From: Rob Herring <robh+dt@kernel.org>
To: "Noralf Trønnes" <noralf@tronnes.org>
Cc: maxime@cerno.tech, thierry.reding@gmail.com, sam@ravnborg.org,
dave.stevenson@raspberrypi.com, david@lechnology.com,
devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH 1/3] dt-bindings: display: add bindings for MIPI DBI compatible SPI panels
Date: Mon, 24 Jan 2022 10:42:37 -0600 [thread overview]
Message-ID: <CAL_JsqLiw42zfaRPmszs2bmGbAcL5STSTVUtP0PyWnm=CaG8ug@mail.gmail.com> (raw)
In-Reply-To: <931fab73-3a91-fda0-4af3-b48a1ad3c742@tronnes.org>
On Mon, Jan 24, 2022 at 10:28 AM Noralf Trønnes <noralf@tronnes.org> wrote:
>
>
>
> Den 24.01.2022 17.08, skrev Rob Herring:
> > On Sun, Jan 23, 2022 at 11:25 AM Noralf Trønnes <noralf@tronnes.org> wrote:
> >>
> >> Add binding for MIPI DBI compatible SPI panels.
> >
> > I'm sure we already have MIPI DBI panels. What's this for?
> >
>
> It aims to use one driver to cover all MIPI DBI panels where the
> controller setup is loaded from userspace in a firmware file.
What's the solution when the user wants a splash screen in the
bootloader and also wants multiple panels supported?
Also, 1 driver doesn't dictate 1 compatible. A one to many
relationship is fine and makes the decision entirely the OS's.
> The cover
> letter points to the discussion where Maxime proposed this:
>
> https://lore.kernel.org/dri-devel/20211129093946.xhp22mvdut3m67sc@houat/
The proposal there is:
> compatible = "panel-spi";
> model = "panel-from-random-place-42";
The same thing can be accomplished with this:
compatible = "panel-from-random-place-42", "panel-spi";
What's the advantage of hijacking 'model'?
Rob
next prev parent reply other threads:[~2022-01-24 16:42 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-23 17:25 [PATCH 0/3] drm/panel: Add MIPI DBI compatible SPI driver Noralf Trønnes
2022-01-23 17:25 ` [PATCH 1/3] dt-bindings: display: add bindings for MIPI DBI compatible SPI panels Noralf Trønnes
2022-01-24 16:01 ` Rob Herring
2022-01-24 16:08 ` Rob Herring
2022-01-24 16:28 ` Noralf Trønnes
2022-01-24 16:42 ` Rob Herring [this message]
2022-01-24 17:04 ` Noralf Trønnes
2022-01-27 9:36 ` Maxime Ripard
2022-01-27 20:18 ` Rob Herring
2022-01-23 17:25 ` [PATCH 2/3] drm/mipi-dbi: Add driver_private member to struct mipi_dbi_dev Noralf Trønnes
2022-01-23 17:25 ` [PATCH 3/3] drm/panel: Add MIPI DBI compatible SPI driver Noralf Trønnes
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