audio: host-zephyr: Do not track 'no bytes to copy' in case of FAST_MODE

In FAST_MODE the host DMA is not paced with the period size and can copy
more data once to do no copying for a other periods.
In other words: in FAST_MODE the host is not running in stream mode, but
in batch mode.
Printing warnings in this does not make sense and just fills up the
firmware log.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>

Author: ujfalusi

src/audio/host-zephyr.c

@@ -478,27 +478,30 @@ static uint32_t host_get_copy_bytes_normal(struct host_data *hd, struct comp_dev
 	 * in order to avoid high load spike
 	 * if FAST_MODE is enabled, then one period limitation is omitted
 	 */
-	if (!(hd->ipc_host.feature_mask & BIT(IPC4_COPIER_FAST_MODE)))
-		dma_copy_bytes = MIN(hd->period_bytes, dma_copy_bytes);
-
-	const uint64_t now = k_uptime_get();
-	const uint64_t delta = now - hd->nobytes_last_logged;
-	const bool reset_skipped = delta > SOF_MIN_NO_BYTES_INTERVAL_MS;
+	if (!(hd->ipc_host.feature_mask & BIT(IPC4_COPIER_FAST_MODE))) {
+		const uint64_t now = k_uptime_get();
+		const uint64_t delta = now - hd->nobytes_last_logged;
+		const bool reset_skipped = delta > SOF_MIN_NO_BYTES_INTERVAL_MS;
 
-	if (hd->n_skipped > 1 && (dma_copy_bytes || reset_skipped)) {
-		comp_warn(dev, "Skipped %u no-bytes events in last %llu ms, bytes %u",
-			  hd->n_skipped - 1, delta, dma_copy_bytes);
-		hd->n_skipped = 0;
-	}
+		dma_copy_bytes = MIN(hd->period_bytes, dma_copy_bytes);
 
-	if (!dma_copy_bytes) {
-		if (!hd->n_skipped || reset_skipped) {
-			hd->nobytes_last_logged = now;
+		if (hd->n_skipped > 1 && (dma_copy_bytes || reset_skipped)) {
+			comp_warn(dev,
+				  "Skipped %u no-bytes events in last %llu ms, bytes %u",
+				  hd->n_skipped - 1, delta, dma_copy_bytes);
 			hd->n_skipped = 0;
-			comp_warn(dev, "no bytes to copy, available samples: %u, free_samples: %u",
-				  avail_samples, free_samples);
 		}
-		hd->n_skipped++;
+
+		if (!dma_copy_bytes) {
+			if (!hd->n_skipped || reset_skipped) {
+				hd->nobytes_last_logged = now;
+				hd->n_skipped = 0;
+				comp_warn(dev,
+					  "no bytes to copy, available samples: %u, free_samples: %u",
+					  avail_samples, free_samples);
+			}
+			hd->n_skipped++;
+		}
 	}
 
 	/* dma_copy_bytes should be aligned to minimum possible chunk of