linux-kernel - Re: [PATCH v2 5/6] arm64: dts: qcom: qcs8300: Add gpu and gmu nodes

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Message-ID: <aa8ebd50-683b-4043-9494-5675a2d9a01e@quicinc.com>
Date: Mon, 28 Apr 2025 16:14:33 +0530
From: Akhil P Oommen <quic_akhilpo@...cinc.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Rob Clark
	<robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Konrad Dybcio
	<konradybcio@...nel.org>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        "Dmitry
 Baryshkov" <dmitry.baryshkov@...aro.org>,
        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 v2 5/6] arm64: dts: qcom: qcs8300: Add gpu and gmu nodes

On 4/14/2025 4:31 PM, Konrad Dybcio wrote:
> On 2/27/25 9:07 PM, Akhil P Oommen wrote:
>> From: Jie Zhang <quic_jiezh@...cinc.com>
>>
>> Add gpu and gmu nodes for qcs8300 chipset.
>>
>> Signed-off-by: Jie Zhang <quic_jiezh@...cinc.com>
>> Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
>> ---
> 
> [...]
> 
>> +		gmu: gmu@...a000 {
>> +			compatible = "qcom,adreno-gmu-623.0", "qcom,adreno-gmu";
>> +			reg = <0x0 0x03d6a000 0x0 0x34000>,
> 
> size = 0x26000 so that it doesn't leak into GPU_CC

We dump GPUCC regs into snapshot!

> 
>> +			      <0x0 0x03de0000 0x0 0x10000>,
>> +			      <0x0 0x0b290000 0x0 0x10000>;
>> +			reg-names = "gmu", "rscc", "gmu_pdc";
>> +			interrupts = <GIC_SPI 304 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 305 IRQ_TYPE_LEVEL_HIGH>;
>> +			interrupt-names = "hfi", "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_AHB_CLK>,
>> +				 <&gpucc GPU_CC_HUB_CX_INT_CLK>,
>> +				 <&gpucc GPU_CC_HLOS1_VOTE_GPU_SMMU_CLK>;
> 
> This should only be bound to the SMMU

Not sure how this sneaked in. Will remove this.

> 
>> +			clock-names = "gmu",
>> +				      "cxo",
>> +				      "axi",
>> +				      "memnoc",
>> +				      "ahb",
>> +				      "hub",
>> +				      "smmu_vote";
>> +			power-domains = <&gpucc GPU_CC_CX_GDSC>,
>> +					<&gpucc GPU_CC_GX_GDSC>;
>> +			power-domain-names = "cx",
>> +					     "gx";
>> +			iommus = <&adreno_smmu 5 0xc00>;
>> +			operating-points-v2 = <&gmu_opp_table>;
>> +
>> +			gmu_opp_table: opp-table {
>> +				compatible = "operating-points-v2";
>> +
>> +				opp-200000000 {
>> +					opp-hz = /bits/ 64 <200000000>;
> 
> It looks like this clock only has a 500 Mhz rate 

Ack.

-Akhil.
> 
> Konrad