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ASoC: imx-ssi: Fix DAI hardware signal inversions

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SND_SOC_DAIFMT_{IB|NB}_{IF|NF} are defined as inverting or not BCLK or
FRM relatively to what is standard for the specified DAI hardware audio
format. Consequently, the absolute polarities of these signals cannot be
derived only from these settings as this driver did. The format has to
be taken into account too.

This fixes inverted left/right channels in I²S mode.

Signed-off-by: Benoît Thébaudeau <benoit@wsystem.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Benoît Thébaudeau 2015-09-29 17:59:14 +02:00 committed by Mark Brown
parent 6ff33f3902
commit b7b01d345b
1 changed files with 9 additions and 10 deletions
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19
sound/soc/fsl/imx-ssi.c
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@ -95,7 +95,8 @@ static int imx_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
/* data on rising edge of bclk, frame low 1clk before data */
strcr |= SSI_STCR_TFSI | SSI_STCR_TEFS | SSI_STCR_TXBIT0;
strcr |= SSI_STCR_TXBIT0 | SSI_STCR_TSCKP | SSI_STCR_TFSI |
SSI_STCR_TEFS;
scr |= SSI_SCR_NET;
if (ssi->flags & IMX_SSI_USE_I2S_SLAVE) {
scr &= ~SSI_I2S_MODE_MASK;
@ -104,33 +105,31 @@ static int imx_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
break;
case SND_SOC_DAIFMT_LEFT_J:
/* data on rising edge of bclk, frame high with data */
strcr |= SSI_STCR_TXBIT0;
strcr |= SSI_STCR_TXBIT0 | SSI_STCR_TSCKP;
break;
case SND_SOC_DAIFMT_DSP_B:
/* data on rising edge of bclk, frame high with data */
strcr |= SSI_STCR_TFSL | SSI_STCR_TXBIT0;
strcr |= SSI_STCR_TXBIT0 | SSI_STCR_TSCKP | SSI_STCR_TFSL;
break;
case SND_SOC_DAIFMT_DSP_A:
/* data on rising edge of bclk, frame high 1clk before data */
strcr |= SSI_STCR_TFSL | SSI_STCR_TXBIT0 | SSI_STCR_TEFS;
strcr |= SSI_STCR_TXBIT0 | SSI_STCR_TSCKP | SSI_STCR_TFSL |
SSI_STCR_TEFS;
break;
}
/* DAI clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_IB_IF:
strcr |= SSI_STCR_TFSI;
strcr &= ~SSI_STCR_TSCKP;
strcr ^= SSI_STCR_TSCKP | SSI_STCR_TFSI;
break;
case SND_SOC_DAIFMT_IB_NF:
strcr &= ~(SSI_STCR_TSCKP | SSI_STCR_TFSI);
strcr ^= SSI_STCR_TSCKP;
break;
case SND_SOC_DAIFMT_NB_IF:
strcr |= SSI_STCR_TFSI | SSI_STCR_TSCKP;
strcr ^= SSI_STCR_TFSI;
break;
case SND_SOC_DAIFMT_NB_NF:
strcr &= ~SSI_STCR_TFSI;
strcr |= SSI_STCR_TSCKP;
break;
}