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: <DEUL786WEYBY.3502XZKMTYTN3@linaro.org>
Date: Wed, 10 Dec 2025 13:56:16 +0000
From: "Alexey Klimov" <alexey.klimov@...aro.org>
To: "Ravi Hothi" <ravi.hothi@....qualcomm.com>, "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 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?

[..]

Best regards,
Alexey