[PATCH v1 1/2] arm64: dts: qcom: qcs6490-rb3gen2: add audio CMA memory region for AudioReach

[Karthik S <karthik.s@oss.qualcomm.com>]

Add a dynamic CMA pool for the AudioReach audio stack on qcs6490-rb3gen2.
Use alloc-ranges to let the kernel pick a free address rather than a fixed
reg, which avoided EFI-reserved memory at 0x9cc00000. Add 4 MiB alignment
to satisfy CMA_MIN_ALIGNMENT_BYTES. Wire memory-region into q6apmdai so
the q6apm-audio-mem-cma child driver can attach the pool.

Based on the equivalent implementation for lemans (SA8295P).

Signed-off-by: Karthik S <karthik.s@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/qcs6490-audioreach.dtsi | 1 +
 arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts     | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs6490-audioreach.dtsi b/arch/arm64/boot/dts/qcom/qcs6490-audioreach.dtsi
index c1867711298b..06f65ae8afbc 100644
--- a/arch/arm64/boot/dts/qcom/qcs6490-audioreach.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs6490-audioreach.dtsi
@@ -97,6 +97,7 @@ q6apm: service@1 {
 			q6apmdai: dais {
 				compatible = "qcom,q6apm-dais";
 				iommus = <&apps_smmu 0x1801 0x0>;
+				memory-region = <&audio_cma_mem>;
 			};
 
 			q6apmbedai: bedais {
diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
index a13315bf0fb0..d39246f34172 100644
--- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
+++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
@@ -174,6 +174,14 @@ rmtfs_mem: memory@f8500000 {
 			qcom,client-id = <1>;
 			qcom,vmid = <QCOM_SCM_VMID_MSS_MSA>, <QCOM_SCM_VMID_NAV>;
 		};
+
+		audio_cma_mem: qcom,audio-ml {
+			compatible = "shared-dma-pool";
+			alloc-ranges = <0x0 0x00000000 0x0 0xffffffff>;
+			reusable;
+			alignment = <0x0 0x400000>;
+			size = <0x0 0x1000000>;
+		};
 	};
 
 	gpio-keys {
-- 
2.34.1