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ASoC: Allow PCMs to restrict the supported formats

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Some DMA cores might add additional restrictions on which in memory audio
formats can be supported by the compound sound card. If the PCM component
specifies a set of formats it supports (by setting the formats field to non 0)
take these into account when calculating the format set for the compound sound
card.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Lars-Peter Clausen 2014-01-06 14:19:16 +01:00 committed by Mark Brown
parent 1e9de42f43
commit 16d7ea9167
1 changed files with 4 additions and 1 deletions
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5
sound/soc/soc-pcm.c
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@ -158,7 +158,10 @@ static void soc_pcm_init_runtime_hw(struct snd_pcm_hardware *hw,
cpu_stream->channels_min);
hw->channels_max = min(codec_stream->channels_max,
cpu_stream->channels_max);
hw->formats = codec_stream->formats & cpu_stream->formats;
if (hw->formats)
hw->formats &= codec_stream->formats & cpu_stream->formats;
else
hw->formats = codec_stream->formats & cpu_stream->formats;
hw->rates = codec_stream->rates & cpu_stream->rates;
if (codec_stream->rates
& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))