linux-kernel - Re: [PATCH v3 1/3] drm/msm/dpu: re-introduce dpu core revision to the catalog

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Message-ID: <bf2f0e5c-79d7-6160-88fc-b79fc18bbfe0@linaro.org>
Date:   Fri, 30 Jun 2023 06:19:22 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Abhinav Kumar <quic_abhinavk@...cinc.com>,
        freedreno@...ts.freedesktop.org, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     dri-devel@...ts.freedesktop.org, quic_jesszhan@...cinc.com,
        andersson@...nel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/3] drm/msm/dpu: re-introduce dpu core revision to the
 catalog

On 30/06/2023 06:17, Abhinav Kumar wrote:
> 
> 
> On 6/29/2023 5:24 PM, Dmitry Baryshkov wrote:
>> On 29/06/2023 22:29, Abhinav Kumar wrote:
>>> With [1] dpu core revision was dropped in favor of using the
>>> compatible string from the device tree to select the dpu catalog
>>> being used in the device.
>>>
>>> This approach works well however also necessitates adding catalog
>>> entries for small register level details as dpu capabilities and/or
>>> features bloating the catalog unnecessarily. Examples include but
>>> are not limited to data_compress, interrupt register set, widebus etc.
>>
>> Generic note: this description can be moved to the cover letter, it 
>> covers the series intent.
>>
> 
> I kept it here as I didnt really have a cover letter but I can add one 
> and move this there.

Yes, please. I suppose that any series of more than a single non-trivial 
patch should have a cover letter, which describes the intentions and the 
ideas behind the series.

> 
>>> Introduce the dpu core revision back as an entry to the catalog so that
>>> we can just use dpu revision checks and enable those bits which
>>> should be enabled unconditionally and not controlled by a catalog
>>> and also simplify the changes to do something like:
>>>
>>> if (dpu_core_revision > xxxxx && dpu_core_revision < xxxxx)
>>>     enable the bit;
>>>
>>> Since dpu's major and minor versions are now separate fields, lets
>>> drop all the DPU_HW_VER macros.
>>>
>>> [1]: https://patchwork.freedesktop.org/patch/530891/?series=113910&rev=4
>>
>> Please use `commit aabbcc ("do this and that")' in the commit messages.
>>
> 
> Ack.
> 
>>>
>>> changes in v3:
>>>     - drop DPU step version as features are not changing across steps
>>>     - add core_major_version / core_minor_version to avoid conflicts
>>>     - update the commit text to drop references to the dpu macros
>>>
>>> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
>>

-- 
With best wishes
Dmitry