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

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Message-ID: <3c0fea8d-0715-40e6-bed9-e0961bf034e0@oss.qualcomm.com>
Date: Fri, 9 May 2025 00:57:44 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Alexey Klimov <alexey.klimov@...aro.org>, 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 5/9/25 12:20 AM, Alexey Klimov wrote:
> 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.

next-20250508

rmem_node = of_parse_phandle(rdev->of_node, "memory-region", 0);
if (domain_id == SDSP_DOMAIN_ID && rmem_node) {
	// ...
}

maybe some driver changes are still pending?

Konrad