linux-kernel - [PATCH v2 2/6] dt-bindings: display/msm: gpu: Document A612 GPU

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Message-Id: <20251107-qcs615-spin-2-v2-2-a2d7c4fbf6e6@oss.qualcomm.com>
Date: Fri, 07 Nov 2025 02:20:07 +0530
From: Akhil P Oommen <akhilpo@....qualcomm.com>
To: Rob Clark <robin.clark@....qualcomm.com>, Sean Paul <sean@...rly.run>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        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>,
        Jessica Zhang <jesszhan0024@...il.com>
Cc: Dan Carpenter <dan.carpenter@...aro.org>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Akhil P Oommen <akhilpo@....qualcomm.com>
Subject: [PATCH v2 2/6] dt-bindings: display/msm: gpu: Document A612 GPU

A612 GPU has a new IP called RGMU (Reduced Graphics Management Unit)
which replaces GMU. But it doesn't do clock or voltage scaling. So we
need the gpu core clock in the GPU node along with the power domain to
do clock and voltage scaling from the kernel. Update the bindings to
describe this GPU.

Signed-off-by: Akhil P Oommen <akhilpo@....qualcomm.com>
---
 .../devicetree/bindings/display/msm/gpu.yaml       | 32 ++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/msm/gpu.yaml b/Documentation/devicetree/bindings/display/msm/gpu.yaml
index 826aafdcc20b..a6bbc88e6a24 100644
--- a/Documentation/devicetree/bindings/display/msm/gpu.yaml
+++ b/Documentation/devicetree/bindings/display/msm/gpu.yaml
@@ -45,11 +45,11 @@ properties:
           - const: amd,imageon
 
   clocks:
-    minItems: 2
+    minItems: 1
     maxItems: 7
 
   clock-names:
-    minItems: 2
+    minItems: 1
     maxItems: 7
 
   reg:
@@ -387,6 +387,34 @@ allOf:
       required:
         - clocks
         - clock-names
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,adreno-612.0
+    then:
+      properties:
+        clocks:
+          items:
+            - description: GPU Core clock
+
+        clock-names:
+          items:
+            - const: core
+
+        reg:
+          items:
+            - description: GPU Reg memory
+
+        reg-names:
+          items:
+            - const: kgsl_3d0_reg_memory
+
+      required:
+        - clocks
+        - clock-names
+
     else:
       if:
         properties:

-- 
2.51.0