* [PATCH] HID: input: map System Microphone Mute LED
@ 2026-09-04 2:29 ait
2026-09-04 4:47 ` [PATCH v2] " Jonathan Jansen
0 siblings, 1 reply; 2+ messages in thread
From: ait @ 2026-09-04 2:29 UTC (permalink / raw)
To: ait
Cc: Jonathan Jansen, Jiri Kosina, Benjamin Tissoires, Dmitry Torokhov,
linux-input, linux-api, Your Name
From: Jonathan Jansen <jonathanjansen@ait.place>
HUTRR110 (approved 2022, part of HID Usage Tables since v1.4) defines:
Generic Desktop (0x01) 0xa9 System Microphone Mute OOC (input)
LED Page (0x08) 0x57 System Microphone Mute OOC (output)
The input usage already maps to KEY_MICMUTE, so the button works on
HUTRR110 devices. The LED output usage is ignored, though, so the
indicator stays dark and userspace depends on per-vendor hacks
(hid-lenovo, hid-lg-g15, hid-playstation, hid-plantronics) or platform
drivers instead.
Map LED page usage 0x57 to a new LED_MICMUTE input LED. It shows up
as /sys/class/leds/inputN::micmute with the "audio-micmute" trigger
that snd-ctl-led registers, so the LED tracks the audio stack's
system-wide microphone mute state, like the existing "Mute" (LED page
0x09) mapping does for speaker mute.
LED_MICMUTE takes the next free input LED code (0x0b, below LED_MAX
0x0f), so nothing existing breaks.
Link: https://www.usb.org/sites/default/files/hutrr110-systemmicrophonemute.pdf
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <bentiss@kernel.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-input@vger.kernel.org
Cc: linux-api@vger.kernel.org
Signed-off-by: Your Name <you@example.com>
---
drivers/hid/hid-debug.c | 2 +-
drivers/hid/hid-input.c | 1 +
drivers/input/input-leds.c | 1 +
include/uapi/linux/input-event-codes.h | 1 +
4 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/hid-debug.c b/drivers/hid/hid-debug.c
index f44e6e708..92a950105 100644
--- a/drivers/hid/hid-debug.c
+++ b/drivers/hid/hid-debug.c
@@ -3550,7 +3550,7 @@ static const char *leds[LED_MAX + 1] = {
[LED_KANA] = "Kana", [LED_SLEEP] = "Sleep",
[LED_SUSPEND] = "Suspend", [LED_MUTE] = "Mute",
[LED_MISC] = "Misc", [LED_MAIL] = "Mail",
- [LED_CHARGING] = "Charging",
+ [LED_CHARGING] = "Charging", [LED_MICMUTE] = "Mic Mute",
};
static const char *repeats[REP_MAX + 1] = {
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index edd6bbf83..727374dd5 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -990,6 +990,7 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
case 0x09: map_led (LED_MUTE); break; /* "Mute" */
+ case 0x57: map_led (LED_MICMUTE); break; /* "System Microphone Mute" */
case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
diff --git a/drivers/input/input-leds.c b/drivers/input/input-leds.c
index b08d1d08d..6522079a4 100644
--- a/drivers/input/input-leds.c
+++ b/drivers/input/input-leds.c
@@ -36,6 +36,7 @@ static const struct {
[LED_SLEEP] = { "sleep" } ,
[LED_SUSPEND] = { "suspend" },
[LED_MUTE] = { "mute", AUDIO_TRIGGER("audio-mute") },
+ [LED_MICMUTE] = { "micmute", AUDIO_TRIGGER("audio-micmute") },
[LED_MISC] = { "misc" },
[LED_MAIL] = { "mail" },
[LED_CHARGING] = { "charging" },
diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index 3528168f7..bc374821c 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h
@@ -983,6 +983,7 @@
#define LED_MISC 0x08
#define LED_MAIL 0x09
#define LED_CHARGING 0x0a
+#define LED_MICMUTE 0x0b
#define LED_MAX 0x0f
#define LED_CNT (LED_MAX+1)
--
2.51.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH v2] HID: input: map System Microphone Mute LED
2026-09-04 2:29 [PATCH] HID: input: map System Microphone Mute LED ait
@ 2026-09-04 4:47 ` Jonathan Jansen
0 siblings, 0 replies; 2+ messages in thread
From: Jonathan Jansen @ 2026-09-04 4:47 UTC (permalink / raw)
To: linux-input
Cc: linux-kernel, jikos, bentiss, dmitry.torokhov, linux-api,
jonathanjansen
HUTRR110 defines LED page usage 0x57 as System Microphone Mute.
The usage is currently ignored, so the indicator stays dark and
userspace falls back to per-vendor code in hid-lenovo,
hid-playstation, hid-plantronics.
Map it to a new LED_MICMUTE. It appears as
/sys/class/leds/inputN::micmute and uses the "audio-micmute"
trigger from snd-ctl-led, so the LED follows the system-wide
mic mute state the same way LED_MUTE (page 0x09) already does
for speaker mute.
LED_MICMUTE takes the next free code (0x0b).
Link: https://www.usb.org/sites/default/files/hutrr110-systemmicrophonemute.pdf
Signed-off-by: Jonathan Jansen <jonathanjansen@ait.place>
---
Notes:
Changes since v1: rewrote the commit message; no functional changes.
drivers/hid/hid-debug.c | 2 +-
drivers/hid/hid-input.c | 1 +
drivers/input/input-leds.c | 1 +
include/uapi/linux/input-event-codes.h | 1 +
4 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/hid-debug.c b/drivers/hid/hid-debug.c
index f44e6e708..92a950105 100644
--- a/drivers/hid/hid-debug.c
+++ b/drivers/hid/hid-debug.c
@@ -3550,7 +3550,7 @@ static const char *leds[LED_MAX + 1] = {
[LED_KANA] = "Kana", [LED_SLEEP] = "Sleep",
[LED_SUSPEND] = "Suspend", [LED_MUTE] = "Mute",
[LED_MISC] = "Misc", [LED_MAIL] = "Mail",
- [LED_CHARGING] = "Charging",
+ [LED_CHARGING] = "Charging", [LED_MICMUTE] = "Mic Mute",
};
static const char *repeats[REP_MAX + 1] = {
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index edd6bbf83..727374dd5 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -990,6 +990,7 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */
case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */
case 0x09: map_led (LED_MUTE); break; /* "Mute" */
+ case 0x57: map_led (LED_MICMUTE); break; /* "System Microphone Mute" */
case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */
case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */
case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */
diff --git a/drivers/input/input-leds.c b/drivers/input/input-leds.c
index b08d1d08d..6522079a4 100644
--- a/drivers/input/input-leds.c
+++ b/drivers/input/input-leds.c
@@ -36,6 +36,7 @@ static const struct {
[LED_SLEEP] = { "sleep" } ,
[LED_SUSPEND] = { "suspend" },
[LED_MUTE] = { "mute", AUDIO_TRIGGER("audio-mute") },
+ [LED_MICMUTE] = { "micmute", AUDIO_TRIGGER("audio-micmute") },
[LED_MISC] = { "misc" },
[LED_MAIL] = { "mail" },
[LED_CHARGING] = { "charging" },
diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index 3528168f7..bc374821c 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h
@@ -983,6 +983,7 @@
#define LED_MISC 0x08
#define LED_MAIL 0x09
#define LED_CHARGING 0x0a
+#define LED_MICMUTE 0x0b
#define LED_MAX 0x0f
#define LED_CNT (LED_MAX+1)
--
2.55.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
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