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

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Date:	Mon, 30 Jun 2014 10:04:06 +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 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
>> the codecs have different minor Vendor Id and minor Subsystem Id,
>> they all belong to the cxt5066 family, this change can make the
>> mute/mic-mute LEDs support more generic among cxt_5066 family.
>>
>> This design refers to the similar solution for the realtek codec
>> ALC269 family in the patch_realtek.c.
>>
>> Cc: Alex Hung <alex.hung@...onical.com>
>> Cc: David Henningsson <david.henningsson@...onical.com>
>> Signed-off-by: Hui Wang <hui.wang@...onical.com>
>> ---
>>   sound/pci/hda/patch_conexant.c | 23 +++++++++++++++++++++++
>>   1 file changed, 23 insertions(+)
>>
>> diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
>> index c205bb1..1f2717f 100644
>> --- a/sound/pci/hda/patch_conexant.c
>> +++ b/sound/pci/hda/patch_conexant.c
>> @@ -3244,9 +3244,29 @@ enum {
>>   #if IS_ENABLED(CONFIG_THINKPAD_ACPI)
>>   
>>   #include <linux/thinkpad_acpi.h>
>> +#include <acpi/acpi.h>
>>   
>>   static int (*led_set_func)(int, bool);
>>   
>> +static acpi_status acpi_check_cb(acpi_handle handle, u32 lvl, void *context,
>> +				 void **rv)
>> +{
>> +	bool *found = context;
>> +	*found = true;
>> +	return AE_OK;
>> +}
>> +
>> +static bool is_thinkpad(struct hda_codec *codec)
>> +{
>> +	bool found = false;
>> +	if (codec->subsystem_id >> 16 != 0x17aa)
>> +		return false;
>> +	if (ACPI_SUCCESS(acpi_get_devices("LEN0068", acpi_check_cb, &found, NULL)) && found)
>> +		return true;
>> +	found = false;
>> +	return ACPI_SUCCESS(acpi_get_devices("IBM0068", acpi_check_cb, &found, NULL)) && found;
>> +}
>> +
>>   static void update_tpacpi_mute_led(void *private_data, int enabled)
>>   {
>>   	struct hda_codec *codec = private_data;
>> @@ -3279,6 +3299,8 @@ static void cxt_fixup_thinkpad_acpi(struct hda_codec *codec,
>>   	bool removefunc = false;
>>   
>>   	if (action == HDA_FIXUP_ACT_PROBE) {
>> +		if (!is_thinkpad(codec))
>> +			return;
>>   		if (!led_set_func)
>>   			led_set_func = symbol_request(tpacpi_led_set);
>>   		if (!led_set_func) {
>> @@ -3494,6 +3516,7 @@ static const struct snd_pci_quirk cxt5066_fixups[] = {
>>   	SND_PCI_QUIRK(0x17aa, 0x3975, "Lenovo U300s", CXT_FIXUP_STEREO_DMIC),
>>   	SND_PCI_QUIRK(0x17aa, 0x3977, "Lenovo IdeaPad U310", CXT_FIXUP_STEREO_DMIC),
>>   	SND_PCI_QUIRK(0x17aa, 0x397b, "Lenovo S205", CXT_FIXUP_STEREO_DMIC),
>> +	SND_PCI_QUIRK_VENDOR(0x17aa, "Thinkpad", CXT_FIXUP_THINKPAD_ACPI),
>>   	SND_PCI_QUIRK(0x1c06, 0x2011, "Lemote A1004", CXT_PINCFG_LEMOTE_A1004),
>>   	SND_PCI_QUIRK(0x1c06, 0x2012, "Lemote A1205", CXT_PINCFG_LEMOTE_A1205),
>>   	{}
>>
> Starting with this patch, my Lenovo Thinkpad X121e netbook (it's without
> any mute LEDs, BTW, there is only a power LED) considers the power
> button as hard reset. I have to exclude my machine from that ACPI fixup
> (this is on top of current Linus master):
It seems more like a firmware issue, in the acpi code, the "SSMS" is for 
mute led, and the "MMTS" is for micmute led, I don't know why your 
machine can pass "SSMS" or "MMTS" scanning even without mute LEDs.



> diff --git a/sound/pci/hda/thinkpad_helper.c b/sound/pci/hda/thinkpad_helper.c
> index 6ba0b55..7e1a179 100644
> --- a/sound/pci/hda/thinkpad_helper.c
> +++ b/sound/pci/hda/thinkpad_helper.c
> @@ -21,7 +21,8 @@ static acpi_status acpi_check_cb(acpi_handle handle, u32 lvl, void *context,
>   static bool is_thinkpad(struct hda_codec *codec)
>   {
>   	bool found = false;
> -	if (codec->subsystem_id >> 16 != 0x17aa)
> +	if (codec->subsystem_id >> 16 != 0x17aa ||
> +	    codec->subsystem_id == 0x17aa21ec)
>   		return false;
>   	if (ACPI_SUCCESS(acpi_get_devices("LEN0068", acpi_check_cb, &found, NULL)) && found)
>   		return true;
>
>
> Is that the way to address it? Then I can send a proper patch. Any hints
> regarding the "why" will be incorporated into its description.
>
> Thanks,
> Jan
>

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