From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Cc: linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
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linux-tegra@vger.kernel.org, patches@opensource.cirrus.com,
ibm-acpi-devel@lists.sourceforge.net,
platform-driver-x86@vger.kernel.org,
"Rafael J . Wysocki" <rjw@rjwysocki.net>,
Len Brown <lenb@kernel.org>, Jonathan Cameron <jic23@kernel.org>,
Hartmut Knaack <knaack.h@gmx.de>,
Lars-Peter Clausen <lars@metafoo.de>,
Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
Kukjin Kim <kgene@kernel.org>,
Krzysztof Kozlowski <krzk@kernel.org>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
Vladimir Zapolskiy <vz@mleia.com>,
Sylvain Lemieux <slemieux.tyco@gmail.com>,
Laxman Dewangan <ldewangan@nvidia.com>,
Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Barry Song <baohua@kernel.org>,
Michael Hennerich <michael.hennerich@analog.com>,
Nick Dyer <nick@shmanahar.org>,
Hans de Goede <hdegoede@redhat.com>,
Ferruh Yigit <fery@cypress.com>, Sangwon Jee <jeesw@melfas.com>,
Peter Hutterer <peter.hutterer@redhat.com>,
Henrique de Moraes Holschuh <ibm-acpi@hmh.eng.br>,
kernel@collabora.com, Patrik Fimml <patrikf@chromium.org>
Subject: Re: [PATCH v4 7/7] Input: Add "inhibited" property
Date: Tue, 6 Oct 2020 18:12:49 -0700 [thread overview]
Message-ID: <20201007011249.GS1009802@dtor-ws> (raw)
In-Reply-To: <20201007011102.GR1009802@dtor-ws>
On Tue, Oct 06, 2020 at 06:11:02PM -0700, Dmitry Torokhov wrote:
> On Tue, Oct 06, 2020 at 03:04:28PM +0200, Andrzej Pietrasiewicz wrote:
> > Hi Dmitry,
> >
> > W dniu 05.10.2020 o 20:10, Dmitry Torokhov pisze:
> > > Hi Andrzej,
> > >
> > > On Mon, Jun 08, 2020 at 01:22:11PM +0200, Andrzej Pietrasiewicz wrote:
> > > > @@ -284,8 +284,11 @@ static int input_get_disposition(struct input_dev *dev,
> > > > case EV_KEY:
> > > > if (is_event_supported(code, dev->keybit, KEY_MAX)) {
> > > > - /* auto-repeat bypasses state updates */
> > > > - if (value == 2) {
> > > > + /*
> > > > + * auto-repeat bypasses state updates but repeat
> > > > + * events are ignored if the key is not pressed
> > > > + */
> > > > + if (value == 2 && test_bit(code, dev->key)) {
> > > > disposition = INPUT_PASS_TO_HANDLERS;
> > > > break;
> > > > }
> > >
> > > Is this chunk really part of inhibit support? I'd think we cancel
> > > autorepeat timer when we are releasing a key, no?
> > >
> >
> > When I look at it now it seems to me the chunk might be redundant.
> > But let me explain what I had in mind when adding it.
> >
> > It is a matter of what we do with input events generated while a
> > device is inhibited. If ->open()/->close() are not provided by the
> > driver then inhibiting amounts to merely ignoring input events from
> > a device while it remains active. What else can you do if the driver
> > does not provide a method to prepare the device for generating events/
> > to stop generating events?
> >
> > In this special case a user might trigger a repeated event while the
> > device is inhibited, then the user keeps holding the key down and the
> > device is uninhibited. Do we pass anything to handlers then?
> >
> > In my opinion we should not. Such an event is "illegal" in a sense that it
> > was generated at a time when nobody wanted any events from the device.
> > Hence the test to let only those auto-repeat events through for which
> > a key is actually pressed.
> >
> > However, what I see now is that if a device is inhibited, no key
> > will ever reach neither the "1" nor "2" state because of the "if"
> > in the very beginning of input_handle_event().
>
> OK, then let's drop it for now. We can revisit if we see that a problem.
And by that I mean that I will drop it myself, no need to resend. I will
be applying this shortly.
Thanks.
--
Dmitry
next prev parent reply other threads:[~2020-10-07 1:12 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200506002746.GB89269@dtor-ws>
2020-05-15 16:49 ` [PATCHv2 0/7] Support inhibiting input devices Andrzej Pietrasiewicz
[not found] ` <20200515164943.28480-1-andrzej.p-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
2020-05-15 16:51 ` [PATCHv2 1/7] Input: add input_device_enabled() Andrzej Pietrasiewicz
2020-05-15 16:51 ` [PATCHv2 2/7] Input: use input_device_enabled() Andrzej Pietrasiewicz
2020-05-15 16:52 ` [PATCHv2 6/7] Input: Add "inhibited" property Andrzej Pietrasiewicz
2020-05-15 18:19 ` [PATCHv2 0/7] Support inhibiting input devices Hans de Goede
[not found] ` <842b95bb-8391-5806-fe65-be64b02de122-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2020-05-17 22:55 ` Peter Hutterer
2020-05-18 2:40 ` Dmitry Torokhov
2020-05-18 7:36 ` Hans de Goede
2020-05-22 15:35 ` Andrzej Pietrasiewicz
2020-05-27 6:13 ` Peter Hutterer
2020-05-18 10:48 ` Andrzej Pietrasiewicz
[not found] ` <e6030957-97dc-5b04-7855-bc14a78164c8-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
2020-05-18 12:24 ` Hans de Goede
2020-05-18 13:49 ` Andrzej Pietrasiewicz
2020-05-18 14:23 ` Hans de Goede
2020-05-19 9:02 ` Andrzej Pietrasiewicz
2020-05-19 9:36 ` Hans de Goede
[not found] ` <aa2ce2ab-e5bc-9cb4-8b53-c1ef9348b646-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2020-05-27 6:34 ` Dmitry Torokhov
2020-06-02 16:56 ` Andrzej Pietrasiewicz
2020-06-02 17:52 ` Dmitry Torokhov
2020-06-02 18:50 ` Andrzej Pietrasiewicz
2020-06-02 20:19 ` Hans de Goede
[not found] ` <8f97d2e1-497a-495d-bc82-f46dbeba440c-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2020-06-03 13:07 ` Andrzej Pietrasiewicz
2020-06-03 17:38 ` Hans de Goede
2020-06-03 17:54 ` Andrzej Pietrasiewicz
2020-06-03 19:37 ` Hans de Goede
2020-06-04 7:28 ` Dmitry Torokhov
2020-06-05 17:33 ` [PATCH v3 " Andrzej Pietrasiewicz
2020-06-05 17:33 ` [PATCH v3 3/7] ACPI: button: Access input device's users under appropriate mutex Andrzej Pietrasiewicz
2020-06-05 17:33 ` [PATCH v3 5/7] iio: adc: exynos: Use input_device_enabled() Andrzej Pietrasiewicz
[not found] ` <20200605173335.13753-6-andrzej.p-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
2020-06-05 19:49 ` Michał Mirosław
[not found] ` <20200605173335.13753-1-andrzej.p-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
2020-06-05 17:33 ` [PATCH v3 1/7] Input: add input_device_enabled() Andrzej Pietrasiewicz
2020-06-05 17:33 ` [PATCH v3 2/7] Input: use input_device_enabled() Andrzej Pietrasiewicz
2020-06-05 17:33 ` [PATCH v3 4/7] ACPI: button: Use input_device_enabled() helper Andrzej Pietrasiewicz
2020-06-05 17:33 ` [PATCH v3 6/7] platform/x86: thinkpad_acpi: Use input_device_enabled() Andrzej Pietrasiewicz
2020-06-07 20:24 ` [PATCH v3 0/7] Support inhibiting input devices Pavel Machek
2020-06-08 5:37 ` Dmitry Torokhov
2020-06-08 9:28 ` Andrzej Pietrasiewicz
2020-06-05 17:33 ` [PATCH v3 7/7] Input: Add "inhibited" property Andrzej Pietrasiewicz
2020-06-05 17:41 ` Hans de Goede
[not found] ` <2336e15d-ff4b-bbb6-c701-dbf3aa110fcd-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2020-06-08 11:22 ` [PATCH v4 0/7] Support inhibiting input devices Andrzej Pietrasiewicz
2020-06-08 11:22 ` [PATCH v4 1/7] Input: add input_device_enabled() Andrzej Pietrasiewicz
2020-12-03 6:25 ` Dmitry Torokhov
2020-06-08 11:22 ` [PATCH v4 2/7] Input: use input_device_enabled() Andrzej Pietrasiewicz
2020-12-03 6:26 ` Dmitry Torokhov
[not found] ` <CGME20201207133237eucas1p26f8484944760a14e51dc7353ed33cd28@eucas1p2.samsung.com>
2020-12-07 13:32 ` Marek Szyprowski
2020-12-07 15:50 ` Andrzej Pietrasiewicz
2020-12-08 10:05 ` Marek Szyprowski
2020-12-09 6:37 ` Dmitry Torokhov
2020-12-11 7:09 ` [PATCH] Input: cyapa - do not call input_device_enabled from power mode handler Dmitry Torokhov
2020-12-11 8:22 ` Marek Szyprowski
2020-12-11 8:31 ` Dmitry Torokhov
2020-06-08 11:22 ` [PATCH v4 3/7] ACPI: button: Access input device's users under appropriate mutex Andrzej Pietrasiewicz
2020-06-24 15:00 ` Rafael J. Wysocki
2020-06-25 5:23 ` Dmitry Torokhov
2020-06-25 10:55 ` Rafael J. Wysocki
2020-10-05 5:08 ` Dmitry Torokhov
2020-06-08 11:22 ` [PATCH v4 4/7] ACPI: button: Use input_device_enabled() helper Andrzej Pietrasiewicz
2020-06-25 5:24 ` Dmitry Torokhov
2020-10-05 5:06 ` Dmitry Torokhov
2020-06-08 11:22 ` [PATCH v4 5/7] iio: adc: exynos: Use input_device_enabled() Andrzej Pietrasiewicz
[not found] ` <20200608112211.12125-6-andrzej.p-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
2020-06-10 1:28 ` Michał Mirosław
2020-06-10 7:52 ` [FIXED PATCH " Andrzej Pietrasiewicz
2020-06-08 11:22 ` [PATCH v4 6/7] platform/x86: thinkpad_acpi: " Andrzej Pietrasiewicz
2020-06-08 11:22 ` [PATCH v4 7/7] Input: Add "inhibited" property Andrzej Pietrasiewicz
2020-10-05 18:10 ` Dmitry Torokhov
2020-10-06 13:04 ` Andrzej Pietrasiewicz
2020-10-07 1:11 ` Dmitry Torokhov
2020-10-07 1:12 ` Dmitry Torokhov [this message]
2020-12-03 6:26 ` Dmitry Torokhov
[not found] ` <20200608112211.12125-1-andrzej.p-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
2020-06-10 9:49 ` [PATCH v4 0/7] Support inhibiting input devices Hans de Goede
2020-06-10 10:38 ` Rafael J. Wysocki
[not found] ` <CAJZ5v0hB2ra2K=dd9ZjVyy1V2b1PmFHm79uDO2HtHU1D_4YUbw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-06-10 13:12 ` Andrzej Pietrasiewicz
2020-06-10 13:21 ` Hans de Goede
2020-06-10 13:41 ` Andrzej Pietrasiewicz
[not found] ` <2d5fd063-66bc-c707-4041-84a17c0a7d04-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
2020-06-12 8:30 ` Hans de Goede
2020-06-12 8:47 ` Andrzej Pietrasiewicz
2020-06-16 17:29 ` [PATCH] Input: document inhibiting Andrzej Pietrasiewicz
2020-06-16 17:38 ` Randy Dunlap
[not found] ` <20200616172909.21625-1-andrzej.p-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
2020-06-17 7:44 ` Hans de Goede
[not found] ` <f9007f37-c526-5fa4-3188-a554d2434177-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2020-06-17 10:18 ` [PATCH v2] " Andrzej Pietrasiewicz
[not found] ` <20200617101822.8558-1-andrzej.p-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
2020-06-17 10:21 ` Hans de Goede
2020-06-17 16:52 ` Randy Dunlap
2020-06-23 13:35 ` Pavel Machek
2020-12-03 6:27 ` Dmitry Torokhov
[not found] ` <3e61c9c1-b211-da9f-c55b-b44eb6522f2a-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2020-06-10 14:01 ` [PATCH v4 0/7] Support inhibiting input devices Rafael J. Wysocki
2020-06-10 13:52 ` Hans de Goede
2020-06-10 18:28 ` Dmitry Torokhov
2020-06-12 8:14 ` Hans de Goede
2020-06-12 8:17 ` Hans de Goede
2020-08-03 14:40 ` Andrzej Pietrasiewicz
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