[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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