[Sound-open-firmware] [PATCH 8/8] ssp: switch to use SCR for BCLK

[Keyon Jie]

switch the BCLK generated from shim ssp clock divider to
SSCR0.SCR.

please note that we need clear SSPSP.SFRMP while using
SSCR0.SCR, otherwise the L/R channel may swap, no document
to describe that though.

Signed-off-by: Keyon Jie <yang.jie at linux.intel.com>
---
 src/drivers/ssp.c   | 4 +---
 src/ipc/intel-ipc.c | 9 ---------
 2 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/src/drivers/ssp.c b/src/drivers/ssp.c
index 77341b6..c0d6251 100644
--- a/src/drivers/ssp.c
+++ b/src/drivers/ssp.c
@@ -221,7 +221,6 @@ static inline int ssp_set_config(struct dai *dai, struct dai_config *dai_config)
 	/* clock signal polarity */
 	switch (dai->config.format & DAI_FMT_INV_MASK) {
 	case DAI_FMT_NB_NF:
-		sspsp |= SSPSP_SFRMP;
 		break;
 	case DAI_FMT_NB_IF:
 		break;
@@ -253,8 +252,7 @@ static inline int ssp_set_config(struct dai *dai, struct dai_config *dai_config)
 		return -ENODEV;
 	}
 
-	/* TODO: clock frequency */
-	//scr = dai_config->mclk / (
+	sscr0 |= SSCR0_SCR(dai->config.mclk_fs / dai->config.bclk_fs - 1);
 
 	/* format */
 	switch (dai->config.format & DAI_FMT_FORMAT_MASK) {
diff --git a/src/ipc/intel-ipc.c b/src/ipc/intel-ipc.c
index 33727a0..4d2acb2 100644
--- a/src/ipc/intel-ipc.c
+++ b/src/ipc/intel-ipc.c
@@ -530,7 +530,6 @@ static uint32_t ipc_device_set_formats(uint32_t header)
 {
 	struct ipc_intel_ipc_device_config_req config_req;
 	struct ipc_dai_dev *dai_dev;
-	int err;
 
 	trace_ipc("DsF");
 
@@ -570,14 +569,6 @@ static uint32_t ipc_device_set_formats(uint32_t header)
 	dai_dev->dai_config.mclk_fs = 400;
 	dai_dev->dai_config.clk_src = SSP_CLK_EXT;
 
-	/* set SSP M/N dividers */
-	err = platform_ssp_set_mn(config_req.ssp_interface, 48000,
-			dai_dev->dai_config.bclk_fs);
-	if (err < 0) {
-		trace_ipc_error("eDs");
-		goto error;
-	}
-
 	comp_dai_config(dai_dev->dev.cd, &dai_dev->dai_config);
 
 error:
-- 
2.7.4