On Mon, 9 May 2011 17:40:06 +0100, Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote :
> On Mon, May 09, 2011 at 08:59:01AM -0700, Andy Ross wrote:
> > On 05/09/2011 08:47 AM, Matthew Garrett wrote:
> > > Yes, so the accelerometer driver should (in-kernel) know that a coarse
> > > orientation event has occured and then send an appropriate uevent to
> > > userspace indiciating that it has new data.
> >
> > OK, so substituting udev for acpid, but otherwise leaving the
> > input-polldev device alone. That certainly sounds nice to me, though
> > I'm not sure where the "dreadful / don't do that" advice is directed
> > as the handling in userspace will be virtual identical (moving the
> > dbus-send from the acpid event file into a udev rule).
>
> It shouldn't even be a dbus send - something in userspace should just be
> listening for event notifications on the accelerometer. Use udev
> directly.
>
> > > I'm going to NAK anything that reports "Coarse orientation change"
> > > to userspace without providing any context.
> >
> > Just to be clear: there's no kernel code to NAK here. The acpid hook
> > is raw, and in userspace. It's not clean, but it's also a single-device
> > fixup: seems to me to be pretty much exactly what apcid is for, no?
>
> acpid is for dealing with cases where the kernel doesn't provide
> functionality that the kernel should provide. Arbitrary APCI events
> shouldn't be being delivered to userspace - they should be handled
> in-kernel and delivered through a meaningful mechanism in order to avoid
> cases where userspace needs to know about a platform implementation. In
> this case the right way for the event to hit userspace is as a generic
> message from the accelerometer, not as a device-specific ACPI event
> through a deprecated interface.
>
Implementation RFC :
From: Anisse Astier <anisse@xxxxxxxxx>
Date: Mon, 9 May 2011 19:51:40 +0200
Subject: [PATCH RFC] asus-laptop: pega_accel - Report accelerometer orientation change through udev
Signed-off-by: Anisse Astier <anisse@xxxxxxxxx>
---
drivers/platform/x86/asus-laptop.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index 2105b42..e23d555 100644
--- a/drivers/platform/x86/asus-laptop.c
+++ b/drivers/platform/x86/asus-laptop.c
@@ -1337,6 +1337,13 @@ static void asus_acpi_notify(struct acpi_device *device, u32 event)
}
return ;
}
+
+ /* Accelerometer "coarse orientation change" event */
+ if (asus->pega_accel && event == 0xEA) {
+ kobject_uevent(&asus->pega_accel->dev.kobj, KOBJ_CHANGE);
+ return ;
+ }
+
asus_input_notify(asus, event);
}
--
1.7.4.3
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