From: <Mario.Limonciello@dell.com>
To: <pali@kernel.org>
Cc: <y.linux@paritcher.com>, <linux-kernel@vger.kernel.org>,
<platform-driver-x86@vger.kernel.org>, <mjg59@srcf.ucam.org>
Subject: RE: [PATCH 1/3] platform/x86: dell-wmi: add new backlight events
Date: Mon, 8 Jun 2020 20:38:09 +0000 [thread overview]
Message-ID: <d0bd94b5d27949f2beccb2ebbfbfa137@AUSX13MPC105.AMER.DELL.COM> (raw)
In-Reply-To: <20200608203618.dhpu6gsvigzdnecv@pali>
> -----Original Message-----
> From: Pali Rohár <pali@kernel.org>
> Sent: Monday, June 8, 2020 3:36 PM
> To: Limonciello, Mario
> Cc: y.linux@paritcher.com; linux-kernel@vger.kernel.org; platform-driver-
> x86@vger.kernel.org; mjg59@srcf.ucam.org
> Subject: Re: [PATCH 1/3] platform/x86: dell-wmi: add new backlight events
>
>
> [EXTERNAL EMAIL]
>
> On Monday 08 June 2020 20:14:15 Mario.Limonciello@dell.com wrote:
> > > >>> index c25a4286d766..0b4f72f923cd 100644
> > > >>> --- a/drivers/platform/x86/dell-wmi.c
> > > >>> +++ b/drivers/platform/x86/dell-wmi.c
> > > >>> @@ -252,6 +252,10 @@ static const struct key_entry
> > > >> dell_wmi_keymap_type_0010[] = {
> > > >>> /* Fn-lock switched to multimedia keys */
> > > >>> { KE_IGNORE, 0x1, { KEY_RESERVED } },
> > > >>>
> > > >>> + /* Backlight brightness level */
> > > >>> + { KE_KEY, 0x57, { KEY_BRIGHTNESSDOWN } },
> > > >>> + { KE_KEY, 0x58, { KEY_BRIGHTNESSUP } },
> > > >>> +
> > > >
> > > > For these particular events are they emitted by another interface as
> well
> > > in this
> > > > platform?
> > > >
> > > > If so they should be KE_IGNORE so you don't end up with double
> > > notifications to
> > > > userspace.
> > > Thank you both for the review,
> > > This is my first patch so if i am doing something wrong please let me
> know.
> > >
> > > Both before and after this change they are only emitted once (verified
> via
> > > showkeys)
> > > this is because `dell_wmi_process_key()` calls
> > > `acpi_video_handles_brightness_key_presses()`
> > > for brightness events, and
> `acpi_video_handles_brightness_key_presses()`
> > > makes sure no duplicate acpi-video events are sent.
> >
> > That's good to hear that it also filters it, but my opinion is that dell-
> wmi.c
> > should also filter it. So just change KE_KEY to KE_IGNORE like the other
> events.
>
> IIRC for other existing KEY_BRIGHTNESS* lines, KE_KEY/KE_IGNORE decision
> is there just because kernel can be configured if ACPI layer would
> handle them or not. And based on
> acpi_video_handles_brightness_key_presses()
> function we know if ACPI layer processed these keys or not.
>
> So in my opinion we should handle these new KEY_BRIGHTNESS* events in
> the same way. So dell-wmi should process these events, but only in case
> when ACPI layer did not processed them.
OK thanks, I wasn't aware of this decision elsewhere.
next prev parent reply other threads:[~2020-06-08 20:38 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-08 4:22 [PATCH 0/3] platform/x86: dell-wmi: new keys Y Paritcher
2020-06-08 4:22 ` [PATCH 1/3] platform/x86: dell-wmi: add new backlight events Y Paritcher
2020-06-08 8:35 ` Pali Rohár
2020-06-08 15:30 ` Mario.Limonciello
2020-06-08 20:11 ` Y Paritcher
2020-06-08 20:14 ` Mario.Limonciello
2020-06-08 20:36 ` Pali Rohár
2020-06-08 20:38 ` Mario.Limonciello [this message]
2020-06-08 4:22 ` [PATCH 2/3] platform/x86: dell-wmi: add new keymap type 0x0012 Y Paritcher
2020-06-08 8:50 ` Pali Rohár
2020-06-08 20:12 ` Y Paritcher
2020-06-08 15:40 ` Mario.Limonciello
2020-06-08 20:12 ` Y Paritcher
2020-06-08 20:30 ` Pali Rohár
2020-06-08 20:36 ` Mario.Limonciello
2020-06-08 21:03 ` Y Paritcher
2020-06-08 22:00 ` Mario.Limonciello
2020-06-08 22:53 ` Y Paritcher
2020-06-09 10:44 ` Hans de Goede
2020-06-09 15:36 ` Mario.Limonciello
2020-06-09 16:14 ` Hans de Goede
2020-06-09 19:41 ` Mario.Limonciello
2020-06-09 15:49 ` Pali Rohár
2020-06-09 16:45 ` Sebastian Reichel
2020-06-09 16:59 ` Hans de Goede
2020-06-19 15:31 ` Sebastian Reichel
2020-06-19 17:26 ` Mario.Limonciello
2020-06-09 8:04 ` Pali Rohár
2020-06-08 4:22 ` [PATCH 3/3] platform/x86: dell-wmi: add keys to bios_to_linux_keycode Y Paritcher
2020-06-08 6:36 ` kernel test robot
2020-06-08 7:36 ` kernel test robot
2020-06-08 9:00 ` Pali Rohár
2020-06-08 15:46 ` Mario.Limonciello
2020-06-08 20:12 ` Y Paritcher
2020-06-08 20:48 ` Pali Rohár
2020-06-08 20:58 ` Mario.Limonciello
2020-06-09 8:27 ` Pali Rohár
2020-06-08 23:05 ` [PATCH v2 0/3] platform/x86: dell-wmi: new keys Y Paritcher
2020-06-08 23:05 ` [PATCH v2 1/3] platform/x86: dell-wmi: add new backlight events Y Paritcher
2020-06-08 23:24 ` Pali Rohár
2020-06-08 23:05 ` [PATCH v2 2/3] platform/x86: dell-wmi: add new keymap type 0x0012 Y Paritcher
2020-06-08 23:33 ` Pali Rohár
2020-06-09 0:26 ` Mario.Limonciello
2020-06-09 0:57 ` Y Paritcher
2020-06-09 8:40 ` Pali Rohár
2020-06-09 8:50 ` Pali Rohár
2020-06-08 23:05 ` [PATCH v2 3/3] platform/x86: dell-wmi: add new dmi keys to bios_to_linux_keycode Y Paritcher
2020-06-08 23:27 ` Randy Dunlap
2020-06-08 23:55 ` Pali Rohár
2020-06-09 0:43 ` Y Paritcher
2020-06-09 8:35 ` Pali Rohár
2020-06-09 19:49 ` Mario.Limonciello
2020-06-10 9:44 ` Pali Rohár
2020-06-10 12:35 ` Mario.Limonciello
2020-06-12 14:14 ` Pali Rohár
2020-06-12 14:59 ` Mario.Limonciello
2020-06-09 3:52 ` [PATCH v3 0/3] platform/x86: dell-wmi: new keys Y Paritcher
2020-06-09 3:52 ` [PATCH v3 1/3] platform/x86: dell-wmi: add new backlight events Y Paritcher
2020-06-09 16:02 ` Mario.Limonciello
2020-06-09 3:52 ` [PATCH v3 2/3] platform/x86: dell-wmi: add new keymap type 0x0012 Y Paritcher
2020-06-09 3:52 ` [PATCH v3 3/3] platform/x86: dell-wmi: add new dmi mapping for keycode 0xffff Y Paritcher
2020-06-09 9:19 ` Pali Rohár
2020-06-10 17:56 ` [PATCH v4 0/3] platform/x86: dell-wmi: new keys Y Paritcher
2020-06-10 17:56 ` [PATCH v4 1/3] platform/x86: dell-wmi: add new backlight events Y Paritcher
2020-06-10 17:56 ` [PATCH v4 2/3] platform/x86: dell-wmi: add new keymap type 0x0012 Y Paritcher
2020-06-10 17:56 ` [PATCH v4 3/3] platform/x86: dell-wmi: add new dmi mapping for keycode 0xffff Y Paritcher
2020-06-10 19:22 ` [PATCH v4 0/3] platform/x86: dell-wmi: new keys Mario.Limonciello
2020-07-09 19:29 ` Andy Shevchenko
2020-07-13 7:29 ` Pali Rohár
2020-08-14 8:10 ` Pali Rohár
2020-06-12 14:09 ` Pali Rohár
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