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From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 0/8] component helper improvements
Date: Sun, 27 Apr 2014 14:32:37 +0100	[thread overview]
Message-ID: <20140427133237.GD26756@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <CAKMK7uFE7NVTS8dgb7kmXtAcz2Q59WhxrZJWcktG98UegFW1zA@mail.gmail.com>

On Sun, Apr 27, 2014 at 02:51:30PM +0200, Daniel Vetter wrote:
> On Sun, Apr 27, 2014 at 1:00 AM, Russell King - ARM Linux
> <linux@arm.linux.org.uk> wrote:
> > A while back, Laurent raised some comments about the component helper,
> > which this patch set starts to address.
> >
> > The first point it addresses is the repeated parsing inefficiency when
> > deferred probing occurs.  When DT is used, the structure of the
> > component helper today means that masters end up parsing the device
> > tree for each attempt to re-bind the driver.
> >
> > We remove this inefficiency by creating an array of matching data and
> > functions, which the component helper can use internally to match up
> > components to their master.
> >
> > The second point was the inefficiency of destroying the list of
> > components each time we saw a failure.  We did this to ensure that
> > we kept things correctly ordered: component bind order matters.
> > As we have an array instead, the array is already ordered, so we
> > use this array to store the component pointers instead of a list,
> > and remember which are duplicates (and thus should be avoided.)
> > Avoiding the right duplicates matters as we walk the array in the
> > opposite direction at tear down.
> >
> > I would like to see patches 1-5 scheduled for the next merge window,
> > with 6-8 for the following window - this gives us grace of one kernel
> > cycle to ensure that any new component helper users are properly
> > converted.
> 
> Afaict the actual patches haven't made it to dri-devel, only to
> linux-arm-kernel. Are they stuck somewhere?

The patches themselves end up being Cc'd depending on their content and
the contents of the MAINTAINERS file, unless I specifically tell my
scripts that the patches are to be sent to/cc people - generally I do
that for the primary recipients of the series.

That means only the patch(es) which touch DRM stuff were copied to
dri-devel, in this case, that being the MSM one.

-- 
FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly
improving, and getting towards what was expected from it.

WARNING: multiple messages have this Message-ID (diff)
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: devel@driverdev.osuosl.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	dri-devel <dri-devel@lists.freedesktop.org>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [RFC PATCH 0/8] component helper improvements
Date: Sun, 27 Apr 2014 14:32:37 +0100	[thread overview]
Message-ID: <20140427133237.GD26756@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <CAKMK7uFE7NVTS8dgb7kmXtAcz2Q59WhxrZJWcktG98UegFW1zA@mail.gmail.com>

On Sun, Apr 27, 2014 at 02:51:30PM +0200, Daniel Vetter wrote:
> On Sun, Apr 27, 2014 at 1:00 AM, Russell King - ARM Linux
> <linux@arm.linux.org.uk> wrote:
> > A while back, Laurent raised some comments about the component helper,
> > which this patch set starts to address.
> >
> > The first point it addresses is the repeated parsing inefficiency when
> > deferred probing occurs.  When DT is used, the structure of the
> > component helper today means that masters end up parsing the device
> > tree for each attempt to re-bind the driver.
> >
> > We remove this inefficiency by creating an array of matching data and
> > functions, which the component helper can use internally to match up
> > components to their master.
> >
> > The second point was the inefficiency of destroying the list of
> > components each time we saw a failure.  We did this to ensure that
> > we kept things correctly ordered: component bind order matters.
> > As we have an array instead, the array is already ordered, so we
> > use this array to store the component pointers instead of a list,
> > and remember which are duplicates (and thus should be avoided.)
> > Avoiding the right duplicates matters as we walk the array in the
> > opposite direction at tear down.
> >
> > I would like to see patches 1-5 scheduled for the next merge window,
> > with 6-8 for the following window - this gives us grace of one kernel
> > cycle to ensure that any new component helper users are properly
> > converted.
> 
> Afaict the actual patches haven't made it to dri-devel, only to
> linux-arm-kernel. Are they stuck somewhere?

The patches themselves end up being Cc'd depending on their content and
the contents of the MAINTAINERS file, unless I specifically tell my
scripts that the patches are to be sent to/cc people - generally I do
that for the primary recipients of the series.

That means only the patch(es) which touch DRM stuff were copied to
dri-devel, in this case, that being the MSM one.

-- 
FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly
improving, and getting towards what was expected from it.

  reply	other threads:[~2014-04-27 13:32 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-26 23:00 [RFC PATCH 0/8] component helper improvements Russell King - ARM Linux
2014-04-26 23:00 ` Russell King - ARM Linux
2014-04-26 23:01 ` [PATCH RFC 1/8] component: fix missed cleanup in case of devres failure Russell King
2014-04-26 23:01 ` [PATCH RFC 2/8] component: ignore multiple additions of the same component Russell King
2014-04-26 23:01 ` [PATCH RFC 3/8] component: add support for component match array Russell King
2014-04-28  9:21   ` Thierry Reding
2014-06-24 19:08     ` Russell King - ARM Linux
2014-04-26 23:02 ` [PATCH RFC 4/8] drm: msm: update to use component match support Russell King
2014-04-26 23:02   ` Russell King
2014-04-27 15:49   ` Rob Clark
2014-04-27 15:49     ` Rob Clark
2014-04-26 23:02 ` [PATCH RFC 5/8] imx-drm: " Russell King
2014-04-26 23:02 ` [PATCH RFC 6/8] component: remove old add_components method Russell King
2014-04-28  7:07   ` Thierry Reding
2014-04-28 10:28     ` Russell King - ARM Linux
2014-04-28 10:52       ` Thierry Reding
2014-04-26 23:02 ` [PATCH RFC 7/8] component: move check for unbound master into try_to_bring_up_masters() Russell King
2014-04-28  7:10   ` Thierry Reding
2014-04-26 23:02 ` [PATCH RFC 8/8] component: track components via array rather than list Russell King
2014-04-27  9:43 ` [PATCH RFC 1/8] component: fix missed cleanup in case of devres failure Russell King
2014-04-27 12:51 ` [RFC PATCH 0/8] component helper improvements Daniel Vetter
2014-04-27 12:51   ` Daniel Vetter
2014-04-27 13:32   ` Russell King - ARM Linux [this message]
2014-04-27 13:32     ` Russell King - ARM Linux
2014-05-14 18:42 ` Thierry Reding
2014-05-14 18:42   ` Thierry Reding
2014-07-02 11:12   ` Russell King - ARM Linux
2014-07-02 11:12     ` Russell King - ARM Linux

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