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Message-ID: <b1f42bab-7670-c099-8c7a-882f7268b358@collabora.com>
Date:   Mon, 16 Oct 2023 10:01:17 +0200
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Subject: Re: [PATCH v7 15/16] dt-bindings: display: mediatek: split: add
 compatible for MT8195
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To:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Moudy Ho <moudy.ho@mediatek.com>,
        Chun-Kuang Hu <chunkuang.hu@kernel.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc:     dri-devel@lists.freedesktop.org,
        linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org
References: <20231012084037.19376-1-moudy.ho@mediatek.com>
 <20231012084037.19376-16-moudy.ho@mediatek.com>
 <e58ecc95-5133-4542-8178-338583bca2ab@linaro.org>
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>
In-Reply-To: <e58ecc95-5133-4542-8178-338583bca2ab@linaro.org>
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Il 13/10/23 08:52, Krzysztof Kozlowski ha scritto:
> On 12/10/2023 10:40, Moudy Ho wrote:
>> Add compatible string and GCE property for MT8195 SPLIT, of
>> which is operated by MDP3.
>>
>> Signed-off-by: Moudy Ho <moudy.ho@mediatek.com>
> 
> 
>> +allOf:
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            const: mediatek,mt8195-mdp3-split
>> +
>> +    then:
>> +      required:
>> +        - mediatek,gce-client-reg
> 
> else:
>    mediatek,gce-client-reg: false
> 
> 

Technically, all of the display components do support GCE, using it is
a matter of preference, so disallowing gce-client-reg on anything that
is not mt8195-mdp3-split is *technically* wrong, as much as not having
that from the beginning was also technically wrong... :-)

P.S.: The driver for the display split component doesn't use GCE yet,
only mdp3 for now, but again, it's the driver - while the HW is actually
capable of using that

Cheers,
Angelo

>> +
>>   additionalProperties: false
>>   
>>   examples:
> 
> Best regards,
> Krzysztof
>