[PATCH] HID: input: map System Microphone Mute LED
flat view
COLD43d
From: ait <hidden>
Date: 2026-09-04 02:44:21
Also in:
linux-api
Subsystem:
hid core layer, input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Jiri Kosina, Benjamin Tissoires, Dmitry Torokhov, Linus Torvalds
From: Jonathan Jansen <redacted> 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 <redacted> --- 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)
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2.51.0