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Message-ID: <aadbb452-506d-89cc-28d9-497369c0018e@samsung.com>
Date:   Thu, 3 Nov 2022 13:44:04 +0100
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Subject: Re: [PATCH 2/3] media: s5p-mfc:Add variant data for MFC v7 hardware
 for Exynos 3250 SOC
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To:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Aakarsh Jain <aakarsh.jain@samsung.com>,
        linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org,
        linux-kernel@vger.kernel.org, devicetree@vger.kernel.org
Cc:     andrzej.hajda@intel.com, mchehab@kernel.org,
        hverkuil-cisco@xs4all.nl, ezequiel@vanguardiasur.com.ar,
        jernej.skrabec@gmail.com, benjamin.gaignard@collabora.com,
        krzysztof.kozlowski+dt@linaro.org, stanimir.varbanov@linaro.org,
        dillon.minfei@gmail.com, david.plowman@raspberrypi.com,
        mark.rutland@arm.com, robh+dt@kernel.org, krzk+dt@kernel.org,
        andi@etezian.org, alim.akhtar@samsung.com,
        aswani.reddy@samsung.com, pankaj.dubey@samsung.com,
        smitha.t@samsung.com
From:   Marek Szyprowski <m.szyprowski@samsung.com>
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References: <20221102130602.48969-1-aakarsh.jain@samsung.com>
        <CGME20221102125813epcas5p40a38f17a267276ff8b2bc5861b5d450d@epcas5p4.samsung.com>
        <20221102130602.48969-2-aakarsh.jain@samsung.com>
        <c55d29d2-a70a-f2ae-b605-1c63051202bf@linaro.org>
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On 03.11.2022 13:35, Krzysztof Kozlowski wrote:
> On 02/11/2022 09:06, Aakarsh Jain wrote:
>> commit "5441e9dafdfc6dc40fa" which adds mfc v7 support for
> Please run scripts/checkpatch.pl and fix reported warnings.
>
>> Exynos3250 and used the same compatible string as used by
>> Exynos5240 but both the IPs are a bit different in terms of
>> IP clock.
>> Lets add variant driver data based on the new compatible string
>> "samsung,exynos3250-mfc" for Exynos3250 SoC.
> Aren't you just missing the clock on Exynos3250?

Nope, the Exynos3250 variant indeed has only one clock and the driver 
code simply ignored the -ENOENT error while getting the clocks, see the 
code in drivers/media/platform/samsung/s5p-mfc/s5p_mfc_pm.c, so it 
worked fine even without it.

IMHO it is a good idea to clean this up.

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland