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ASoC: codecs: ad193x: Fix frame polarity for DSP_A format

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By default, the codec starts to interpret the left (first) channel on
the falling edge (low polarity) of LRCLK. However, for DSP_A, the left
channel needs to start on the rising edge of LRCLK. This patch fixes
this channel swap by toggling the bit which selects the LRCLK polarity.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Codrin Ciubotariu 2019-02-18 16:10:32 +00:00 committed by Mark Brown
parent 75c2ecb4bd
commit 90f6e68031
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1 changed files with 6 additions and 0 deletions
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6
sound/soc/codecs/ad193x.c
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@ -228,6 +228,12 @@ static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
return -EINVAL;
}
/* For DSP_*, LRCLK's polarity must be inverted */
if (fmt & SND_SOC_DAIFMT_DSP_A) {
change_bit(ffs(AD193X_DAC_LEFT_HIGH) - 1,
(unsigned long *)&dac_fmt);
}
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
adc_fmt |= AD193X_ADC_LCR_MASTER;