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ALSA: Fix handling of multiple msbits constraints on the same runtime 

If the sound card is made up of discrete components, each with their own
driver (e.g. like in the ASoC case), we might end up with multiple msbits
constraint rules installed. Currently this will result in msbits being set
to whatever the last rule set it to.

This patch updates the behavior of the rule to choose the minimum (other
than zero) of all the installed rules.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Lars-Peter Clausen 2014-12-29 18:43:36 +01:00 committed by Takashi Iwai
parent 97bf6af1f9
commit 19f52fae5a
1 changed files with 1 additions and 1 deletions
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2
sound/core/pcm_lib.c
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@ -1300,7 +1300,7 @@ static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params,
unsigned int msbits = l >> 16;
struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
if (snd_interval_single(i) && snd_interval_value(i) == width)
params->msbits = msbits;
params->msbits = min_not_zero(params->msbits, msbits);
return 0;
}