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ASoC: davinci-mcasp: Support for one channel (mono) audio
Mono audio can be achieved by configuring McASP to transmit/receive only during one timeslot. McASP will still going to generate clocks for the other slot(s), but will only use the single slot to transmit/receive. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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1 changed files with 6 additions and 6 deletions
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@ -629,7 +629,7 @@ static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp, int stream,
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if (mcasp->tdm_mask[stream])
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slots = hweight32(mcasp->tdm_mask[stream]);
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for (i = 2; i <= slots; i++)
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for (i = 1; i <= slots; i++)
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list[count++] = i;
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for (i = 2; i <= serializers; i++)
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@ -1297,7 +1297,7 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
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snd_pcm_hw_constraint_minmax(substream->runtime,
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SNDRV_PCM_HW_PARAM_CHANNELS,
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2, max_channels);
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0, max_channels);
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snd_pcm_hw_constraint_list(substream->runtime,
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0, SNDRV_PCM_HW_PARAM_CHANNELS,
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@ -1459,13 +1459,13 @@ static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
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.suspend = davinci_mcasp_suspend,
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.resume = davinci_mcasp_resume,
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.playback = {
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.channels_min = 2,
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.channels_min = 1,
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.channels_max = 32 * 16,
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.rates = DAVINCI_MCASP_RATES,
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.formats = DAVINCI_MCASP_PCM_FMTS,
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},
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.capture = {
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.channels_min = 2,
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.channels_min = 1,
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.channels_max = 32 * 16,
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.rates = DAVINCI_MCASP_RATES,
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.formats = DAVINCI_MCASP_PCM_FMTS,
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@ -1971,12 +1971,12 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
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*/
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mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list =
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devm_kzalloc(mcasp->dev, sizeof(unsigned int) *
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(32 + mcasp->num_serializer - 2),
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(32 + mcasp->num_serializer - 1),
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GFP_KERNEL);
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mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list =
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devm_kzalloc(mcasp->dev, sizeof(unsigned int) *
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(32 + mcasp->num_serializer - 2),
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(32 + mcasp->num_serializer - 1),
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GFP_KERNEL);
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if (!mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list ||
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