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Commit eb3fe7de authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Vinod Koul
Browse files

ARM: edma: Add edma_assign_channel_eventq() to move channel to a give queue 



In some cases it is desired to move a channel to a specific event queue.
Such a use case is audio, where it is preferred that it is served with
highest priority compared to other DMA clients.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: default avatarSekhar Nori <nsekhar@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 85a70762

arch/arm/common/edma.c

+28 −0
Original line number Original line Diff line number Diff line
@@ -1414,6 +1414,34 @@ void edma_clear_event(unsigned channel) 
}

}

EXPORT_SYMBOL(edma_clear_event);

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,

static int edma_setup_from_hw(struct device *dev, struct edma_soc_info *pdata,

			      struct edma *edma_cc)

			      struct edma *edma_cc)

{

{

include/linux/platform_data/edma.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -150,6 +150,8 @@ void edma_clear_event(unsigned channel); 
void edma_pause(unsigned channel);

void edma_pause(unsigned channel);

void edma_resume(unsigned channel);

void edma_resume(unsigned channel);





void edma_assign_channel_eventq(unsigned channel, enum dma_event_q eventq_no);



struct edma_rsv_info {

struct edma_rsv_info {





	const s16	(*rsv_chans)[2];

	const s16	(*rsv_chans)[2];