Re: [PATCH RFT v3 1/2] arm64: dts: qcom: sm8750: add memory node for adsp fastrpc

[Konrad Dybcio]

On 12/9/25 8:37 AM, Alexey Klimov wrote:
> Add optional memory heap node that can be used for ADSP fastrpc.
> 
> Cc: Ekansh Gupta <quic_ekangupt@xxxxxxxxxxx>
> Cc: Srinivas Kandagatla <srini@xxxxxxxxxx>
> Signed-off-by: Alexey Klimov <alexey.klimov@xxxxxxxxxx>
> ---
>  arch/arm64/boot/dts/qcom/sm8750.dtsi | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8750.dtsi b/arch/arm64/boot/dts/qcom/sm8750.dtsi
> index 3f0b57f428bbb388521c27d9ae96bbef3d62b2e2..be89c65163bf0480100c09c883b68d03455c1870 100644
> --- a/arch/arm64/boot/dts/qcom/sm8750.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8750.dtsi
> @@ -524,6 +524,14 @@ llcc_lpi_mem: llcc-lpi@ff800000 {
>  			reg = <0x0 0xff800000 0x0 0x800000>;
>  			no-map;
>  		};
> +
> +		adsp_rpc_remote_heap_mem: adsp-rpc-remote-heap {
> +			compatible = "shared-dma-pool";
> +			alloc-ranges = <0x0 0x00000000 0x0 0xffffffff>;

Ekansh, perhaps you'd know.. is there any reason for this to only be
allocated in the lowest 4G?

Konrad

> +			alignment = <0x0 0x400000>;
> +			size = <0x0 0xc00000>;
> +			reusable;
> +		};
>  	};
>  
>  	smp2p-adsp {
>