diff options
| author | Bo Shen <voice.shen@atmel.com> | 2013-12-04 10:37:03 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-12-04 12:27:08 +0000 |
| commit | a8f1f100ad994725a8295f6997524c57c72e06f5 (patch) | |
| tree | b81215618b487fa21dd00db6d9dfc6174a214cc7 /sound/soc/atmel/atmel_ssc_dai.c | |
| parent | 46bec25da6a41b7308adde746cbcdbbd0bf9b39c (diff) | |
| download | linux-a8f1f100ad994725a8295f6997524c57c72e06f5.tar.gz | |
ASoC: atmel_ssc_dai: add dai trigger ops
According to the SSC specifiation, it should be enabled after DMA is enabled. So, add trigger operation to make sure the right sequence. Signed-off-by: Bo Shen <voice.shen@atmel.com> Tested-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/atmel/atmel_ssc_dai.c')
| -rw-r--r-- | sound/soc/atmel/atmel_ssc_dai.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c index 8697cedccd21..1ead3c977a51 100644 --- a/sound/soc/atmel/atmel_ssc_dai.c +++ b/sound/soc/atmel/atmel_ssc_dai.c @@ -648,7 +648,7 @@ static int atmel_ssc_prepare(struct snd_pcm_substream *substream, dma_params = ssc_p->dma_params[dir]; - ssc_writel(ssc_p->ssc->regs, CR, dma_params->mask->ssc_enable); + ssc_writel(ssc_p->ssc->regs, CR, dma_params->mask->ssc_disable); ssc_writel(ssc_p->ssc->regs, IDR, dma_params->mask->ssc_error); pr_debug("%s enabled SSC_SR=0x%08x\n", @@ -657,6 +657,33 @@ static int atmel_ssc_prepare(struct snd_pcm_substream *substream, return 0; } +static int atmel_ssc_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct atmel_ssc_info *ssc_p = &ssc_info[dai->id]; + struct atmel_pcm_dma_params *dma_params; + int dir; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + dir = 0; + else + dir = 1; + + dma_params = ssc_p->dma_params[dir]; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + ssc_writel(ssc_p->ssc->regs, CR, dma_params->mask->ssc_enable); + break; + default: + ssc_writel(ssc_p->ssc->regs, CR, dma_params->mask->ssc_disable); + break; + } + + return 0; +} #ifdef CONFIG_PM static int atmel_ssc_suspend(struct snd_soc_dai *cpu_dai) @@ -731,6 +758,7 @@ static const struct snd_soc_dai_ops atmel_ssc_dai_ops = { .startup = atmel_ssc_startup, .shutdown = atmel_ssc_shutdown, .prepare = atmel_ssc_prepare, + .trigger = atmel_ssc_trigger, .hw_params = atmel_ssc_hw_params, .set_fmt = atmel_ssc_set_dai_fmt, .set_clkdiv = atmel_ssc_set_dai_clkdiv, |