From: Adrian Knoth Date: Tue, 10 Feb 2015 10:33:50 +0000 (+0100) Subject: ALSA: hdspm - Constrain periods to 2 on older cards X-Git-Tag: v3.2.69~178 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c21a3eadc4f794c7f9aaf86c1d2d5df5b8b6c89;p=pandora-kernel.git 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 Signed-off-by: Takashi Iwai Signed-off-by: Ben Hutchings --- diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c index 19ee2203cbb5..71a3d52741bb 100644 --- a/sound/pci/rme9652/hdspm.c +++ b/sound/pci/rme9652/hdspm.c @@ -5966,6 +5966,9 @@ 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; } @@ -6040,6 +6043,9 @@ 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; }