AcoSail/kernel_optimize_test
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ALSA: via82xx: allow to disable the SRC

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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>
This commit is contained in:
Clemens Ladisch 2011-09-16 23:16:05 +02:00 committed by Takashi Iwai
parent 57e5c63007
commit 5495ffbd7b
1 changed files with 8 additions and 0 deletions
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8
sound/pci/via82xx.c
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@ -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;