linux-kernel - Re: [PATCH v4 00/34] component: Make into an aggregate bus

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Message-ID: <CAE-0n53dnsAdjBUVmDMbcvrSJEE=RPu7PGX_zaWCZ_ZBUAythA@mail.gmail.com>
Date:   Mon, 13 Dec 2021 13:43:19 -0800
From:   Stephen Boyd <swboyd@...omium.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        Arnd Bergmann <arnd@...db.de>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Chen Feng <puck.chen@...ilicon.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Christian Gmeiner <christian.gmeiner@...il.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Emma Anholt <emma@...olt.net>,
        Heiko Stübner <heiko@...ech.de>,
        Inki Dae <inki.dae@...sung.com>,
        James Qian Wang <james.qian.wang@....com>,
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        Rodrigo Vivi <rodrigo.vivi@...el.com>
Subject: Re: [PATCH v4 00/34] component: Make into an aggregate bus

Quoting Daniel Vetter (2021-12-07 10:22:15)
> On Thu, Dec 02, 2021 at 02:26:58PM -0800, Stephen Boyd wrote:
> > This series is from discussion we had on reordering the device lists for
> > drm shutdown paths[1]. I've introduced an 'aggregate' bus that we put
> > the aggregate device onto and then we probe the aggregate device once
> > all the components are probed and call component_add(). The probe/remove
> > hooks are where the bind/unbind calls go, and then a shutdown hook is
> > added that can be used to shutdown the drm display pipeline at the right
> > time.
> >
> > This works for me on my sc7180 board. I no longer get a warning from i2c
> > at shutdown that we're trying to make an i2c transaction after the i2c
> > bus has been shutdown. There's more work to do on the msm drm driver to
> > extract component device resources like clks, regulators, etc. out of
> > the component bind function into the driver probe but I wanted to move
> > everything over now in other component drivers before tackling that
> > problem.
> >
> > Tested-by tags would be appreciated, and Acked-by/Reviewed-by tags too.
>
> Thanks for pushing this forward. Unfortunately I'm completely burried and
> it's just not improving, so merge plan:
>
> - please get Greg KH to ack the bus/driver core stuff
>
> - please get one of the drm-misc committers we have from Google's Chromeos
>   team (there should be a few by now) to review&push this.

Sounds like a plan. Thanks!

>
> Otherwise I fear this might get stuck and I'd really like to avoid that.
>