cavs: ssp: add delay after start

Adds delay after starting SSP interface.
It allows for SSP in slave mode to nicely
synchronize with clock and frame inputs.

Signed-off-by: Tomasz Lauda <tomasz.lauda@linux.intel.com>

src/drivers/intel/cavs/ssp.c

@@ -743,6 +743,9 @@ static void ssp_start(struct dai *dai, int direction)
 		ssp_update_bits(dai, SSRSA, 0x1 << 8, 0x1 << 8);
 	}
 
+	/* wait to get valid fifo status */
+	wait_delay(PLATFORM_SSP_DELAY);
+
 	spin_unlock(&dai->lock);
 }
 
@@ -754,7 +757,7 @@ static void ssp_stop(struct dai *dai, int direction)
 	spin_lock(&dai->lock);
 
 	/* wait to get valid fifo status */
-	wait_delay(PLATFORM_SSP_STOP_DELAY);
+	wait_delay(PLATFORM_SSP_DELAY);
 
 	/* stop Rx if neeed */
 	if (direction == DAI_DIR_CAPTURE &&

src/platform/apollolake/include/platform/platform.h

@@ -142,8 +142,8 @@ struct sof;
 /* the watermark for the SSP fifo depth setting */
 #define SSP_FIFO_WATERMARK	8
 
-/* minimal SSP port stop delay in cycles */
-#define PLATFORM_SSP_STOP_DELAY	2400
+/* minimal SSP port delay in cycles */
+#define PLATFORM_SSP_DELAY	2400
 
 /* timer driven scheduling start offset in microseconds */
 #define PLATFORM_TIMER_START_OFFSET	100

src/platform/cannonlake/include/platform/platform.h

@@ -143,8 +143,8 @@ struct sof;
 /* the watermark for the SSP fifo depth setting */
 #define SSP_FIFO_WATERMARK	8
 
-/* minimal SSP port stop delay in cycles */
-#define PLATFORM_SSP_STOP_DELAY	3000
+/* minimal SSP port delay in cycles */
+#define PLATFORM_SSP_DELAY	3000
 
 /* timer driven scheduling start offset in microseconds */
 #define PLATFORM_TIMER_START_OFFSET	100

src/platform/icelake/include/platform/platform.h

@@ -143,8 +143,8 @@ struct sof;
 /* the watermark for the SSP fifo depth setting */
 #define SSP_FIFO_WATERMARK	8
 
-/* minimal SSP port stop delay in cycles */
-#define PLATFORM_SSP_STOP_DELAY	4800
+/* minimal SSP port delay in cycles */
+#define PLATFORM_SSP_DELAY	4800
 
 /* timer driven scheduling start offset in microseconds */
 #define PLATFORM_TIMER_START_OFFSET	100

src/platform/suecreek/include/platform/platform.h

@@ -146,8 +146,8 @@ struct sof;
 /* the watermark for the SSP fifo depth setting */
 #define SSP_FIFO_WATERMARK	8
 
-/* minimal SSP port stop delay in cycles */
-#define PLATFORM_SSP_STOP_DELAY	3000
+/* minimal SSP port delay in cycles */
+#define PLATFORM_SSP_DELAY	3000
 
 /* timer driven scheduling start offset in microseconds */
 #define PLATFORM_TIMER_START_OFFSET	100