linux-kernel - Re: [PATCH] arm64: dts: qcom: msm8992-lg-bullhead: Correct memory overlap with SMEM region

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Date:   Mon, 30 Jan 2023 15:19:03 +0100
From:   Petr Vorel <petr.vorel@...il.com>
To:     Jamie Douglass <jamiemdouglass@...il.com>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Dominik Kobinski <dominikkobinski314@...il.com>,
        Konrad Dybico <konrad.dybico@...aro.org>
Subject: Re: [PATCH] arm64: dts: qcom: msm8992-lg-bullhead: Correct memory
 overlap with SMEM region

Hi Jamie,

On Sat, 28 Jan 2023 at 06:53, Jamie Douglass <jamiemdouglass@...il.com> wrote:
>
> A previously committed reserved memory region was overlapping with the

IMHO there should be marked commit which you're fixing:
Fixes: 22c7e1a0fa45 ("arm64: dts: msm8992-bullhead: add memory hole region")

> SMEM memory region, causing an error message in dmesg:
>         OF: reserved mem: OVERLAP DETECTED!
>         reserved@...0000 (0x0000000005000000--0x0000000007200000)
>         overlaps with smem_region@...0000
>         (0x0000000006a00000--0x0000000006c00000)
> This patch splits the previous reserved memory region into two
> reserved sections either side of the SMEM memory region.

Reviewed-by: Petr Vorel <pvorel@...e.cz>
Tested-by: Petr Vorel <pvorel@...e.cz>
...
> +++ b/arch/arm64/boot/dts/qcom/msm8992-lg-bullhead.dtsi
> @@ -53,8 +53,13 @@ cont_splash_mem: memory@...0000 {
>                         no-map;
>                 };
>
> -               removed_region: reserved@...0000 {
> -                       reg = <0 0x05000000 0 0x2200000>;
> +               reserved@...0000 {
Can we keep "removed_region:" ?
removed_region: reserved@...0000 {

> +                       reg = <0x0 0x05000000 0x0 0x1a00000>;
> +                       no-map;
> +               };
> +
> +               reserved@...0000 {
Not sure which label to add, maybe append 2?
removed_region2: reserved@...0000 {
@Konrad @Krzysztof WDYT?

Kind regards,
Petr

> +                       reg = <0x0 0x06c00000 0x0 0x400000>;
>                         no-map;
>                 };
>         };