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ASoC: Allow PCMs to restrict the supported formats
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>
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1 changed files with 4 additions and 1 deletions
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@ -158,7 +158,10 @@ static void soc_pcm_init_runtime_hw(struct snd_pcm_hardware *hw,
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cpu_stream->channels_min);
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hw->channels_max = min(codec_stream->channels_max,
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cpu_stream->channels_max);
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hw->formats = codec_stream->formats & cpu_stream->formats;
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if (hw->formats)
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hw->formats &= codec_stream->formats & cpu_stream->formats;
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else
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hw->formats = codec_stream->formats & cpu_stream->formats;
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hw->rates = codec_stream->rates & cpu_stream->rates;
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if (codec_stream->rates
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& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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