linux-kernel - Re: [PATCH v2 0/2] ASoC: qcom: q6dsp-lpass-ports: Expand sampling rate and PCM format constraints

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Message-ID: <370a9d69-1706-438a-bb36-01a22e5cf540@oss.qualcomm.com>
Date: Mon, 15 Dec 2025 12:59:19 +0530
From: Ravi Hothi <ravi.hothi@....qualcomm.com>
To: Alexey Klimov <alexey.klimov@...aro.org>,
        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>
Cc: linux-sound@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@....qualcomm.com,
        mohammad.rafi.shaik@....qualcomm.com, ajay.nandam@....qualcomm.com
Subject: Re: [PATCH v2 0/2] ASoC: qcom: q6dsp-lpass-ports: Expand sampling
 rate and PCM format constraints



On 12/10/2025 7:26 PM, Alexey Klimov wrote:
> On Wed Dec 10, 2025 at 6:51 AM GMT, Ravi Hothi wrote:
>> This patch series expands the existing constraints in
>> the q6dsp-lpass-ports driver to improve compatibility
>> and flexibility for audio stream configurations.
>>
>> The first patch extends the supported sampling rates to cover a wider
>> range, from 8000 Hz to 192000 Hz, ensuring better compatibility with
>> diverse audio hardware and allowing more flexible audio stream setups.
>>
>> The second patch adds support for the 32-bit PCM format
>> (SNDRV_PCM_FMTBIT_S32_LE) alongside the existing 16-bit
>> and 24-bit formats, enabling handling of high-resolution
>> audio streams and improving audio quality for supported hardware.
> 
> Is q6dsp-lpass-ports involved in compress offloaded playback on
> existing devices? If yes, then how is it gonna play with
> explicitly setting format/sampling rate to s16le/48k in sndcards drivers?
>


Support for s16le/48k is already available; these patch will expand the 
existing constraint so that customers can use a wider range.

Thanks
Ravi Hothi

> [..]
> 
> Best regards,
> Alexey