linux-kernel - Re: [PATCH v14 1/2] drm: add kms driver for loongson display controller

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Message-ID: <6ff9a210-9d31-d0b0-f282-7640e95aac5e@189.cn>
Date:   Mon, 22 May 2023 19:11:48 +0800
From:   Sui Jingfeng <15330273260@....cn>
To:     WANG Xuerui <kernel@...0n.name>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, Li Yi <liyi@...ngson.cn>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian Koenig <christian.koenig@....com>,
        Emil Velikov <emil.l.velikov@...il.com>
Cc:     linaro-mm-sig@...ts.linaro.org, loongson-kernel@...ts.loongnix.cn,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Javier Martinez Canillas <javierm@...hat.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Liu Peibao <liupeibao@...ngson.cn>, linux-media@...r.kernel.org
Subject: Re: [PATCH v14 1/2] drm: add kms driver for loongson display
 controller

Hi,

On 2023/5/22 18:05, WANG Xuerui wrote:
> On 2023/5/22 17:49, Sui Jingfeng wrote:
>> Hi,
>>
>> On 2023/5/22 17:28, WANG Xuerui wrote:
>>> On 2023/5/22 17:25, Sui Jingfeng wrote:
>>>> Hi,
>>>>
>>>> On 2023/5/21 20:21, WANG Xuerui wrote:
>>>>>> + * LS3A4000/LS3A5000/LS3A6000 CPU, they are equipped with 
>>>>>> on-board video RAM
>>>>>> + * typically. While LS2K0500/LS2K1000/LS2K2000 are low cost SoCs 
>>>>>> which share
>>>>>> + * the system RAM as video RAM, they don't has a dediacated VRAM.
>>>>>
>>>>> CPU models are not typically prefixed with "LS", so "Loongson 
>>>>> 3A4000/3A5000/3A6000".
>>>>>
>>>> Here is because when you do programming, variable name should 
>>>> prefix with letters.
>>>
>>> Commit messages, comments, and log messages etc. are natural 
>>> language, so it's better to treat them differently. No problem to 
>>> keep code as-is IMO.
>>>
>> Then you get two name for a single chip,  take  LS7A1000 as an example.
>>
>> You name it as Loongson 7A1000 in commit message,  and then you have 
>> to define another name in the code,  say LS7A1000.
>>
>> "Loongson 7A1000" is too long,  not as compact as LS7A1000.
>>
>> This also avoid bind the company name to a specific product, because 
>> a company can produce many product.
>
> Nah, the existing convention is "LS7Xxxxx" for bridges


But I see there are document[1] which named LS7A1000 bridge chip as 
Loongson 7A1000 Bridge,

See [1] for reference, who is wrong in this case?


[1] 
https://loongson.github.io/LoongArch-Documentation/Loongson-7A1000-usermanual-EN