linux-kernel - Re: [PATCH 8/9] arm64: dts: qcom: msm8916/39: Move mpss

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Message-ID: <b66a72ef-653b-47cb-8c0a-df8418c3619c@linaro.org>
Date:   Fri, 15 Sep 2023 15:51:52 +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,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: Re: [PATCH 8/9] arm64: dts: qcom: msm8916/39: Move mpss_mem size to
 boards

On 11.09.2023 19:41, Stephan Gerhold wrote:
> The modem firmware size is typically highly device-specific.
> The current size of the mpss_mem region in msm8916.dtsi (0x2b00000)
> only works for some APQ8016 devices without full-featured modem,
> such as the DragonBoard 410c.
> 
> The full modem firmware is typically about twice as large (~45 MiB
> -> ~90 MiB) but also varies by a few MiB from device to device. Since
> these devices are quite memory-constrained nowadays it's important to
> minimize the unnecessary memory reservations.
> 
> Make it clear that each board needs to specify the necessary mpss_mem
> size by replacing the DB410c-specific size in msm8916.dtsi with a
> simple comment. &mpss_mem is disabled by default so it's fine to leave
> some properties up to the boards if they want to enable it.
> 
> Signed-off-by: Stephan Gerhold <stephan@...hold.net>
> ---
Any reason not to squash it with one of the earlier patches then?

Konrad