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

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Date:	Thu, 03 Jul 2014 11:05:55 +0200
From:	Jan Kiszka <jan.kiszka@....de>
To:	Hui Wang <hui.wang@...onical.com>
CC:	Hui Wang <jason77.wang@...il.com>, tiwai@...e.de,
	alsa-devel@...a-project.org, alex.hung@...onical.com,
	yk@...onical.com, david.henningsson@...onical.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [V2 PATCH] ALSA: hda - Enable mute/mic-mute LEDs for more Thinkpads
 with Conexant codec

On 2014-07-03 10:59, Hui Wang wrote:
> On 07/03/2014 03:04 PM, Jan Kiszka wrote:
>> On 2014-07-01 11:26, Hui Wang wrote:
>>> On 07/01/2014 03:38 PM, Jan Kiszka wrote:
>>>> On 2014-07-01 04:15, Hui Wang wrote:
>>>>> On 06/30/2014 02:45 PM, Jan Kiszka wrote:
>>>>>> On 2014-06-30 04:04, Hui Wang wrote:
>>>>>>> On 06/29/2014 07:33 PM, Jan Kiszka wrote:
>>>>>>>> On 2013-11-27 07:47, Hui Wang 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.

Jan



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