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ASoC: ak4613: add hw_constraint rule for Sampling Rate

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Current ak4613 accepts all range of Sampling Rate, but it depends on
inputed master clock. This patch adds hw constraint rule for it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2017-06-16 01:47:34 +00:00 committed by Mark Brown
parent a83ac48609
commit 907cd8809e
1 changed files with 61 additions and 0 deletions
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61
sound/soc/codecs/ak4613.c
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@ -94,6 +94,8 @@ struct ak4613_interface {
struct ak4613_priv { struct ak4613_priv {
struct mutex lock; struct mutex lock;
const struct ak4613_interface *iface; const struct ak4613_interface *iface;
struct snd_pcm_hw_constraint_list constraint;
unsigned int sysclk;
unsigned int fmt; unsigned int fmt;
u8 oc; u8 oc;
@ -252,6 +254,50 @@ static void ak4613_dai_shutdown(struct snd_pcm_substream *substream,
mutex_unlock(&priv->lock); mutex_unlock(&priv->lock);
} }
static void ak4613_hw_constraints(struct ak4613_priv *priv,
struct snd_pcm_runtime *runtime)
{
static const unsigned int ak4613_rates[] = {
32000,
44100,
48000,
64000,
88200,
96000,
176400,
192000,
};
struct snd_pcm_hw_constraint_list *constraint = &priv->constraint;
unsigned int fs;
int i;
constraint->list = ak4613_rates;
constraint->mask = 0;
constraint->count = 0;
/*
* Slave Mode
* Normal: [32kHz, 48kHz] : 256fs,384fs or 512fs
* Double: [64kHz, 96kHz] : 256fs
* Quad : [128kHz,192kHz]: 128fs
*
* Master mode
* Normal: [32kHz, 48kHz] : 256fs or 512fs
* Double: [64kHz, 96kHz] : 256fs
* Quad : [128kHz,192kHz]: 128fs
*/
for (i = 0; i < ARRAY_SIZE(ak4613_rates); i++) {
/* minimum fs on each range */
fs = (ak4613_rates[i] <= 96000) ? 256 : 128;
if (priv->sysclk >= ak4613_rates[i] * fs)
constraint->count = i + 1;
}
snd_pcm_hw_constraint_list(runtime, 0,
SNDRV_PCM_HW_PARAM_RATE, constraint);
}
static int ak4613_dai_startup(struct snd_pcm_substream *substream, static int ak4613_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai) struct snd_soc_dai *dai)
{ {
@ -260,6 +306,19 @@ static int ak4613_dai_startup(struct snd_pcm_substream *substream,
priv->cnt++; priv->cnt++;
ak4613_hw_constraints(priv, substream->runtime);
return 0;
}
static int ak4613_dai_set_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct ak4613_priv *priv = snd_soc_codec_get_drvdata(codec);
priv->sysclk = freq;
return 0; return 0;
} }
@ -411,6 +470,7 @@ static int ak4613_set_bias_level(struct snd_soc_codec *codec,
static const struct snd_soc_dai_ops ak4613_dai_ops = { static const struct snd_soc_dai_ops ak4613_dai_ops = {
.startup = ak4613_dai_startup, .startup = ak4613_dai_startup,
.shutdown = ak4613_dai_shutdown, .shutdown = ak4613_dai_shutdown,
.set_sysclk = ak4613_dai_set_sysclk,
.set_fmt = ak4613_dai_set_fmt, .set_fmt = ak4613_dai_set_fmt,
.hw_params = ak4613_dai_hw_params, .hw_params = ak4613_dai_hw_params,
}; };
@ -529,6 +589,7 @@ static int ak4613_i2c_probe(struct i2c_client *i2c,
priv->iface = NULL; priv->iface = NULL;
priv->cnt = 0; priv->cnt = 0;
priv->sysclk = 0;
mutex_init(&priv->lock); mutex_init(&priv->lock);