diff options
Diffstat (limited to 'sound/usb/usbaudio.h')
| -rw-r--r-- | sound/usb/usbaudio.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h index 58fd07f8c3c9..9afcad8f143a 100644 --- a/sound/usb/usbaudio.h +++ b/sound/usb/usbaudio.h @@ -236,6 +236,12 @@ extern bool snd_usb_skip_validation; * QUIRK_FLAG_MIXER_CAPTURE_LINEAR_VOL * Similar to QUIRK_FLAG_MIXER_PLAYBACK_LINEAR_VOL, but for capture streams. * Overrides QUIRK_FLAG_MIXER_CAPTURE_MIN_MUTE + * QUIRK_FLAG_IFB_SILENCE_ON_EMPTY + * In implicit feedback mode, when an entire capture URB returns with + * all iso_frame_desc[i].status != 0 (bytes==0), do not silently return + * from snd_usb_handle_sync_urb. Instead fall through and enqueue a + * packet_info containing only size-0 packets, so the OUT ring keeps + * moving (emits silence). Needed by Behringer Flow 8 (1397:050c). */ enum { @@ -268,6 +274,7 @@ enum { QUIRK_TYPE_SKIP_IFACE_SETUP = 26, QUIRK_TYPE_MIXER_PLAYBACK_LINEAR_VOL = 27, QUIRK_TYPE_MIXER_CAPTURE_LINEAR_VOL = 28, + QUIRK_TYPE_IFB_SILENCE_ON_EMPTY = 29, /* Please also edit snd_usb_audio_quirk_flag_names */ }; @@ -302,5 +309,6 @@ enum { #define QUIRK_FLAG_SKIP_IFACE_SETUP QUIRK_FLAG(SKIP_IFACE_SETUP) #define QUIRK_FLAG_MIXER_PLAYBACK_LINEAR_VOL QUIRK_FLAG(MIXER_PLAYBACK_LINEAR_VOL) #define QUIRK_FLAG_MIXER_CAPTURE_LINEAR_VOL QUIRK_FLAG(MIXER_CAPTURE_LINEAR_VOL) +#define QUIRK_FLAG_IFB_SILENCE_ON_EMPTY QUIRK_FLAG(IFB_SILENCE_ON_EMPTY) #endif /* __USBAUDIO_H */ |