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authorAdrian Knoth <adi@drcomp.erfurt.thur.de>2015-02-10 11:33:50 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-03-06 14:40:49 -0800
commit3962a253b21474940c8b858ec0aff0428c2c3e82 (patch)
tree707ee294b595693d9c6b1816ee534d1755fc3e9c /sound/pci
parent331e036da19ecd0e1d4e0feb78226f99c04fdc4b (diff)
downloadlinux-linaro-stable-3962a253b21474940c8b858ec0aff0428c2c3e82.tar.gz
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>
Diffstat (limited to 'sound/pci')
-rw-r--r--sound/pci/rme9652/hdspm.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 9ea05e956474..dd910d249987 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -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;
}