linux-kernel - [PATCH v4 1/2] arm64: dts: qcom: sc7280: Add memory region for audiopd

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Message-ID: <20250701084905.872519-2-quic_lxu5@quicinc.com>
Date: Tue, 1 Jul 2025 14:19:04 +0530
From: Ling Xu <quic_lxu5@...cinc.com>
To: <cros-qcom-dts-watchers@...omium.org>, <andersson@...nel.org>,
        <konradybcio@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>
CC: <quic_kuiw@...cinc.com>, <ekansh.gupta@....qualcomm.com>,
        <devicetree@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Ling Xu <quic_lxu5@...cinc.com>
Subject: [PATCH v4 1/2] arm64: dts: qcom: sc7280: Add memory region for audiopd

Add reserved memory region and VMIDs for audio PD dynamic loading and
remote heap memory requirements. This is required in use cases such as
audio compressed offload. For example, playback of compressed formats
like MP3 need audio PD support.

Co-developed-by: Ekansh Gupta <ekansh.gupta@....qualcomm.com>
Signed-off-by: Ekansh Gupta <ekansh.gupta@....qualcomm.com>
Signed-off-by: Ling Xu <quic_lxu5@...cinc.com>
---
 arch/arm64/boot/dts/qcom/sc7280.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
index 64a2abd30100..b1def5611764 100644
--- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
@@ -189,6 +189,14 @@ rmtfs_mem: rmtfs@...00000 {
 			qcom,client-id = <1>;
 			qcom,vmid = <QCOM_SCM_VMID_MSS_MSA>;
 		};
+
+		adsp_rpc_remote_heap_mem: adsp-rpc-remote-heap {
+			compatible = "shared-dma-pool";
+			size = <0x0 0x800000>;
+			alignment = <0x0 0x100000>;
+			alloc-ranges = <0x0 0x80000000 0x0 0x40000000>;
+			no-map;
+		};
 	};
 
 	cpus {
@@ -3907,6 +3915,9 @@ fastrpc {
 					qcom,glink-channels = "fastrpcglink-apps-dsp";
 					label = "adsp";
 					qcom,non-secure-domain;
+					memory-region = <&adsp_rpc_remote_heap_mem>;
+					qcom,vmids = <QCOM_SCM_VMID_LPASS>,
+						     <QCOM_SCM_VMID_ADSP_HEAP>;
 					#address-cells = <1>;
 					#size-cells = <0>;
 
-- 
2.34.1