linux-kernel - [PATCH 1/2] dt-bindings: Add Apple SoC GPU

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Message-Id: <20250611-sgx-dt-v1-1-7a11f3885c60@gmail.com>
Date: Wed, 11 Jun 2025 19:32:16 +0200
From: Sasha Finkelstein via B4 Relay <devnull+fnkl.kernel.gmail.com@...nel.org>
To: Sven Peter <sven@...nel.org>, Janne Grunau <j@...nau.net>, 
 Alyssa Rosenzweig <alyssa@...enzweig.io>, Neal Gompa <neal@...pa.dev>, 
 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>
Cc: asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Sasha Finkelstein <fnkl.kernel@...il.com>
Subject: [PATCH 1/2] dt-bindings: Add Apple SoC GPU

From: Sasha Finkelstein <fnkl.kernel@...il.com>

Add bindings for the GPU present in Apple SoCs

Signed-off-by: Sasha Finkelstein <fnkl.kernel@...il.com>
---
 Documentation/devicetree/bindings/gpu/apple,agx.yaml | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 MAINTAINERS                                          |  1 +
 2 files changed, 96 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpu/apple,agx.yaml b/Documentation/devicetree/bindings/gpu/apple,agx.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..23df3ebd689b1e885eb99ca573343fe7f2d09dc4
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpu/apple,agx.yaml
@@ -0,0 +1,95 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpu/apple,agx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple SoC GPU
+
+maintainers:
+  - Sasha Finkelstein <fnkl.kernel@...il.com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - const: apple,agx-g13g
+      - items:
+          - enum:
+              - apple,agx-g13s
+              - apple,agx-g13c
+              - apple,agx-g13d
+          - const: apple,agx-g13x
+      - items:
+          - const: apple,agx-g14g
+  reg:
+    items:
+      - description: ASC coprocessor control
+      - description: GPU block MMIO registers
+
+  reg-names:
+    items:
+      - const: asc
+      - const: sgx
+
+  power-domains:
+    maxItems: 1
+
+  mboxes:
+    maxItems: 1
+
+  memory-region:
+    items:
+      - description: Region containing GPU MMU TTBs
+      - description: Region containing GPU MMU page tables
+      - description:
+          Region containing a shared handoff structure for VM
+          management coordination
+      - description: Driver-opaque calibration blob
+      - description: Calibration blob
+      - description: Shared global variables with GPU firmware
+
+  memory-region-names:
+    items:
+      - const: ttbs
+      - const: pagetables
+      - const: handoff
+      - const: hw-cal-a
+      - const: hw-cal-b
+      - const: globals
+
+  apple,firmware-compat:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 3
+    description:
+      MacOS version the current firmware is paired with, used to pick
+      the version of firmware ABI to be used.
+      Bootloader will overwrite this
+
+required:
+  - compatible
+  - reg
+  - mboxes
+  - memory-region
+  - apple,firmware-compat
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/apple-aic.h>
+    gpu@...0000 {
+        compatible = "apple,agx-g13g";
+        reg = <0x6400000 0x40000>,
+              <0x4000000 0x1000000>;
+        reg-names = "asc", "sgx";
+        mboxes = <&agx_mbox>;
+        power-domains = <&ps_gfx>;
+        memory-region = <&uat_ttbs>, <&uat_pagetables>, <&uat_handoff>,
+                        <&gpu_hw_cal_a>, <&gpu_hw_cal_b>, <&gpu_globals>;
+        memory-region-names = "ttbs", "pagetables", "handoff",
+                              "hw-cal-a", "hw-cal-b", "globals";
+
+        apple,firmware-compat = <0 0 0>;
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index a92290fffa163f9fe8fe3f04bf66426f9a894409..2a32c9c4ee355a1109a3e2031ea3663c39cc8c68 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2331,6 +2331,7 @@ F:	Documentation/devicetree/bindings/arm/apple/*
 F:	Documentation/devicetree/bindings/clock/apple,nco.yaml
 F:	Documentation/devicetree/bindings/cpufreq/apple,cluster-cpufreq.yaml
 F:	Documentation/devicetree/bindings/dma/apple,admac.yaml
+F:	Documentation/devicetree/bindings/gpu/apple,agx.yaml
 F:	Documentation/devicetree/bindings/i2c/apple,i2c.yaml
 F:	Documentation/devicetree/bindings/input/touchscreen/apple,z2-multitouch.yaml
 F:	Documentation/devicetree/bindings/interrupt-controller/apple,*

-- 
2.49.0