linux-kernel - Re: [PATCH v9 0/5] Exynos: Simple QoS for exynos-bus using interconnect

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Message-ID: <b0a8e994-06d2-e04a-579c-40580b71f760@linaro.org>
Date:   Fri, 13 Nov 2020 10:48:24 +0200
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     Sylwester Nawrocki <s.nawrocki@...sung.com>, cw00.choi@...sung.com,
        inki.dae@...sung.com
Cc:     krzk@...nel.org, devicetree@...r.kernel.org, robh+dt@...nel.org,
        a.swigon@...sung.com, myungjoo.ham@...sung.com,
        sw0312.kim@...sung.com, b.zolnierkie@...sung.com,
        m.szyprowski@...sung.com, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v9 0/5] Exynos: Simple QoS for exynos-bus using
 interconnect

On 11/12/20 16:09, Sylwester Nawrocki wrote:
> 
> This patchset adds interconnect API support for the Exynos SoC "samsung,
> exynos-bus" compatible devices, which already have their corresponding
> exynos-bus driver in the devfreq subsystem.  Complementing the devfreq
> driver with an interconnect functionality allows to ensure the QoS
> requirements of devices accessing the system memory (e.g. video processing
> devices) are fulfilled and allows to avoid issues like the one discussed
> in thread [1].
> 
> This patch series adds implementation of the interconnect provider per each
> "samsung,exynos-bus" compatible DT node, with one interconnect node per
> provider.  The interconnect code which was previously added as a part of
> the devfreq driver has been converted to a separate platform driver.
> In the devfreq a corresponding virtual child platform device is registered.
> Integration of devfreq and interconnect frameworks is achieved through
> the PM QoS API.
> 
> A sample interconnect consumer for exynos-mixer is added in patch 5/5,
> it is currently added only for exynos4412 and allows to address the
> mixer DMA underrun error issues [1].

Good work Sylwester! Thank you and all the reviewers! What would be the merge
path for this patchset? Looks like there is no build dependency between patches.
Should i take just patches 2,3 or also patch 1? Chanwoo?

Thanks,
Georgi