ 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) {
@@ -292,24 +286,39 @@ static const struct snd_soc_ops skylake_nau8825_fe_ops = {
.startup = skl_fe_startup,
};
-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);
+ int ret = 0;
- if (ret < 0)
- dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n", ret);
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ 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;
+ case SNDRV_PCM_TRIGGER_RESUME:
+ 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 int skylake_dmic_fixup(struct snd_soc_pcm_runtime *rtd,
@@ -630,10 +639,34 @@ static int skylake_card_late_probe(struct snd_soc_card *card)
return hdac_hdmi_jack_port_init(component, &card->dapm);
}
+static int __maybe_unused skylake_nau8825_resume_post(struct snd_soc_card *card)
+{
+ struct snd_soc_dai *codec_dai;
+
+ codec_dai = snd_soc_card_get_codec_dai(card, SKL_NUVOTON_CODEC_DAI);
+ if (!codec_dai) {
+ dev_err(card->dev, "Codec dai not found\n");
+ return -EIO;
+ }
+
+ dev_dbg(codec_dai->dev, "playback_active:%d playback_widget->active:%d codec_dai->rate:%d\n",
+ codec_dai->stream_active[SNDRV_PCM_STREAM_PLAYBACK],
+ codec_dai->playback_widget->active,
+ codec_dai->rate);
+
+ if (codec_dai->stream_active[SNDRV_PCM_STREAM_PLAYBACK] &&
+ codec_dai->playback_widget->active)
+ snd_soc_dai_set_sysclk(codec_dai, NAU8825_CLK_FLL_FS, 0,
+ SND_SOC_CLOCK_IN);
+
+ return 0;
+}
+
/* skylake audio machine driver for SPT + NAU88L25 */
static struct snd_soc_card skylake_audio_card = {
.name = "sklnau8825max",
.owner = THIS_MODULE,
+ .resume_post = skylake_nau8825_resume_post,
.dai_link = skylake_dais,
.num_links = ARRAY_SIZE(skylake_dais),
.controls = skylake_controls,
diff --git a/sound/soc/intel/boards/skl_nau88l25_ssm4567.c b/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
index 4b317bcf6ea0..09f090ba7fec 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>
@@ -57,7 +58,7 @@ 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;
@@ -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 +339,39 @@ 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);
+ int ret = 0;
- if (ret < 0)
- dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n", ret);
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ 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;
+ case SNDRV_PCM_TRIGGER_RESUME:
+ 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[] = {
@@ -671,10 +681,34 @@ static int skylake_card_late_probe(struct snd_soc_card *card)
return hdac_hdmi_jack_port_init(component, &card->dapm);
}
+static int __maybe_unused skylake_nau8825_resume_post(struct snd_soc_card *card)
+{
+ struct snd_soc_dai *codec_dai;
+
+ codec_dai = snd_soc_card_get_codec_dai(card, SKL_NUVOTON_CODEC_DAI);
+ if (!codec_dai) {
+ dev_err(card->dev, "Codec dai not found\n");
+ return -EIO;
+ }
+
+ dev_dbg(codec_dai->dev, "playback_active:%d playback_widget->active:%d codec_dai->rate:%d\n",
+ codec_dai->stream_active[SNDRV_PCM_STREAM_PLAYBACK],
+ codec_dai->playback_widget->active,
+ codec_dai->rate);
+
+ if (codec_dai->stream_active[SNDRV_PCM_STREAM_PLAYBACK] &&
+ codec_dai->playback_widget->active)
+ snd_soc_dai_set_sysclk(codec_dai, NAU8825_CLK_FLL_FS, 0,
+ SND_SOC_CLOCK_IN);
+
+ return 0;
+}
+
/* skylake audio machine driver for SPT + NAU88L25 */
static struct snd_soc_card skylake_audio_card = {
.name = "sklnau8825adi",
.owner = THIS_MODULE,
+ .resume_post = skylake_nau8825_resume_post,
.dai_link = skylake_dais,
.num_links = ARRAY_SIZE(skylake_dais),
.controls = skylake_controls,
--
2.17.1
Sorry, I couldn't resist adding three more comments to improve further:
> -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);
> + int ret = 0;
>
> - if (ret < 0)
> - dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n", ret);
> + switch (cmd) {
> + case SNDRV_PCM_TRIGGER_START:
> + ret = snd_soc_dai_set_sysclk(codec_dai, NAU8825_CLK_FLL_FS, 0,
> + SND_SOC_CLOCK_IN);
Maybe a simple comment to explain what this does?
> + 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;
You could replace this by a /* fallthrough */ statement?
> + case SNDRV_PCM_TRIGGER_RESUME:
> + 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;
> + }
> +static int __maybe_unused skylake_nau8825_resume_post(struct snd_soc_card *card)
> +{
> + struct snd_soc_dai *codec_dai;
> +
> + codec_dai = snd_soc_card_get_codec_dai(card, SKL_NUVOTON_CODEC_DAI);
> + if (!codec_dai) {
> + dev_err(card->dev, "Codec dai not found\n");
> + return -EIO;
> + }
> +
> + dev_dbg(codec_dai->dev, "playback_active:%d playback_widget->active:%d codec_dai->rate:%d\n",
> + codec_dai->stream_active[SNDRV_PCM_STREAM_PLAYBACK],
> + codec_dai->playback_widget->active,
> + codec_dai->rate);
> +
> + if (codec_dai->stream_active[SNDRV_PCM_STREAM_PLAYBACK] &&
> + codec_dai->playback_widget->active)
> + snd_soc_dai_set_sysclk(codec_dai, NAU8825_CLK_FLL_FS, 0,
> + SND_SOC_CLOCK_IN);
And that part is also worthy of a comment, e.g. why not do this as part
of the TRIGGER_RESUME and why only for playback?
> --- a/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
> +++ b/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
same comments for this other machine driver.
Thank you Pierre.
All your comments are addressed in V4.
skylake_nau8825_resume_post() is in fact unnecessary as my test shows
no difference if we do the FLL setup in skylake_nau8825_trigger().
patch is coming...
wt., 8 wrz 2020 o 22:59 Pierre-Louis Bossart
<[email protected]> napisał(a):
>
> Sorry, I couldn't resist adding three more comments to improve further:
>
> > -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);
> > + int ret = 0;
> >
> > - if (ret < 0)
> > - dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n", ret);
> > + switch (cmd) {
> > + case SNDRV_PCM_TRIGGER_START:
> > + ret = snd_soc_dai_set_sysclk(codec_dai, NAU8825_CLK_FLL_FS, 0,
> > + SND_SOC_CLOCK_IN);
>
> Maybe a simple comment to explain what this does?
>
> > + 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;
>
> You could replace this by a /* fallthrough */ statement?
>
> > + case SNDRV_PCM_TRIGGER_RESUME:
> > + 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;
> > + }
>
> > +static int __maybe_unused skylake_nau8825_resume_post(struct snd_soc_card *card)
> > +{
> > + struct snd_soc_dai *codec_dai;
> > +
> > + codec_dai = snd_soc_card_get_codec_dai(card, SKL_NUVOTON_CODEC_DAI);
> > + if (!codec_dai) {
> > + dev_err(card->dev, "Codec dai not found\n");
> > + return -EIO;
> > + }
> > +
> > + dev_dbg(codec_dai->dev, "playback_active:%d playback_widget->active:%d codec_dai->rate:%d\n",
> > + codec_dai->stream_active[SNDRV_PCM_STREAM_PLAYBACK],
> > + codec_dai->playback_widget->active,
> > + codec_dai->rate);
> > +
> > + if (codec_dai->stream_active[SNDRV_PCM_STREAM_PLAYBACK] &&
> > + codec_dai->playback_widget->active)
> > + snd_soc_dai_set_sysclk(codec_dai, NAU8825_CLK_FLL_FS, 0,
> > + SND_SOC_CLOCK_IN);
>
> And that part is also worthy of a comment, e.g. why not do this as part
> of the TRIGGER_RESUME and why only for playback?
>
>
> > --- a/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
> > +++ b/sound/soc/intel/boards/skl_nau88l25_ssm4567.c
>
> same comments for this other machine driver.
>