DP scheduler: Silence benign warnings

SOF emits a flood of seemingly needless warnings when using the DP
scheduler.  As I'm reading it, every time a DAI endpoint is faced with
an empty stream at copy time, it will warn.  But that's routine if the
data is inbound from an asynchronous DP component that will complete
next cycle instead.  This seems to be sensitive to pipeline cycle
time, and particularly has trouble with Google AEC which emits data in
10ms chunks vs. the 1ms LL scheduling cadence.

The upshot is that the deluge of warnings (it's a LOT of logging) end
up breaking the stream themselves after a second or two by inducing
glitches in data that is otherwise moving correctly.  Silence them.

Signed-off-by: Andy Ross <[email protected]>

src/audio/dai-zephyr.c

@@ -1286,8 +1286,9 @@ int dai_zephyr_multi_endpoint_copy(struct dai_data **dd, struct comp_dev *dev,
 
 	/* return if nothing to copy */
 	if (!frames) {
+#ifndef CONFIG_ZEPHYR_DP_SCHEDULER
 		comp_warn(dev, "dai_zephyr_multi_endpoint_copy(): nothing to copy");
-
+#endif
 		for (i = 0; i < num_endpoints; i++) {
 			ret = dma_reload(dd[i]->chan->dma->z_dev, dd[i]->chan->index, 0, 0, 0);
 			if (ret < 0) {
@@ -1461,6 +1462,7 @@ int dai_common_copy(struct dai_data *dd, struct comp_dev *dev, pcm_converter_fun
 		 dev->direction, copy_bytes);
 
 	/* Check possibility of glitch occurrence */
+#ifndef CONFIG_ZEPHYR_DP_SCHEDULER
 	if (dev->direction == SOF_IPC_STREAM_PLAYBACK &&
 	    copy_bytes + avail_bytes < dd->period_bytes)
 		comp_warn(dev, "dai_common_copy(): Copy_bytes %d + avail bytes %d < period bytes %d, possible glitch",
@@ -1469,10 +1471,13 @@ int dai_common_copy(struct dai_data *dd, struct comp_dev *dev, pcm_converter_fun
 		 copy_bytes + free_bytes < dd->period_bytes)
 		comp_warn(dev, "dai_common_copy(): Copy_bytes %d + free bytes %d < period bytes %d, possible glitch",
 			  copy_bytes, free_bytes, dd->period_bytes);
+#endif
 
 	/* return if nothing to copy */
 	if (!copy_bytes) {
+#ifndef CONFIG_ZEPHYR_DP_SCHEDULER
 		comp_warn(dev, "dai_zephyr_copy(): nothing to copy");
+#endif
 		dma_reload(dd->chan->dma->z_dev, dd->chan->index, 0, 0, 0);
 		return 0;
 	}