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Commit f5e09ef0 authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Takashi Iwai
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[ALSA] at73c213: Add constraints for periods value 



The interrupt handler always provide runtime->period_size data, so it
works correctly only if buffer_size was a multiple of period_size.

This patch fixes periodic click noise.

Signed-off-by: default avatarAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent b32300a4

sound/spi/at73c213.c

+6 −0
Original line number Diff line number Diff line
@@ -210,7 +210,13 @@ static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream) 
{

	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);

	struct snd_pcm_runtime *runtime = substream->runtime;

	int err;



	/* ensure buffer_size is a multiple of period_size */

	err = snd_pcm_hw_constraint_integer(runtime,

					SNDRV_PCM_HW_PARAM_PERIODS);

	if (err < 0)

		return err;

	snd_at73c213_playback_hw.rate_min = chip->bitrate;

	snd_at73c213_playback_hw.rate_max = chip->bitrate;

	runtime->hw = snd_at73c213_playback_hw;