linux-kernel - Re: [PATCH 07/13] dt-bindings: media: camss: Add qcom,sm8550-camss binding

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Message-ID: <212c880a-9a09-4433-a049-eb15a0c32322@kernel.org>
Date: Mon, 30 Sep 2024 09:26:44 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Depeng Shao <quic_depengs@...cinc.com>,
 Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>, rfoss@...nel.org,
 todor.too@...il.com, bryan.odonoghue@...aro.org, mchehab@...nel.org,
 robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org
Cc: linux-arm-msm@...r.kernel.org, linux-media@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 kernel@...cinc.com, Yongsheng Li <quic_yon@...cinc.com>
Subject: Re: [PATCH 07/13] dt-bindings: media: camss: Add qcom,sm8550-camss
 binding

On 25/09/2024 17:13, Depeng Shao wrote:
> Hi Vladimir,
> 
> On 9/6/2024 11:56 PM, Vladimir Zapolskiy wrote:
> 
>>> +            compatible = "qcom,sm8550-camss";
>>> +
>>> +            reg = <0 0x0acb7000 0 0xd00>,
>>> +                  <0 0x0acb9000 0 0xd00>,
>>> +                  <0 0x0acbb000 0 0xd00>,
>>> +                  <0 0x0acca000 0 0xa00>,
>>> +                  <0 0x0acce000 0 0xa00>,
>>> +                  <0 0x0acb6000 0 0x1000>,
>>> +                  <0 0x0ace4000 0 0x2000>,
>>> +                  <0 0x0ace6000 0 0x2000>,
>>> +                  <0 0x0ace8000 0 0x2000>,
>>> +                  <0 0x0acea000 0 0x2000>,
>>> +                  <0 0x0acec000 0 0x2000>,
>>> +                  <0 0x0acee000 0 0x2000>,
>>> +                  <0 0x0acf0000 0 0x2000>,
>>> +                  <0 0x0acf2000 0 0x2000>,
>>> +                  <0 0x0ac62000 0 0xf000>,
>>> +                  <0 0x0ac71000 0 0xf000>,
>>> +                  <0 0x0ac80000 0 0xf000>,
>>> +                  <0 0x0accb000 0 0x2800>,
>>> +                  <0 0x0accf000 0 0x2800>;
>>
>> Please sort the list above in numerical order, this will change positions
>> of "vfe_lite0", "vfe_lite1" etc.
>>
>> Another note, since it's not possible to map less than a page, so I believe
>> it might make sense to align all sizes to 0x1000.

And if Linux behavior changes then are you going to rewrite all the DTS
for new size?

No, the sizes reflect hardware register layout, not concept of pages.

I don't think that we should be coming with more nitpicky ideas, one
month after the patch was sent and reviewed.

Best regards,
Krzysztof