linux-kernel - Re: [PATCH 02/13] arm64: dts: qcom: msm8916/39: Add QDSP6

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Message-ID: <698c8d60-e284-4267-8349-b327712c94cc@linaro.org>
Date:   Tue, 26 Sep 2023 20:46:36 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Stephan Gerhold <stephan@...hold.net>,
        Bjorn Andersson <andersson@...nel.org>
Cc:     Andy Gross <agross@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: Re: [PATCH 02/13] arm64: dts: qcom: msm8916/39: Add QDSP6

On 26.09.2023 18:51, Stephan Gerhold wrote:
> MSM8916 and MSM8939 do not have a dedicated ADSP. Instead, the audio
> services via APR are also implemented by the modem DSP. Audio can be
> either routed via the modem DSP (necessary for voice call audio etc)
> or directly sent to the LPASS hardware (currently used by DB410c).
> Bypassing QDSP6 audio is only possible with special firmware
> (on DB410c) or when the modem DSP is completely disabled.
> 
> Add the typical nodes for QDSP6 audio to msm8916.dtsi and msm8939.dtsi.
> The apr node is disabled by default to avoid changing behavior for
> devices like DB410c that use the bypassed audio path.
> 
> Signed-off-by: Stephan Gerhold <stephan@...hold.net>
> ---
I'm generally grumpy with regards to multi-soc changes that
have no need to be multi-soc..

Konrad