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ASoC: wm8753: Skip noop reconfiguration of DAI mode

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This patch makes it possible to set DAI mode to its currently applied
value even if codec is active. This is necessary to allow

aplay -t raw -r 44100 -f S16_LE -c 2 < /dev/urandom &
alsactl store -f backup.state
alsactl restore -f backup.state

to work without returning errors. This patch is based on a patch sent
by Klaus Kurzmann <mok@fluxnetz.de>.

Signed-off-by: Timo Juhani Lindfors <timo.lindfors@iki.fi>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Timo Juhani Lindfors 2011-11-17 02:52:50 +02:00 committed by Mark Brown
parent 0f768a7235
commit 2391a0e067
1 changed files with 3 additions and 0 deletions
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3
sound/soc/codecs/wm8753.c
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@ -190,6 +190,9 @@ static int wm8753_set_dai(struct snd_kcontrol *kcontrol,
struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);
u16 ioctl;
if (wm8753->dai_func == ucontrol->value.integer.value[0])
return 0;
if (codec->active)
return -EBUSY;