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ASoC: adau17x1: Do not reload dsp-fw if samplerate has not changed

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Reloading fw causes an audiable popping sound, we can avoid this
by not reloading if the samplerate is the same as before.

Signed-off-by: Danny Smith <dannys@axis.com>
Signed-off-by: Robert Rosengren <robert.rosengren@axis.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Danny Smith 2018-04-09 15:13:36 +02:00 committed by Mark Brown
parent 953de782cc
commit 728815e3fe
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1 changed files with 9 additions and 0 deletions
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9
sound/soc/codecs/adau17x1.c
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@ -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);