From: Luca Ceresoli <luca.ceresoli@bootlin.com>
To: Rob Herring <robh@kernel.org>
Cc: "Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Andrzej Hajda" <andrzej.hajda@intel.com>,
"Neil Armstrong" <neil.armstrong@linaro.org>,
"Robert Foss" <rfoss@kernel.org>,
"Laurent Pinchart" <Laurent.pinchart@ideasonboard.com>,
"Jonas Karlman" <jonas@kwiboo.se>,
"Jernej Skrabec" <jernej.skrabec@gmail.com>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"David Airlie" <airlied@gmail.com>,
"Daniel Vetter" <daniel@ffwll.ch>,
"Derek Kiernan" <derek.kiernan@amd.com>,
"Dragan Cvetic" <dragan.cvetic@amd.com>,
"Arnd Bergmann" <arnd@arndb.de>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Saravana Kannan" <saravanak@google.com>,
"Paul Kocialkowski" <contact@paulk.fr>,
"Hervé Codina" <herve.codina@bootlin.com>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org,
"Paul Kocialkowski" <paul.kocialkowski@bootlin.com>
Subject: Re: [PATCH v2 0/5] Add support for GE SUNH hot-pluggable connector (was: "drm: add support for hot-pluggable bridges")
Date: Tue, 14 May 2024 19:11:17 +0200 [thread overview]
Message-ID: <20240514191117.519b274c@booty> (raw)
In-Reply-To: <20240510164449.GB336987-robh@kernel.org>
Hello Rob,
On Fri, 10 May 2024 11:44:49 -0500
Rob Herring <robh@kernel.org> wrote:
> On Fri, May 10, 2024 at 09:10:36AM +0200, Luca Ceresoli wrote:
[...]
> > Overall approach
> > ================
> >
> > Device tree overlays appear as the most natural solution to support the
> > addition and removal of devices from a running system.
> >
> > Several features are missing from the mainline Linux kernel in order to
> > support this use case:
> >
> > 1. runtime (un)loading of device tree overlays is not supported
>
> Not true. Device specific applying of overlays has been supported
> since we merged DT overlay support. What's not supported is a general
> purpose interface to userspace to change any part of the DT at any point
> in time.
I think I should replace "supported" with "exposed [to user space]". In
other words, there is no user of of_overlay_fdt_apply() /
of_overlay_remove*() in mainline Linux, except in unittest. Would it be
a correct rewording?
> > 2. if enabled, overlay (un)loading exposes several bugs
>
> Hence why there is no general purpose interface.
Absolutely.
Best regards,
Luca
--
Luca Ceresoli, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
next prev parent reply other threads:[~2024-05-14 17:11 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-10 7:10 [PATCH v2 0/5] Add support for GE SUNH hot-pluggable connector (was: "drm: add support for hot-pluggable bridges") Luca Ceresoli
2024-05-10 7:10 ` [PATCH v2 1/5] dt-bindings: connector: add GE SUNH hotplug addon connector Luca Ceresoli
2024-05-10 8:41 ` Rob Herring (Arm)
2024-05-10 10:37 ` Luca Ceresoli
2024-05-10 13:22 ` Rob Herring
2024-05-10 14:39 ` Luca Ceresoli
2024-05-10 16:36 ` Rob Herring
2024-05-14 16:51 ` Luca Ceresoli
2024-06-05 14:45 ` Rob Herring
2024-06-11 14:43 ` Luca Ceresoli
2024-05-10 7:10 ` [PATCH v2 2/5] drm/bridge: add bridge notifier to be notified of bridge addition and removal Luca Ceresoli
2024-05-10 7:10 ` [PATCH v2 3/5] drm/encoder: add drm_encoder_cleanup_from() Luca Ceresoli
2024-05-10 7:10 ` [PATCH v2 4/5] drm/bridge: hotplug-bridge: add driver to support hot-pluggable DSI bridges Luca Ceresoli
2024-05-10 7:10 ` [PATCH v2 5/5] misc: add ge-addon-connector driver Luca Ceresoli
2024-05-10 7:55 ` Greg Kroah-Hartman
2024-05-10 10:24 ` Arnd Bergmann
2024-05-10 10:54 ` Luca Ceresoli
2024-05-10 10:57 ` Arnd Bergmann
2024-05-10 15:32 ` Luca Ceresoli
2024-05-10 10:54 ` Luca Ceresoli
2024-05-10 11:03 ` Greg Kroah-Hartman
2024-05-10 16:44 ` [PATCH v2 0/5] Add support for GE SUNH hot-pluggable connector (was: "drm: add support for hot-pluggable bridges") Rob Herring
2024-05-14 17:11 ` Luca Ceresoli [this message]
2024-05-16 13:22 ` Daniel Vetter
2024-05-20 12:01 ` Luca Ceresoli
2024-05-21 12:01 ` Daniel Vetter
2024-06-05 14:47 ` Luca Ceresoli
2024-08-23 10:39 ` Luca Ceresoli
2024-08-27 16:37 ` Daniel Vetter
2024-09-09 13:26 ` Luca Ceresoli
2024-09-24 8:26 ` Simona Vetter
2024-09-25 10:58 ` Luca Ceresoli
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