linux-kernel - Re: [PATCH v2] ASoC: Intel: sof_nau8825: add variant with nau8318 amplifier.

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Date:   Fri, 16 Dec 2022 11:36:56 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Ajye Huang <ajye_huang@...pal.corp-partner.google.com>
Cc:     Libin Yang <libin.yang@...el.com>,
        "balamurugan . c" <balamurugan.c@...el.com>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Takashi Iwai <tiwai@...e.com>, linux-kernel@...r.kernel.org,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Muralidhar Reddy <muralidhar.reddy@...el.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Akihiko Odaki <akihiko.odaki@...il.com>,
        ye xingchen <ye.xingchen@....com.cn>,
        David Lin <CTLIN0@...oton.com>, alsa-devel@...a-project.org,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        Brent Lu <brent.lu@...el.com>, Yong Zhi <yong.zhi@...el.com>
Subject: Re: [PATCH v2] ASoC: Intel: sof_nau8825: add variant with nau8318
 amplifier.



On 12/16/22 10:55, Ajye Huang wrote:
> Hi Pierre
> 
> On Sat, Dec 17, 2022 at 12:03 AM Pierre-Louis Bossart
> <pierre-louis.bossart@...ux.intel.com> wrote:
> 
>> On 12/16/22 09:49, Ajye Huang wrote:
>>> This patch adds the driver data for two nau8318 speaker amplifiers on
>>> SSP1 and nau8825 on SSP0 for ADL platform.
>>
>> So here you are making reference to two amplifiers...
>>
>>> +static struct snd_soc_dai_link_component nau8318_components[] = {
>>> +     {
>>> +             .name = "NVTN2012:00",
>>> +             .dai_name = "nau8315-hifi",
>>> +     }
>>> +};
>>
>> but here there's only one? I was expecting something like what we've
>> used for Maxim amplifiers with a codec configuration and dailink
>> components that list the two amplifiers.
>>
>> static struct snd_soc_codec_conf max_98373_codec_conf[] = {
>>         {
>>                 .dlc = COMP_CODEC_CONF(MAX_98373_DEV0_NAME),
>>                 .name_prefix = "Right",
>>         },
>>         {
>>                 .dlc = COMP_CODEC_CONF(MAX_98373_DEV1_NAME),
>>                 .name_prefix = "Left",
>>         },
>> };
>>
>> struct snd_soc_dai_link_component max_98373_components[] = {
>>         {  /* For Right */
>>                 .name = MAX_98373_DEV0_NAME,
>>                 .dai_name = MAX_98373_CODEC_DAI,
>>         },
>>         {  /* For Left */
>>                 .name = MAX_98373_DEV1_NAME,
>>                 .dai_name = MAX_98373_CODEC_DAI,
>>         },
>> };
>>
>> Or is this a commit message problem and there's really only one amplifier?
> 
> Really , it has two speakers.  The nau8318 is an auto mode Amplifier
> chip, similar to the max98360a amp chip.
> EX: Sof_maxim_common.c (sound\soc\intel\boards):
> static struct snd_soc_dai_link_component max_98360a_components[] = {
>     {
>         .name = MAX_98360A_DEV0_NAME,
>         .dai_name = MAX_98357A_CODEC_DAI,
>     }
> };
> It is not an i2c interface,  from the nau8318 data sheet, there are
> five pins used mainly. one for enable, others for I2S.
> EN-- enable pin
> FSR-- Frame Sync, Right
> FSL--  Frame Sync, Left
> BCLK--  bit clock
> DACIN-- Input i2s data
> 
> The FSR and FSL pins are for Left and Right channels used.
> thanks

Ok, thanks for the explanations.

Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>