linux-kernel - Re: [RESEND v3 2/2] ASoC: qcom: sc8280xp: Add support for QCM6490 and QCS6490

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Date: Mon, 8 Apr 2024 13:53:51 +0100
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>,
 Mohammad Rafi Shaik <quic_mohs@...cinc.com>
Cc: Banajit Goswami <bgoswami@...cinc.com>,
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
 Takashi Iwai <tiwai@...e.com>, linux-arm-msm@...r.kernel.org,
 alsa-devel@...a-project.org, linux-sound@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 quic_rohkumar@...cinc.com
Subject: Re: [RESEND v3 2/2] ASoC: qcom: sc8280xp: Add support for QCM6490 and
 QCS6490



On 08/04/2024 13:45, Bjorn Andersson wrote:
> On Mon, Apr 08, 2024 at 09:53:31AM +0530, Mohammad Rafi Shaik wrote:
>> Add compatibles for sound card on Qualcomm QCM6490 IDP and
>> QCS6490 RB3Gen2 boards.
>>
>> Signed-off-by: Mohammad Rafi Shaik <quic_mohs@...cinc.com>
>> ---
>>   sound/soc/qcom/sc8280xp.c | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/sound/soc/qcom/sc8280xp.c b/sound/soc/qcom/sc8280xp.c
>> index b7fd503a1666..878bd50ad4a7 100644
>> --- a/sound/soc/qcom/sc8280xp.c
>> +++ b/sound/soc/qcom/sc8280xp.c
>> @@ -169,6 +169,8 @@ static int sc8280xp_platform_probe(struct platform_device *pdev)
>>   }
>>   
>>   static const struct of_device_id snd_sc8280xp_dt_match[] = {
>> +	{.compatible = "qcom,qcm6490-idp-sndcard", "qcm6490"},
>> +	{.compatible = "qcom,qcs6490-rb3gen2-sndcard", "qcs6490"},
> 
> We now have 4 <platform>-sndcard and two <board>-sndcard compatibles
> here.
> 
> Not saying that your patch is wrong, but is this driver board-specific
> or soc-specific? Srinivas, Krzysztof?

Normally this should be board specific.

In the past we made them SoC specific and provided a way to do board 
specific changes based on compatible. Recently we stopped adding new 
drivers as most of these drivers turned out to be identical and lots of 
code duplication.

Having these compatibles will help both the userspace UCM and provide 
hooks to do any board/soc specific configurations.

thanks,
Srini

> 
> Regards,
> Bjorn
> 
>>   	{.compatible = "qcom,sc8280xp-sndcard", "sc8280xp"},
>>   	{.compatible = "qcom,sm8450-sndcard", "sm8450"},
>>   	{.compatible = "qcom,sm8550-sndcard", "sm8550"},
>> -- 
>> 2.25.1
>>
>>