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

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Message-ID: <0d094cec-0a2e-4e21-845f-977f3a77993d@oss.qualcomm.com>
Date: Fri, 2 May 2025 12:06:47 +0100
From: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
To: Luca Weiss <luca@...aweiss.eu>, ~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

On 5/1/25 15:13, Luca Weiss wrote:
> 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.
> 
It is not correct to pretend that rb2 is sm8250 for ucm cases, I agree previous code was
already doing this, Good thing is that we do not have a ucm written yet for RB2.

Lets fix this as you are already doing this for other compatibles.

--srini

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