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ASoC: OMAP: data_type and sync_mode configurable in audio dma 

Allow client drivers to set the data_type (16, 32) and the
sync_mode (element, packet, etc) of the audio dma transferences.

McBSP dai driver configures it for a data type of 16 bits and
element sync mode.

Signed-off-by: Misael Lopez Cruz <x0052729@ti.com>
Signed-off-by: Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Misael Lopez Cruz 2010-02-22 15:09:19 -06:00 committed by Mark Brown
parent b9dd94a87e
commit e17dd32f34
3 changed files with 13 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sound/soc/omap/omap-mcbsp.c
View File

@ -287,6 +287,8 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
omap_mcbsp_dai_dma_params[id][substream->stream].dma_req = dma;
omap_mcbsp_dai_dma_params[id][substream->stream].port_addr = port;
omap_mcbsp_dai_dma_params[id][substream->stream].sync_mode = sync_mode;
omap_mcbsp_dai_dma_params[id][substream->stream].data_type =
OMAP_DMA_DATA_TYPE_S16;
cpu_dai->dma_data = &omap_mcbsp_dai_dma_params[id][substream->stream];
if (mcbsp_data->configured) {

15
sound/soc/omap/omap-pcm.c
View File

@ -37,7 +37,8 @@ static const struct snd_pcm_hardware omap_pcm_hardware = {
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S32_LE,
.period_bytes_min = 32,
.period_bytes_max = 64 * 1024,
.periods_min = 2,
@ -149,6 +150,7 @@ static int omap_pcm_prepare(struct snd_pcm_substream *substream)
struct omap_runtime_data *prtd = runtime->private_data;
struct omap_pcm_dma_data *dma_data = prtd->dma_data;
struct omap_dma_channel_params dma_params;
int bytes;
/* return if this is a bufferless transfer e.g.
* codec <--> BT codec or GSM modem -- lg FIXME */
@ -156,11 +158,7 @@ static int omap_pcm_prepare(struct snd_pcm_substream *substream)
return 0;
memset(&dma_params, 0, sizeof(dma_params));
/*
* Note: Regardless of interface data formats supported by OMAP McBSP
* or EAC blocks, internal representation is always fixed 16-bit/sample
*/
dma_params.data_type = OMAP_DMA_DATA_TYPE_S16;
dma_params.data_type = dma_data->data_type;
dma_params.trigger = dma_data->dma_req;
dma_params.sync_mode = dma_data->sync_mode;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
@ -170,6 +168,7 @@ static int omap_pcm_prepare(struct snd_pcm_substream *substream)
dma_params.src_start = runtime->dma_addr;
dma_params.dst_start = dma_data->port_addr;
dma_params.dst_port = OMAP_DMA_PORT_MPUI;
dma_params.dst_fi = dma_data->packet_size;
} else {
dma_params.src_amode = OMAP_DMA_AMODE_CONSTANT;
dma_params.dst_amode = OMAP_DMA_AMODE_POST_INC;
@ -177,6 +176,7 @@ static int omap_pcm_prepare(struct snd_pcm_substream *substream)
dma_params.src_start = dma_data->port_addr;
dma_params.dst_start = runtime->dma_addr;
dma_params.src_port = OMAP_DMA_PORT_MPUI;
dma_params.src_fi = dma_data->packet_size;
}
/*
* Set DMA transfer frame size equal to ALSA period size and frame
@ -184,7 +184,8 @@ static int omap_pcm_prepare(struct snd_pcm_substream *substream)
* we can transfer the whole ALSA buffer with single DMA transfer but
* still can get an interrupt at each period bounary
*/
dma_params.elem_count = snd_pcm_lib_period_bytes(substream) / 2;
bytes = snd_pcm_lib_period_bytes(substream);
dma_params.elem_count = bytes >> dma_data->data_type;
dma_params.frame_count = runtime->periods;
omap_set_dma_params(prtd->dma_ch, &dma_params);

4
sound/soc/omap/omap-pcm.h
View File

@ -29,8 +29,10 @@ 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);
int data_type; /* data type 8,16,32 */
int sync_mode; /* DMA sync mode */
int packet_size; /* packet size only in PACKET mode */
};
extern struct snd_soc_platform omap_soc_platform;