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ASoC: davinci-mcasp: Support for one channel (mono) audio

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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>
This commit is contained in:
Peter Ujfalusi 2017-05-11 09:58:22 +03:00 committed by Mark Brown
parent 2ea659a9ef
commit e4798d2654
1 changed files with 6 additions and 6 deletions
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12
sound/soc/davinci/davinci-mcasp.c
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@ -629,7 +629,7 @@ static int davinci_mcasp_ch_constraint(struct davinci_mcasp *mcasp, int stream,
if (mcasp->tdm_mask[stream])
slots = hweight32(mcasp->tdm_mask[stream]);
for (i = 2; i <= slots; i++)
for (i = 1; i <= slots; i++)
list[count++] = i;
for (i = 2; i <= serializers; i++)
@ -1297,7 +1297,7 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_CHANNELS,
2, max_channels);
0, max_channels);
snd_pcm_hw_constraint_list(substream->runtime,
0, SNDRV_PCM_HW_PARAM_CHANNELS,
@ -1459,13 +1459,13 @@ static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
.suspend = davinci_mcasp_suspend,
.resume = davinci_mcasp_resume,
.playback = {
.channels_min = 2,
.channels_min = 1,
.channels_max = 32 * 16,
.rates = DAVINCI_MCASP_RATES,
.formats = DAVINCI_MCASP_PCM_FMTS,
},
.capture = {
.channels_min = 2,
.channels_min = 1,
.channels_max = 32 * 16,
.rates = DAVINCI_MCASP_RATES,
.formats = DAVINCI_MCASP_PCM_FMTS,
@ -1971,12 +1971,12 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
*/
mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list =
devm_kzalloc(mcasp->dev, sizeof(unsigned int) *
(32 + mcasp->num_serializer - 2),
(32 + mcasp->num_serializer - 1),
GFP_KERNEL);
mcasp->chconstr[SNDRV_PCM_STREAM_CAPTURE].list =
devm_kzalloc(mcasp->dev, sizeof(unsigned int) *
(32 + mcasp->num_serializer - 2),
(32 + mcasp->num_serializer - 1),
GFP_KERNEL);
if (!mcasp->chconstr[SNDRV_PCM_STREAM_PLAYBACK].list ||