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Subject[PATCH v4 08/17] ASoC: fsl_ssi: Add DAIFMT define for AC97
Date
The _fsl_ssi_set_dai_fmt() bypasses an undefined format for AC97
mode. However, it's not really necessary if AC97 has its complete
format defined.

So this patch adds a DAIFMT macro of complete format including a
clock direction and polarity.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Tested-by: Caleb Crome <caleb@crome.org>
---
sound/soc/fsl/fsl_ssi.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 7a6a32b..b76a517 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -90,6 +90,16 @@
SNDRV_PCM_FMTBIT_S24_LE)
#endif

+/*
+ * In AC97 mode, TXDIR bit is forced to 0 and TFDIR bit is forced to 1:
+ * - SSI inputs external bit clock and outputs frame sync clock -- CBM_CFS
+ * - Also have NB_NF to mark these two clocks will not be inverted
+ */
+#define FSLSSI_AC97_DAIFMT \
+ (SND_SOC_DAIFMT_AC97 | \
+ SND_SOC_DAIFMT_CBM_CFS | \
+ SND_SOC_DAIFMT_NB_NF)
+
#define FSLSSI_SIER_DBG_RX_FLAGS \
(SSI_SIER_RFF0_EN | \
SSI_SIER_RLS_EN | \
@@ -964,8 +974,7 @@ static int _fsl_ssi_set_dai_fmt(struct device *dev,
scr &= ~SSI_SCR_SYS_CLK_EN;
break;
default:
- if (!fsl_ssi_is_ac97(ssi))
- return -EINVAL;
+ return -EINVAL;
}

stcr |= strcr;
@@ -1372,7 +1381,7 @@ static int fsl_ssi_probe(struct platform_device *pdev)
sprop = of_get_property(np, "fsl,mode", NULL);
if (sprop) {
if (!strcmp(sprop, "ac97-slave"))
- ssi->dai_fmt = SND_SOC_DAIFMT_AC97;
+ ssi->dai_fmt = FSLSSI_AC97_DAIFMT;
}

/* Select DMA or FIQ */
--
2.7.4
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