linux-kernel - Re: [RFC PATCH v10 6/9] media: tegra: Add Tegra210 Video input driver

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Message-ID: <01949632-c7e9-2b44-2c52-2d40e1632347@gmail.com>
Date:   Sun, 26 Apr 2020 08:48:34 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Sowjanya Komatineni <skomatineni@...dia.com>,
        Hans Verkuil <hverkuil@...all.nl>, thierry.reding@...il.com,
        jonathanh@...dia.com, frankc@...dia.com, sakari.ailus@....fi,
        helen.koike@...labora.com
Cc:     sboyd@...nel.org, linux-media@...r.kernel.org,
        devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v10 6/9] media: tegra: Add Tegra210 Video input driver

26.04.2020 07:23, Sowjanya Komatineni пишет:
> 
> On 4/25/20 7:19 PM, Dmitry Osipenko wrote:
>> External email: Use caution opening links or attachments
>>
>>
>> 26.04.2020 05:10, Dmitry Osipenko пишет:
>> ...
>>>> currently other Tegra host1x driver (drm) also does similar. Single
>>>> module for all Tegra SoCs.
>>> DRM driver has a proper separation of the sub-drivers where sub-driver
>>> won't load on unsupported hardware. The tegra-video driver should do the
>>> same, i.e. VI and CSI should be individual drivers (and not OPS). There
>>> could be a some common core, but for now it's not obvious to me what
>>> that core should be, maybe just the video.c.
>> Maybe video.c csi.c vi.c could be moved into a separate module, somewhat
>> like a common driver framework. Then the individual CSI/VI drivers will
>> use those common helpers.. Just a quick thought.
> 
> structure of driver is based on prior feedback.
> 
> How about instead of re-structuring whole driver again, probably we can
> use conditional compatibles and also corresponding tegra210.o in
> Makefile based on ARCH_TEGRA?
> 
> #if defined(CONFIG_ARCH_TEGRA_210_SOC)
>     { .compatible = "nvidia,tegra210-vi", .data = &tegra210_vi_soc },
> #endif

Yes, allowing user to disable the unneeded code should be good.