Re: ThinkPad T480s & LED_MUTE, LED_MICMUTE

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On Monday 18 June 2018 12:11:44 Pali Rohár wrote:
> On Friday 15 June 2018 20:36:28 Henrique de Moraes Holschuh wrote:
> > On Fri, 15 Jun 2018, Pali Rohár wrote:
> > > means set. What is SHDA doing, I have not figured out. It does not
> > 
> > Look at the HDA mixer state, SHDA is likely to be directly messing with
> > it.
> Now I found following email thread between you and Alex with patch which
> configures HDA mixer via that SHDA method:
> But looks like that patch was never included into mainline kernel...
> Seems it would be needed in some part (to not break older Thinkpads) for
> that LED support in alsa mixer about which Takashi Iwai wrote.

Hi Alex, do you have other details or documentation for your patch
"thinkpad_acpi: added BIOS mute interfaces for volume" (linked above)
which you sent to platform-driver-x86 list 6 years ago?

It calls SHDA thinkpad ACPI function and I would like to know more what
is this function doing...

Pali Rohár

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