Commit 72c7b67a authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Vinod Koul

dmaengine: edma: Add support for DMA_PAUSE/RESUME operation

Pause/Resume can be used by the audio stack when the stream is paused/resumed
The edma platform code has support for this and the legacy audio stack used
this.
Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: default avatarJoel Fernandes <joelf@ti.com>
Reviewed-and-Tested-by: default avatarJoel Fernandes <joelf@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent b2b617de
...@@ -242,6 +242,26 @@ static int edma_slave_config(struct edma_chan *echan, ...@@ -242,6 +242,26 @@ static int edma_slave_config(struct edma_chan *echan,
return 0; return 0;
} }
static int edma_dma_pause(struct edma_chan *echan)
{
/* Pause/Resume only allowed with cyclic mode */
if (!echan->edesc->cyclic)
return -EINVAL;
edma_pause(echan->ch_num);
return 0;
}
static int edma_dma_resume(struct edma_chan *echan)
{
/* Pause/Resume only allowed with cyclic mode */
if (!echan->edesc->cyclic)
return -EINVAL;
edma_resume(echan->ch_num);
return 0;
}
static int edma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, static int edma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
unsigned long arg) unsigned long arg)
{ {
...@@ -257,6 +277,14 @@ static int edma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, ...@@ -257,6 +277,14 @@ static int edma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
config = (struct dma_slave_config *)arg; config = (struct dma_slave_config *)arg;
ret = edma_slave_config(echan, config); ret = edma_slave_config(echan, config);
break; break;
case DMA_PAUSE:
ret = edma_dma_pause(echan);
break;
case DMA_RESUME:
ret = edma_dma_resume(echan);
break;
default: default:
ret = -ENOSYS; ret = -ENOSYS;
} }
......
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