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| author | Kuninori Morimoto | 2015-04-10 10:50:30 +0200 |
|---|---|---|
| committer | Mark Brown | 2015-04-27 21:57:38 +0200 |
| commit | 919567d914b3c134e60c01db72a03a0adc5f41b9 (patch) | |
| tree | f46c5e4d47afae9e9f35dffd0dadc23577e39548 /sound/soc/sh | |
| parent | ASoC: rsnd: tidyup SSI parent related function/macro names (diff) | |
| download | kernel-qcow2-linux-919567d914b3c134e60c01db72a03a0adc5f41b9.tar.gz kernel-qcow2-linux-919567d914b3c134e60c01db72a03a0adc5f41b9.tar.xz kernel-qcow2-linux-919567d914b3c134e60c01db72a03a0adc5f41b9.zip | |
ASoC: rsnd: make sure SSI parent/child uses same number of sound channel.
SSI parent/child need to use same number of sound data channel
if these are sharing clock/ws pin. this patch makes it sure.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/sh')
| -rw-r--r-- | sound/soc/sh/rcar/ssi.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c index 2ef48a44c4ab..5b89723c3206 100644 --- a/sound/soc/sh/rcar/ssi.c +++ b/sound/soc/sh/rcar/ssi.c @@ -66,6 +66,7 @@ struct rsnd_ssi { u32 cr_own; u32 cr_clk; + int chan; int err; unsigned int usrcnt; }; @@ -264,6 +265,8 @@ static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi) } rsnd_mod_hw_stop(&ssi->mod); + + ssi->chan = 0; } dev_dbg(dev, "%s[%d] hw stopped\n", @@ -340,6 +343,35 @@ static int rsnd_ssi_quit(struct rsnd_mod *mod, return 0; } +static int rsnd_ssi_hw_params(struct rsnd_mod *mod, + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi); + int chan = params_channels(params); + + /* + * Already working. + * It will happen if SSI has parent/child connection. + */ + if (ssi->usrcnt) { + /* + * it is error if child <-> parent SSI uses + * different channels. + */ + if (ssi->chan != chan) + return -EIO; + } + + /* It will be removed on rsnd_ssi_hw_stop */ + ssi->chan = chan; + if (ssi_parent) + return rsnd_ssi_hw_params(&ssi_parent->mod, substream, params); + + return 0; +} + static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status) { /* under/over flow error */ @@ -460,6 +492,7 @@ static struct rsnd_mod_ops rsnd_ssi_pio_ops = { .quit = rsnd_ssi_quit, .start = rsnd_ssi_start, .stop = rsnd_ssi_stop, + .hw_params = rsnd_ssi_hw_params, }; static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, @@ -569,6 +602,7 @@ static struct rsnd_mod_ops rsnd_ssi_dma_ops = { .start = rsnd_ssi_dma_start, .stop = rsnd_ssi_dma_stop, .fallback = rsnd_ssi_fallback, + .hw_params = rsnd_ssi_hw_params, }; int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod) |