| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 043/151] ALSA: hdspm - Constrain periods to 2 on older cards | Date | Tue, 3 Mar 2015 22:12:57 -0800 |
| |
3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Adrian Knoth <adi@drcomp.erfurt.thur.de>
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>
--- sound/pci/rme9652/hdspm.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/sound/pci/rme9652/hdspm.c +++ b/sound/pci/rme9652/hdspm.c @@ -6114,6 +6114,9 @@ static int snd_hdspm_playback_open(struc 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; } @@ -6188,6 +6191,9 @@ static int snd_hdspm_capture_open(struct 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; }
|