linux-kernel - Re: [PATCH] dt-bindings: display/msm/gmu: fix the schema being not applied

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Date: Tue, 25 Jun 2024 16:51:27 -0600
From: Rob Herring <robh@...nel.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Rob Clark <robdclark@...il.com>,
	Abhinav Kumar <quic_abhinavk@...cinc.com>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Sean Paul <sean@...rly.run>,
	Marijn Suijten <marijn.suijten@...ainline.org>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Akhil P Oommen <quic_akhilpo@...cinc.com>
Subject: Re: [PATCH] dt-bindings: display/msm/gmu: fix the schema being not
 applied

On Sun, Jun 23, 2024 at 02:59:30PM +0200, Krzysztof Kozlowski wrote:
> dtschema v2024.4, v2024.5 and maybe earlier do not select device nodes for

That should be just since db9c05a08709 ("validator: Rework selecting 
schemas for validation") AKA the 6x speed up in v2024.04.

> 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.

The issue is we only look at the first compatible. I'm testing out a fix 
and will apply it tomorrow assuming no issues. With that, I don't think 
we should apply this patch.

> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> ---
> 
> Cc: Akhil P Oommen <quic_akhilpo@...cinc.com>
> ---
>  .../devicetree/bindings/display/msm/gmu.yaml         | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/msm/gmu.yaml b/Documentation/devicetree/bindings/display/msm/gmu.yaml
> index b3837368a260..8d1b515f59ec 100644
> --- a/Documentation/devicetree/bindings/display/msm/gmu.yaml
> +++ b/Documentation/devicetree/bindings/display/msm/gmu.yaml
> @@ -17,6 +17,18 @@ description: |
>    management and support to improve power efficiency and reduce the load on
>    the CPU.
>  
> +# dtschema does not select nodes based on pattern+const, so add custom select
> +# as a work-around:
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        enum:
> +          - qcom,adreno-gmu
> +          - qcom,adreno-gmu-wrapper
> +  required:
> +    - compatible
> +
>  properties:
>    compatible:
>      oneOf:
> -- 
> 2.43.0
>