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ASoC: OMAP: Add checking to detect bufferless pcms

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Add checking in hw_params and prepare to detect bufferless pcms(i.e. BT
<--> codec).

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Joonyoung Shim 2009-04-22 10:56:50 +09:00 committed by Mark Brown
parent b75576d76d
commit 1b4246a1fc
1 changed files with 8 additions and 1 deletions
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9
sound/soc/omap/omap-pcm.c
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@ -87,8 +87,10 @@ static int omap_pcm_hw_params(struct snd_pcm_substream *substream,
struct omap_pcm_dma_data *dma_data = rtd->dai->cpu_dai->dma_data; struct omap_pcm_dma_data *dma_data = rtd->dai->cpu_dai->dma_data;
int err = 0; int err = 0;
/* return if this is a bufferless transfer e.g.
* codec <--> BT codec or GSM modem -- lg FIXME */
if (!dma_data) if (!dma_data)
return -ENODEV; return 0;
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
runtime->dma_bytes = params_buffer_bytes(params); runtime->dma_bytes = params_buffer_bytes(params);
@ -134,6 +136,11 @@ static int omap_pcm_prepare(struct snd_pcm_substream *substream)
struct omap_pcm_dma_data *dma_data = prtd->dma_data; struct omap_pcm_dma_data *dma_data = prtd->dma_data;
struct omap_dma_channel_params dma_params; struct omap_dma_channel_params dma_params;
/* return if this is a bufferless transfer e.g.
* codec <--> BT codec or GSM modem -- lg FIXME */
if (!prtd->dma_data)
return 0;
memset(&dma_params, 0, sizeof(dma_params)); memset(&dma_params, 0, sizeof(dma_params));
/* /*
* Note: Regardless of interface data formats supported by OMAP McBSP * Note: Regardless of interface data formats supported by OMAP McBSP