dai: use ibs/obs for dma buffer size calculation

Use ibs/obs size from ipc4_base_module_cfg to properly calculate
period_count. It is especially important when FW aggregation mode
is enabled and there are multiple DMAs allocated under one copier
instance. That way period count for every DMA will be correctly
evaluated and used for DMA buffer size calculation.

Signed-off-by: Ievgen Ganakov <ievgen.ganakov@intel.com>

src/audio/dai-zephyr.c

@@ -848,12 +848,38 @@ static int dai_set_dma_buffer(struct dai_data *dd, struct comp_dev *dev,
 
 	/* calculate DMA buffer size */
 	period_count = dd->dma->plat_data.period_count;
+
+#if CONFIG_IPC_MAJOR_4
+	/* Use ibs/obs from copier gtw config to calculate DMA buffer length in ms.
+	 * This is used to calculate correct period count value.
+	 * It is especially important for FW aggregation use case, when Copier
+	 * receives whole DMA buffer size in GTW config but should be able to
+	 * allocate multiple DMA's implicitly.
+	 * E.g. if dma_buffer_size received in Copier GTW config is 7680 bytes and FW
+	 * should aggregate two streams 1ch/24_32bit/48kHz and 3ch/24_32bit/48kHz into one
+	 * 4ch/24_32bit/48kHz stream, then FW will have to allocate two DMA's with sizes
+	 * 1920 and 5760 bytes respectively and same 10 ms length (period_count) for both
+	 * to avoid glitches.
+	 */
+	struct ipc4_copier_module_cfg *copier_cfg = dd->dai_spec_config;
+	uint32_t dma_buff_length_ms;
+
+	if (dev->direction == SOF_IPC_STREAM_CAPTURE)
+		dma_buff_length_ms = dd->ipc_config.dma_buffer_size / copier_cfg->base.ibs;
+	else
+		dma_buff_length_ms = dd->ipc_config.dma_buffer_size / copier_cfg->base.obs;
+
+	period_count = MAX(period_count, dma_buff_length_ms);
+#else
+	period_count = MAX(period_count,
+			   SOF_DIV_ROUND_UP(dd->ipc_config.dma_buffer_size, period_bytes));
+#endif /* CONFIG_IPC_MAJOR_4 */
+
 	if (!period_count) {
 		comp_err(dev, "dai_set_dma_buffer(): no valid dma buffer period count");
 		return -EINVAL;
 	}
-	period_count = MAX(period_count,
-			   SOF_DIV_ROUND_UP(dd->ipc_config.dma_buffer_size, period_bytes));
+
 	buffer_size = ALIGN_UP(period_count * period_bytes, align);
 	*pc = period_count;