diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index 0a9c052d437c..1c4521283fa9 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -37,24 +37,6 @@
  * support descriptor writeback.
  */
 
-static inline bool is_request_line_unset(struct dw_dma_chan *dwc)
-{
-	return dwc->request_line == (typeof(dwc->request_line))~0;
-}
-
-static inline void dwc_set_masters(struct dw_dma_chan *dwc)
-{
-	struct dw_dma *dw = to_dw_dma(dwc->chan.device);
-	struct dw_dma_slave *dws = dwc->chan.private;
-	unsigned char mmax = dw->nr_masters - 1;
-
-	if (!is_request_line_unset(dwc))
-		return;
-
-	dwc->src_master = min_t(unsigned char, mmax, dwc_get_sms(dws));
-	dwc->dst_master = min_t(unsigned char, mmax, dwc_get_dms(dws));
-}
-
 #define DWC_DEFAULT_CTLLO(_chan) ({				\
 		struct dw_dma_chan *_dwc = to_dw_dma_chan(_chan);	\
 		struct dma_slave_config	*_sconfig = &_dwc->dma_sconfig;	\
@@ -158,10 +140,8 @@ static void dwc_initialize(struct dw_dma_chan *dwc)
 		cfghi |= DWC_CFGH_DST_PER(dws->dst_id);
 		cfghi |= DWC_CFGH_SRC_PER(dws->src_id);
 	} else {
-		if (dwc->direction == DMA_MEM_TO_DEV)
-			cfghi = DWC_CFGH_DST_PER(dwc->request_line);
-		else if (dwc->direction == DMA_DEV_TO_MEM)
-			cfghi = DWC_CFGH_SRC_PER(dwc->request_line);
+		cfghi |= DWC_CFGH_DST_PER(dwc->dst_id);
+		cfghi |= DWC_CFGH_SRC_PER(dwc->src_id);
 	}
 
 	channel_writel(dwc, CFG_LO, cfglo);
@@ -967,10 +947,6 @@ set_runtime_config(struct dma_chan *chan, struct dma_slave_config *sconfig)
 	memcpy(&dwc->dma_sconfig, sconfig, sizeof(*sconfig));
 	dwc->direction = sconfig->direction;
 
-	/* Take the request line from slave_id member */
-	if (is_request_line_unset(dwc))
-		dwc->request_line = sconfig->slave_id;
-
 	convert_burst(&dwc->dma_sconfig.src_maxburst);
 	convert_burst(&dwc->dma_sconfig.dst_maxburst);
 
@@ -1123,8 +1099,6 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan)
 	 * doesn't mean what you think it means), and status writeback.
 	 */
 
-	dwc_set_masters(dwc);
-
 	spin_lock_irqsave(&dwc->lock, flags);
 	i = dwc->descs_allocated;
 	while (dwc->descs_allocated < NR_DESCS_PER_CHANNEL) {
@@ -1182,7 +1156,6 @@ static void dwc_free_chan_resources(struct dma_chan *chan)
 	list_splice_init(&dwc->free_list, &list);
 	dwc->descs_allocated = 0;
 	dwc->initialized = false;
-	dwc->request_line = ~0;
 
 	/* Disable interrupts */
 	channel_clear_bit(dw, MASK.XFER, dwc->mask);
@@ -1604,7 +1577,6 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
 		channel_clear_bit(dw, CH_EN, dwc->mask);
 
 		dwc->direction = DMA_TRANS_NONE;
-		dwc->request_line = ~0;
 
 		/* Hardware configuration */
 		if (autocfg) {
diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c
index c5b339af6be5..7aa3cd33fdec 100644
--- a/drivers/dma/dw/platform.c
+++ b/drivers/dma/dw/platform.c
@@ -41,7 +41,8 @@ static bool dw_dma_of_filter(struct dma_chan *chan, void *param)
 	if (chan->device != &fargs->dw->dma)
 		return false;
 
-	dwc->request_line = fargs->req;
+	dwc->src_id = fargs->req;
+	dwc->dst_id = fargs->req;
 	dwc->src_master	= fargs->src;
 	dwc->dst_master	= fargs->dst;
 
@@ -86,7 +87,8 @@ static bool dw_dma_acpi_filter(struct dma_chan *chan, void *param)
 	    chan->chan_id != dma_spec->chan_id)
 		return false;
 
-	dwc->request_line = dma_spec->slave_id;
+	dwc->src_id = dma_spec->slave_id;
+	dwc->dst_id = dma_spec->slave_id;
 	dwc->src_master = dwc_get_sms(NULL);
 	dwc->dst_master = dwc_get_dms(NULL);
 
diff --git a/drivers/dma/dw/regs.h b/drivers/dma/dw/regs.h
index af02439155e9..0e82d9972c17 100644
--- a/drivers/dma/dw/regs.h
+++ b/drivers/dma/dw/regs.h
@@ -221,9 +221,10 @@ struct dw_dma_chan {
 	bool			nollp;
 
 	/* custom slave configuration */
-	unsigned int		request_line;
-	unsigned char		src_master;
-	unsigned char		dst_master;
+	u8			src_id;
+	u8			dst_id;
+	u8			src_master;
+	u8			dst_master;
 
 	/* configuration passed via DMA_SLAVE_CONFIG */
 	struct dma_slave_config dma_sconfig;