ASoC: rsnd: DMA start address is properly used for each DMAC
R-Car sound uses Audio DMAC and Audio DMAC peri peri.
Audio DMAC peri peri transfers data inside circuit.
DMA transfer needs source / destination address,
and destination address can be set via dmaengine_slave_config().
The source address can be set when starting DMAEngine.
Because Audio DMAC peri peri always ignores its value,
current driver always used same source address for
Audio DMAC / Audio DMAC peri peri
(Audio DMAC peri peri source / destination address
is always fixed value)
But, This is not good match for DT booting.
This patch properly uses DMA start address
for Audio DMAC / Audio DMAC peri peri.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index 4435a31e..49d9b31 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -200,6 +200,7 @@
struct dma_async_tx_descriptor *desc;
desc = dmaengine_prep_dma_cyclic(dma->chan,
+ (dma->addr) ? dma->addr :
substream->runtime->dma_addr,
snd_pcm_lib_buffer_bytes(substream),
snd_pcm_lib_period_bytes(substream),
@@ -347,6 +348,7 @@
if (ret < 0)
goto rsnd_dma_init_err;
+ dma->addr = is_play ? cfg.src_addr : cfg.dst_addr;
dma->dir = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
return 0;
diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h
index 425b22e..631b149 100644
--- a/sound/soc/sh/rcar/rsnd.h
+++ b/sound/soc/sh/rcar/rsnd.h
@@ -158,6 +158,7 @@
struct sh_dmae_slave slave;
struct dma_chan *chan;
enum dma_transfer_direction dir;
+ dma_addr_t addr;
};
void rsnd_dma_start(struct rsnd_dma *dma);
