diff options
| author | Kuninori Morimoto | 2013-07-29 03:59:12 +0200 |
|---|---|---|
| committer | Mark Brown | 2013-08-06 18:56:13 +0200 |
| commit | 374a528111fa07878090bd9694a3e153814de39c (patch) | |
| tree | a9af99a7d5a419f7ee7d92b4205e8274a731c566 /sound/soc/sh/rcar/ssi.c | |
| parent | ASoC: rsnd: SSI supports DMA transfer (diff) | |
| download | kernel-qcow2-linux-374a528111fa07878090bd9694a3e153814de39c.tar.gz kernel-qcow2-linux-374a528111fa07878090bd9694a3e153814de39c.tar.xz kernel-qcow2-linux-374a528111fa07878090bd9694a3e153814de39c.zip | |
ASoC: rsnd: SSI supports DMA transfer via BUSIF
This patch adds BUSIF support for R-Car sound DMAEngine transfer.
The sound data will be transferred via FIFO which can cover blank time
which will happen when DMA channel is switching.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/sh/rcar/ssi.c')
| -rw-r--r-- | sound/soc/sh/rcar/ssi.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c index 2079ccf5f322..fae26d3f79d2 100644 --- a/sound/soc/sh/rcar/ssi.c +++ b/sound/soc/sh/rcar/ssi.c @@ -104,6 +104,7 @@ struct rsnd_ssiu { static void rsnd_ssi_mode_init(struct rsnd_priv *priv, struct rsnd_ssiu *ssiu) { + struct device *dev = rsnd_priv_to_dev(priv); struct rsnd_ssi *ssi; u32 flags; u32 val; @@ -113,8 +114,17 @@ static void rsnd_ssi_mode_init(struct rsnd_priv *priv, * SSI_MODE0 */ ssiu->ssi_mode0 = 0; - for_each_rsnd_ssi(ssi, priv, i) - ssiu->ssi_mode0 |= (1 << i); + for_each_rsnd_ssi(ssi, priv, i) { + flags = rsnd_ssi_mode_flags(ssi); + + /* see also BUSIF_MODE */ + if (!(flags & RSND_SSI_DEPENDENT)) { + ssiu->ssi_mode0 |= (1 << i); + dev_dbg(dev, "SSI%d uses INDEPENDENT mode\n", i); + } else { + dev_dbg(dev, "SSI%d uses DEPENDENT mode\n", i); + } + } /* * SSI_MODE1 @@ -670,6 +680,8 @@ int rsnd_ssi_probe(struct platform_device *pdev, dev_info(dev, "SSI DMA failed. try PIO transter\n"); else ops = &rsnd_ssi_dma_ops; + + dev_dbg(dev, "SSI%d use DMA transfer\n", i); } /* @@ -687,6 +699,8 @@ int rsnd_ssi_probe(struct platform_device *pdev, } ops = &rsnd_ssi_pio_ops; + + dev_dbg(dev, "SSI%d use PIO transfer\n", i); } rsnd_mod_init(priv, &ssi->mod, ops, i); |