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ALSA: Restore support for DMAless DAIs on PXA

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Used for applications such as direct bluetooth connections on
smartphones which don't go via the CPU. This used to be supported
before the refactoring to share code but this check was removed
during that move.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2009-08-19 19:31:46 +01:00
parent 474e09ca01
commit f8bae4caaa
1 changed files with 3 additions and 0 deletions
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3
sound/arm/pxa2xx-pcm-lib.c
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@ -136,6 +136,9 @@ int __pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
{ {
struct pxa2xx_runtime_data *prtd = substream->runtime->private_data; struct pxa2xx_runtime_data *prtd = substream->runtime->private_data;
if (!prtd || !prtd->params)
return 0;
DCSR(prtd->dma_ch) &= ~DCSR_RUN; DCSR(prtd->dma_ch) &= ~DCSR_RUN;
DCSR(prtd->dma_ch) = 0; DCSR(prtd->dma_ch) = 0;
DCMD(prtd->dma_ch) = 0; DCMD(prtd->dma_ch) = 0;