On Fri, 2012-06-22 at 17:12 +0530, Laxman Dewangan wrote: > Tegra's APB DMA driver support the cyclic mode of data > transfer and hence setting the DMA_CYCLIC caps for dma > channels. > > This is require when generic sound dmaengine pcm driver > request for dma channel with CYCLIC capability. > > Signed-off-by: Laxman Dewangan <[email protected]> > --- > drivers/dma/tegra20-apb-dma.c | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c > index 134ea7c..b4bd50c 100644 > --- a/drivers/dma/tegra20-apb-dma.c > +++ b/drivers/dma/tegra20-apb-dma.c > @@ -1306,6 +1306,8 @@ static int __devinit tegra_dma_probe(struct > platform_device *pdev) > > dma_cap_set(DMA_SLAVE, tdma->dma_dev.cap_mask); > dma_cap_set(DMA_PRIVATE, tdma->dma_dev.cap_mask); > + dma_cap_set(DMA_CYCLIC, tdma->dma_dev.cap_mask); > + > tdma->dma_dev.dev = &pdev->dev; > tdma->dma_dev.device_alloc_chan_resources = > tegra_dma_alloc_chan_resources; What sort of testing went into this. I can see that you are marking descriptor complete even for cyclic case, that is wrong you should fix that as well. See the other drivers for cyclic handling of descriptors.
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