diff options
| -rw-r--r-- | sound/usb/card.c | 21 | ||||
| -rw-r--r-- | sound/usb/card.h | 2 |
2 files changed, 23 insertions, 0 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c index 4ac7f2b8309a..9fb8726a6c93 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -156,6 +156,27 @@ int snd_usb_unregister_platform_ops(void) EXPORT_SYMBOL_GPL(snd_usb_unregister_platform_ops); /* + * in case the platform driver was not ready at the time of USB SND + * device connect, expose an API to discover all connected USB devices + * so it can populate any dependent resources/structures. + */ +void snd_usb_rediscover_devices(void) +{ + int i; + + guard(mutex)(®ister_mutex); + + if (!platform_ops || !platform_ops->connect_cb) + return; + + for (i = 0; i < SNDRV_CARDS; i++) { + if (usb_chip[i]) + platform_ops->connect_cb(usb_chip[i]); + } +} +EXPORT_SYMBOL_GPL(snd_usb_rediscover_devices); + +/* * Checks to see if requested audio profile, i.e sample rate, # of * channels, etc... is supported by the substream associated to the * USB audio device. diff --git a/sound/usb/card.h b/sound/usb/card.h index d8b8522e1613..94404c24d240 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -222,4 +222,6 @@ snd_usb_find_suppported_substream(int card_idx, struct snd_pcm_hw_params *params int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops); int snd_usb_unregister_platform_ops(void); + +void snd_usb_rediscover_devices(void); #endif /* __USBAUDIO_CARD_H */ |