When the fsl-ssi unit is used in i2s slave mode, it is possible that the SSI unit starts transmitting data on the wrong channel. This happens because the SSI does not synchronize with the left-right-clock by default.
This patch enables transmit enable synchronization.
Signed-off-by: Markus Pargmann mpa@pengutronix.de --- sound/soc/fsl/fsl_ssi.c | 1 + sound/soc/fsl/fsl_ssi.h | 1 + 2 files changed, 2 insertions(+)
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 56dbd77..3b0dffd 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -615,6 +615,7 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private, regmap_read(regs, CCSR_SSI_SCR, &scr); scr &= ~(CCSR_SSI_SCR_SYN | CCSR_SSI_SCR_I2S_MODE_MASK); scr |= CCSR_SSI_SCR_NET; + scr |= CCSR_SSI_SCR_SYNC_TX_FS;
mask = CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TFDIR | CCSR_SSI_STCR_TXDIR | CCSR_SSI_STCR_TSCKP | CCSR_SSI_STCR_TFSI | CCSR_SSI_STCR_TFSL | diff --git a/sound/soc/fsl/fsl_ssi.h b/sound/soc/fsl/fsl_ssi.h index d5b7feb..5065105 100644 --- a/sound/soc/fsl/fsl_ssi.h +++ b/sound/soc/fsl/fsl_ssi.h @@ -37,6 +37,7 @@ #define CCSR_SSI_SACCEN 0x54 #define CCSR_SSI_SACCDIS 0x58
+#define CCSR_SSI_SCR_SYNC_TX_FS 0x00001000 #define CCSR_SSI_SCR_RFR_CLK_DIS 0x00000800 #define CCSR_SSI_SCR_TFR_CLK_DIS 0x00000400 #define CCSR_SSI_SCR_TCH_EN 0x00000100