From: Kuninori Morimoto kuninori.morimoto.gx@renesas.com
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 --- v1 -> v2
- Merged v1's [1/2][2/2] into this patch. - Removed CKS settings (= was [1/2]). It was Master mode settings which is not yet supported - tidyup ak4613_hw_constraints() method
sound/soc/codecs/ak4613.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+)
diff --git a/sound/soc/codecs/ak4613.c b/sound/soc/codecs/ak4613.c index 27c44c7..690edeb 100644 --- a/sound/soc/codecs/ak4613.c +++ b/sound/soc/codecs/ak4613.c @@ -94,6 +94,8 @@ struct ak4613_interface { struct ak4613_priv { struct mutex lock; const struct ak4613_interface *iface; + struct snd_pcm_hw_constraint_list constraint; + unsigned int sysclk;
unsigned int fmt; u8 oc; @@ -252,6 +254,50 @@ static void ak4613_dai_shutdown(struct snd_pcm_substream *substream, 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, struct snd_soc_dai *dai) { @@ -260,6 +306,19 @@ static int ak4613_dai_startup(struct snd_pcm_substream *substream,
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; }
@@ -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 = { .startup = ak4613_dai_startup, .shutdown = ak4613_dai_shutdown, + .set_sysclk = ak4613_dai_set_sysclk, .set_fmt = ak4613_dai_set_fmt, .hw_params = ak4613_dai_hw_params, }; @@ -529,6 +589,7 @@ static int ak4613_i2c_probe(struct i2c_client *i2c,
priv->iface = NULL; priv->cnt = 0; + priv->sysclk = 0;
mutex_init(&priv->lock);