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Message-ID: <20250924223551.2957340-1-robh@kernel.org>
Date: Wed, 24 Sep 2025 17:35:49 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: 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>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Alexandre Courbot <acourbot@...dia.com>,
Jon Hunter <jonathanh@...dia.com>,
Thierry Reding <treding@...dia.com>
Cc: dri-devel@...ts.freedesktop.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: gpu: Convert nvidia,gk20a to DT schema
Convert the NVIDIA GPU binding to DT schema format.
Add undocumented "interconnects" and "interconnect-names" properties for
gp10b and gv11b. Drop all but one example.
Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
.../devicetree/bindings/gpu/nvidia,gk20a.txt | 115 ------------
.../devicetree/bindings/gpu/nvidia,gk20a.yaml | 171 ++++++++++++++++++
2 files changed, 171 insertions(+), 115 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt
create mode 100644 Documentation/devicetree/bindings/gpu/nvidia,gk20a.yaml
diff --git a/Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt b/Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt
deleted file mode 100644
index cc6ce5221a38..000000000000
--- a/Documentation/devicetree/bindings/gpu/nvidia,gk20a.txt
+++ /dev/null
@@ -1,115 +0,0 @@
-NVIDIA Tegra Graphics Processing Units
-
-Required properties:
-- compatible: "nvidia,<gpu>"
- Currently recognized values:
- - nvidia,gk20a
- - nvidia,gm20b
- - nvidia,gp10b
- - nvidia,gv11b
-- reg: Physical base address and length of the controller's registers.
- Must contain two entries:
- - first entry for bar0
- - second entry for bar1
-- interrupts: Must contain an entry for each entry in interrupt-names.
- See ../interrupt-controller/interrupts.txt for details.
-- interrupt-names: Must include the following entries:
- - stall
- - nonstall
-- vdd-supply: regulator for supply voltage. Only required for GPUs not using
- power domains.
-- clocks: Must contain an entry for each entry in clock-names.
- See ../clocks/clock-bindings.txt for details.
-- clock-names: Must include the following entries:
- - gpu
- - pwr
-If the compatible string is "nvidia,gm20b", then the following clock
-is also required:
- - ref
-If the compatible string is "nvidia,gv11b", then the following clock is also
-required:
- - fuse
-- resets: Must contain an entry for each entry in reset-names.
- See ../reset/reset.txt for details.
-- reset-names: Must include the following entries:
- - gpu
-- power-domains: GPUs that make use of power domains can define this property
- instead of vdd-supply. Currently "nvidia,gp10b" makes use of this.
-
-Optional properties:
-- iommus: A reference to the IOMMU. See ../iommu/iommu.txt for details.
-
-Example for GK20A:
-
- gpu@...00000 {
- compatible = "nvidia,gk20a";
- reg = <0x0 0x57000000 0x0 0x01000000>,
- <0x0 0x58000000 0x0 0x01000000>;
- interrupts = <GIC_SPI 157 IRQ_TYPE_LEVEL_HIGH>,
- <GIC_SPI 158 IRQ_TYPE_LEVEL_HIGH>;
- interrupt-names = "stall", "nonstall";
- vdd-supply = <&vdd_gpu>;
- clocks = <&tegra_car TEGRA124_CLK_GPU>,
- <&tegra_car TEGRA124_CLK_PLL_P_OUT5>;
- clock-names = "gpu", "pwr";
- resets = <&tegra_car 184>;
- reset-names = "gpu";
- iommus = <&mc TEGRA_SWGROUP_GPU>;
- };
-
-Example for GM20B:
-
- gpu@...00000 {
- compatible = "nvidia,gm20b";
- reg = <0x0 0x57000000 0x0 0x01000000>,
- <0x0 0x58000000 0x0 0x01000000>;
- interrupts = <GIC_SPI 157 IRQ_TYPE_LEVEL_HIGH>,
- <GIC_SPI 158 IRQ_TYPE_LEVEL_HIGH>;
- interrupt-names = "stall", "nonstall";
- clocks = <&tegra_car TEGRA210_CLK_GPU>,
- <&tegra_car TEGRA210_CLK_PLL_P_OUT5>,
- <&tegra_car TEGRA210_CLK_PLL_G_REF>;
- clock-names = "gpu", "pwr", "ref";
- resets = <&tegra_car 184>;
- reset-names = "gpu";
- iommus = <&mc TEGRA_SWGROUP_GPU>;
- };
-
-Example for GP10B:
-
- gpu@...00000 {
- compatible = "nvidia,gp10b";
- reg = <0x0 0x17000000 0x0 0x1000000>,
- <0x0 0x18000000 0x0 0x1000000>;
- interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH
- GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>;
- interrupt-names = "stall", "nonstall";
- clocks = <&bpmp TEGRA186_CLK_GPCCLK>,
- <&bpmp TEGRA186_CLK_GPU>;
- clock-names = "gpu", "pwr";
- resets = <&bpmp TEGRA186_RESET_GPU>;
- reset-names = "gpu";
- power-domains = <&bpmp TEGRA186_POWER_DOMAIN_GPU>;
- iommus = <&smmu TEGRA186_SID_GPU>;
- };
-
-Example for GV11B:
-
- gpu@...00000 {
- compatible = "nvidia,gv11b";
- reg = <0x17000000 0x1000000>,
- <0x18000000 0x1000000>;
- interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>,
- <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>;
- interrupt-names = "stall", "nonstall";
- clocks = <&bpmp TEGRA194_CLK_GPCCLK>,
- <&bpmp TEGRA194_CLK_GPU_PWR>,
- <&bpmp TEGRA194_CLK_FUSE>;
- clock-names = "gpu", "pwr", "fuse";
- resets = <&bpmp TEGRA194_RESET_GPU>;
- reset-names = "gpu";
- dma-coherent;
-
- power-domains = <&bpmp TEGRA194_POWER_DOMAIN_GPU>;
- iommus = <&smmu TEGRA194_SID_GPU>;
- };
diff --git a/Documentation/devicetree/bindings/gpu/nvidia,gk20a.yaml b/Documentation/devicetree/bindings/gpu/nvidia,gk20a.yaml
new file mode 100644
index 000000000000..4d856a8b674c
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpu/nvidia,gk20a.yaml
@@ -0,0 +1,171 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpu/nvidia,gk20a.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVIDIA Tegra Graphics Processing Units
+
+maintainers:
+ - Alexandre Courbot <acourbot@...dia.com>
+ - Jon Hunter <jonathanh@...dia.com>
+ - Thierry Reding <treding@...dia.com>
+
+properties:
+ compatible:
+ enum:
+ - nvidia,gk20a
+ - nvidia,gm20b
+ - nvidia,gp10b
+ - nvidia,gv11b
+
+ reg:
+ items:
+ - description: Bar0 register window
+ - description: Bar1 register window
+
+ interrupts:
+ items:
+ - description: Stall interrupt
+ - description: Nonstall interrupt
+
+ interrupt-names:
+ items:
+ - const: stall
+ - const: nonstall
+
+ vdd-supply:
+ description:
+ Regulator for GPU supply voltage
+
+ clocks:
+ minItems: 2
+ items:
+ - description: GPU clock
+ - description: Power clock
+ - description: Reference or fuse clock
+
+ clock-names:
+ minItems: 2
+ items:
+ - const: gpu
+ - const: pwr
+ - enum: [ ref, fuse ]
+
+ resets:
+ maxItems: 1
+
+ reset-names:
+ items:
+ - const: gpu
+
+ power-domains:
+ maxItems: 1
+
+ interconnects:
+ minItems: 4
+ maxItems: 12
+
+ interconnect-names:
+ minItems: 4
+ maxItems: 12
+
+ iommus:
+ maxItems: 1
+
+ dma-coherent: true
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - interrupt-names
+ - clocks
+ - clock-names
+ - resets
+ - reset-names
+
+allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - nvidia,gp10b
+ - nvidia,gv11b
+ then:
+ required:
+ - power-domains
+ else:
+ properties:
+ interconnects: false
+ interconnect-names: false
+
+ required:
+ - vdd-supply
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - nvidia,gp10b
+ then:
+ properties:
+ interconnects:
+ maxItems: 4
+
+ interconnect-names:
+ items:
+ - const: dma-mem
+ - const: write-0
+ - const: read-1
+ - const: write-1
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - nvidia,gv11b
+ then:
+ properties:
+ interconnects:
+ minItems: 12
+
+ interconnect-names:
+ items:
+ - const: dma-mem
+ - const: read-0-hp
+ - const: write-0
+ - const: read-1
+ - const: read-1-hp
+ - const: write-1
+ - const: read-2
+ - const: read-2-hp
+ - const: write-2
+ - const: read-3
+ - const: read-3-hp
+ - const: write-3
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/clock/tegra124-car-common.h>
+ #include <dt-bindings/memory/tegra124-mc.h>
+
+ gpu@...00000 {
+ compatible = "nvidia,gk20a";
+ reg = <0x57000000 0x01000000>,
+ <0x58000000 0x01000000>;
+ interrupts = <GIC_SPI 157 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 158 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "stall", "nonstall";
+ vdd-supply = <&vdd_gpu>;
+ clocks = <&tegra_car TEGRA124_CLK_GPU>,
+ <&tegra_car TEGRA124_CLK_PLL_P_OUT5>;
+ clock-names = "gpu", "pwr";
+ resets = <&tegra_car 184>;
+ reset-names = "gpu";
+ iommus = <&mc TEGRA_SWGROUP_GPU>;
+ };
--
2.51.0
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