ALSA: via82xx: allow to disable the SRC

Add the PCM rule to allow disabling the PCM playback SRC.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/sound/pci/via82xx.c b/sound/pci/via82xx.c
index 35d5f4313d9..c3656fffdb5 100644
--- a/sound/pci/via82xx.c
+++ b/sound/pci/via82xx.c
@@ -1175,6 +1175,7 @@ static int snd_via82xx_pcm_open(struct via82xx *chip, struct viadev *viadev,
         struct snd_pcm_runtime *runtime = substream->runtime;
         int err;
         struct via_rate_lock *ratep;
+        bool use_src = false;
 
         runtime->hw = snd_via82xx_hw;
         
@@ -1196,6 +1197,7 @@ static int snd_via82xx_pcm_open(struct via82xx *chip, struct viadev *viadev,
                                      SNDRV_PCM_RATE_8000_48000);
                 runtime->hw.rate_min = 8000;
                 runtime->hw.rate_max = 48000;
+                use_src = true;
         } else if (! ratep->rate) {
                 int idx = viadev->direction ? AC97_RATES_ADC : AC97_RATES_FRONT_DAC;
                 runtime->hw.rates = chip->ac97->rates[idx];
@@ -1212,6 +1214,12 @@ static int snd_via82xx_pcm_open(struct via82xx *chip, struct viadev *viadev,
         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
                 return err;
 
+        if (use_src) {
+                err = snd_pcm_hw_rule_noresample(runtime, 48000);
+                if (err < 0)
+                        return err;
+        }
+
         runtime->private_data = viadev;
         viadev->substream = substream;