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path: root/sound/soc/mxs/mxs-saif.c
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Diffstat (limited to 'sound/soc/mxs/mxs-saif.c')
-rw-r--r--sound/soc/mxs/mxs-saif.c30
1 files changed, 25 insertions, 5 deletions
diff --git a/sound/soc/mxs/mxs-saif.c b/sound/soc/mxs/mxs-saif.c
index 14152f6f70dd..54e622acac33 100644
--- a/sound/soc/mxs/mxs-saif.c
+++ b/sound/soc/mxs/mxs-saif.c
@@ -494,6 +494,7 @@ static int mxs_saif_trigger(struct snd_pcm_substream *substream, int cmd,
struct mxs_saif *saif = snd_soc_dai_get_drvdata(cpu_dai);
struct mxs_saif *master_saif;
u32 delay;
+ int ret;
master_saif = mxs_saif_get_master(saif);
if (!master_saif)
@@ -503,23 +504,37 @@ static int mxs_saif_trigger(struct snd_pcm_substream *substream, int cmd,
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (saif->state == MXS_SAIF_STATE_RUNNING)
+ return 0;
+
dev_dbg(cpu_dai->dev, "start\n");
- clk_enable(master_saif->clk);
- if (!master_saif->mclk_in_use)
- __raw_writel(BM_SAIF_CTRL_RUN,
- master_saif->base + SAIF_CTRL + MXS_SET_ADDR);
+ ret = clk_enable(master_saif->clk);
+ if (ret) {
+ dev_err(saif->dev, "Failed to enable master clock\n");
+ return ret;
+ }
/*
* If the saif's master is not himself, we also need to enable
* itself clk for its internal basic logic to work.
*/
if (saif != master_saif) {
- clk_enable(saif->clk);
+ ret = clk_enable(saif->clk);
+ if (ret) {
+ dev_err(saif->dev, "Failed to enable master clock\n");
+ clk_disable(master_saif->clk);
+ return ret;
+ }
+
__raw_writel(BM_SAIF_CTRL_RUN,
saif->base + SAIF_CTRL + MXS_SET_ADDR);
}
+ if (!master_saif->mclk_in_use)
+ __raw_writel(BM_SAIF_CTRL_RUN,
+ master_saif->base + SAIF_CTRL + MXS_SET_ADDR);
+
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
/*
* write data to saif data register to trigger
@@ -543,6 +558,7 @@ static int mxs_saif_trigger(struct snd_pcm_substream *substream, int cmd,
}
master_saif->ongoing = 1;
+ saif->state = MXS_SAIF_STATE_RUNNING;
dev_dbg(saif->dev, "CTRL 0x%x STAT 0x%x\n",
__raw_readl(saif->base + SAIF_CTRL),
@@ -555,6 +571,9 @@ static int mxs_saif_trigger(struct snd_pcm_substream *substream, int cmd,
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ if (saif->state == MXS_SAIF_STATE_STOPPED)
+ return 0;
+
dev_dbg(cpu_dai->dev, "stop\n");
/* wait a while for the current sample to complete */
@@ -575,6 +594,7 @@ static int mxs_saif_trigger(struct snd_pcm_substream *substream, int cmd,
}
master_saif->ongoing = 0;
+ saif->state = MXS_SAIF_STATE_STOPPED;
break;
default: