[ALSA] ice1724 - Fix the SPDIF input sample-rate on Juli@

AK4114 on Juli@ has the SPDIF input sample rate detection and
causes errors when an incompatible sample rate is chosen.
The patch adds the open hook to check the current rate and limit
the hw constraints.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ice1712/ice1724.c

@@ -970,6 +970,8 @@ static int snd_vt1724_playback_spdif_open(struct snd_pcm_substream *substream)
 				   VT1724_BUFFER_ALIGN);
 	snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 				   VT1724_BUFFER_ALIGN);
+	if (ice->spdif.ops.open)
+		ice->spdif.ops.open(ice, substream);
 	return 0;
 }
 
@@ -980,6 +982,8 @@ static int snd_vt1724_playback_spdif_close(struct snd_pcm_substream *substream)
 	if (PRO_RATE_RESET)
 		snd_vt1724_set_pro_rate(ice, PRO_RATE_DEFAULT, 0);
 	ice->playback_con_substream = NULL;
+	if (ice->spdif.ops.close)
+		ice->spdif.ops.close(ice, substream);
 
 	return 0;
 }
@@ -1002,6 +1006,8 @@ static int snd_vt1724_capture_spdif_open(struct snd_pcm_substream *substream)
 				   VT1724_BUFFER_ALIGN);
 	snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 				   VT1724_BUFFER_ALIGN);
+	if (ice->spdif.ops.open)
+		ice->spdif.ops.open(ice, substream);
 	return 0;
 }
 
@@ -1012,6 +1018,8 @@ static int snd_vt1724_capture_spdif_close(struct snd_pcm_substream *substream)
 	if (PRO_RATE_RESET)
 		snd_vt1724_set_pro_rate(ice, PRO_RATE_DEFAULT, 0);
 	ice->capture_con_substream = NULL;
+	if (ice->spdif.ops.close)
+		ice->spdif.ops.close(ice, substream);
 
 	return 0;
 }

sound/pci/ice1712/juli.c

@@ -77,6 +77,22 @@ static unsigned char juli_ak4114_read(void *private_data, unsigned char reg)
 	return snd_vt1724_read_i2c((struct snd_ice1712 *)private_data, AK4114_ADDR, reg);
 }
 
+static void juli_spdif_in_open(struct snd_ice1712 *ice,
+			       struct snd_pcm_substream *substream)
+{
+	struct juli_spec *spec = ice->spec;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int rate;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		return;
+	rate = snd_ak4114_external_rate(spec->ak4114);
+	if (rate >= runtime->hw.rate_min && rate <= runtime->hw.rate_max) {
+		runtime->hw.rate_min = rate;
+		runtime->hw.rate_max = rate;
+	}
+}
+
 /*
  * AK4358 section
  */
@@ -210,6 +226,7 @@ static int __devinit juli_init(struct snd_ice1712 *ice)
 			return err;
 	}
 	
+	ice->spdif.ops.open = juli_spdif_in_open;
 	return 0;
 }