6 files changed, 459 insertions, 41 deletions

diff --git a/sound/usb/card.c b/sound/usb/card.c
index 0d7a5d70634e..f6c3c1cd591e 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -307,6 +307,20 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
 			return -EINVAL;
 		}
 
+		if (protocol == UAC_VERSION_3) {
+			int badd = assoc->bFunctionSubClass;
+
+			if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 &&
+			    (badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO ||
+			     badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) {
+				dev_err(&dev->dev,
+					"Unsupported UAC3 BADD profile\n");
+				return -EINVAL;
+			}
+
+			chip->badd_profile = badd;
+		}
+
 		for (i = 0; i < assoc->bInterfaceCount; i++) {
 			int intf = assoc->bFirstInterface + i;
 
diff --git a/sound/usb/clock.c b/sound/usb/clock.c
index 0b030d8fe3fa..17673f37fcc8 100644
--- a/sound/usb/clock.c
+++ b/sound/usb/clock.c
@@ -587,8 +587,15 @@ int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface,
 	default:
 		return set_sample_rate_v1(chip, iface, alts, fmt, rate);
 
-	case UAC_VERSION_2:
 	case UAC_VERSION_3:
+		if (chip->badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) {
+			if (rate != UAC3_BADD_SAMPLING_RATE)
+				return -ENXIO;
+			else
+				return 0;
+		}
+	/* fall through */
+	case UAC_VERSION_2:
 		return set_sample_rate_v2v3(chip, iface, alts, fmt, rate);
 	}
 }
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 76417943ff85..4987982250d5 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -112,14 +112,12 @@ enum {
 #include "mixer_maps.c"
 
 static const struct usbmix_name_map *
-find_map(struct mixer_build *state, int unitid, int control)
+find_map(const struct usbmix_name_map *p, int unitid, int control)
 {
-	const struct usbmix_name_map *p = state->map;
-
 	if (!p)
 		return NULL;
 
-	for (p = state->map; p->id; p++) {
+	for (; p->id; p++) {
 		if (p->id == unitid &&
 		    (!control || !p->control || control == p->control))
 			return p;
@@ -1333,16 +1331,16 @@ static struct usb_feature_control_info *get_feature_control_info(int control)
 	return NULL;
 }
 
-static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
-			      unsigned int ctl_mask, int control,
-			      struct usb_audio_term *iterm, int unitid,
-			      int readonly_mask)
+static void __build_feature_ctl(struct usb_mixer_interface *mixer,
+				const struct usbmix_name_map *imap,
+				unsigned int ctl_mask, int control,
+				struct usb_audio_term *iterm,
+				struct usb_audio_term *oterm,
+				int unitid, int nameid, int readonly_mask)
 {
-	struct uac_feature_unit_descriptor *desc = raw_desc;
 	struct usb_feature_control_info *ctl_info;
 	unsigned int len = 0;
 	int mapped_name = 0;
-	int nameid = uac_feature_unit_iFeature(desc);
 	struct snd_kcontrol *kctl;
 	struct usb_mixer_elem_info *cval;
 	const struct usbmix_name_map *map;
@@ -1353,14 +1351,14 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
 		return;
 	}
 
-	map = find_map(state, unitid, control);
+	map = find_map(imap, unitid, control);
 	if (check_ignored_ctl(map))
 		return;
 
 	cval = kzalloc(sizeof(*cval), GFP_KERNEL);
 	if (!cval)
 		return;
-	snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
+	snd_usb_mixer_elem_init_std(&cval->head, mixer, unitid);
 	cval->control = control;
 	cval->cmask = ctl_mask;
 
@@ -1369,7 +1367,7 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
 		kfree(cval);
 		return;
 	}
-	if (state->mixer->protocol == UAC_VERSION_1)
+	if (mixer->protocol == UAC_VERSION_1)
 		cval->val_type = ctl_info->type;
 	else /* UAC_VERSION_2 */
 		cval->val_type = ctl_info->type_uac2 >= 0 ?
@@ -1398,7 +1396,7 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
 		kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
 
 	if (!kctl) {
-		usb_audio_err(state->chip, "cannot malloc kcontrol\n");
+		usb_audio_err(mixer->chip, "cannot malloc kcontrol\n");
 		kfree(cval);
 		return;
 	}
@@ -1407,7 +1405,7 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
 	len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
 	mapped_name = len != 0;
 	if (!len && nameid)
-		len = snd_usb_copy_string_desc(state->chip, nameid,
+		len = snd_usb_copy_string_desc(mixer->chip, nameid,
 				kctl->id.name, sizeof(kctl->id.name));
 
 	switch (control) {
@@ -1422,10 +1420,12 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
 		 * - otherwise, anonymous name.
 		 */
 		if (!len) {
-			len = get_term_name(state->chip, iterm, kctl->id.name,
-					    sizeof(kctl->id.name), 1);
-			if (!len)
-				len = get_term_name(state->chip, &state->oterm,
+			if (iterm)
+				len = get_term_name(mixer->chip, iterm,
+						    kctl->id.name,
+						    sizeof(kctl->id.name), 1);
+			if (!len && oterm)
+				len = get_term_name(mixer->chip, oterm,
 						    kctl->id.name,
 						    sizeof(kctl->id.name), 1);
 			if (!len)
@@ -1434,15 +1434,15 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
 		}
 
 		if (!mapped_name)
-			check_no_speaker_on_headset(kctl, state->mixer->chip->card);
+			check_no_speaker_on_headset(kctl, mixer->chip->card);
 
 		/*
 		 * determine the stream direction:
 		 * if the connected output is USB stream, then it's likely a
 		 * capture stream.  otherwise it should be playback (hopefully :)
 		 */
-		if (!mapped_name && !(state->oterm.type >> 16)) {
-			if ((state->oterm.type & 0xff00) == 0x0100)
+		if (!mapped_name && oterm && !(oterm->type >> 16)) {
+			if ((oterm->type & 0xff00) == 0x0100)
 				append_ctl_name(kctl, " Capture");
 			else
 				append_ctl_name(kctl, " Playback");
@@ -1470,7 +1470,7 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
 		}
 	}
 
-	snd_usb_mixer_fu_apply_quirk(state->mixer, cval, unitid, kctl);
+	snd_usb_mixer_fu_apply_quirk(mixer, cval, unitid, kctl);
 
 	range = (cval->max - cval->min) / cval->res;
 	/*
@@ -1479,21 +1479,41 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
 	 * devices. It will definitively catch all buggy Logitech devices.
 	 */
 	if (range > 384) {
-		usb_audio_warn(state->chip,
+		usb_audio_warn(mixer->chip,
 			       "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.",
 			       range);
-		usb_audio_warn(state->chip,
+		usb_audio_warn(mixer->chip,
 			       "[%d] FU [%s] ch = %d, val = %d/%d/%d",
 			       cval->head.id, kctl->id.name, cval->channels,
 			       cval->min, cval->max, cval->res);
 	}
 
-	usb_audio_dbg(state->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
+	usb_audio_dbg(mixer->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
 		      cval->head.id, kctl->id.name, cval->channels,
 		      cval->min, cval->max, cval->res);
 	snd_usb_mixer_add_control(&cval->head, kctl);
 }
 
+static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
+			      unsigned int ctl_mask, int control,
+			      struct usb_audio_term *iterm, int unitid,
+			      int readonly_mask)
+{
+	struct uac_feature_unit_descriptor *desc = raw_desc;
+	int nameid = uac_feature_unit_iFeature(desc);
+
+	__build_feature_ctl(state->mixer, state->map, ctl_mask, control,
+			iterm, &state->oterm, unitid, nameid, readonly_mask);
+}
+
+static void build_feature_ctl_badd(struct usb_mixer_interface *mixer,
+			      unsigned int ctl_mask, int control, int unitid,
+			      const struct usbmix_name_map *badd_map)
+{
+	__build_feature_ctl(mixer, badd_map, ctl_mask, control,
+			NULL, NULL, unitid, 0, 0);
+}
+
 static void get_connector_control_name(struct mixer_build *state,
 				       struct usb_audio_term *term,
 				       bool is_input, char *name, int name_size)
@@ -1807,7 +1827,7 @@ static void build_mixer_unit_ctl(struct mixer_build *state,
 	struct snd_kcontrol *kctl;
 	const struct usbmix_name_map *map;
 
-	map = find_map(state, unitid, 0);
+	map = find_map(state->map, unitid, 0);
 	if (check_ignored_ctl(map))
 		return;
 
@@ -2106,7 +2126,7 @@ static int build_audio_procunit(struct mixer_build *state, int unitid,
 
 		if (!(controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
 			continue;
-		map = find_map(state, unitid, valinfo->control);
+		map = find_map(state->map, unitid, valinfo->control);
 		if (check_ignored_ctl(map))
 			continue;
 		cval = kzalloc(sizeof(*cval), GFP_KERNEL);
@@ -2310,7 +2330,7 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
 	if (desc->bNrInPins == 1) /* only one ? nonsense! */
 		return 0;
 
-	map = find_map(state, unitid, 0);
+	map = find_map(state->map, unitid, 0);
 	if (check_ignored_ctl(map))
 		return 0;
 
@@ -2497,6 +2517,246 @@ static int snd_usb_mixer_dev_free(struct snd_device *device)
 	return 0;
 }
 
+/* UAC3 predefined channels configuration */
+struct uac3_badd_profile {
+	int subclass;
+	const char *name;
+	int c_chmask;	/* capture channels mask */
+	int p_chmask;	/* playback channels mask */
+	int st_chmask;	/* side tone mixing channel mask */
+};
+
+static struct uac3_badd_profile uac3_badd_profiles[] = {
+	{
+		/*
+		 * BAIF, BAOF or combination of both
+		 * IN: Mono or Stereo cfg, Mono alt possible
+		 * OUT: Mono or Stereo cfg, Mono alt possible
+		 */
+		.subclass = UAC3_FUNCTION_SUBCLASS_GENERIC_IO,
+		.name = "GENERIC IO",
+		.c_chmask = -1,		/* dynamic channels */
+		.p_chmask = -1,		/* dynamic channels */
+	},
+	{
+		/* BAOF; Stereo only cfg, Mono alt possible */
+		.subclass = UAC3_FUNCTION_SUBCLASS_HEADPHONE,
+		.name = "HEADPHONE",
+		.p_chmask = 3,
+	},
+	{
+		/* BAOF; Mono or Stereo cfg, Mono alt possible */
+		.subclass = UAC3_FUNCTION_SUBCLASS_SPEAKER,
+		.name = "SPEAKER",
+		.p_chmask = -1,		/* dynamic channels */
+	},
+	{
+		/* BAIF; Mono or Stereo cfg, Mono alt possible */
+		.subclass = UAC3_FUNCTION_SUBCLASS_MICROPHONE,
+		.name = "MICROPHONE",
+		.c_chmask = -1,		/* dynamic channels */
+	},
+	{
+		/*
+		 * BAIOF topology
+		 * IN: Mono only
+		 * OUT: Mono or Stereo cfg, Mono alt possible
+		 */
+		.subclass = UAC3_FUNCTION_SUBCLASS_HEADSET,
+		.name = "HEADSET",
+		.c_chmask = 1,
+		.p_chmask = -1,		/* dynamic channels */
+		.st_chmask = 1,
+	},
+	{
+		/* BAIOF; IN: Mono only; OUT: Stereo only, Mono alt possible */
+		.subclass = UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER,
+		.name = "HEADSET ADAPTER",
+		.c_chmask = 1,
+		.p_chmask = 3,
+		.st_chmask = 1,
+	},
+	{
+		/* BAIF + BAOF; IN: Mono only; OUT: Mono only */
+		.subclass = UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE,
+		.name = "SPEAKERPHONE",
+		.c_chmask = 1,
+		.p_chmask = 1,
+	},
+	{ 0 } /* terminator */
+};
+
+static bool uac3_badd_func_has_valid_channels(struct usb_mixer_interface *mixer,
+					      struct uac3_badd_profile *f,
+					      int c_chmask, int p_chmask)
+{
+	/*
+	 * If both playback/capture channels are dynamic, make sure
+	 * at least one channel is present
+	 */
+	if (f->c_chmask < 0 && f->p_chmask < 0) {
+		if (!c_chmask && !p_chmask) {
+			usb_audio_warn(mixer->chip, "BAAD %s: no channels?",
+				       f->name);
+			return false;
+		}
+		return true;
+	}
+
+	if ((f->c_chmask < 0 && !c_chmask) ||
+	    (f->c_chmask >= 0 && f->c_chmask != c_chmask)) {
+		usb_audio_warn(mixer->chip, "BAAD %s c_chmask mismatch",
+			       f->name);
+		return false;
+	}
+	if ((f->p_chmask < 0 && !p_chmask) ||
+	    (f->p_chmask >= 0 && f->p_chmask != p_chmask)) {
+		usb_audio_warn(mixer->chip, "BAAD %s p_chmask mismatch",
+			       f->name);
+		return false;
+	}
+	return true;
+}
+
+/*
+ * create mixer controls for UAC3 BADD profiles
+ *
+ * UAC3 BADD device doesn't contain CS descriptors thus we will guess everything
+ *
+ * BADD device may contain Mixer Unit, which doesn't have any controls, skip it
+ */
+static int snd_usb_mixer_controls_badd(struct usb_mixer_interface *mixer,
+				       int ctrlif)
+{
+	struct usb_device *dev = mixer->chip->dev;
+	struct usb_interface_assoc_descriptor *assoc;
+	int badd_profile = mixer->chip->badd_profile;
+	struct uac3_badd_profile *f;
+	const struct usbmix_ctl_map *map;
+	int p_chmask = 0, c_chmask = 0, st_chmask = 0;
+	int i;
+
+	assoc = usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
+
+	/* Detect BADD capture/playback channels from AS EP descriptors */
+	for (i = 0; i < assoc->bInterfaceCount; i++) {
+		int intf = assoc->bFirstInterface + i;
+
+		struct usb_interface *iface;
+		struct usb_host_interface *alts;
+		struct usb_interface_descriptor *altsd;
+		unsigned int maxpacksize;
+		char dir_in;
+		int chmask, num;
+
+		if (intf == ctrlif)
+			continue;
+
+		iface = usb_ifnum_to_if(dev, intf);
+		num = iface->num_altsetting;
+
+		if (num < 2)
+			return -EINVAL;
+
+		/*
+		 * The number of Channels in an AudioStreaming interface
+		 * and the audio sample bit resolution (16 bits or 24
+		 * bits) can be derived from the wMaxPacketSize field in
+		 * the Standard AS Audio Data Endpoint descriptor in
+		 * Alternate Setting 1
+		 */
+		alts = &iface->altsetting[1];
+		altsd = get_iface_desc(alts);
+
+		if (altsd->bNumEndpoints < 1)
+			return -EINVAL;
+
+		/* check direction */
+		dir_in = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN);
+		maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
+
+		switch (maxpacksize) {
+		default:
+			usb_audio_err(mixer->chip,
+				"incorrect wMaxPacketSize 0x%x for BADD profile\n",
+				maxpacksize);
+			return -EINVAL;
+		case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16:
+		case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16:
+		case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24:
+		case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24:
+			chmask = 1;
+			break;
+		case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16:
+		case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16:
+		case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24:
+		case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24:
+			chmask = 3;
+			break;
+		}
+
+		if (dir_in)
+			c_chmask = chmask;
+		else
+			p_chmask = chmask;
+	}
+
+	usb_audio_dbg(mixer->chip,
+		"UAC3 BADD profile 0x%x: detected c_chmask=%d p_chmask=%d\n",
+		badd_profile, c_chmask, p_chmask);
+
+	/* check the mapping table */
+	for (map = uac3_badd_usbmix_ctl_maps; map->id; map++) {
+		if (map->id == badd_profile)
+			break;
+	}
+
+	if (!map->id)
+		return -EINVAL;
+
+	for (f = uac3_badd_profiles; f->name; f++) {
+		if (badd_profile == f->subclass)
+			break;
+	}
+	if (!f->name)
+		return -EINVAL;
+	if (!uac3_badd_func_has_valid_channels(mixer, f, c_chmask, p_chmask))
+		return -EINVAL;
+	st_chmask = f->st_chmask;
+
+	/* Playback */
+	if (p_chmask) {
+		/* Master channel, always writable */
+		build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE,
+				       UAC3_BADD_FU_ID2, map->map);
+		/* Mono/Stereo volume channels, always writable */
+		build_feature_ctl_badd(mixer, p_chmask, UAC_FU_VOLUME,
+				       UAC3_BADD_FU_ID2, map->map);
+	}
+
+	/* Capture */
+	if (c_chmask) {
+		/* Master channel, always writable */
+		build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE,
+				       UAC3_BADD_FU_ID5, map->map);
+		/* Mono/Stereo volume channels, always writable */
+		build_feature_ctl_badd(mixer, c_chmask, UAC_FU_VOLUME,
+				       UAC3_BADD_FU_ID5, map->map);
+	}
+
+	/* Side tone-mixing */
+	if (st_chmask) {
+		/* Master channel, always writable */
+		build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE,
+				       UAC3_BADD_FU_ID7, map->map);
+		/* Mono volume channel, always writable */
+		build_feature_ctl_badd(mixer, 1, UAC_FU_VOLUME,
+				       UAC3_BADD_FU_ID7, map->map);
+	}
+
+	return 0;
+}
+
 /*
  * create mixer controls
  *
@@ -2882,9 +3142,14 @@ int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
 		break;
 	}
 
-	if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
-	    (err = snd_usb_mixer_status_create(mixer)) < 0)
+	if (mixer->protocol == UAC_VERSION_3 &&
+			chip->badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) {
+		if ((err = snd_usb_mixer_controls_badd(mixer, ctrlif)) < 0)
+			goto _error;
+	} else if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
+			(err = snd_usb_mixer_status_create(mixer)) < 0) {
 		goto _error;
+	}
 	err = create_keep_iface_ctl(mixer);
 	if (err < 0)
 		goto _error;
diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index eaa03acd4686..71069e110897 100644
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -485,3 +485,68 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
 	{ 0 } /* terminator */
 };
 
+/*
+ * Control map entries for UAC3 BADD profiles
+ */
+
+static struct usbmix_name_map uac3_badd_generic_io_map[] = {
+	{ UAC3_BADD_FU_ID2, "Generic Out Playback" },
+	{ UAC3_BADD_FU_ID5, "Generic In Capture" },
+	{ 0 }					/* terminator */
+};
+static struct usbmix_name_map uac3_badd_headphone_map[] = {
+	{ UAC3_BADD_FU_ID2, "Headphone Playback" },
+	{ 0 }					/* terminator */
+};
+static struct usbmix_name_map uac3_badd_speaker_map[] = {
+	{ UAC3_BADD_FU_ID2, "Speaker Playback" },
+	{ 0 }					/* terminator */
+};
+static struct usbmix_name_map uac3_badd_microphone_map[] = {
+	{ UAC3_BADD_FU_ID5, "Mic Capture" },
+	{ 0 }					/* terminator */
+};
+/* Covers also 'headset adapter' profile */
+static struct usbmix_name_map uac3_badd_headset_map[] = {
+	{ UAC3_BADD_FU_ID2, "Headset Playback" },
+	{ UAC3_BADD_FU_ID5, "Headset Capture" },
+	{ UAC3_BADD_FU_ID7, "Sidetone Mixing" },
+	{ 0 }					/* terminator */
+};
+static struct usbmix_name_map uac3_badd_speakerphone_map[] = {
+	{ UAC3_BADD_FU_ID2, "Speaker Playback" },
+	{ UAC3_BADD_FU_ID5, "Mic Capture" },
+	{ 0 }					/* terminator */
+};
+
+static struct usbmix_ctl_map uac3_badd_usbmix_ctl_maps[] = {
+	{
+		.id = UAC3_FUNCTION_SUBCLASS_GENERIC_IO,
+		.map = uac3_badd_generic_io_map,
+	},
+	{
+		.id = UAC3_FUNCTION_SUBCLASS_HEADPHONE,
+		.map = uac3_badd_headphone_map,
+	},
+	{
+		.id = UAC3_FUNCTION_SUBCLASS_SPEAKER,
+		.map = uac3_badd_speaker_map,
+	},
+	{
+		.id = UAC3_FUNCTION_SUBCLASS_MICROPHONE,
+		.map = uac3_badd_microphone_map,
+	},
+	{
+		.id = UAC3_FUNCTION_SUBCLASS_HEADSET,
+		.map = uac3_badd_headset_map,
+	},
+	{
+		.id = UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER,
+		.map = uac3_badd_headset_map,
+	},
+	{
+		.id = UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE,
+		.map = uac3_badd_speakerphone_map,
+	},
+	{ 0 } /* terminator */
+};
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index 764be07474a8..de8bbb304199 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -817,15 +817,67 @@ snd_usb_get_audioformat_uac3(struct snd_usb_audio *chip,
 	struct uac3_input_terminal_descriptor *input_term;
 	struct uac3_output_terminal_descriptor *output_term;
 	struct uac3_cluster_header_descriptor *cluster;
-	struct uac3_as_header_descriptor *as;
+	struct uac3_as_header_descriptor *as = NULL;
 	struct uac3_hc_descriptor_header hc_header;
 	struct snd_pcm_chmap_elem *chmap;
+	unsigned char badd_profile;
+	u64 badd_formats = 0;
 	unsigned int num_channels;
 	struct audioformat *fp;
 	u16 cluster_id, wLength;
 	int clock = 0;
 	int err;
 
+	badd_profile = chip->badd_profile;
+
+	if (badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) {
+		unsigned int maxpacksize =
+			le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
+
+		switch (maxpacksize) {
+		default:
+			dev_err(&dev->dev,
+				"%u:%d : incorrect wMaxPacketSize for BADD profile\n",
+				iface_no, altno);
+			return NULL;
+		case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16:
+		case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16:
+			badd_formats = SNDRV_PCM_FMTBIT_S16_LE;
+			num_channels = 1;
+			break;
+		case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24:
+		case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24:
+			badd_formats = SNDRV_PCM_FMTBIT_S24_3LE;
+			num_channels = 1;
+			break;
+		case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16:
+		case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16:
+			badd_formats = SNDRV_PCM_FMTBIT_S16_LE;
+			num_channels = 2;
+			break;
+		case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24:
+		case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24:
+			badd_formats = SNDRV_PCM_FMTBIT_S24_3LE;
+			num_channels = 2;
+			break;
+		}
+
+		chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
+		if (!chmap)
+			return ERR_PTR(-ENOMEM);
+
+		if (num_channels == 1) {
+			chmap->map[0] = SNDRV_CHMAP_MONO;
+		} else {
+			chmap->map[0] = SNDRV_CHMAP_FL;
+			chmap->map[1] = SNDRV_CHMAP_FR;
+		}
+
+		chmap->channels = num_channels;
+		clock = UAC3_BADD_CS_ID9;
+		goto found_clock;
+	}
+
 	as = snd_usb_find_csint_desc(alts->extra, alts->extralen,
 				     NULL, UAC_AS_GENERAL);
 	if (!as) {
@@ -931,16 +983,29 @@ found_clock:
 	if (!fp)
 		return ERR_PTR(-ENOMEM);
 
-	fp->attributes = parse_uac_endpoint_attributes(chip, alts,
-						       UAC_VERSION_3,
-						       iface_no);
 	fp->chmap = chmap;
 
-	/* ok, let's parse further... */
-	if (snd_usb_parse_audio_format_v3(chip, fp, as, stream) < 0) {
-		kfree(fp->rate_table);
-		kfree(fp);
-		return NULL;
+	if (badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) {
+		fp->attributes = 0; /* No attributes */
+
+		fp->fmt_type = UAC_FORMAT_TYPE_I;
+		fp->formats = badd_formats;
+
+		fp->nr_rates = 0;	/* SNDRV_PCM_RATE_CONTINUOUS */
+		fp->rate_min = UAC3_BADD_SAMPLING_RATE;
+		fp->rate_max = UAC3_BADD_SAMPLING_RATE;
+		fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
+
+	} else {
+		fp->attributes = parse_uac_endpoint_attributes(chip, alts,
+							       UAC_VERSION_3,
+							       iface_no);
+		/* ok, let's parse further... */
+		if (snd_usb_parse_audio_format_v3(chip, fp, as, stream) < 0) {
+			kfree(fp->rate_table);
+			kfree(fp);
+			return NULL;
+		}
 	}
 
 	return fp;
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index 1cb6b3e9483c..7b28cbde22c0 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -49,6 +49,8 @@ struct snd_usb_audio {
 	int num_suspended_intf;
 	int sample_rate_read_error;
 
+	int badd_profile;		/* UAC3 BADD profile */
+
 	struct list_head pcm_list;	/* list of pcm streams */
 	struct list_head ep_list;	/* list of audio-related endpoints */
 	int pcm_devs;