netdev - Re: [PATCH v1 07/14] dt-bindings: display: mediatek,ufoe: Add mediatek,gce-client-reg property

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Message-ID: <f6b9158b-4e73-4a5f-95b5-bacb6ea2e185@collabora.com>
Date: Wed, 10 Sep 2025 12:45:12 -0300
From: Ariel D'Alessandro <ariel.dalessandro@...labora.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: airlied@...il.com, amergnat@...libre.com, andrew+netdev@...n.ch,
 andrew-ct.chen@...iatek.com, angelogioacchino.delregno@...labora.com,
 broonie@...nel.org, chunkuang.hu@...nel.org, ck.hu@...iatek.com,
 conor+dt@...nel.org, davem@...emloft.net, dmitry.torokhov@...il.com,
 edumazet@...gle.com, flora.fu@...iatek.com, houlong.wei@...iatek.com,
 jeesw@...fas.com, jmassot@...labora.com, kernel@...labora.com,
 krzk+dt@...nel.org, kuba@...nel.org,
 kyrie.wu@...iatek.corp-partner.google.com, lgirdwood@...il.com,
 linus.walleij@...aro.org, louisalexis.eyraud@...labora.com,
 maarten.lankhorst@...ux.intel.com, matthias.bgg@...il.com,
 mchehab@...nel.org, minghsiu.tsai@...iatek.com, mripard@...nel.org,
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 tiffany.lin@...iatek.com, tzimmermann@...e.de, yunfei.dong@...iatek.com,
 devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
 linux-gpio@...r.kernel.org, linux-input@...r.kernel.org,
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Subject: Re: [PATCH v1 07/14] dt-bindings: display: mediatek,ufoe: Add
 mediatek,gce-client-reg property

Krzysztof,

On 9/10/25 11:21 AM, Krzysztof Kozlowski wrote:
> On 10/09/2025 16:04, Ariel D'Alessandro wrote:
>> Krzysztof,
>>
>> On 8/21/25 3:50 AM, Krzysztof Kozlowski wrote:
>>> On Wed, Aug 20, 2025 at 02:12:55PM -0300, Ariel D'Alessandro wrote:
>>>> Current, the DT bindings for Mediatek UFOe (Unified Frame Optimization
>>>> engine) is missing the mediatek,gce-client-reg property. Add it and
>>>
>>> Why is it missing? If the binding is complete, it cannot be missing...
>>
>> Due to the following error:
>>
>> $ make -j$(nproc) CHECK_DTBS=y mediatek/mt8173-elm.dtb
>>     SCHEMA  Documentation/devicetree/bindings/processed-schema.json
>>     DTC [C] arch/arm64/boot/dts/mediatek/mt8173-elm.dtb
>> [...]
>> arch/arm64/boot/dts/mediatek/mt8173-elm.dtb: ufoe@...1a000
>> (mediatek,mt8173-disp-ufoe): 'mediatek,gce-client-reg' does not match
>> any of the regexes: '^pinctrl-[0-9]+$'
>> 	from schema $id:
>> http://devicetree.org/schemas/display/mediatek/mediatek,ufoe.yaml#
> 
> So there are users of it? Then please explain that.

Ack. Will fix in v2. Thanks.

> 
>>
>>>
>>>> update the example as well.
>>>>
>>>> Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@...labora.com>
>>>> ---
>>>>    .../bindings/display/mediatek/mediatek,ufoe.yaml      | 11 +++++++++++
>>>>    1 file changed, 11 insertions(+)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,ufoe.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,ufoe.yaml
>>>> index 61a5e22effbf2..ecb4c0359fec3 100644
>>>> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,ufoe.yaml
>>>> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,ufoe.yaml
>>>> @@ -64,6 +64,14 @@ properties:
>>>>          - port@0
>>>>          - port@1
>>>>    
>>>> +  mediatek,gce-client-reg:
>>>> +    description: The register of client driver can be configured by gce with
>>>> +      4 arguments defined in this property, such as phandle of gce, subsys id,
>>>> +      register offset and size. Each GCE subsys id is mapping to a client
>>>
>>> Don't explain what DT syntax is. We all know, so that's completely
>>> redundant description. Explain the purpose. Explain Arguments with sechema - items.
>>
>> Although I agree with your suggestions, this is exactly how the rest of
>> the Mediatek DT bindings describe this node. This patch is based on the
>> other +20 files, which describe the node in the same way.
> 
> 
> Last time I tried to fix something for Mediatek display I got
> condescending and useless review from Collabora, so I won't be bothering
> with fixing these bindings to make your job easier. I don't care, you
> can thank someone inside. Therefore other poor bindings are not a valid
> excuse for this patch not being correct.

I see. Will rework this properly in v2.

Thanks,

-- 
Ariel D'Alessandro
Software Engineer

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