DaVinci: EDMA: Updating default queue handling

EDMA queues in DM365 are a little different than those
on other DaVinci's. On DM365 Q0 and Q1 have the larger
FIFO size. We want Q0 and Q1 to be used by codecs and
DVSDK demos.
MMC driver is the only driver which uses the flag
'EVENTQ_DEFAULT'. So MMC driver should be using Q2 instead of
Q1 on DM365.
This patch allows us to declare a "default queue" from
SOC specific code. If it is not declared then the EDMA
driver assumes a default of queue 1.
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-davinci/dm365.c

@@ -741,6 +741,7 @@ static struct edma_soc_info dm365_edma_info[] = {
 		.n_cc			= 1,
 		.queue_tc_mapping	= dm365_queue_tc_mapping,
 		.queue_priority_mapping	= dm365_queue_priority_mapping,
+		.default_queue		= EVENTQ_2,
 	},
 };
 

arch/arm/mach-davinci/dma.c

@@ -225,6 +225,7 @@ struct edma {
 	unsigned	num_slots;
 	unsigned	num_tc;
 	unsigned	num_cc;
+	enum dma_event_q 	default_queue;
 
 	/* list of channels with no even trigger; terminated by "-1" */
 	const s8	*noevent;
@@ -267,7 +268,7 @@ static void map_dmach_queue(unsigned ctlr, unsigned ch_no,
 
 	/* default to low priority queue */
 	if (queue_no == EVENTQ_DEFAULT)
-		queue_no = EVENTQ_1;
+		queue_no = edma_info[ctlr]->default_queue;
 
 	queue_no &= 7;
 	edma_modify_array(ctlr, EDMA_DMAQNUM, (ch_no >> 3),
@@ -1249,6 +1250,10 @@ static int __init edma_probe(struct platform_device *pdev)
 		edma_info[j]->num_cc = min_t(unsigned, info[j].n_cc,
 							EDMA_MAX_CC);
 
+		edma_info[j]->default_queue = info[j].default_queue;
+		if (!edma_info[j]->default_queue)
+			edma_info[j]->default_queue = EVENTQ_1;
+
 		dev_dbg(&pdev->dev, "DMA REG BASE ADDR=%p\n",
 			edmacc_regs_base[j]);
 

arch/arm/mach-davinci/include/mach/edma.h

@@ -271,6 +271,7 @@ struct edma_soc_info {
 	unsigned	n_slot;
 	unsigned	n_tc;
 	unsigned	n_cc;
+	enum dma_event_q	default_queue;
 
 	/* list of channels with no even trigger; terminated by "-1" */
 	const s8	*noevent;