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path: root/sound/soc/samsung/odroid.c
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Diffstat (limited to 'sound/soc/samsung/odroid.c')
-rw-r--r--sound/soc/samsung/odroid.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/sound/soc/samsung/odroid.c b/sound/soc/samsung/odroid.c
index 18bb3bfe0300..941e8c3f67a4 100644
--- a/sound/soc/samsung/odroid.c
+++ b/sound/soc/samsung/odroid.c
@@ -20,6 +20,11 @@ struct odroid_priv {
struct snd_soc_card card;
struct clk *clk_i2s_bus;
struct clk *sclk_i2s;
+
+ /* Spinlock protecting fields below */
+ spinlock_t lock;
+ unsigned int be_sample_rate;
+ bool be_active;
};
static int odroid_card_fe_startup(struct snd_pcm_substream *substream)
@@ -31,8 +36,25 @@ static int odroid_card_fe_startup(struct snd_pcm_substream *substream)
return 0;
}
+static int odroid_card_fe_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ if (priv->be_active && priv->be_sample_rate != params_rate(params))
+ ret = -EINVAL;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return ret;
+}
+
static const struct snd_soc_ops odroid_card_fe_ops = {
.startup = odroid_card_fe_startup,
+ .hw_params = odroid_card_fe_hw_params,
};
static int odroid_card_be_hw_params(struct snd_pcm_substream *substream,
@@ -41,6 +63,7 @@ static int odroid_card_be_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
unsigned int pll_freq, rclk_freq, rfs;
+ unsigned long flags;
int ret;
switch (params_rate(params)) {
@@ -87,11 +110,43 @@ static int odroid_card_be_hw_params(struct snd_pcm_substream *substream,
return ret;
}
+ spin_lock_irqsave(&priv->lock, flags);
+ priv->be_sample_rate = params_rate(params);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+
+static int odroid_card_be_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ priv->be_active = true;
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ priv->be_active = false;
+ break;
+ }
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
return 0;
}
static const struct snd_soc_ops odroid_card_be_ops = {
.hw_params = odroid_card_be_hw_params,
+ .trigger = odroid_card_be_trigger,
};
static struct snd_soc_dai_link odroid_card_dais[] = {
@@ -150,6 +205,7 @@ static int odroid_audio_probe(struct platform_device *pdev)
card->owner = THIS_MODULE;
card->fully_routed = true;
+ spin_lock_init(&priv->lock);
snd_soc_card_set_drvdata(card, priv);
ret = snd_soc_of_parse_card_name(card, "model");