diff options
| author | Takashi Iwai <tiwai@suse.de> | 2007-05-02 12:09:48 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2007-05-11 16:56:13 +0200 |
| commit | 6b9fa70a73e8627c2823ee95e7c55d77e0716f1c (patch) | |
| tree | e8c9e348a63e9282f9ab48021b2b38e01543cd7b /sound/usb | |
| parent | 27fe0f4b985d8427d93ff6c9457e198ab8ffe035 (diff) | |
[ALSA] usb-audio - Fix the minimum period size per transfer mode
The minimal period size is 125us for high-speed mode while
1ms for full-speed mode.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/usbaudio.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index b6d886373bb..78efcffce8d 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -1879,7 +1879,9 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre /* set the period time minimum 1ms */ snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, - 1000 * MIN_PACKS_URB, + snd_usb_get_speed(subs->dev) == USB_SPEED_FULL ? + + 1000 * MIN_PACKS_URB : 125 * MIN_PACKS_URB, /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX); if (check_hw_params_convention(subs)) { |