2 files changed, 39 insertions, 45 deletions

diff --git a/sound/soc/davinci/davinci-evm.c b/sound/soc/davinci/davinci-evm.c
index 70ff3772079f..5e3bc3c6801a 100644
--- a/sound/soc/davinci/davinci-evm.c
+++ b/sound/soc/davinci/davinci-evm.c
@@ -399,6 +399,7 @@ static struct platform_driver davinci_evm_driver = {
         .driver         = {
                 .name   = "davinci_evm",
                 .owner  = THIS_MODULE,
+                .pm     = &snd_soc_pm_ops,
                 .of_match_table = of_match_ptr(davinci_evm_dt_ids),
         },
 };
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index b7858bfa0295..670afa29e30d 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -263,7 +263,9 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
                                          unsigned int fmt)
 {
         struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(cpu_dai);
+        int ret = 0;
 
+        pm_runtime_get_sync(mcasp->dev);
         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
         case SND_SOC_DAIFMT_DSP_B:
         case SND_SOC_DAIFMT_AC97:
@@ -317,7 +319,8 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
                 break;
 
         default:
-                return -EINVAL;
+                ret = -EINVAL;
+                goto out;
         }
 
         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
@@ -354,10 +357,12 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai,
                 break;
 
         default:
-                return -EINVAL;
+                ret = -EINVAL;
+                break;
         }
-
-        return 0;
+out:
+        pm_runtime_put_sync(mcasp->dev);
+        return ret;
 }
 
 static int davinci_mcasp_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
@@ -448,7 +453,7 @@ static int davinci_config_channel_size(struct davinci_mcasp *mcasp,
         return 0;
 }
 
-static int davinci_hw_common_param(struct davinci_mcasp *mcasp, int stream,
+static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
                                     int channels)
 {
         int i;
@@ -524,12 +529,18 @@ static int davinci_hw_common_param(struct davinci_mcasp *mcasp, int stream,
         return 0;
 }
 
-static void davinci_hw_param(struct davinci_mcasp *mcasp, int stream)
+static int mcasp_i2s_hw_param(struct davinci_mcasp *mcasp, int stream)
 {
         int i, active_slots;
         u32 mask = 0;
         u32 busel = 0;
 
+        if ((mcasp->tdm_slots < 2) || (mcasp->tdm_slots > 32)) {
+                dev_err(mcasp->dev, "tdm slot %d not supported\n",
+                        mcasp->tdm_slots);
+                return -EINVAL;
+        }
+
         active_slots = (mcasp->tdm_slots > 31) ? 32 : mcasp->tdm_slots;
         for (i = 0; i < active_slots; i++)
                 mask |= (1 << i);
@@ -539,35 +550,21 @@ static void davinci_hw_param(struct davinci_mcasp *mcasp, int stream)
         if (!mcasp->dat_port)
                 busel = TXSEL;
 
-        if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
-                /* bit stream is MSB first  with no delay */
-                /* DSP_B mode */
-                mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
-                mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
-
-                if ((mcasp->tdm_slots >= 2) && (mcasp->tdm_slots <= 32))
-                        mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
-                                       FSXMOD(mcasp->tdm_slots), FSXMOD(0x1FF));
-                else
-                        printk(KERN_ERR "playback tdm slot %d not supported\n",
-                                mcasp->tdm_slots);
-        } else {
-                /* bit stream is MSB first with no delay */
-                /* DSP_B mode */
-                mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
-                mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
-
-                if ((mcasp->tdm_slots >= 2) && (mcasp->tdm_slots <= 32))
-                        mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
-                                       FSRMOD(mcasp->tdm_slots), FSRMOD(0x1FF));
-                else
-                        printk(KERN_ERR "capture tdm slot %d not supported\n",
-                                mcasp->tdm_slots);
-        }
+        mcasp_set_reg(mcasp, DAVINCI_MCASP_TXTDM_REG, mask);
+        mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMT_REG, busel | TXORD);
+        mcasp_mod_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG,
+                       FSXMOD(mcasp->tdm_slots), FSXMOD(0x1FF));
+
+        mcasp_set_reg(mcasp, DAVINCI_MCASP_RXTDM_REG, mask);
+        mcasp_set_bits(mcasp, DAVINCI_MCASP_RXFMT_REG, busel | RXORD);
+        mcasp_mod_bits(mcasp, DAVINCI_MCASP_RXFMCTL_REG,
+                       FSRMOD(mcasp->tdm_slots), FSRMOD(0x1FF));
+
+        return 0;
 }
 
 /* S/PDIF */
-static void davinci_hw_dit_param(struct davinci_mcasp *mcasp)
+static int mcasp_dit_hw_param(struct davinci_mcasp *mcasp)
 {
         /* Set the TX format : 24 bit right rotation, 32 bit slot, Pad 0
            and LSB first */
@@ -589,6 +586,8 @@ static void davinci_hw_dit_param(struct davinci_mcasp *mcasp)
 
         /* Enable the DIT */
         mcasp_set_bits(mcasp, DAVINCI_MCASP_TXDITCTL_REG, DITEN);
+
+        return 0;
 }
 
 static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
@@ -605,13 +604,14 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
         u8 slots = mcasp->tdm_slots;
         u8 active_serializers;
         int channels;
+        int ret;
         struct snd_interval *pcm_channels = hw_param_interval(params,
                                         SNDRV_PCM_HW_PARAM_CHANNELS);
         channels = pcm_channels->min;
 
         active_serializers = (channels + slots - 1) / slots;
 
-        if (davinci_hw_common_param(mcasp, substream->stream, channels) == -EINVAL)
+        if (mcasp_common_hw_param(mcasp, substream->stream, channels) == -EINVAL)
                 return -EINVAL;
         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
                 fifo_level = mcasp->txnumevt * active_serializers;
@@ -619,9 +619,12 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
                 fifo_level = mcasp->rxnumevt * active_serializers;
 
         if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
-                davinci_hw_dit_param(mcasp);
+                ret = mcasp_dit_hw_param(mcasp);
         else
-                davinci_hw_param(mcasp, substream->stream);
+                ret = mcasp_i2s_hw_param(mcasp, substream->stream);
+
+        if (ret)
+                return ret;
 
         switch (params_format(params)) {
         case SNDRV_PCM_FORMAT_U8:
@@ -678,19 +681,9 @@ static int davinci_mcasp_trigger(struct snd_pcm_substream *substream,
         case SNDRV_PCM_TRIGGER_RESUME:
         case SNDRV_PCM_TRIGGER_START:
         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
-                ret = pm_runtime_get_sync(mcasp->dev);
-                if (IS_ERR_VALUE(ret))
-                        dev_err(mcasp->dev, "pm_runtime_get_sync() failed\n");
                 davinci_mcasp_start(mcasp, substream->stream);
                 break;
-
         case SNDRV_PCM_TRIGGER_SUSPEND:
-                davinci_mcasp_stop(mcasp, substream->stream);
-                ret = pm_runtime_put_sync(mcasp->dev);
-                if (IS_ERR_VALUE(ret))
-                        dev_err(mcasp->dev, "pm_runtime_put_sync() failed\n");
-                break;
-
         case SNDRV_PCM_TRIGGER_STOP:
         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
                 davinci_mcasp_stop(mcasp, substream->stream);