linux-kernel - Re: [PATCH v3 2/5] ASoC: qcom: sm8250: set card driver name from match data

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Message-ID: <91110CA9-6E83-4811-AA04-C0312B99B95E@lucaweiss.eu>
Date: Thu, 01 May 2025 16:13:40 +0200
From: Luca Weiss <luca@...aweiss.eu>
To: ~postmarketos/upstreaming@...ts.sr.ht, Srinivas Kandagatla <srini@...nel.org>,
 Luca Weiss <luca.weiss@...rphone.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>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>, phone-devel@...r.kernel.org,
 alsa-devel@...a-project.org, linux-arm-msm@...r.kernel.org,
 linux-sound@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org,
 Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
 Neil Armstrong <neil.armstrong@...aro.org>
Subject: Re: [PATCH v3 2/5] ASoC: qcom: sm8250: set card driver name from match data

Hi Srini,

Srinivas Kandagatla <srini@...nel.org> schreef op 1 mei 2025 13:37:45 CEST:
>On Fri, Apr 25, 2025 at 10:07:26AM +0200, Luca Weiss wrote:
>> Sound machine drivers for Qualcomm SoCs can be reused across multiple
>> SoCs. But user space ALSA UCM files depend on the card driver name which
>> should be set per board/SoC.
>> 
>> Allow such customization by using driver match data as sound card driver
>> name.
>> 
>> Also while we're already touching these lines, sort the compatibles
>> alphabetically.
>> 
>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
>> Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
>> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
>> ---
>>  sound/soc/qcom/sm8250.c | 9 ++++-----
>>  1 file changed, 4 insertions(+), 5 deletions(-)
>> 
>> diff --git a/sound/soc/qcom/sm8250.c b/sound/soc/qcom/sm8250.c
>> index b70b2a5031dfbf69024666f8a1049c263efcde0a..e920b413b762c803cfcc4049f35deba828275478 100644
>> --- a/sound/soc/qcom/sm8250.c
>> +++ b/sound/soc/qcom/sm8250.c
>> @@ -16,7 +16,6 @@
>>  #include "usb_offload_utils.h"
>>  #include "sdw.h"
>>  
>> -#define DRIVER_NAME		"sm8250"
>>  #define MI2S_BCLK_RATE		1536000
>>  
>>  struct sm8250_snd_data {
>> @@ -200,15 +199,15 @@ static int sm8250_platform_probe(struct platform_device *pdev)
>>  	if (ret)
>>  		return ret;
>>  
>> -	card->driver_name = DRIVER_NAME;
>> +	card->driver_name = of_device_get_match_data(dev);
>>  	sm8250_add_be_ops(card);
>>  	return devm_snd_soc_register_card(dev, card);
>>  }
>>  
>>  static const struct of_device_id snd_sm8250_dt_match[] = {
>> -	{.compatible = "qcom,sm8250-sndcard"},
>> -	{.compatible = "qcom,qrb4210-rb2-sndcard"},
>> -	{.compatible = "qcom,qrb5165-rb5-sndcard"},
>> +	{ .compatible = "qcom,qrb4210-rb2-sndcard", .data = "sm8250" },
>
>sm4250 for rb2?

Since this name is visible to user space and used for picking the UCM config, I don't think it's a good idea to change it.

Regards
Luca

>
>> +	{ .compatible = "qcom,qrb5165-rb5-sndcard", .data = "sm8250" },
>> +	{ .compatible = "qcom,sm8250-sndcard", .data = "sm8250" },
>>  	{}
>>  };
>>  
>> 
>> -- 
>> 2.49.0
>>