ssp: only delay start for the first stream

lyakh · lgirdwood · commit 8fa5ff579351 · 2021-08-31T21:14:37.000+01:00
The initialisation delay in SSP start-up sequence is only needed when
the first stream initialises the SSP. If an SSP port is used for both
playback and capture, the second stream doesn't need to delay start
up again.

Signed-off-by: Guennadi Liakhovetski &lt;guennadi.liakhovetski@linux.intel.com&gt;
diff --git a/src/drivers/intel/ssp/ssp.c b/src/drivers/intel/ssp/ssp.c
@@ -1179,6 +1179,9 @@ static uint32_t ssp_get_init_delay_ms(struct dai *dai)
 {
 	struct ssp_pdata *ssp = dai_get_drvdata(dai);
 
+	if (ssp->clk_active & SSP_CLK_BCLK_ACTIVE)
+		return 0;
+
 	/* drive BCLK early for guaranteed time,
 	 * before first FSYNC, it is required by some codecs
 	 */

Original file line number	Diff line number	Diff line change
`@@ -1179,6 +1179,9 @@ static uint32_t ssp_get_init_delay_ms(struct dai *dai)`
`1179`	`1179`	`{`
`1180`	`1180`	`struct ssp_pdata *ssp = dai_get_drvdata(dai);`
`1181`	`1181`
	`1182`	`+ if (ssp->clk_active & SSP_CLK_BCLK_ACTIVE)`
	`1183`	`+ return 0;`
	`1184`	`+`
`1182`	`1185`	`/* drive BCLK early for guaranteed time,`
`1183`	`1186`	`* before first FSYNC, it is required by some codecs`
`1184`	`1187`	`*/`