linux-kernel - Re: [PATCH] ALSA: hda/realtek: Fix quirk for TongFang PHxTxX1

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Date:   Thu, 2 Dec 2021 17:02:51 +0100
From:   Werner Sembach <wse@...edocomputers.com>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ALSA: hda/realtek: Fix quirk for TongFang PHxTxX1

Am 02.12.21 um 16:35 schrieb Takashi Iwai:
> On Thu, 02 Dec 2021 16:28:43 +0100,
> Werner Sembach wrote:
>> This fixes the SND_PCI_QUIRK(...) of the TongFang PHxTxX1 barebone. This
>> fixes the issue of sound not working after s3 suspend.
>>
>> When waking up from s3 suspend the Coef 0x10 is set to 0x0220 instead of
>> 0x0020. Setting the value manually makes the sound work again. This patch
>> does this automatically.
>>
>> While being on it, I also fixed the comment formatting of the quirk.
>>
>> Signed-off-by: Werner Sembach <wse@...edocomputers.com>
>> Cc: <stable@...r.kernel.org>
> Please try to put Fixes tag as this is a fix for the existing change.
Sorry, wasn't aware of this. I guess it's [PATCH Fixes] as the beginning of the subject line?
>
> The code change looks almost good, but just minor nitpicking:
>
>> ---
>>  sound/pci/hda/patch_realtek.c | 25 ++++++++++++++-----------
>>  1 file changed, 14 insertions(+), 11 deletions(-)
>>
>> diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
>> index 9ce7457533c96..d3a16843c7afd 100644
>> --- a/sound/pci/hda/patch_realtek.c
>> +++ b/sound/pci/hda/patch_realtek.c
>> @@ -6503,22 +6503,25 @@ static void alc287_fixup_legion_15imhg05_speakers(struct hda_codec *codec,
>>  /* for alc285_fixup_ideapad_s740_coef() */
>>  #include "ideapad_s740_helper.c"
>>  
>> +static const struct coef_fw alc256_fixup_tongfang_reset_persistent_settings_coefs[] = {
> The variable name is unnecessarily too long.  Please use a shorter
> one.
Done.
>
>> +	WRITE_COEF(0x10, 0x0020), WRITE_COEF(0x24, 0x0000), WRITE_COEF(0x26, 0x0000),
>> +	WRITE_COEF(0x29, 0x3000), WRITE_COEF(0x37, 0xfe05), WRITE_COEF(0x45, 0x5089),
> Try to keep the line in 80 column.  It's OK to take a longer if it has
> to be, but in a case like this, it doesn't need to be that long.

Wrong tab width in my editor so I didn't see it, fixed in v2.

Compiling and testing now.

Kind regards,

Werner Sembach

>
>
> thanks,
>
> Takashi
>
>> +	{}
>> +};
>> +
>>  static void alc256_fixup_tongfang_reset_persistent_settings(struct hda_codec *codec,
>>  							    const struct hda_fixup *fix,
>>  							    int action)
>>  {
>>  	/*
>> -	* A certain other OS sets these coeffs to different values. On at least one TongFang
>> -	* barebone these settings might survive even a cold reboot. So to restore a clean slate the
>> -	* values are explicitly reset to default here. Without this, the external microphone is
>> -	* always in a plugged-in state, while the internal microphone is always in an unplugged
>> -	* state, breaking the ability to use the internal microphone.
>> -	*/
>> -	alc_write_coef_idx(codec, 0x24, 0x0000);
>> -	alc_write_coef_idx(codec, 0x26, 0x0000);
>> -	alc_write_coef_idx(codec, 0x29, 0x3000);
>> -	alc_write_coef_idx(codec, 0x37, 0xfe05);
>> -	alc_write_coef_idx(codec, 0x45, 0x5089);
>> +	 * A certain other OS sets these coeffs to different values. On at least
>> +	 * one TongFang barebone these settings might survive even a cold
>> +	 * reboot. So to restore a clean slate the values are explicitly reset
>> +	 * to default here. Without this, the external microphone is always in a
>> +	 * plugged-in state, while the internal microphone is always in an
>> +	 * unplugged state, breaking the ability to use the internal microphone.
>> +	 */
>> +	alc_process_coef_fw(codec, alc256_fixup_tongfang_reset_persistent_settings_coefs);
>>  }
>>  
>>  static const struct coef_fw alc233_fixup_no_audio_jack_coefs[] = {
>> -- 
>> 2.25.1
>>