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

[Krzysztof Kozlowski <krzk@kernel.org>]

On 25/08/2026 15:33, Karthik S wrote:
> 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 {

Don't send downstream code. There are no such patterns in upstream for
years.

Best regards,
Krzysztof