[alsa-devel] [PATCH] Allow to switch hardware sampe rate on EMU

[Takashi Iwai]

At Mon, 25 Feb 2013 10:02:45 +0000,
Mihail Zenkov wrote:
> 
> 2013/2/25, Takashi Iwai <tiwai at suse.de>:
> > Ah, OK, then your patch would make sense.  Could you update the patch
> > description to elaborate a bit more about this?
> 
> Commit 57e5c63007955838043e34c732d224b2cbbb128f "emu10k1: allow to
>  disable the SRC" force hardware use only one rate (48000 hz).
> EMU 0404/1010/1616 have support two hardware sampling rates (44100 and
> 48000 hz). This patch add check if we have EMU 0404/1010/1616 and
> choose correct sample rate to restrict.
> 
>  Signed-off-by: Mihail Zenkov <mihail.zenkov at gmail.com>

OK, applied now.  Thanks.


Takashi

> 
>  --- linux-3.8/sound/pci/emu10k1/emupcm.c
>  +++ linux-3.8-1/sound/pci/emu10k1/emupcm.c
>  @@ -1127,7 +1127,7 @@
>          struct snd_emu10k1_pcm *epcm;
>          struct snd_emu10k1_pcm_mixer *mix;
>          struct snd_pcm_runtime *runtime = substream->runtime;
>  -       int i, err;
>  +       int i, err, sample_rate;
> 
>          epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
>          if (epcm == NULL)
>  @@ -1146,7 +1146,11 @@
>                  kfree(epcm);
>                  return err;
>          }
>  -       err = snd_pcm_hw_rule_noresample(runtime, 48000);
>  +       if (emu->card_capabilities->emu_model &&
> emu->emu1010.internal_clock == 0)
>  +               sample_rate = 44100;
>  +       else
>  +               sample_rate = 48000;
>  +       err = snd_pcm_hw_rule_noresample(runtime, sample_rate);
>          if (err < 0) {
>                  kfree(epcm);
>                  return err;
>