[PATCH 0/2] ALSA: usb-audio: Insertion Control for BADD Adaptors.

[PATCH 0/2] ALSA: usb-audio: Insertion Control for BADD Adaptors.

[Jorge Sanjuan]

This patchset adds support for the Insertion Control for BADD devices (subset of UAC3).

This control is only pressent in the HEADSET ADAPTER BADD profile. The USB interrupt pipe
shall be present for this profile so the status pipe creation should also happen for BADD
devices.

Also, the bi-directional type codes have been defined so they can be used as inferred values
for the Input and Output terminals for this adapter profile.

-- 
Based on tag: next-20180612

Jorge Sanjuan (2):
  ALSA: usb-audio: Add bi-directional terminal types.
  ALSA: usb-audio: UAC3. Add insertion control for BADD.

 include/uapi/linux/usb/audio.h |  8 ++++++++
 sound/usb/mixer.c              | 45 ++++++++++++++++++++++++++++++------------
 2 files changed, 40 insertions(+), 13 deletions(-)

-- 
2.11.0

[PATCH 1/2] ALSA: usb-audio: Add bi-directional terminal types.

[Jorge Sanjuan]

Define the bi-directional USB terminal types for audio devices.

Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
---
 include/uapi/linux/usb/audio.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/uapi/linux/usb/audio.h b/include/uapi/linux/usb/audio.h
index 13d98e6e0db1..74e520fb944f 100644
--- a/include/uapi/linux/usb/audio.h
+++ b/include/uapi/linux/usb/audio.h
@@ -230,6 +230,14 @@ struct uac1_output_terminal_descriptor {
 #define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER	0x306
 #define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER	0x307
 
+/* Terminals - 2.4 Bi-directional Terminal Types */
+#define UAC_BIDIR_TERMINAL_UNDEFINED			0x400
+#define UAC_BIDIR_TERMINAL_HANDSET			0x401
+#define UAC_BIDIR_TERMINAL_HEADSET			0x402
+#define UAC_BIDIR_TERMINAL_SPEAKER_PHONE		0x403
+#define UAC_BIDIR_TERMINAL_ECHO_SUPPRESSING		0x404
+#define UAC_BIDIR_TERMINAL_ECHO_CANCELING		0x405
+
 /* Set bControlSize = 2 as default setting */
 #define UAC_DT_FEATURE_UNIT_SIZE(ch)		(7 + ((ch) + 1) * 2)
 
-- 
2.11.0

[PATCH 2/2] ALSA: usb-audio: UAC3. Add insertion control for BADD.

[Jorge Sanjuan]

The HEADSET ADAPTER profile for BADD devices is meant to support
Insertion Control for the Input and Output Terminals of the headset.
Furthermore, this profile may also include the interrupt status pipe
to report changes on these terminals.

This patch creates the jack-detect controls for the Headset Adapter
profile and enables the interrupt status pipe creation for BADD devices.

Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
---
 sound/usb/mixer.c | 45 ++++++++++++++++++++++++++++++++-------------
 1 file changed, 32 insertions(+), 13 deletions(-)

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 898afd3001ea..b1dcf6dfc27e 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -1653,11 +1653,11 @@ static void build_feature_ctl_badd(struct usb_mixer_interface *mixer,
 			NULL, NULL, unitid, 0, 0);
 }
 
-static void get_connector_control_name(struct mixer_build *state,
+static void get_connector_control_name(struct usb_mixer_interface *mixer,
 				       struct usb_audio_term *term,
 				       bool is_input, char *name, int name_size)
 {
-	int name_len = get_term_name(state->chip, term, name, name_size, 0);
+	int name_len = get_term_name(mixer->chip, term, name, name_size, 0);
 
 	if (name_len == 0)
 		strlcpy(name, "Unknown", name_size);
@@ -1674,7 +1674,7 @@ static void get_connector_control_name(struct mixer_build *state,
 }
 
 /* Build a mixer control for a UAC connector control (jack-detect) */
-static void build_connector_control(struct mixer_build *state,
+static void build_connector_control(struct usb_mixer_interface *mixer,
 				    struct usb_audio_term *term, bool is_input)
 {
 	struct snd_kcontrol *kctl;
@@ -1683,7 +1683,7 @@ static void build_connector_control(struct mixer_build *state,
 	cval = kzalloc(sizeof(*cval), GFP_KERNEL);
 	if (!cval)
 		return;
-	snd_usb_mixer_elem_init_std(&cval->head, state->mixer, term->id);
+	snd_usb_mixer_elem_init_std(&cval->head, mixer, term->id);
 	/*
 	 * UAC2: The first byte from reading the UAC2_TE_CONNECTOR control returns the
 	 * number of channels connected.
@@ -1694,7 +1694,7 @@ static void build_connector_control(struct mixer_build *state,
 	 * This boolean ctl will simply report if any channels are connected
 	 * or not.
 	 */
-	if (state->mixer->protocol == UAC_VERSION_2)
+	if (mixer->protocol == UAC_VERSION_2)
 		cval->control = UAC2_TE_CONNECTOR;
 	else /* UAC_VERSION_3 */
 		cval->control = UAC3_TE_INSERTION;
@@ -1705,11 +1705,11 @@ static void build_connector_control(struct mixer_build *state,
 	cval->max = 1;
 	kctl = snd_ctl_new1(&usb_connector_ctl_ro, cval);
 	if (!kctl) {
-		usb_audio_err(state->chip, "cannot malloc kcontrol\n");
+		usb_audio_err(mixer->chip, "cannot malloc kcontrol\n");
 		kfree(cval);
 		return;
 	}
-	get_connector_control_name(state, term, is_input, kctl->id.name,
+	get_connector_control_name(mixer, term, is_input, kctl->id.name,
 				   sizeof(kctl->id.name));
 	kctl->private_free = snd_usb_mixer_elem_free;
 	snd_usb_mixer_add_control(&cval->head, kctl);
@@ -2042,7 +2042,7 @@ static int parse_audio_input_terminal(struct mixer_build *state, int unitid,
 
 	/* Check for jack detection. */
 	if (uac_v2v3_control_is_readable(bmctls, control))
-		build_connector_control(state, &iterm, true);
+		build_connector_control(state->mixer, &iterm, true);
 
 	return 0;
 }
@@ -2918,6 +2918,23 @@ static int snd_usb_mixer_controls_badd(struct usb_mixer_interface *mixer,
 				       UAC3_BADD_FU_ID7, map->map);
 	}
 
+	/* Insertion Control */
+	if (f->subclass == UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER) {
+		struct usb_audio_term iterm, oterm;
+
+		/* Input Term - Insertion control */
+		memset(&iterm, 0, sizeof(iterm));
+		iterm.id = UAC3_BADD_IT_ID4;
+		iterm.type = UAC_BIDIR_TERMINAL_HEADSET;
+		build_connector_control(mixer, &iterm, true);
+
+		/* Output Term - Insertion control */
+		memset(&oterm, 0, sizeof(oterm));
+		oterm.id = UAC3_BADD_OT_ID3;
+		oterm.type = UAC_BIDIR_TERMINAL_HEADSET;
+		build_connector_control(mixer, &oterm, false);
+	}
+
 	return 0;
 }
 
@@ -2990,7 +3007,7 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
 
 			if (uac_v2v3_control_is_readable(le16_to_cpu(desc->bmControls),
 							 UAC2_TE_CONNECTOR)) {
-				build_connector_control(&state, &state.oterm,
+				build_connector_control(state.mixer, &state.oterm,
 							false);
 			}
 		} else {  /* UAC_VERSION_3 */
@@ -3017,7 +3034,7 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
 
 			if (uac_v2v3_control_is_readable(le32_to_cpu(desc->bmControls),
 							 UAC3_TE_INSERTION)) {
-				build_connector_control(&state, &state.oterm,
+				build_connector_control(state.mixer, &state.oterm,
 							false);
 			}
 		}
@@ -3321,10 +3338,12 @@ int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
 		err = snd_usb_mixer_controls(mixer);
 		if (err < 0)
 			goto _error;
-		err = snd_usb_mixer_status_create(mixer);
-		if (err < 0)
-			goto _error;
 	}
+
+	err = snd_usb_mixer_status_create(mixer);
+	if (err < 0)
+		goto _error;
+
 	err = create_keep_iface_ctl(mixer);
 	if (err < 0)
 		goto _error;
-- 
2.11.0

Re: [PATCH 2/2] ALSA: usb-audio: UAC3. Add insertion control for BADD.

[Takashi Iwai]

On Tue, 12 Jun 2018 16:32:01 +0200,
Jorge Sanjuan wrote:
> 
> The HEADSET ADAPTER profile for BADD devices is meant to support
> Insertion Control for the Input and Output Terminals of the headset.
> Furthermore, this profile may also include the interrupt status pipe
> to report changes on these terminals.
> 
> This patch creates the jack-detect controls for the Headset Adapter
> profile and enables the interrupt status pipe creation for BADD devices.
> 
> Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>

The changes look good, but I'd prefer splitting this:

- A preliminary work to change get_connector_control_name() and
  build_connector_control() to receive usb_mixer_interface;
  this is no functional change

- Add build_connector_control() calls for UAC3 BADD

- Apply snd_usb_mixer_status_create() for UAC3 BADD, too
  

thanks,

Takashi

[PATCH v2 0/4] ALSA: usb-audio: Insertion Control for BADD Adaptors.

[Jorge Sanjuan]

Thanks for review!

Here is what's new in this V2:
 - Split the patchset into a more sensible series.

This patchset adds support for the Insertion Control for BADD devices
(subset of UAC3).

This control is only pressent in the HEADSET ADAPTER BADD profile. The USB
interrupt pipe shall be present for this profile so the status pipe
creation should also happen for BADD devices.

Also, the bi-directional type codes have been defined so they can be used
as inferred values for the Input and Output terminals for this adapter
profile.

Based on tag: next-20180612

Jorge Sanjuan (4):
  ALSA: usb-audio: Add bi-directional terminal types.
  ALSA: usb-audio: Change in connectors control creation interface
  ALSA: usb-audio: UAC3. Add insertion control for BADD.
  ALSA: usb-audio: Always create the interrupt pipe for the mixer

 include/uapi/linux/usb/audio.h |  8 ++++++++
 sound/usb/mixer.c              | 45 ++++++++++++++++++++++++++++++------------
 2 files changed, 40 insertions(+), 13 deletions(-)

-- 
2.11.0

[PATCH v2 1/4] ALSA: usb-audio: Add bi-directional terminal types.

[Jorge Sanjuan]

Define the bi-directional USB terminal types for audio devices.

Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
---
 include/uapi/linux/usb/audio.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/uapi/linux/usb/audio.h b/include/uapi/linux/usb/audio.h
index 13d98e6e0db1..74e520fb944f 100644
--- a/include/uapi/linux/usb/audio.h
+++ b/include/uapi/linux/usb/audio.h
@@ -230,6 +230,14 @@ struct uac1_output_terminal_descriptor {
 #define UAC_OUTPUT_TERMINAL_COMMUNICATION_SPEAKER	0x306
 #define UAC_OUTPUT_TERMINAL_LOW_FREQ_EFFECTS_SPEAKER	0x307
 
+/* Terminals - 2.4 Bi-directional Terminal Types */
+#define UAC_BIDIR_TERMINAL_UNDEFINED			0x400
+#define UAC_BIDIR_TERMINAL_HANDSET			0x401
+#define UAC_BIDIR_TERMINAL_HEADSET			0x402
+#define UAC_BIDIR_TERMINAL_SPEAKER_PHONE		0x403
+#define UAC_BIDIR_TERMINAL_ECHO_SUPPRESSING		0x404
+#define UAC_BIDIR_TERMINAL_ECHO_CANCELING		0x405
+
 /* Set bControlSize = 2 as default setting */
 #define UAC_DT_FEATURE_UNIT_SIZE(ch)		(7 + ((ch) + 1) * 2)
 
-- 
2.11.0

[PATCH v2 2/4] ALSA: usb-audio: Change in connectors control creation interface

[Jorge Sanjuan]

Change build_connector_control() and get_connector_control_name()
so they take `struct usb_mixer_interface` as input argument instead
of `struct mixer_build`.

This is preliminary work to add support for connectors control
for UAC3 BADD devices. No functional change.

Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
---
 sound/usb/mixer.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 898afd3001ea..34fef71e0330 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -1653,11 +1653,11 @@ static void build_feature_ctl_badd(struct usb_mixer_interface *mixer,
 			NULL, NULL, unitid, 0, 0);
 }
 
-static void get_connector_control_name(struct mixer_build *state,
+static void get_connector_control_name(struct usb_mixer_interface *mixer,
 				       struct usb_audio_term *term,
 				       bool is_input, char *name, int name_size)
 {
-	int name_len = get_term_name(state->chip, term, name, name_size, 0);
+	int name_len = get_term_name(mixer->chip, term, name, name_size, 0);
 
 	if (name_len == 0)
 		strlcpy(name, "Unknown", name_size);
@@ -1674,7 +1674,7 @@ static void get_connector_control_name(struct mixer_build *state,
 }
 
 /* Build a mixer control for a UAC connector control (jack-detect) */
-static void build_connector_control(struct mixer_build *state,
+static void build_connector_control(struct usb_mixer_interface *mixer,
 				    struct usb_audio_term *term, bool is_input)
 {
 	struct snd_kcontrol *kctl;
@@ -1683,7 +1683,7 @@ static void build_connector_control(struct mixer_build *state,
 	cval = kzalloc(sizeof(*cval), GFP_KERNEL);
 	if (!cval)
 		return;
-	snd_usb_mixer_elem_init_std(&cval->head, state->mixer, term->id);
+	snd_usb_mixer_elem_init_std(&cval->head, mixer, term->id);
 	/*
 	 * UAC2: The first byte from reading the UAC2_TE_CONNECTOR control returns the
 	 * number of channels connected.
@@ -1694,7 +1694,7 @@ static void build_connector_control(struct mixer_build *state,
 	 * This boolean ctl will simply report if any channels are connected
 	 * or not.
 	 */
-	if (state->mixer->protocol == UAC_VERSION_2)
+	if (mixer->protocol == UAC_VERSION_2)
 		cval->control = UAC2_TE_CONNECTOR;
 	else /* UAC_VERSION_3 */
 		cval->control = UAC3_TE_INSERTION;
@@ -1705,11 +1705,11 @@ static void build_connector_control(struct mixer_build *state,
 	cval->max = 1;
 	kctl = snd_ctl_new1(&usb_connector_ctl_ro, cval);
 	if (!kctl) {
-		usb_audio_err(state->chip, "cannot malloc kcontrol\n");
+		usb_audio_err(mixer->chip, "cannot malloc kcontrol\n");
 		kfree(cval);
 		return;
 	}
-	get_connector_control_name(state, term, is_input, kctl->id.name,
+	get_connector_control_name(mixer, term, is_input, kctl->id.name,
 				   sizeof(kctl->id.name));
 	kctl->private_free = snd_usb_mixer_elem_free;
 	snd_usb_mixer_add_control(&cval->head, kctl);
@@ -2042,7 +2042,7 @@ static int parse_audio_input_terminal(struct mixer_build *state, int unitid,
 
 	/* Check for jack detection. */
 	if (uac_v2v3_control_is_readable(bmctls, control))
-		build_connector_control(state, &iterm, true);
+		build_connector_control(state->mixer, &iterm, true);
 
 	return 0;
 }
@@ -2990,7 +2990,7 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
 
 			if (uac_v2v3_control_is_readable(le16_to_cpu(desc->bmControls),
 							 UAC2_TE_CONNECTOR)) {
-				build_connector_control(&state, &state.oterm,
+				build_connector_control(state.mixer, &state.oterm,
 							false);
 			}
 		} else {  /* UAC_VERSION_3 */
@@ -3017,7 +3017,7 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
 
 			if (uac_v2v3_control_is_readable(le32_to_cpu(desc->bmControls),
 							 UAC3_TE_INSERTION)) {
-				build_connector_control(&state, &state.oterm,
+				build_connector_control(state.mixer, &state.oterm,
 							false);
 			}
 		}
-- 
2.11.0

[PATCH v2 3/4] ALSA: usb-audio: UAC3. Add insertion control for BADD.

[Jorge Sanjuan]

The HEADSET ADAPTER profile for BADD devices is meant to support
Insertion Control for the Input and Output Terminals of the headset.

This patch defines the BADD inferred input and output terminals and
builds the connector controls.

Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
---
 sound/usb/mixer.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 34fef71e0330..03b8a2ac93c8 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -2918,6 +2918,23 @@ static int snd_usb_mixer_controls_badd(struct usb_mixer_interface *mixer,
 				       UAC3_BADD_FU_ID7, map->map);
 	}
 
+	/* Insertion Control */
+	if (f->subclass == UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER) {
+		struct usb_audio_term iterm, oterm;
+
+		/* Input Term - Insertion control */
+		memset(&iterm, 0, sizeof(iterm));
+		iterm.id = UAC3_BADD_IT_ID4;
+		iterm.type = UAC_BIDIR_TERMINAL_HEADSET;
+		build_connector_control(mixer, &iterm, true);
+
+		/* Output Term - Insertion control */
+		memset(&oterm, 0, sizeof(oterm));
+		oterm.id = UAC3_BADD_OT_ID3;
+		oterm.type = UAC_BIDIR_TERMINAL_HEADSET;
+		build_connector_control(mixer, &oterm, false);
+	}
+
 	return 0;
 }
 
-- 
2.11.0

[PATCH v2 4/4] ALSA: usb-audio: Always create the interrupt pipe for the mixer

[Jorge Sanjuan]

An UAC3 BADD device may also include an interrupt status pipe
to report changes on the HEADSET ADAPTER terminals. The creation
of the status pipe is dependent on the device reporting that it
has it.

Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
---
 sound/usb/mixer.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 03b8a2ac93c8..b1dcf6dfc27e 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -3338,10 +3338,12 @@ int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
 		err = snd_usb_mixer_controls(mixer);
 		if (err < 0)
 			goto _error;
-		err = snd_usb_mixer_status_create(mixer);
-		if (err < 0)
-			goto _error;
 	}
+
+	err = snd_usb_mixer_status_create(mixer);
+	if (err < 0)
+		goto _error;
+
 	err = create_keep_iface_ctl(mixer);
 	if (err < 0)
 		goto _error;
-- 
2.11.0

Re: [PATCH v2 0/4] ALSA: usb-audio: Insertion Control for BADD Adaptors.

[Takashi Iwai]

On Thu, 14 Jun 2018 16:05:54 +0200,
Jorge Sanjuan wrote:
> 
> Thanks for review!
> 
> Here is what's new in this V2:
>  - Split the patchset into a more sensible series.
> 
> This patchset adds support for the Insertion Control for BADD devices
> (subset of UAC3).
> 
> This control is only pressent in the HEADSET ADAPTER BADD profile. The USB
> interrupt pipe shall be present for this profile so the status pipe
> creation should also happen for BADD devices.
> 
> Also, the bi-directional type codes have been defined so they can be used
> as inferred values for the Input and Output terminals for this adapter
> profile.
> 
> Based on tag: next-20180612
> 
> Jorge Sanjuan (4):
>   ALSA: usb-audio: Add bi-directional terminal types.
>   ALSA: usb-audio: Change in connectors control creation interface
>   ALSA: usb-audio: UAC3. Add insertion control for BADD.
>   ALSA: usb-audio: Always create the interrupt pipe for the mixer

Thanks, this looks nicer, each of changes is smaller and clearer.
Although it's a bit too late for the merge window, this is a change
that is fairly safe for the existing UAC1/UAC2, I merged it now.

Oh, and the subjects were slightly fixed; no need of period at the
tail in a subject line.


Takashi

Re: [PATCH v2 0/4] ALSA: usb-audio: Insertion Control for BADD Adaptors.

[Ruslan Bilovol]

On Thu, Jun 14, 2018 at 7:07 PM, Takashi Iwai <tiwai@suse.de> wrote:
> On Thu, 14 Jun 2018 16:05:54 +0200,
> Jorge Sanjuan wrote:
>>
>> Thanks for review!
>>
>> Here is what's new in this V2:
>>  - Split the patchset into a more sensible series.
>>
>> This patchset adds support for the Insertion Control for BADD devices
>> (subset of UAC3).
>>
>> This control is only pressent in the HEADSET ADAPTER BADD profile. The USB
>> interrupt pipe shall be present for this profile so the status pipe
>> creation should also happen for BADD devices.
>>
>> Also, the bi-directional type codes have been defined so they can be used
>> as inferred values for the Input and Output terminals for this adapter
>> profile.
>>
>> Based on tag: next-20180612
>>
>> Jorge Sanjuan (4):
>>   ALSA: usb-audio: Add bi-directional terminal types.
>>   ALSA: usb-audio: Change in connectors control creation interface
>>   ALSA: usb-audio: UAC3. Add insertion control for BADD.
>>   ALSA: usb-audio: Always create the interrupt pipe for the mixer
>
> Thanks, this looks nicer, each of changes is smaller and clearer.
> Although it's a bit too late for the merge window, this is a change
> that is fairly safe for the existing UAC1/UAC2, I merged it now.
>

It's too late probably, but I just finished reviewing these patches
and don't have any objections.

Thanks,
Ruslan

Re: [PATCH v2 0/4] ALSA: usb-audio: Insertion Control for BADD Adaptors.

[Takashi Iwai]

On Thu, 14 Jun 2018 21:18:10 +0200,
Ruslan Bilovol wrote:
> 
> On Thu, Jun 14, 2018 at 7:07 PM, Takashi Iwai <tiwai@suse.de> wrote:
> > On Thu, 14 Jun 2018 16:05:54 +0200,
> > Jorge Sanjuan wrote:
> >>
> >> Thanks for review!
> >>
> >> Here is what's new in this V2:
> >>  - Split the patchset into a more sensible series.
> >>
> >> This patchset adds support for the Insertion Control for BADD devices
> >> (subset of UAC3).
> >>
> >> This control is only pressent in the HEADSET ADAPTER BADD profile. The USB
> >> interrupt pipe shall be present for this profile so the status pipe
> >> creation should also happen for BADD devices.
> >>
> >> Also, the bi-directional type codes have been defined so they can be used
> >> as inferred values for the Input and Output terminals for this adapter
> >> profile.
> >>
> >> Based on tag: next-20180612
> >>
> >> Jorge Sanjuan (4):
> >>   ALSA: usb-audio: Add bi-directional terminal types.
> >>   ALSA: usb-audio: Change in connectors control creation interface
> >>   ALSA: usb-audio: UAC3. Add insertion control for BADD.
> >>   ALSA: usb-audio: Always create the interrupt pipe for the mixer
> >
> > Thanks, this looks nicer, each of changes is smaller and clearer.
> > Although it's a bit too late for the merge window, this is a change
> > that is fairly safe for the existing UAC1/UAC2, I merged it now.
> >
> 
> It's too late probably, but I just finished reviewing these patches
> and don't have any objections.

Yeah, I already pushed out.  But thanks for reviewing.


Takashi