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

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Message-ID: <53B52146.9050300@canonical.com>
Date:	Thu, 03 Jul 2014 17:24:22 +0800
From:	Hui Wang <hui.wang@...onical.com>
To:	Jan Kiszka <jan.kiszka@....de>
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 07/03/2014 05:05 PM, Jan Kiszka wrote:
> 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.

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);


@alexhung,
Do you have any idea why this can affect the power button behavior?

>
> Jan
>
>

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