@@ -504,6 +504,22 @@ static irqreturn_t sun6i_dma_interrupt(int irq, void *dev_id)
return ret;
}
+static void sanitize_config(struct dma_slave_config *sconfig,
+ enum dma_transfer_direction direction)
+{
+ if (direction == DMA_MEM_TO_DEV) {
+ if (sconfig->src_addr_width == DMA_SLAVE_BUSWIDTH_UNDEFINED)
+ sconfig->src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ if (!sconfig->src_maxburst)
+ sconfig->src_maxburst = 8;
+ } else { // DMA_DEV_TO_MEM
+ if (sconfig->dst_addr_width == DMA_SLAVE_BUSWIDTH_UNDEFINED)
+ sconfig->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ if (!sconfig->dst_maxburst)
+ sconfig->dst_maxburst = 8;
+ }
+}
+
static struct dma_async_tx_descriptor *sun6i_dma_prep_dma_memcpy(
struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
size_t len, unsigned long flags)
@@ -585,6 +601,8 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_slave_sg(
if (!txd)
return NULL;
+ sanitize_config(sconfig, dir);
+
for_each_sg(sgl, sg, sg_len, i) {
v_lli = dma_pool_alloc(sdev->pool, GFP_NOWAIT, &p_lli);
if (!v_lli)
When defining the DMA transfer, the sound PCM DMA engine sets only the burst and bus width values of the device. This was making the audio transfers to be rejected because of invalid values on the memory side. Signed-off-by: Jean-Francois Moine <moinejf@free.fr> --- drivers/dma/sun6i-dma.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)