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usb: gadget: u_audio: Add capture/playback srate getter

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UAC1/UAC2 functions will need to query u_audio about the currently set
srate. Add the getter functions.

Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20220121155308.48794-5-pavel.hofman@ivitera.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pavel Hofman 2022-01-21 16:53:02 +01:00 committed by Greg Kroah-Hartman
parent 8722a949e6
commit eb3a1ce6f5
2 changed files with 30 additions and 0 deletions
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28
drivers/usb/gadget/function/u_audio.c
View File

@ -515,6 +515,20 @@ int u_audio_set_capture_srate(struct g_audio *audio_dev, int srate)
}
EXPORT_SYMBOL_GPL(u_audio_set_capture_srate);
int u_audio_get_capture_srate(struct g_audio *audio_dev, u32 *val)
{
struct snd_uac_chip *uac = audio_dev->uac;
struct uac_rtd_params *prm;
unsigned long flags;
prm = &uac->c_prm;
spin_lock_irqsave(&prm->lock, flags);
*val = prm->srate;
spin_unlock_irqrestore(&prm->lock, flags);
return 0;
}
EXPORT_SYMBOL_GPL(u_audio_get_capture_srate);
int u_audio_set_playback_srate(struct g_audio *audio_dev, int srate)
{
struct uac_params *params = &audio_dev->params;
@ -540,6 +554,20 @@ int u_audio_set_playback_srate(struct g_audio *audio_dev, int srate)
}
EXPORT_SYMBOL_GPL(u_audio_set_playback_srate);
int u_audio_get_playback_srate(struct g_audio *audio_dev, u32 *val)
{
struct snd_uac_chip *uac = audio_dev->uac;
struct uac_rtd_params *prm;
unsigned long flags;
prm = &uac->p_prm;
spin_lock_irqsave(&prm->lock, flags);
*val = prm->srate;
spin_unlock_irqrestore(&prm->lock, flags);
return 0;
}
EXPORT_SYMBOL_GPL(u_audio_get_playback_srate);
int u_audio_start_capture(struct g_audio *audio_dev)
{
struct snd_uac_chip *uac = audio_dev->uac;

2
drivers/usb/gadget/function/u_audio.h
View File

@ -120,7 +120,9 @@ void u_audio_stop_capture(struct g_audio *g_audio);
int u_audio_start_playback(struct g_audio *g_audio);
void u_audio_stop_playback(struct g_audio *g_audio);
int u_audio_get_capture_srate(struct g_audio *audio_dev, u32 *val);
int u_audio_set_capture_srate(struct g_audio *audio_dev, int srate);
int u_audio_get_playback_srate(struct g_audio *audio_dev, u32 *val);
int u_audio_set_playback_srate(struct g_audio *audio_dev, int srate);
int u_audio_get_volume(struct g_audio *g_audio, int playback, s16 *val);