linux-kernel - Re: [PATCH v5 3/3] dt-binding: mediatek: add MediaTek mt8195 MDP3 components

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <c0cf592a-3cde-4bad-431b-6d80c1970638@linaro.org>
Date:   Wed, 13 Sep 2023 10:58:38 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Moudy Ho (何宗原) <Moudy.Ho@...iatek.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "conor+dt@...nel.org" <conor+dt@...nel.org>,
        "hverkuil-cisco@...all.nl" <hverkuil-cisco@...all.nl>,
        "airlied@...il.com" <airlied@...il.com>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>
Cc:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v5 3/3] dt-binding: mediatek: add MediaTek mt8195 MDP3
 components

On 13/09/2023 10:39, Moudy Ho (何宗原) wrote:

>>> @@ -63,7 +64,6 @@ properties:
>>>  required:
>>>    - compatible
>>>    - reg
>>> -  - interrupts
>>
>> Why? commit msg tells nothing about it. Why interrupt is not erquired
>> in
>> mt8173? How dropping such requirement is anyhow related to mt8195?
>>
>>
> The signals of the MDP engines are completely controlled by MTK's MUTEX
> for starting and stopping frame processing, eliminating the need for
> additional interrupts.

Then it does not look like related to this patch at all.

...

>>>  
>>>    reg:
>>>      maxItems: 1
>>> @@ -50,17 +51,19 @@ properties:
>>>      maxItems: 1
>>>  
>>>    clocks:
>>> -    items:
>>> -      - description: RDMA clock
>>> -      - description: RSZ clock
>>> +    oneOf:
>>> +      - items:
>>> +          - description: RDMA clock
>>> +          - description: SRAM shared component clock
>>> +      - items:
>>> +          - description: RDMA clock
>>
>> Why now mt8183 can have SRAM clock optional? How changing mt8183 is
>> related to this patch?
>>
>> I'll finish the review, sorry fix basics here.
>>
>> Best regards,
>> Krzysztof
>>
> The RDMA of only the 8183 needed to share SRMA with other component due
> to the old desgin.
> I attempted to describe both the situation of the 8183 and new designs
> like the 8195, but it appears that this writing style may lead to
> misunderstandings.
> I am unsure if there are any ways to enhance it.

Just like many other bindings, just look at Qualcomm, use allOf to
restrict entries per variants.

Best regards,
Krzysztof