ASoC: davinci-mcasp: Support for DSP_A format

DSP_A is like DSP_B mode but with one bit delay after the FS.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index f0c98653bfe7..58b6d47cc8f8 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -275,6 +275,13 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 
         pm_runtime_get_sync(mcasp->dev);
         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+        case SND_SOC_DAIFMT_DSP_A:
+                mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);
+                mcasp_clr_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG, FSRDUR);
+
+                /* 1st data bit occur one ACLK cycle after the frame sync */
+                data_delay = 1;
+                break;
         case SND_SOC_DAIFMT_DSP_B:
         case SND_SOC_DAIFMT_AC97:
                 mcasp_clr_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR);