diff --git a/drivers/usb/gadget/f_audio_source.c b/drivers/usb/gadget/f_audio_source.c index 003f5fa6b804d2e431e59ffd2ce8f0c7493a7026..353219141d99381653059e3e1a48317f6a29305b 100644 --- a/drivers/usb/gadget/f_audio_source.c +++ b/drivers/usb/gadget/f_audio_source.c @@ -260,6 +260,7 @@ struct audio_dev { s64 frames_sent; bool audio_ep_enabled; + bool triggered; }; static inline struct audio_dev *func_to_audio_source(struct usb_function *f) @@ -267,6 +268,8 @@ static inline struct audio_dev *func_to_audio_source(struct usb_function *f) return container_of(f, struct audio_dev, func); } +static void audio_pcm_playback_start(struct audio_dev *audio); + /*-------------------------------------------------------------------------*/ static struct usb_request *audio_request_new(struct usb_ep *ep, int buffer_size) @@ -545,6 +548,10 @@ static int audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt) return ret; } audio->audio_ep_enabled = true; + if (audio->triggered) { + // resume playing if we are still triggered + audio_pcm_playback_start(audio); + } } else if (!alt && audio->audio_ep_enabled) { usb_ep_disable(audio->in_ep); audio->audio_ep_enabled = false; @@ -767,11 +774,13 @@ static int audio_pcm_playback_trigger(struct snd_pcm_substream *substream, switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: + audio->triggered = 1; audio_pcm_playback_start(audio); break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: + audio->triggered = 0; audio_pcm_playback_stop(audio); break;