usb: gadget: f_uac1: Add suspend callback

Add suspend callback to f_uac1 function, calling corresponding method
of u_audio in order to stop the respective PCM streams and to notify
subscribed clients about the stop.

Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20220121155308.48794-11-pavel.hofman@ivitera.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c
index 73df76a6fbe036b2d7772a2b034e903e21669b3a..1484e5c231d33893a01940311139cfa3afcb676e 100644 (file)
--- a/drivers/usb/gadget/function/f_uac1.c
+++ b/drivers/usb/gadget/function/f_uac1.c
@@ -961,6 +961,14 @@ static void f_audio_disable(struct usb_function *f)
                usb_ep_disable(uac1->int_ep);
 }
 
+static void
+f_audio_suspend(struct usb_function *f)
+{
+       struct f_uac1 *uac1 = func_to_uac1(f);
+
+       u_audio_suspend(&uac1->g_audio);
+}
+
 /*-------------------------------------------------------------------------*/
 static struct uac_feature_unit_descriptor *build_fu_desc(int chmask)
 {
@@ -1691,6 +1699,7 @@ static struct usb_function *f_audio_alloc(struct usb_function_instance *fi)
        uac1->g_audio.func.get_alt = f_audio_get_alt;
        uac1->g_audio.func.setup = f_audio_setup;
        uac1->g_audio.func.disable = f_audio_disable;
+       uac1->g_audio.func.suspend = f_audio_suspend;
        uac1->g_audio.func.free_func = f_audio_free;
 
        return &uac1->g_audio.func;