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

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Message-ID: <a37db87d-c3b1-4ce4-bec0-4f496dc209b5@kernel.org>
Date: Wed, 10 Sep 2025 16:21:21 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Ariel D'Alessandro <ariel.dalessandro@...labora.com>
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,
 p.zabel@...gutronix.de, pabeni@...hat.com, robh@...nel.org,
 sean.wang@...nel.org, simona@...ll.ch, support.opensource@...semi.com,
 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,
 linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
 linux-mediatek@...ts.infradead.org, linux-sound@...r.kernel.org,
 netdev@...r.kernel.org
Subject: Re: [PATCH v1 07/14] dt-bindings: display: mediatek,ufoe: Add
 mediatek,gce-client-reg property

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.

> 
>>
>>> 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.

Best regards,
Krzysztof