ASoC: omap-mcbsp: Move out the FIFO check from set_threshold and get_delay

Check if the McBSP have FIFO in the omap_mcbsp_set_threshold() and
omap_mcbsp_dai_delay() delay function to skip calling the lower layer if
it is not needed.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Tested-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/omap/mcbsp.c

@@ -450,9 +450,6 @@ int omap_st_is_enabled(struct omap_mcbsp *mcbsp)
  */
 void omap_mcbsp_set_tx_threshold(struct omap_mcbsp *mcbsp, u16 threshold)
 {
-	if (mcbsp->pdata->buffer_size == 0)
-		return;
-
 	if (threshold && threshold <= mcbsp->max_tx_thres)
 		MCBSP_WRITE(mcbsp, THRSH2, threshold - 1);
 }
@@ -464,9 +461,6 @@ void omap_mcbsp_set_tx_threshold(struct omap_mcbsp *mcbsp, u16 threshold)
  */
 void omap_mcbsp_set_rx_threshold(struct omap_mcbsp *mcbsp, u16 threshold)
 {
-	if (mcbsp->pdata->buffer_size == 0)
-		return;
-
 	if (threshold && threshold <= mcbsp->max_rx_thres)
 		MCBSP_WRITE(mcbsp, THRSH1, threshold - 1);
 }
@@ -478,9 +472,6 @@ u16 omap_mcbsp_get_tx_delay(struct omap_mcbsp *mcbsp)
 {
 	u16 buffstat;
 
-	if (mcbsp->pdata->buffer_size == 0)
-		return 0;
-
 	/* Returns the number of free locations in the buffer */
 	buffstat = MCBSP_READ(mcbsp, XBUFFSTAT);
 
@@ -496,9 +487,6 @@ u16 omap_mcbsp_get_rx_delay(struct omap_mcbsp *mcbsp)
 {
 	u16 buffstat, threshold;
 
-	if (mcbsp->pdata->buffer_size == 0)
-		return 0;
-
 	/* Returns the number of used locations in the buffer */
 	buffstat = MCBSP_READ(mcbsp, RBUFFSTAT);
 	/* RX threshold */

sound/soc/omap/omap-mcbsp.c

@@ -71,6 +71,10 @@ static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream,
 	struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 	int words;
 
+	/* No need to proceed further if McBSP does not have FIFO */
+	if (mcbsp->pdata->buffer_size == 0)
+		return;
+
 	/*
 	 * Configure McBSP threshold based on either:
 	 * packet_size, when the sDMA is in packet mode, or based on the
@@ -233,6 +237,10 @@ static snd_pcm_sframes_t omap_mcbsp_dai_delay(
 	u16 fifo_use;
 	snd_pcm_sframes_t delay;
 
+	/* No need to proceed further if McBSP does not have FIFO */
+	if (mcbsp->pdata->buffer_size == 0)
+		return 0;
+
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 		fifo_use = omap_mcbsp_get_tx_delay(mcbsp);
 	else