ASoC: rt5670: check if asrc is useable

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>

1 files changed, 14 insertions, 2 deletions

diff --git a/sound/soc/codecs/rt5670.c b/sound/soc/codecs/rt5670.c
index 5e54ac957e47..3ddb34ef77d7 100644
--- a/sound/soc/codecs/rt5670.c
+++ b/sound/soc/codecs/rt5670.c
@@ -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" },