linux-kernel - Re: [PATCH] arm64: dts: qcom: Add Google Herobrine WIFI SKU dts fragment

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Message-ID: <CAD=FV=XMC28U5eZhqUyr6gcNiFKmHfNLjmVAb0Asx4u0mLXZtw@mail.gmail.com>
Date:   Mon, 19 Sep 2022 16:55:15 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Sibi Sankar <quic_sibis@...cinc.com>
Cc:     Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Stephen Boyd <swboyd@...omium.org>
Subject: Re: [PATCH] arm64: dts: qcom: Add Google Herobrine WIFI SKU dts fragment

Hi,

On Fri, Sep 9, 2022 at 1:15 PM Sibi Sankar <quic_sibis@...cinc.com> wrote:
>
> The Google Herobrine WIFI SKU can save 256M by not having modem/mba/rmtfs
> memory regions defined. Add the dts fragment and mark all the board files
> appropriately.
>
> Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
> ---
>
> Depends on:
> Add LTE SKUs for Villager: https://patchwork.kernel.org/project/linux-arm-msm/cover/20220830182923.3720287-1-dianders@chromium.org/
>
> Instead of just having remoteproc_mpss node disabled, we go ahead and
> delete it on wifi only SKUs. This is done to avoid the dtbs_check
> failures that we would end of getting if we delete the memory-region
> property present in the node (since it's a required property). I'll
> send a follow up patch with IPA node enabled only on LTE SKUs as soon
> as I verify that it doesn't have any affects on suspend/resume.

s/affects/effects


> diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts b/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts
> index 344338ad8a01..480cb88f2154 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-crd-r3.dts
> @@ -9,6 +9,7 @@
>
>  #include "sc7280-idp.dtsi"
>  #include "sc7280-idp-ec-h1.dtsi"
> +#include "sc7280-herobrine-lte-sku.dtsi"

This is unrelated to the WiFi only separation, isn't it? This looks
like it's fixing a bug in commit d42fae738f3a ("arm64: dts: qcom: Add
LTE SKUs for sc7280-villager family") which removed a fragment from
"sc7280-chrome-common.dtsi" but then didn't add it back to all the
previous users. Not sure how I missed that. In any case, feels like
this should be a separate commit with a Fixes.

...also: instead of adding this include to crd-r3 and idp2, though,
why not just add it to "idp.dtsi"? Right now all things that include
"idp.dtsi" are LTE SKUs, right?


>  / {
>         model = "Qualcomm Technologies, Inc. sc7280 CRD platform (rev3 - 4)";
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine-evoker-r0.dts b/arch/arm64/boot/dts/qcom/sc7280-herobrine-evoker-r0.dts
> index ccbe50b6249a..6a2ffaac33bc 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-herobrine-evoker-r0.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine-evoker-r0.dts
> @@ -8,6 +8,7 @@
>  /dts-v1/;
>
>  #include "sc7280-herobrine.dtsi"
> +#include "sc7280-herobrine-wifi-sku.dtsi"

I think this is wrong and evoker is a LTE SKU. I'll send out a patch shortly.


> diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r1-lte.dts b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r1-lte.dts
> index f1017809e5da..ee3bca264f67 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r1-lte.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r1-lte.dts
> @@ -5,7 +5,10 @@
>   * Copyright 2022 Google LLC.
>   */
>
> -#include "sc7280-herobrine-villager-r1.dts"
> +/dts-v1/;
> +
> +#include "sc7280-herobrine-villager.dtsi"
> +#include "sc7280-herobrine-audio-wcd9385.dtsi"

I don't think this is enough. villager-r1.dts also has some other
things that you'll end up missing. I think you need to move the
existing "villager-r1.dts" to be a dtsi file and then include it from
both the new "villager-r1.dts" and "villager-r1-lte.dts"