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Diffstat (limited to 'sound/soc/codecs/adau17x1.c')
-rw-r--r--sound/soc/codecs/adau17x1.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/sound/soc/codecs/adau17x1.c b/sound/soc/codecs/adau17x1.c
index 12bf24c26818..ae41edd1c406 100644
--- a/sound/soc/codecs/adau17x1.c
+++ b/sound/soc/codecs/adau17x1.c
@@ -843,6 +843,15 @@ int adau17x1_setup_firmware(struct snd_soc_component *component,
struct adau *adau = snd_soc_component_get_drvdata(component);
struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
+ /* Check if sample rate is the same as before. If it is there is no
+ * point in performing the below steps as the call to
+ * sigmadsp_setup(...) will return directly when it finds the sample
+ * rate to be the same as before. By checking this we can prevent an
+ * audiable popping noise which occours when toggling DSP_RUN.
+ */
+ if (adau->sigmadsp->current_samplerate == rate)
+ return 0;
+
snd_soc_dapm_mutex_lock(dapm);
ret = regmap_read(adau->regmap, ADAU17X1_DSP_SAMPLING_RATE, &dspsr);