linux-kernel - [PATCH v2 4/4] dt-bindings: display/msm/gpu: fix the schema being not applied

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Date: Sun, 23 Jun 2024 22:03:03 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, 
 Abhinav Kumar <quic_abhinavk@...cinc.com>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...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: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v2 4/4] dt-bindings: display/msm/gpu: fix the schema being
 not applied

dtschema v2024.4, v2024.5 and maybe earlier do not select device nodes for
given binding validation if the schema contains compatible list with
pattern and a const fallback.  This leads to binding being a no-op - not
being applied at all.  Issue should be fixed in the dtschema but for now
add a work-around do the binding can be used against DTS validation.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

---

This will uncover issues with DTS, which is expected and fixed in:
1. Incorrect AMD compatible:
   https://lore.kernel.org/linux-arm-msm/20240623193420.333735-1-krzysztof.kozlowski@linaro.org/T/#t

2. alwayson clock:
   https://lore.kernel.org/linux-arm-msm/20240121194221.13513-6-a39.skl@gmail.com/
---
 Documentation/devicetree/bindings/display/msm/gpu.yaml | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/msm/gpu.yaml b/Documentation/devicetree/bindings/display/msm/gpu.yaml
index 03aaced1abda..6ddc72fd85b0 100644
--- a/Documentation/devicetree/bindings/display/msm/gpu.yaml
+++ b/Documentation/devicetree/bindings/display/msm/gpu.yaml
@@ -10,6 +10,18 @@ title: Adreno or Snapdragon GPUs
 maintainers:
   - Rob Clark <robdclark@...il.com>
 
+# dtschema does not select nodes based on pattern+const, so add custom select
+# as a work-around:
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - qcom,adreno
+          - amd,imageon
+  required:
+    - compatible
+
 properties:
   compatible:
     oneOf:

-- 
2.43.0