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ALSA: hdspm - Constrain periods to 2 on older cards 

commit f0153c3d948c1764f6c920a0675d86fc1d75813e upstream.

RME RayDAT and AIO use a fixed buffer size of 16384 samples. With period
sizes of 32-4096, this translates to 4-512 periods.

The older RME cards have a variable buffer size but require exactly two
periods.

This patch enforces nperiods=2 on those cards.

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Adrian Knoth 2015-02-10 11:33:50 +01:00 committed by Greg Kroah-Hartman
parent 331e036da1
commit 3962a253b2
1 changed files with 6 additions and 0 deletions
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6
sound/pci/rme9652/hdspm.c
View File

@ -5789,6 +5789,9 @@ static int snd_hdspm_playback_open(struct snd_pcm_substream *substream)
snd_pcm_hw_constraint_minmax(runtime,
SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
64, 8192);
snd_pcm_hw_constraint_minmax(runtime,
SNDRV_PCM_HW_PARAM_PERIODS,
2, 2);
break;
}
@ -5863,6 +5866,9 @@ static int snd_hdspm_capture_open(struct snd_pcm_substream *substream)
snd_pcm_hw_constraint_minmax(runtime,
SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
64, 8192);
snd_pcm_hw_constraint_minmax(runtime,
SNDRV_PCM_HW_PARAM_PERIODS,
2, 2);
break;
}