linux-kernel - Re: [PATCH 5/6] arm64: dts: qcom: qcs615: Add gpu and rgmu nodes

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Message-ID: <25ad160b-b618-4ade-a978-e4ae56c79e32@oss.qualcomm.com>
Date: Fri, 24 Oct 2025 03:47:29 +0530
From: Akhil P Oommen <akhilpo@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Rob Clark <robin.clark@....qualcomm.com>, Sean Paul <sean@...rly.run>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Jie Zhang <quic_jiezh@...cinc.com>
Subject: Re: [PATCH 5/6] arm64: dts: qcom: qcs615: Add gpu and rgmu nodes

On 10/22/2025 8:57 PM, Konrad Dybcio wrote:
> On 10/17/25 7:08 PM, Akhil P Oommen wrote:
>> From: Jie Zhang <quic_jiezh@...cinc.com>
>>
>> Add gpu and rgmu nodes for qcs615 chipset.
>>
>> Signed-off-by: Jie Zhang <quic_jiezh@...cinc.com>
>> Signed-off-by: Akhil P Oommen <akhilpo@....qualcomm.com>
>> ---
> 
> [...]
> 
>> +			gpu_zap_shader: zap-shader {
>> +				memory-region = <&pil_gpu_mem>;
>> +			};
>> +
>> +			gpu_opp_table: opp-table {
>> +				compatible = "operating-points-v2";
>> +
>> +				opp-845000000 {
>> +					opp-hz = /bits/ 64 <845000000>;
>> +					required-opps = <&rpmhpd_opp_turbo>;
>> +					opp-peak-kBps = <7050000>;
> 
> Are there speed bins?

None I am aware of as of now.

> 
> [...]
> 
>> +		rgmu: rgmu@...a000 {
>> +			compatible = "qcom,adreno-rgmu-612.0", "qcom,adreno-rgmu";
>> +			reg = <0x0 0x0506a000 0x0 0x34000>;
>> +			reg-names = "gmu";
>> +
>> +			clocks = <&gpucc GPU_CC_CX_GMU_CLK>,
>> +				 <&gpucc GPU_CC_CXO_CLK>,
>> +				 <&gcc GCC_DDRSS_GPU_AXI_CLK>,
>> +				 <&gcc GCC_GPU_MEMNOC_GFX_CLK>,
>> +				 <&gpucc GPU_CC_HLOS1_VOTE_GPU_SMMU_CLK>;
>> +			clock-names = "gmu",
>> +				      "cxo",
>> +				      "axi",
>> +				      "memnoc",
>> +				      "smmu_vote";
>> +
>> +			power-domains = <&gpucc CX_GDSC>,
>> +					<&gpucc GX_GDSC>,
>> +					<&rpmhpd RPMHPD_CX>;
>> +			power-domain-names = "cx", "gx", "vdd_cx";
> 
> I think the gpucc node should reference _CX directly instead,
> then genpd/opp should trickle the requirements up the chain

Do you mean the CX rail scaling here should be handled by gpucc clk driver?


> 
>> +
>> +			interrupts = <GIC_SPI 304 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 305 IRQ_TYPE_LEVEL_HIGH>;
>> +			interrupt-names = "oob", "gmu";
> 
> 1 a line, please

Ack. Thanks

-Akhil

> 
> lgtm otherwise
> 
> Konrad