[alsa-devel] [PATCH 1/1] ALSA: ALC283 codec - Avoid pop noise on headphones during suspend/resume

[David Henningsson]

On 2014-10-09 20:41, Takashi Iwai wrote:
> At Thu,  9 Oct 2014 11:04:56 +0000,
> Harsha Priya wrote:
>> This patch sets the headphones mode to default before suspending
>> which helps avoid the pop noise on headphones
> The change looks simple, but since it's a mysterious COEF, I'd like to
> hear from people testing with other machines with this codec before
> applying the patch.
>
> David, do you know anyone in your team have such a machine to test?

Looping Hui here, do you have a machine with ALC283 to test with or 
knows who has one?

>
>
> thanks,
>
> Takashi
>
>> Signed-off-by: Harsha Priya <harshapriya.n at intel.com>
>>
>> diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
>> index 69d1236..e839e7a 100644
>> --- a/sound/pci/hda/patch_realtek.c
>> +++ b/sound/pci/hda/patch_realtek.c
>> @@ -2884,6 +2884,9 @@ static void alc283_shutup(struct hda_codec *codec)
>>   
>>   	alc_write_coef_idx(codec, 0x43, 0x9004);
>>   
>> +	/*depop hp during suspend*/
>> +	alc_write_coef_idx(codec, 0x06, 0x2100);
>> +
>>   	snd_hda_codec_write(codec, hp_pin, 0,
>>   			    AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE);
>>   
>> -- 
>> 1.9.1
>>