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Unverified Commit 728815e3 authored by Danny Smith's avatar Danny Smith Committed by Mark Brown
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ASoC: adau17x1: Do not reload dsp-fw if samplerate has not changed 



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: default avatarDanny Smith <dannys@axis.com>
Signed-off-by: default avatarRobert Rosengren <robert.rosengren@axis.com>
Acked-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 953de782

sound/soc/codecs/adau17x1.c

+9 −0
Original line number Diff line number Diff line
@@ -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);