[alsa-devel] [PATCH] imx-ssi.c: fix I2S slave setup

[Eric Bénard]

* without this fix, the waveform on the SSI port are not real
I2S signal (at least on i.MX27's SSI4)

* original Freescale's driver has
	if (((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S)
	    && ssi_mode->network_mode) {
		scr &= ~SSI_SCR_I2S_MODE_MASK;
		scr |= SSI_SCR_I2S_MODE_SLAVE;
	}
So as now the SSI is set in network mode as a default when running in
I2S format, it seems reasonable to also set I2S_MODE_SLAVE

Signed-off-by: Eric Bénard <eric at eukrea.com>
---
 sound/soc/imx/imx-ssi.c |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/sound/soc/imx/imx-ssi.c b/sound/soc/imx/imx-ssi.c
index 80b4fee..c5e1626 100644
--- a/sound/soc/imx/imx-ssi.c
+++ b/sound/soc/imx/imx-ssi.c
@@ -83,8 +83,6 @@ static int imx_ssi_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
 /*
  * SSI DAI format configuration.
  * Should only be called when port is inactive (i.e. SSIEN = 0).
- * Note: We don't use the I2S modes but instead manually configure the
- * SSI for I2S because the I2S mode is only a register preset.
  */
 static int imx_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
 {
@@ -98,7 +96,7 @@ static int imx_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
 	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;
-		scr |= SSI_SCR_NET;
+		scr |= SSI_SCR_NET | SSI_SCR_I2S_MODE_SLAVE;
 		break;
 	case SND_SOC_DAIFMT_LEFT_J:
 		/* data on rising edge of bclk, frame high with data */
-- 
1.6.3.3