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ARM: davinci: map default_queue to edma channels 

Default queue is expected to be a low-priority queue.
This way, long transfers on the default queue started
by the codec engine will not cause audio defects.

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Juha Kuikka <juha.kuikka@gmail.com>
Reported-by: Juha Kuikka <juha.kuikka@gmail.com>
Acked-by: Rajashekhara, Sudhakar <sudhakar.raj@ti.com>
Cc: linux-mmc@vger.kernel.org
Cc: davinci-linux-open-source@linux.davincidsp.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: Rajashekhara, Sudhakar <sudhakar.raj@ti.com>
Cc: Ido Yariv <ido@wizery.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Sergei Shtylyov <sshtylyov@mvista.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This commit is contained in:
Heiko Schocher 2012-01-19 08:05:21 +01:00 committed by Sekhar Nori
parent 62aa2b537c
commit 0b7580ba9d
2 changed files with 6 additions and 5 deletions
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6
arch/arm/mach-davinci/dma.c
View File

@ -1508,12 +1508,8 @@ static int __init edma_probe(struct platform_device *pdev)
goto fail;
}
/* Everything lives on transfer controller 1 until otherwise
* specified. This way, long transfers on the low priority queue
* started by the codec engine will not cause audio defects.
*/
for (i = 0; i < edma_cc[j]->num_channels; i++)
map_dmach_queue(j, i, EVENTQ_1);
map_dmach_queue(j, i, info[j]->default_queue);
queue_tc_mapping = info[j]->queue_tc_mapping;
queue_priority_mapping = info[j]->queue_priority_mapping;

5
arch/arm/mach-davinci/include/mach/edma.h
View File

@ -250,6 +250,11 @@ struct edma_soc_info {
unsigned n_slot;
unsigned n_tc;
unsigned n_cc;
/*
* Default queue is expected to be a low-priority queue.
* This way, long transfers on the default queue started
* by the codec engine will not cause audio defects.
*/
enum dma_event_q default_queue;
/* Resource reservation for other cores */