1e224f322b
Fix underruns by using dma to copy 1st to sram in a ping/pong buffer style and then copying from the sram to the ASP. This also has the advantage of tolerating very long interrupt latency on dma completion. Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
34 lines
888 B
C
34 lines
888 B
C
/*
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* ALSA PCM interface for the TI DAVINCI processor
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*
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* Author: Vladimir Barinov, <vbarinov@embeddedalley.com>
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* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _DAVINCI_PCM_H
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#define _DAVINCI_PCM_H
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#include <mach/edma.h>
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#include <mach/asp.h>
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struct davinci_pcm_dma_params {
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int channel; /* sync dma channel ID */
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unsigned short acnt;
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dma_addr_t dma_addr; /* device physical address for DMA */
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unsigned sram_size;
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enum dma_event_q eventq_no; /* event queue number */
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unsigned char data_type; /* xfer data type */
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unsigned char convert_mono_stereo;
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unsigned int fifo_level;
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};
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extern struct snd_soc_platform davinci_soc_platform;
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#endif
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