Re: [PATCH 1/3] arm64: dts: qcom: milos: Reduce rmtfs_mem size to 2.5MiB

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 3/21/26 6:00 PM, Alexander Koskovich wrote:
> The rmtfs_mem region is currently sized at 6MiB but the default for
> milos downstream is 2.5MiB. This causes remoteproc crashes on devices
> that expect the smaller size:
> 
> modem_ac.c:281:Access Control Error: Could not protect the region specified:Start:e1f00000 End:e2180000, PID:1
> 
> Reduce the default to 2.5MiB to match the QCOM downstream config, and
> override the size for FP6.
> 
> Signed-off-by: Alexander Koskovich <akoskovich@pm.me>
> ---
>  arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts | 4 ++++
>  arch/arm64/boot/dts/qcom/milos.dtsi              | 2 +-
>  2 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts b/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts
> index 52895dd9e4fa..c0981ab731c4 100644
> --- a/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts
> +++ b/arch/arm64/boot/dts/qcom/milos-fairphone-fp6.dts
> @@ -724,6 +724,10 @@ &remoteproc_wpss {
>  	status = "okay";
>  };
>  
> +&rmtfs_mem {
> +	reg = <0x0 0xe1f00000 0x0 0x600000>;

+Luca

Could you please confirm that this was intentional in the first place?

FWIW I see that volcano.dtsi indeed only requests 0x280_000 on a "clean"
Qualcomm tree

Konrad