diff mbox series

[v5,04/10] usb: gadget: u_audio: Add capture/playback srate getter

Message ID 20220121155308.48794-5-pavel.hofman@ivitera.com
State New
Headers show
Series usb: gadget: audio: Multiple rates, notify | expand

Commit Message

Pavel Hofman Jan. 21, 2022, 3:53 p.m. UTC 
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>
---
v3: new patch
---
 drivers/usb/gadget/function/u_audio.c | 28 +++++++++++++++++++++++++++
 drivers/usb/gadget/function/u_audio.h |  2 ++
 2 files changed, 30 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/gadget/function/u_audio.c b/drivers/usb/gadget/function/u_audio.c
index dce894dcae07..283a449a9538 100644
--- a/drivers/usb/gadget/function/u_audio.c
+++ b/drivers/usb/gadget/function/u_audio.c
@@ -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;
diff --git a/drivers/usb/gadget/function/u_audio.h b/drivers/usb/gadget/function/u_audio.h
index 84579fe81b92..5e6ed0f31cc3 100644
--- a/drivers/usb/gadget/function/u_audio.h
+++ b/drivers/usb/gadget/function/u_audio.h
@@ -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);