p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

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>
This commit is contained in:
Kuninori Morimoto 2014-06-22 17:59:02 -07:00 committed by Mark Brown
parent 3752303485
commit 340371005d
2 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sound/soc/sh/rcar/core.c
View File

@ -200,6 +200,7 @@ void rsnd_dma_start(struct rsnd_dma *dma)
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 @@ int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
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;

1
sound/soc/sh/rcar/rsnd.h
View File

@ -158,6 +158,7 @@ struct rsnd_dma {
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);