mirror of
https://github.com/adulau/aha.git
synced 2024-12-30 20:56:23 +00:00
caebc0cb3b
This patch changes the way DMA is done in omap-pcm.c in order to reduce power consumption. There is no need to have so much SW control in order to have DMA in idle state during audio streaming. Configuring McBSP threshold value and DMA to FRAME_SYNC are sufficient. Signed-off-by: Eduardo Valentin <eduardo.valentin@nokia.com> Acked-by: Jarkko Nikula <jhnikula@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
/*
|
|
* omap-pcm.h
|
|
*
|
|
* Copyright (C) 2008 Nokia Corporation
|
|
*
|
|
* Contact: Jarkko Nikula <jhnikula@gmail.com>
|
|
* Peter Ujfalusi <peter.ujfalusi@nokia.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#ifndef __OMAP_PCM_H__
|
|
#define __OMAP_PCM_H__
|
|
|
|
struct omap_pcm_dma_data {
|
|
char *name; /* stream identifier */
|
|
int dma_req; /* DMA request line */
|
|
unsigned long port_addr; /* transmit/receive register */
|
|
int sync_mode; /* DMA sync mode */
|
|
void (*set_threshold)(struct snd_pcm_substream *substream);
|
|
};
|
|
|
|
extern struct snd_soc_platform omap_soc_platform;
|
|
|
|
#endif
|