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ASoC: rt5670: check if asrc is useable

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To use ASRC, the sysclk should be faster than 384 times sample rate of I2S1.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Bard Liao 2014-11-17 15:27:21 +08:00 committed by Mark Brown
parent 044b724ada
commit e50334d4e1
1 changed files with 14 additions and 2 deletions
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16
sound/soc/codecs/rt5670.c
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@ -576,6 +576,18 @@ static int is_using_asrc(struct snd_soc_dapm_widget *source,
}
static int can_use_asrc(struct snd_soc_dapm_widget *source,
struct snd_soc_dapm_widget *sink)
{
struct snd_soc_codec *codec = snd_soc_dapm_to_codec(source->dapm);
struct rt5670_priv *rt5670 = snd_soc_codec_get_drvdata(codec);
if (rt5670->sysclk > rt5670->lrck[RT5670_AIF1] * 384)
return 1;
return 0;
}
/* Digital Mixer */
static const struct snd_kcontrol_new rt5670_sto1_adc_l_mix[] = {
SOC_DAPM_SINGLE("ADC1 Switch", RT5670_STO1_ADC_MIXER,
@ -1639,8 +1651,8 @@ static const struct snd_soc_dapm_route rt5670_dapm_routes[] = {
{ "DAC Mono Right Filter", NULL, "DAC MONO R ASRC", is_using_asrc },
{ "DAC Stereo1 Filter", NULL, "DAC STO ASRC", is_using_asrc },
{ "I2S1", NULL, "I2S1 ASRC" },
{ "I2S2", NULL, "I2S2 ASRC" },
{ "I2S1", NULL, "I2S1 ASRC", can_use_asrc},
{ "I2S2", NULL, "I2S2 ASRC", can_use_asrc},
{ "DMIC1", NULL, "DMIC L1" },
{ "DMIC1", NULL, "DMIC R1" },