[ALSA] rme96 - Fix OSS full-duplex

Fixed a bug in rme96 driver that the full-duplex on OSS emulation
doesn't work due to the invalid period size parameter.

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

1 files changed, 23 insertions, 9 deletions

diff --git a/sound/pci/rme96.c b/sound/pci/rme96.c
index 75a8b754ef28..65611a7d366d 100644
--- a/sound/pci/rme96.c
+++ b/sound/pci/rme96.c
@@ -1151,6 +1151,25 @@ static struct snd_pcm_hw_constraint_list hw_constraints_period_bytes = {
         .mask = 0
 };
 
+static void
+rme96_set_buffer_size_constraint(struct rme96 *rme96,
+                                 struct snd_pcm_runtime *runtime)
+{
+        unsigned int size;
+
+        snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+                                     RME96_BUFFER_SIZE, RME96_BUFFER_SIZE);
+        if ((size = rme96->playback_periodsize) != 0 ||
+            (size = rme96->capture_periodsize) != 0)
+                snd_pcm_hw_constraint_minmax(runtime,
+                                             SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
+                                             size, size);
+        else
+                snd_pcm_hw_constraint_list(runtime, 0,
+                                           SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
+                                           &hw_constraints_period_bytes);
+}
+
 static int
 snd_rme96_playback_spdif_open(struct snd_pcm_substream *substream)
 {
@@ -1180,8 +1199,7 @@ snd_rme96_playback_spdif_open(struct snd_pcm_substream *substream)
                 runtime->hw.rate_min = rate;
                 runtime->hw.rate_max = rate;
         }        
-        snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, RME96_BUFFER_SIZE, RME96_BUFFER_SIZE);
-        snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, &hw_constraints_period_bytes);
+        rme96_set_buffer_size_constraint(rme96, runtime);
 
         rme96->wcreg_spdif_stream = rme96->wcreg_spdif;
         rme96->spdif_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
@@ -1219,9 +1237,7 @@ snd_rme96_capture_spdif_open(struct snd_pcm_substream *substream)
         rme96->capture_substream = substream;
         spin_unlock_irq(&rme96->lock);
         
-        snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, RME96_BUFFER_SIZE, RME96_BUFFER_SIZE);
-        snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, &hw_constraints_period_bytes);
-
+        rme96_set_buffer_size_constraint(rme96, runtime);
         return 0;
 }
 
@@ -1254,8 +1270,7 @@ snd_rme96_playback_adat_open(struct snd_pcm_substream *substream)
                 runtime->hw.rate_min = rate;
                 runtime->hw.rate_max = rate;
         }        
-        snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, RME96_BUFFER_SIZE, RME96_BUFFER_SIZE);
-        snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, &hw_constraints_period_bytes);
+        rme96_set_buffer_size_constraint(rme96, runtime);
         return 0;
 }
 
@@ -1291,8 +1306,7 @@ snd_rme96_capture_adat_open(struct snd_pcm_substream *substream)
         rme96->capture_substream = substream;
         spin_unlock_irq(&rme96->lock);
 
-        snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, RME96_BUFFER_SIZE, RME96_BUFFER_SIZE);
-        snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, &hw_constraints_period_bytes);
+        rme96_set_buffer_size_constraint(rme96, runtime);
         return 0;
 }