linux-kernel - Re: [PATCH v2] ASoC: codecs: lpass-macro: Add support for channel map mixer control

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Message-ID: <ec31379a-4bc9-4cc5-b90e-ca380f5334aa@oss.qualcomm.com>
Date: Fri, 3 Oct 2025 12:30:45 +0530
From: Mohammad Rafi Shaik <mohammad.rafi.shaik@....qualcomm.com>
To: Alexey Klimov <alexey.klimov@...aro.org>
Cc: Srinivas Kandagatla <srini@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        linux-sound@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@....qualcomm.com,
        prasad.kumpatla@....qualcomm.com
Subject: Re: [PATCH v2] ASoC: codecs: lpass-macro: Add support for channel map
 mixer control



On 10/1/2025 7:36 PM, Alexey Klimov wrote:
> On Tue Sep 2, 2025 at 7:23 AM BST, Mohammad Rafi Shaik wrote:
>> Introduce the channel map mixer control support for LPASS macro
>> codec Digital Audio Interfaces (DAIs). The channel map mixer controls
>> are required by APPS to configure usecase-specific audio routing and
> 
> What is APPS here? Will be good to have this abbreviation or acronym explained.
> 

Ack,

will write proper commit description.

>> channel mapping.
>>
>> Signed-off-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@....qualcomm.com>
>> ---
>> Changes in v2:
>> - Updated patch with improved commit description..
>> - Link to v1: https://lore.kernel.org/linux-sound/20240930053111.3986838-1-quic_mohs@quicinc.com/
>> ---
>>   sound/soc/codecs/lpass-macro-common.c | 55 +++++++++++++++++++++++++++
>>   sound/soc/codecs/lpass-macro-common.h |  2 +
>>   sound/soc/codecs/lpass-rx-macro.c     | 12 ++++++
>>   sound/soc/codecs/lpass-tx-macro.c     |  9 +++++
>>   sound/soc/codecs/lpass-va-macro.c     |  9 +++++
>>   sound/soc/codecs/lpass-wsa-macro.c    | 12 ++++++
>>   6 files changed, 99 insertions(+)
>>
>> diff --git a/sound/soc/codecs/lpass-macro-common.c b/sound/soc/codecs/lpass-macro-common.c
>> index 6e3b8d0897dd..777af4885245 100644
>> --- a/sound/soc/codecs/lpass-macro-common.c
>> +++ b/sound/soc/codecs/lpass-macro-common.c
>> @@ -8,12 +8,67 @@
>>   #include <linux/platform_device.h>
>>   #include <linux/pm_domain.h>
>>   #include <linux/pm_runtime.h>
>> +#include <sound/control.h>
>> +#include <sound/pcm.h>
>> +#include <sound/soc.h>
>>   
>>   #include "lpass-macro-common.h"
>>   
>>   static DEFINE_MUTEX(lpass_codec_mutex);
>>   static enum lpass_codec_version lpass_codec_version;
>>   
>> +static int lpass_macro_chmap_ctl_get(struct snd_kcontrol *kcontrol,
>> +				     struct snd_ctl_elem_value *ucontrol)
>> +{
>> +	struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
>> +	struct snd_soc_dai *dai = info->private_data;
>> +	u32 *chmap_data = NULL;
> 
> You probably don't need to set it to NULL here, if it will be overwritten
> by kzalloc() call few lines below
>

Ack,

will fix in next version.

Thanks & Regards,
Rafi.


>> +	u32 rx_ch_cnt = 0;
>> +	u32 tx_ch_cnt = 0;
>> +	u32 rx_ch, tx_ch;
>> +
>> +	chmap_data = kzalloc(sizeof(u32) * 2, GFP_KERNEL);
> 
> here.
> 
> [..]
> 
> Thanks,
> Alexey
> 
>