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| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2013-07-11 14:35:43 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-07-11 17:37:44 +0100 |
| commit | f6becf0b2ffef0bed813d7f910b5d276c5dc45e1 (patch) | |
| tree | 379feabda5b68f0174c4506d76480398ce4e8bac | |
| parent | 84bbc4aa2de97143db0f6ef0c3fa0bd84f73b207 (diff) | |
| download | linux-f6becf0b2ffef0bed813d7f910b5d276c5dc45e1.tar.gz linux-f6becf0b2ffef0bed813d7f910b5d276c5dc45e1.tar.bz2 linux-f6becf0b2ffef0bed813d7f910b5d276c5dc45e1.zip | |
ASoC: omap-pcm: Request the DMA channel differently when DT is involved
When booting with DT the platform_get_resource_byname() is not available to
get the DMA resource. In this case the DAI drivers will set the filter_data to
the name of the DMA and omap-pcm can use this to request the DMA channel.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
| -rw-r--r-- | sound/soc/omap/omap-pcm.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/sound/soc/omap/omap-pcm.c b/sound/soc/omap/omap-pcm.c index c28e042f2208..a11405de86e8 100644 --- a/sound/soc/omap/omap-pcm.c +++ b/sound/soc/omap/omap-pcm.c @@ -113,14 +113,25 @@ static int omap_pcm_open(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_dmaengine_dai_dma_data *dma_data; + int ret; snd_soc_set_runtime_hwparams(substream, &omap_pcm_hardware); dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); - return snd_dmaengine_pcm_open_request_chan(substream, - omap_dma_filter_fn, - dma_data->filter_data); + /* DT boot: filter_data is the DMA name */ + if (rtd->cpu_dai->dev->of_node) { + struct dma_chan *chan; + + chan = dma_request_slave_channel(rtd->cpu_dai->dev, + dma_data->filter_data); + ret = snd_dmaengine_pcm_open(substream, chan); + } else { + ret = snd_dmaengine_pcm_open_request_chan(substream, + omap_dma_filter_fn, + dma_data->filter_data); + } + return ret; } static int omap_pcm_mmap(struct snd_pcm_substream *substream, |