linux-kernel - Re: [PATCH v4 2/2] ASoC: qcom: audioreach: Add support for VI Sense module

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Message-ID: <b7ae5cac-5eef-4a3c-a1a8-01b1d1b796cb@oss.qualcomm.com>
Date: Wed, 17 Dec 2025 11:19:32 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@....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>,
        linux-sound@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
Subject: Re: [PATCH v4 2/2] ASoC: qcom: audioreach: Add support for VI Sense
 module

On 12/17/25 10:46 AM, Krzysztof Kozlowski wrote:
> VI Sense module in ADSP is responsible for feedback loop for measuring
> current and voltage of amplifiers, necessary for proper calibration of
> Speaker Protection algorightms.  Implement parsing
> MODULE_ID_SPEAKER_PROTECTION_VI from Audioreach topology and sending it
> as command to the ADSP.
> 
> Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@....qualcomm.com>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
> 
> ---

[...]

> +	cm_cfg->cfg.num_channels = num_channels * 2;
> +	for (i = 0; i < num_channels; i++) {
> +		/*
> +		 * Map speakers into Vsense and then Isense of each channel.
> +		 * E.g. for PCM_CHANNEL_FL and PCM_CHANNEL_FR to:
> +		 * [1, 2, 3, 4]
> +		 */
> +		cm_cfg->cfg.channel_mapping[2 * i] = (mcfg->channel_map[i] - 1) * 2 + 1;
> +		cm_cfg->cfg.channel_mapping[2 * i + 1] = (mcfg->channel_map[i] - 1) * 2 + 2;

Fly-by review, I don't really know - can't (channel_map[i] - 1) underflow?

Konrad