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authorMark Brown <broonie@linaro.org>2013-10-19 17:43:51 +0100
committerMark Brown <broonie@linaro.org>2013-10-24 09:52:14 +0100
commitea73b7ddf13548afd666373dc5e26ee7c812a3fe (patch)
treeee450969a1f904da0d13144edb22bef186bf07f0 /include/sound/dmaengine_pcm.h
parent0eef5381b7271702c7e65c637cb46804c482a90a (diff)
downloadop-kernel-dev-ea73b7ddf13548afd666373dc5e26ee7c812a3fe.zip
op-kernel-dev-ea73b7ddf13548afd666373dc5e26ee7c812a3fe.tar.gz
ASoC: dmaengine: Support custom channel names
Some devices have more than just simple TX and RX DMA channels, for example modern Samsung I2S IPs support a secondary transmit DMA stream which is mixed into the primary stream during playback. Allow such devices to specify the names of the channels to be requested in their dma_data. Signed-off-by: Mark Brown <broonie@linaro.org> Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Diffstat (limited to 'include/sound/dmaengine_pcm.h')
-rw-r--r--include/sound/dmaengine_pcm.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h
index 83b2c3e..1501731 100644
--- a/include/sound/dmaengine_pcm.h
+++ b/include/sound/dmaengine_pcm.h
@@ -61,6 +61,7 @@ struct dma_chan *snd_dmaengine_pcm_get_chan(struct snd_pcm_substream *substream)
* @slave_id: Slave requester id for the DMA channel.
* @filter_data: Custom DMA channel filter data, this will usually be used when
* requesting the DMA channel.
+ * @chan_name: Custom channel name to use when requesting DMA channel.
* @fifo_size: FIFO size of the DAI controller in bytes
*/
struct snd_dmaengine_dai_dma_data {
@@ -69,6 +70,7 @@ struct snd_dmaengine_dai_dma_data {
u32 maxburst;
unsigned int slave_id;
void *filter_data;
+ const char *chan_name;
unsigned int fifo_size;
};
@@ -98,6 +100,10 @@ void snd_dmaengine_pcm_set_config_from_dai_data(
* playback.
*/
#define SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX BIT(3)
+/*
+ * The PCM streams have custom channel names specified.
+ */
+#define SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME BIT(4)
/**
* struct snd_dmaengine_pcm_config - Configuration data for dmaengine based PCM
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