linux-kernel - Re: [PATCH] arm64: dts: qcom: sm8750: Add adsp fastrpc support

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Message-Id: <D9R4NCKH46WP.14C8F7W4M58ZQ@linaro.org>
Date: Thu, 08 May 2025 23:20:08 +0100
From: "Alexey Klimov" <alexey.klimov@...aro.org>
To: "Konrad Dybcio" <konrad.dybcio@....qualcomm.com>,
 <andersson@...nel.org>, <konradybcio@...nel.org>,
 <linux-arm-msm@...r.kernel.org>
Cc: <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
 <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <srini@...nel.org>, <quic_ekangupt@...cinc.com>,
 <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH] arm64: dts: qcom: sm8750: Add adsp fastrpc support

On Fri May 2, 2025 at 10:38 AM BST, Konrad Dybcio wrote:
> On 5/2/25 3:15 AM, Alexey Klimov wrote:
>> While at this, also add required memory region for fastrpc.
>> 
>> Tested on sm8750-mtp device with adsprpdcd.
>> 
>> Cc: Ekansh Gupta <quic_ekangupt@...cinc.com>
>> Cc: Srinivas Kandagatla <srini@...nel.org>
>> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>> Signed-off-by: Alexey Klimov <alexey.klimov@...aro.org>
>> ---
>>  arch/arm64/boot/dts/qcom/sm8750.dtsi | 70 ++++++++++++++++++++++++++++
>>  1 file changed, 70 insertions(+)
>> 
>> diff --git a/arch/arm64/boot/dts/qcom/sm8750.dtsi b/arch/arm64/boot/dts/qcom/sm8750.dtsi
>> index 149d2ed17641..48ee66125a89 100644
>> --- a/arch/arm64/boot/dts/qcom/sm8750.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sm8750.dtsi
>> @@ -7,6 +7,7 @@
>>  #include <dt-bindings/clock/qcom,sm8750-gcc.h>
>>  #include <dt-bindings/clock/qcom,sm8750-tcsr.h>
>>  #include <dt-bindings/dma/qcom-gpi.h>
>> +#include <dt-bindings/firmware/qcom,scm.h>
>>  #include <dt-bindings/interconnect/qcom,icc.h>
>>  #include <dt-bindings/interconnect/qcom,sm8750-rpmh.h>
>>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>> @@ -523,6 +524,14 @@ llcc_lpi_mem: llcc-lpi@...00000 {
>>  			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>;
>> +			alignment = <0x0 0x400000>;
>> +			size = <0x0 0xc00000>;
>> +			reusable;
>> +		};
>>  	};
>>  
>>  	smp2p-adsp {
>> @@ -2237,6 +2246,67 @@ q6prmcc: clock-controller {
>>  						};
>>  					};
>>  				};
>> +
>> +				fastrpc {
>> +					compatible = "qcom,fastrpc";
>> +					qcom,glink-channels = "fastrpcglink-apps-dsp";
>> +					label = "adsp";
>> +					memory-region = <&adsp_rpc_remote_heap_mem>;
>
> IIUC the driver only considers this on the sensor DSP

Memory region is required for audio protection domain + adsprpdcd as far as I know.

Thanks,
Alexey