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

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Date: Wed, 26 Jun 2024 08:19:18 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Rob Herring <robh@...nel.org>
Cc: Rob Clark <robdclark@...il.com>, Abhinav Kumar
 <quic_abhinavk@...cinc.com>, 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 26/06/2024 06:31, Dmitry Baryshkov wrote:
> On Tue, Jun 25, 2024 at 04:51:27PM GMT, Rob Herring wrote:
>> 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.
> 
> I think we ended up picking up the next iteration of the patch, but we
> can probably land a revert later.

gpu patch was applied. This is gmu, so can be just ignored/skipped.
Anyway the code here should not have negative effect, so we can revert
it anytime later, e.g. when users upgrade to fixed dtschema.

Best regards,
Krzysztof