linux-kernel - Re: [PATCH v2 3/3] arm64: dts: qcom: sm8750: Add GPU clock & IOMMU nodes

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Message-ID: <20250724-serious-famous-python-e30a04@kuoka>
Date: Thu, 24 Jul 2025 10:21:02 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Konrad Dybcio <konradybcio@...nel.org>
Cc: Bjorn Andersson <andersson@...nel.org>, 
	Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH v2 3/3] arm64: dts: qcom: sm8750: Add GPU clock & IOMMU
 nodes

On Wed, Jul 23, 2025 at 10:38:50PM +0200, Konrad Dybcio wrote:
> From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> 
> Add the GPU_CC and GX_CC (brand new! as far as we're concerned, this
> is simply a separate block housing the GX GDSC) nodes, required to
> power up the graphics-related hardware.
> 
> Make use of it by enabling the associated IOMMU as well. The GPU itself
> needs some more work and will be enabled later.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/sm8750.dtsi | 63 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 63 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8750.dtsi b/arch/arm64/boot/dts/qcom/sm8750.dtsi
> index 4643705021c6ca095a16d8d7cc3adac920b21e82..ca0770a34bed64183185aedde04f1bb96eebfa91 100644
> --- a/arch/arm64/boot/dts/qcom/sm8750.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8750.dtsi
> @@ -5,6 +5,7 @@
>  
>  #include <dt-bindings/clock/qcom,rpmh.h>
>  #include <dt-bindings/clock/qcom,sm8750-gcc.h>
> +#include <dt-bindings/clock/qcom,sm8750-gpucc.h>
>  #include <dt-bindings/clock/qcom,sm8750-tcsr.h>
>  #include <dt-bindings/dma/qcom-gpi.h>
>  #include <dt-bindings/gpio/gpio.h>
> @@ -3154,6 +3155,68 @@ tcsrcc: clock-controller@...4008 {
>  			#reset-cells = <1>;
>  		};
>  
> +		gxcc: clock-controller@...4000 {

Not a clock controller based on properties below.

> +			compatible = "qcom,sm8750-gxcc";
> +			reg = <0x0 0x03d64000 0x0 0x6000>;
> +			power-domains = <&rpmhpd RPMHPD_GFX>,
> +					<&rpmhpd RPMHPD_MXC>,
> +					<&gpucc GPU_CC_CX_GDSC>;
> +			#power-domain-cells = <1>;
> +		};

Best regards,
Krzysztof