linux-kernel - Re: [PATCH v5 25/32] iommu/mtk: Migrate to aggregate driver

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Date:   Sat, 15 Jan 2022 01:50:31 -0600
From:   Stephen Boyd <swboyd@...omium.org>
To:     Yong Wu <yong.wu@...iatek.com>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Douglas Anderson <dianders@...omium.org>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Rob Clark <robdclark@...il.com>,
        Russell King <rmk+kernel@....linux.org.uk>,
        Saravana Kannan <saravanak@...gle.com>,
        linux-mediatek@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, youlin.pei@...iatek.com
Subject: Re: [PATCH v5 25/32] iommu/mtk: Migrate to aggregate driver

Quoting Yong Wu (2022-01-14 23:39:52)
> On Fri, 2022-01-14 at 15:30 -0600, Stephen Boyd wrote:
> >
> > This sounds more correct to me. I'm not an expert on runtime PM
> > though
> > as I always have to read the code to remember how it works. if the
> > device isn't ready for runtime PM until the component bind function
> > is
> > called then runtime PM shouldn't be enabled on the component device.
>
> Anyway, We should update the SMI driver for this case. I prepare a
> patch into this patchset or I send it independently? which way is
> better?

I can roll it into this patch. It needs to be combined otherwise it
breaks the bisectability of the series.