Re: [alsa-devel] [V2 PATCH] ALSA: hda - Enable mute/mic-mute LEDs for more Thinkpads with Conexant codec

[Hui Wang]

On 06/27/2015 11:03 AM, Raymond Yau wrote:
> > > > > > > > > > > > > Most Thinkpad Edge series laptops use conexant codec, so far
> > > > > > > > > > > > > although
> > > > > > > <snip>
> > > > > > > > > > Is there anything I can debug or any information I can collect
> > > > > > > > > > from my
> > > > > > > > > > box to examine this?
> > > > > > > > > What is the linux distribution on your machine? And use showkey to
> > > > > > > > > catch
> > > > > > > > > the keycode of that button.
> > > > > > > > I'm running OpenSUSE 13.1. The reported keycode of the power
> > > > > > > > button is
> > > > > > > > 116.
> > > > > > > It seems the keycode is correct, it is power keycode rather the mute
> > > > > > > keycode.
> > > > > > >
> > > > > > > Could you please do some debug, let us find which line of code is
> the
> > > > > > > root cause for this problem. for example:
> > > > > > >
> > > > > > > after running the line, the problem shows up:
> > > > > > >
> > > > > > > 1.     if (ACPI_SUCCESS(acpi_get_devices("LEN0068", acpi_check_cb,
> > > > > > > &found, NULL)) && found) // in the sound/pci/hda/thinkpad_helper.c,
> > > > > > > is_thinkpad()
> > > > > > This evaluates to true
> > > > > >
> > > > > > > 2.     return ACPI_SUCCESS(acpi_get_devices("IBM0068",
> acpi_check_cb,
> > > > > > > &found, NULL)) && found; // same as above
> > > > > > >
> > > > > > > 3.         if (led_set_func(TPACPI_LED_MUTE, false) >= 0) { //in the
> > > > > > > sound/pci/hda/thinkpad_helper.c, hda_fixup_thinkpad_acpi()
> > > > > > ...and this
> > > > > >
> > > > > > > 4. if (led_set_func(TPACPI_LED_MICMUTE, false) >= 0) { // same as
> > > > > > > above
> > > > > > ...and this as well. spec->num_adc_nids is 1.
> > > > > If we change the code like below, does the power button can work well?
> > > > >
> > > > > in the thinkpad_helper.c, hda_fixup_thinkpad_acpi()
> > > > >
> > > > >
> > > > >           if (led_set_func(TPACPI_LED_MUTE, false) >= 0) {
> > > > >               /*
> > > > >               old_vmaster_hook = spec->vmaster_mute.hook;
> > > > >               spec->vmaster_mute.hook = update_tpacpi_mute_led;
> > > > >               removefunc = false;
> > > > >              */
> > > > Disabling only this block resolves the issue.
> > > So Below two lines make the power button change to the reset button.
> > >
> > > drivers/platform/x86/thinkpad_acpi.c  mute_led_on_off():
> > >
> > > acpi_get_handle(hkey_handle, "SSMS", &temp);
> > > acpi_evalf(hkey_handle, &output, "SSMS", "dd", 1);
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/platform/x86/thinkpad_acpi.c?id=9a417ec0c9d1f7af5394333411fc4d98adb8761b
>
> It seem that software mute also depend on HAUM and SAUM ACPI interface
>
> Seem regression of the above patch is SSMS is not supported
>
> https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1450947
>
> Which models of thinkpad are tested by the author ?
A lot, we tested this patch on all Lenovo machines with mute led we 
have. I need to check the models name and provide them at a later time.

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