* ucm2: Qualcomm: Thinkpad T14s speaker mute LED support
[not found] <alsa-project/alsa-ucm-conf/pr/880@alsa-project.org>
@ 2026-10-14 16:30 ` GitHub pull_request - opened
2026-10-14 17:05 ` GitHub pull_request - edited
1 sibling, 0 replies; 2+ messages in thread
From: GitHub pull_request - opened @ 2026-10-14 16:30 UTC (permalink / raw)
To: alsa-devel
alsa-project/alsa-ucm-conf pull request #880 was opened from sre:
The T14s Gen6 Snapdragon has an LED in the mute button to signal that the speaker is muted. The kernel driver for the embedded controller exposes it as `/sys/class/leds/platform::mute` with trigger set to `audio-mute`. At the same time the hardware toggles the LED state when the mute key is pressed (independent of the real audio state) giving a fake suggestion of things working correctly.
This series properly attaches the speaker mute state to this LED. To be functional, it depends on a kernel driver change for the speaker amplifier exposing a mute control knob. All handling has been implemented in a way, that using a kernel without this feature will continue to work as before.
I will update the PR description with a link to the kernel patch, once it has been send out.
Request URL : https://github.com/alsa-project/alsa-ucm-conf/pull/880
Patch URL : https://github.com/alsa-project/alsa-ucm-conf/pull/880.patch
Repository URL: https://github.com/alsa-project/alsa-ucm-conf
^ permalink raw reply [flat|nested] 2+ messages in thread
* ucm2: Qualcomm: Thinkpad T14s speaker mute LED support
[not found] <alsa-project/alsa-ucm-conf/pr/880@alsa-project.org>
2026-10-14 16:30 ` ucm2: Qualcomm: Thinkpad T14s speaker mute LED support GitHub pull_request - opened
@ 2026-10-14 17:05 ` GitHub pull_request - edited
1 sibling, 0 replies; 2+ messages in thread
From: GitHub pull_request - edited @ 2026-10-14 17:05 UTC (permalink / raw)
To: alsa-devel
alsa-project/alsa-ucm-conf pull request #880 was edited from sre:
The T14s Gen6 Snapdragon has an LED in the mute button to signal that the speaker is muted. The kernel driver for the embedded controller exposes it as `/sys/class/leds/platform::mute` with trigger set to `audio-mute`. At the same time the hardware toggles the LED state when the mute key is pressed (independent of the real audio state) giving a fake suggestion of things working correctly.
This series properly attaches the speaker mute state to this LED. To be functional, it depends on a kernel driver change for the speaker amplifier exposing a mute control knob. All handling has been implemented in a way, that using a kernel without this feature will continue to work as before.
Kernel Patch: https://lore.kernel.org/linux-sound/20261014-wsa884x-mute-support-v1-1-74d98d79e635@collabora.com/
Request URL : https://github.com/alsa-project/alsa-ucm-conf/pull/880
Patch URL : https://github.com/alsa-project/alsa-ucm-conf/pull/880.patch
Repository URL: https://github.com/alsa-project/alsa-ucm-conf
^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <alsa-project/alsa-ucm-conf/pr/880@alsa-project.org>
2026-10-14 16:30 ` ucm2: Qualcomm: Thinkpad T14s speaker mute LED support GitHub pull_request - opened
2026-10-14 17:05 ` GitHub pull_request - edited
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