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authorPeter Ujfalusi <peter.ujfalusi@ti.com>2013-07-11 14:35:43 +0200
committerMark Brown <broonie@linaro.org>2013-07-11 17:37:44 +0100
commitf6becf0b2ffef0bed813d7f910b5d276c5dc45e1 (patch)
tree379feabda5b68f0174c4506d76480398ce4e8bac /sound
parent84bbc4aa2de97143db0f6ef0c3fa0bd84f73b207 (diff)
downloadlinux-next-f6becf0b2ffef0bed813d7f910b5d276c5dc45e1.tar.gz
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/omap/omap-pcm.c17
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,