linux-kernel - Re: [PATCH v5 2/4] ARM: tegra114: add missing HOST1X device nodes

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Message-ID: <FF69608E-EE3A-40E3-A02B-A6BF8FDE4800@gmail.com>
Date: Wed, 17 Sep 2025 07:09:13 +0300
From: Svyatoslav <clamor95@...il.com>
To: Mikko Perttunen <mperttunen@...dia.com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
 Thierry Reding <treding@...dia.com>,
 Thierry Reding <thierry.reding@...il.com>,
 Jonathan Hunter <jonathanh@...dia.com>
CC: devicetree@...r.kernel.org, linux-tegra@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/4] ARM: tegra114: add missing HOST1X device nodes



17 вересня 2025 р. 05:44:42 GMT+03:00, Mikko Perttunen <mperttunen@...dia.com> пише:
>On Wednesday, August 27, 2025 8:37 PM Svyatoslav Ryhel wrote:
>> Add nodes for devices on the HOST1X bus: VI, EPP, ISP, MSENC and TSEC.
>> 
>> Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
>> ---
>>  arch/arm/boot/dts/nvidia/tegra114.dtsi | 64 ++++++++++++++++++++++++++
>>  1 file changed, 64 insertions(+)
>> 
>> diff --git a/arch/arm/boot/dts/nvidia/tegra114.dtsi b/arch/arm/boot/dts/nvidia/tegra114.dtsi
>> index 4caf2073c556..8600a5c52be9 100644
>> --- a/arch/arm/boot/dts/nvidia/tegra114.dtsi
>> +++ b/arch/arm/boot/dts/nvidia/tegra114.dtsi
>> @@ -47,6 +47,45 @@ host1x@...00000 {
>>  
>>  		ranges = <0x54000000 0x54000000 0x01000000>;
>>  
>> +		vi@...80000 {
>> +			compatible = "nvidia,tegra114-vi";
>> +			reg = <0x54080000 0x00040000>;
>> +			interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&tegra_car TEGRA114_CLK_VI>;
>> +			resets = <&tegra_car 20>;
>> +			reset-names = "vi";
>
>You are adding reset-names here, but in the last patch you're removing it where there's only one reset?

I am not "adding" it, it is present in the existing schema and I am making node accordingly. I have no intention to touch schema unless it is absolutely necessary.

>> +
>> +			iommus = <&mc TEGRA_SWGROUP_VI>;
>> +
>> +			status = "disabled";
>> +		};
>> +
>> +		epp@...c0000 {
>> +			compatible = "nvidia,tegra114-epp";
>> +			reg = <0x540c0000 0x00040000>;
>> +			interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&tegra_car TEGRA114_CLK_EPP>;
>> +			resets = <&tegra_car TEGRA114_CLK_EPP>;
>> +			reset-names = "epp";
>> +
>> +			iommus = <&mc TEGRA_SWGROUP_EPP>;
>> +
>> +			status = "disabled";
>> +		};
>> +
>> +		isp@...00000 {
>> +			compatible = "nvidia,tegra114-isp";
>> +			reg = <0x54100000 0x00040000>;
>> +			interrupts = <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&tegra_car TEGRA114_CLK_ISP>;
>> +			resets = <&tegra_car TEGRA114_CLK_ISP>;
>> +			reset-names = "isp";
>> +
>> +			iommus = <&mc TEGRA_SWGROUP_ISP>;
>> +
>> +			status = "disabled";
>> +		};
>> +
>>  		gr2d@...40000 {
>>  			compatible = "nvidia,tegra114-gr2d";
>>  			reg = <0x54140000 0x00040000>;
>> @@ -149,6 +188,31 @@ dsib: dsi@...00000 {
>>  			#address-cells = <1>;
>>  			#size-cells = <0>;
>>  		};
>> +
>> +		msenc@...c0000 {
>> +			compatible = "nvidia,tegra114-msenc";
>> +			reg = <0x544c0000 0x00040000>;
>> +			interrupts = <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&tegra_car TEGRA114_CLK_MSENC>;
>> +			resets = <&tegra_car TEGRA114_CLK_MSENC>;
>> +			reset-names = "mpe";
>
>FWIW, I think 'msenc' is the appropriate name to use on Tegra114/Tegra124. I believe MPE is a remnant from older chips, even if some downstream (and I guess upstreaming) naming still uses it.
>

Same here, I am making those according to schema and I will not touch it if not neceserry.

>> +
>> +			iommus = <&mc TEGRA_SWGROUP_MSENC>;
>> +
>> +			status = "disabled";
>> +		};
>> +
>> +		tsec@...00000 {
>> +			compatible = "nvidia,tegra114-tsec";
>> +			reg = <0x54500000 0x00040000>;
>> +			interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
>> +			clocks = <&tegra_car TEGRA114_CLK_TSEC>;
>> +			resets = <&tegra_car TEGRA114_CLK_TSEC>;
>> +
>> +			iommus = <&mc TEGRA_SWGROUP_TSEC>;
>> +
>> +			status = "disabled";
>> +		};
>>  	};
>>  
>>  	gic: interrupt-controller@...41000 {
>> 
>
>
>