From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Mark Rutland <mark.rutland@arm.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Mark Brown <broonie@kernel.org>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Rob Herring <robh@kernel.org>, Al Stone <ahs3@redhat.com>
Subject: Re: [RFC 00/15] ACPI graph support
Date: Wed, 12 Oct 2016 02:19:12 +0200 [thread overview]
Message-ID: <23443005.JZJ5hoblVr@vostro.rjw.lan> (raw)
In-Reply-To: <20161011124420.GD24347@remoulade>
On Tuesday, October 11, 2016 01:44:20 PM Mark Rutland wrote:
> On Thu, Oct 06, 2016 at 06:00:39PM +0200, Rafael J. Wysocki wrote:
> > On Thu, Oct 6, 2016 at 5:31 PM, Mark Brown <broonie@kernel.org> wrote:
> > > On Thu, Oct 06, 2016 at 02:19:22PM +0300, Mika Westerberg wrote:
> > >
> > >> I don't need a DT, I need that my existing firmware (in this case BIOS)
> > >> can describe camera device(s) and the OS can take advantage of this,
> > >> preferably with minimal changes to the drivers.
> > >
> > >> Currently there is no way in ACPI specification to do that.
> > >
> > > That's not exactly true - the way Windows handles audio devices (which
> > > follow a similar pattern) is to register the control interfaces of the
> > > individual components of the system using existing bindings and then
> > > bind them together with a driver that matches the board level
> > > identification. This isn't super awesome but it's definitely a thing
> > > you can do.
>
> ... so at least one OS *already* has an OS-specific bodge around what is a
> clear ACPI deficiency...
>
> > But that would mean writing new Linux code to support hardware that
> > already is supported by the Linux kernel.
> >
> > That would be a bit like saying "We have a driver for this, but you
> > are not allowed to use it, because your platform is not a DT one".
> > That doesn't sound good to me, honestly.
>
> ... and none of us like any of the proposed OS-specific bodges.
I'm taking this as your personal opinion.
> So why is no-one trying to solve the issue? Why has this not been raised as an
> issue to be solved by the ACPI spec?
How exactly do you think it could be solved there?
Thanks,
Rafael
next prev parent reply other threads:[~2016-10-12 0:13 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-04 22:45 [RFC 00/15] ACPI graph support Sakari Ailus
2016-10-04 22:45 ` [RFC 01/15] ACPI / property: Add possiblity to retrieve parent firmware node Sakari Ailus
2016-10-04 22:45 ` [RFC 02/15] device property: Add fwnode_get_parent() Sakari Ailus
2016-10-04 22:45 ` [RFC 03/15] ACPI / property: Add fwnode_get_next_child_node() Sakari Ailus
2016-10-04 22:45 ` [RFC 04/15] device property: Add fwnode_get_named_child_node() Sakari Ailus
2016-10-04 22:45 ` [RFC 05/15] ACPI / property: Add support for remote endpoints Sakari Ailus
2016-10-04 22:45 ` [RFC 06/15] device " Sakari Ailus
2016-10-04 22:45 ` [RFC 07/15] device property: Add fwnode_handle_get() Sakari Ailus
2016-10-04 22:45 ` [RFC 08/15] of: Add of_fwnode_handle() to convert device nodes to fwnode_handle Sakari Ailus
2016-10-04 22:45 ` [RFC 09/15] driver core: Arrange headers alphabetically Sakari Ailus
2016-10-04 22:45 ` [RFC 10/15] of: No need to include property.h, fwnode.h is sufficient Sakari Ailus
2016-10-04 22:45 ` [RFC 11/15] device property: Obtain device's fwnode independently of FW type Sakari Ailus
2016-10-04 22:45 ` [RFC 12/15] device property: Add support for fwnode endpoints Sakari Ailus
2016-10-04 22:45 ` [RFC 13/15] of: Add nop implementation of of_get_next_parent() Sakari Ailus
2016-10-04 22:45 ` [RFC 14/15] device property: Add fwnode_get_next_parent() Sakari Ailus
2016-10-04 22:45 ` [RFC 15/15] ACPI / DSD: Document references, ports and endpoints Sakari Ailus
2016-10-05 9:22 ` [RFC 00/15] ACPI graph support Lorenzo Pieralisi
2016-10-05 11:41 ` Mika Westerberg
2016-10-05 15:06 ` Lorenzo Pieralisi
2016-10-05 15:32 ` Mika Westerberg
2016-10-05 16:18 ` Lorenzo Pieralisi
2016-10-05 20:33 ` Rafael J. Wysocki
2016-10-06 8:57 ` Lorenzo Pieralisi
2016-10-06 9:11 ` Mika Westerberg
2016-10-06 9:57 ` Lorenzo Pieralisi
2016-10-06 11:19 ` Mika Westerberg
2016-10-06 15:31 ` Mark Brown
2016-10-06 16:00 ` Rafael J. Wysocki
2016-10-06 16:14 ` Mark Brown
2016-10-06 17:02 ` Rafael J. Wysocki
2016-10-11 12:44 ` Mark Rutland
2016-10-12 0:19 ` Rafael J. Wysocki [this message]
2016-10-06 12:30 ` Rafael J. Wysocki
2016-10-06 10:40 ` Mark Brown
2016-10-06 12:26 ` Mika Westerberg
2016-10-06 13:15 ` Rafael J. Wysocki
2016-10-06 15:23 ` Mark Brown
2016-10-06 15:56 ` Rafael J. Wysocki
2016-10-06 15:57 ` Sudeep Holla
2016-10-06 12:26 ` Rafael J. Wysocki
2016-10-06 21:37 ` Mark Brown
2016-10-10 23:44 ` Rafael J. Wysocki
2016-10-11 12:11 ` Rafael J. Wysocki
2016-10-11 13:05 ` Mark Brown
2016-10-11 12:44 ` Mark Brown
2016-10-11 13:32 ` Mark Rutland
2016-10-12 0:32 ` Rafael J. Wysocki
2016-10-12 12:05 ` Mark Brown
2016-10-12 12:26 ` Rafael J. Wysocki
2016-10-11 13:01 ` Mark Rutland
2016-10-11 13:26 ` Mark Brown
2016-10-11 12:56 ` Mark Rutland
2016-10-06 22:02 ` Sakari Ailus
2016-10-11 12:35 ` Mark Rutland
2016-10-12 9:00 ` Mika Westerberg
2016-10-12 10:28 ` Mark Brown
2016-10-12 11:12 ` Mika Westerberg
2016-10-12 11:25 ` Rafael J. Wysocki
2016-10-12 16:00 ` Mark Brown
2016-10-12 11:14 ` Rafael J. Wysocki
2016-10-12 12:32 ` Mark Brown
2016-10-12 12:42 ` Rafael J. Wysocki
2016-10-12 14:59 ` Mark Brown
2016-10-12 17:50 ` Rafael J. Wysocki
2016-10-06 21:58 ` Sakari Ailus
2016-10-05 15:21 ` Mark Brown
2016-10-05 15:30 ` Sudeep Holla
2016-10-05 18:14 ` Mika Westerberg
2016-10-05 20:18 ` Rafael J. Wysocki
2016-10-06 10:29 ` Sudeep Holla
2016-10-06 13:04 ` Rafael J. Wysocki
2016-10-06 14:20 ` Sudeep Holla
2016-10-06 17:05 ` Rafael J. Wysocki
2016-10-06 17:20 ` Sudeep Holla
2016-10-11 0:05 ` Rafael J. Wysocki
2016-10-11 8:57 ` Sudeep Holla
2016-10-11 11:59 ` Rafael J. Wysocki
2016-10-11 13:15 ` Mark Brown
2016-10-12 0:35 ` Rafael J. Wysocki
2016-10-06 17:20 ` Al Stone
2016-10-06 20:14 ` Mark Brown
2016-10-06 20:54 ` Al Stone
2016-10-11 12:28 ` Mark Rutland
2016-10-12 1:18 ` Rafael J. Wysocki
2016-10-06 21:10 ` Sakari Ailus
2016-10-11 13:30 ` Mark Rutland
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