From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Mark Brown <broonie@kernel.org>, Rob Herring <robh@kernel.org>,
Al Stone <ahs3@redhat.com>
Subject: Re: [RFC 00/15] ACPI graph support
Date: Thu, 6 Oct 2016 14:19:22 +0300 [thread overview]
Message-ID: <20161006111922.GI30800@lahna.fi.intel.com> (raw)
In-Reply-To: <20161006095739.GA22984@red-moon>
On Thu, Oct 06, 2016 at 10:57:39AM +0100, Lorenzo Pieralisi wrote:
> On Thu, Oct 06, 2016 at 12:11:33PM +0300, Mika Westerberg wrote:
> > On Thu, Oct 06, 2016 at 09:57:03AM +0100, Lorenzo Pieralisi wrote:
> > > I am trying to understand why x86 wants to do this, please understand
> > > our point of view too, we do not want to block progress we want to
> > > prevent a mess.
> >
> > One reason is that we have boards like Joule where developers are
> > allowed to connect different peripherals using buses such as I2C and SPI
> > where there is no native enumeration mechanism. This includes camera
> > sensors and related so there needs to be a way for a developer to
> > describe this in ACPI. Just as can be done when using ARM and DT.
>
> I am sorry I think we are at loggerheads on this. If you need a DT boot
> with a DT, I could have converted all the ACPI tables to DT nodes on
> ARM64 if I followed your reasoning (because we could not boot with ACPI
> till relatively recently), we did not do it because ACPI and DT are
> different specifications, incompatible with one another and governed by
> different entities in a *very* different way.
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.
> You are saying that just re-using leaf nodes properties (well, it
> is not just leaf-nodes properties any longer, is it ?) is just
> fine;
Yes.
Not sure where this remote-endpoint thing belongs, to be honest. It is
used inside V4L2 to determine which parts of the system make up a camera
device so in that sense it is "leaf-node" property but it is not limited
to just V4L2.
> I(We) am not convinced, time will tell. In the interim
> please notify the respective subsystems maintainers and DT people
> of this patch intentions, again I hope I am not asking too much.
I think Sakari already did that for V4L2. Next version will include all
the relevant mailing lists.
next prev parent reply other threads:[~2016-10-06 11:28 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 [this message]
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
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20161006111922.GI30800@lahna.fi.intel.com \
--to=mika.westerberg@linux.intel.com \
--cc=ahs3@redhat.com \
--cc=broonie@kernel.org \
--cc=linux-acpi@vger.kernel.org \
--cc=lorenzo.pieralisi@arm.com \
--cc=mark.rutland@arm.com \
--cc=rafael@kernel.org \
--cc=robh@kernel.org \
--cc=sakari.ailus@linux.intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.