From f6becf0b2ffef0bed813d7f910b5d276c5dc45e1 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Thu, 11 Jul 2013 14:35:43 +0200 Subject: [PATCH] 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 Reviewed-by: Lars-Peter Clausen Signed-off-by: Mark Brown --- sound/soc/omap/omap-pcm.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/sound/soc/omap/omap-pcm.c b/sound/soc/omap/omap-pcm.c index c28e042..a11405d 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, -- 2.7.4