Merge pull request #145 from zhigang-wu/topic/test

define the ssp fifo depth macro to be generic

Author: lgirdwood

src/drivers/apl-ssp.c

@@ -574,8 +574,10 @@ static inline int ssp_set_config(struct dai *dai,
 			goto out;
 	}
 
-	tft = MIN(8, sample_width * active_tx_slots);
-	rft = MIN(8, sample_width * active_rx_slots);
+	tft = MIN(SSP_FIFO_DEPTH - SSP_FIFO_WATERMARK,
+		  sample_width * active_tx_slots);
+	rft = MIN(SSP_FIFO_DEPTH - SSP_FIFO_WATERMARK,
+		  sample_width * active_rx_slots);
 
 	sscr3 |= SSCR3_TX(tft) | SSCR3_RX(rft);
 

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

@@ -121,6 +121,12 @@ struct sof;
 /* minimal L1 exit time in cycles */
 #define PLATFORM_FORCE_L1_EXIT_TIME	585
 
+/* the SSP port fifo depth */
+#define SSP_FIFO_DEPTH		16
+
+/* the watermark for the SSP fifo depth setting */
+#define SSP_FIFO_WATERMARK	8
+
 /* Platform defined panic code */
 static inline void platform_panic(uint32_t p)
 {

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

@@ -118,6 +118,12 @@ struct sof;
 /* minimal L1 exit time in cycles */
 #define PLATFORM_FORCE_L1_EXIT_TIME	482
 
+/* the SSP port fifo depth */
+#define SSP_FIFO_DEPTH		16
+
+/* the watermark for the SSP fifo depth setting */
+#define SSP_FIFO_WATERMARK	8
+
 /* Platform defined trace code */
 static inline void platform_panic(uint32_t p)
 {