linux-kernel - Re: [PATCH v4 3/6] dt-bindings: drm/msm/gpu: Document AON clock for A505/A506/A510

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Message-ID: <377a7af9-89da-44e6-94f9-eebdd3921c91@kernel.org>
Date: Mon, 17 Mar 2025 16:18:43 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Barnabás Czémán <barnabas.czeman@...nlining.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Stephan Gerhold <stephan@...hold.net>,
 Otto Pflüger <otto.pflueger@...cue.de>,
 Linus Walleij <linus.walleij@...aro.org>, Lee Jones <lee@...nel.org>,
 Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
 Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
 Robin Murphy <robin.murphy@....com>, Konrad Dybcio <konradybcio@...nel.org>,
 Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
 Abhinav Kumar <quic_abhinavk@...cinc.com>,
 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>,
 Dmitry Baryshkov <lumag@...nel.org>, linux-arm-msm@...r.kernel.org,
 linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
 iommu@...ts.linux.dev, dri-devel@...ts.freedesktop.org,
 freedreno@...ts.freedesktop.org, phone-devel@...r.kernel.org,
 ~postmarketos/upstreaming@...ts.sr.ht, linux@...nlining.org,
 Adam Skladowski <a39.skl@...il.com>
Subject: Re: [PATCH v4 3/6] dt-bindings: drm/msm/gpu: Document AON clock for
 A505/A506/A510

On 17/03/2025 10:48, Barnabás Czémán wrote:
> 
> 
> On March 17, 2025 10:21:50 AM GMT+01:00, Krzysztof Kozlowski <krzk@...nel.org> wrote:
>> On Sat, Mar 15, 2025 at 03:57:37PM +0100, Barnabás Czémán wrote:
>>> From: Adam Skladowski <a39.skl@...il.com>
>>>
>>> Adreno 505 (MSM8937), Adreno 506(MSM8953) and Adreno 510(MSM8976)
>>> require Always-on branch clock to be enabled, describe it.
>>>
>>> Signed-off-by: Adam Skladowski <a39.skl@...il.com>
>>> [reword commit, move alwayson on the first place]
>>> Signed-off-by: Barnabás Czémán <barnabas.czeman@...nlining.org>
>>> ---
>>>  Documentation/devicetree/bindings/display/msm/gpu.yaml | 6 ++++--
>>>  1 file changed, 4 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/display/msm/gpu.yaml b/Documentation/devicetree/bindings/display/msm/gpu.yaml
>>> index 6ddc72fd85b04537ea270754a897b4e7eb269641..5028398cc3b517e404a92a2c30688f72eab4c1b3 100644
>>> --- a/Documentation/devicetree/bindings/display/msm/gpu.yaml
>>> +++ b/Documentation/devicetree/bindings/display/msm/gpu.yaml
>>> @@ -152,11 +152,13 @@ allOf:
>>>        properties:
>>>          clocks:
>>>            minItems: 2
>>> -          maxItems: 7
>>> +          maxItems: 8
>>>  
>>>          clock-names:
>>>            items:
>>>              anyOf:
>>> +              - const: alwayson
>>> +                description: GPU Always-On clock
>>
>> Are you adding bindings for devices which were not described previously?
>> Then don't grow this pattern, but create if:then: with a strictly
>> ordered list for them (and keeping order of other variants).
>>
> 8956, 8976, 8953 schemas are failing because of missing always-on clock.
Based on the commit msg and style of binding having a pattern instead of
compatibles, I really cannot tell whether you add new devices or fix
something for existing.

and now I dug more and found:
https://lore.kernel.org/all/f525b63f-a32c-41cf-b80f-5d85b6eb50c8@linaro.org/

There were some other patches as well :/

Best regards,
Krzysztof