1 files changed, 35 insertions, 5 deletions

diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
index 485be42519b9..d86771abbf57 100644
--- a/arch/arm/common/edma.c
+++ b/arch/arm/common/edma.c
@@ -1414,15 +1414,43 @@ void edma_clear_event(unsigned channel)
 }
 EXPORT_SYMBOL(edma_clear_event);
 
+/*
+ * edma_assign_channel_eventq - move given channel to desired eventq
+ * Arguments:
+ *	channel - channel number
+ *	eventq_no - queue to move the channel
+ *
+ * Can be used to move a channel to a selected event queue.
+ */
+void edma_assign_channel_eventq(unsigned channel, enum dma_event_q eventq_no)
+{
+	unsigned ctlr;
+
+	ctlr = EDMA_CTLR(channel);
+	channel = EDMA_CHAN_SLOT(channel);
+
+	if (channel >= edma_cc[ctlr]->num_channels)
+		return;
+
+	/* default to low priority queue */
+	if (eventq_no == EVENTQ_DEFAULT)
+		eventq_no = edma_cc[ctlr]->default_queue;
+	if (eventq_no >= edma_cc[ctlr]->num_tc)
+		return;
+
+	map_dmach_queue(ctlr, channel, eventq_no);
+}
+EXPORT_SYMBOL(edma_assign_channel_eventq);
+
 static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata,
-			      struct edma *edma_cc)
+			      struct edma *edma_cc, int cc_id)
 {
 	int i;
 	u32 value, cccfg;
 	s8 (*queue_priority_map)[2];
 
 	/* Decode the eDMA3 configuration from CCCFG register */
-	cccfg = edma_read(0, EDMA_CCCFG);
+	cccfg = edma_read(cc_id, EDMA_CCCFG);
 
 	value = GET_NUM_REGN(cccfg);
 	edma_cc->num_region = BIT(value);
@@ -1436,7 +1464,8 @@ static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata,
 	value = GET_NUM_EVQUE(cccfg);
 	edma_cc->num_tc = value + 1;
 
-	dev_dbg(dev, "eDMA3 HW configuration (cccfg: 0x%08x):\n", cccfg);
+	dev_dbg(dev, "eDMA3 CC%d HW configuration (cccfg: 0x%08x):\n", cc_id,
+		cccfg);
 	dev_dbg(dev, "num_region: %u\n", edma_cc->num_region);
 	dev_dbg(dev, "num_channel: %u\n", edma_cc->num_channels);
 	dev_dbg(dev, "num_slot: %u\n", edma_cc->num_slots);
@@ -1470,7 +1499,8 @@ static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata,
 	queue_priority_map[i][1] = -1;
 
 	pdata->queue_priority_mapping = queue_priority_map;
-	pdata->default_queue = 0;
+	/* Default queue has the lowest priority */
+	pdata->default_queue = i - 1;
 
 	return 0;
 }
@@ -1655,7 +1685,7 @@ static int edma_probe(struct platform_device *pdev)
 			return -ENOMEM;
 
 		/* Get eDMA3 configuration from IP */
-		ret = edma_setup_from_hw(dev, info[j], edma_cc[j]);
+		ret = edma_setup_from_hw(dev, info[j], edma_cc[j], j);
 		if (ret)
 			return ret;