From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 456D7C433DF for ; Sun, 7 Jun 2020 20:24:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C09A2067B for ; Sun, 7 Jun 2020 20:24:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726872AbgFGUYS (ORCPT ); Sun, 7 Jun 2020 16:24:18 -0400 Received: from jabberwock.ucw.cz ([46.255.230.98]:53638 "EHLO jabberwock.ucw.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726093AbgFGUYS (ORCPT ); Sun, 7 Jun 2020 16:24:18 -0400 Received: by jabberwock.ucw.cz (Postfix, from userid 1017) id 44C241C0BD2; Sun, 7 Jun 2020 22:24:15 +0200 (CEST) Date: Sun, 7 Jun 2020 22:24:14 +0200 From: Pavel Machek To: Andrzej Pietrasiewicz 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, linux-samsung-soc@vger.kernel.org, linux-input@vger.kernel.org, linux-tegra@vger.kernel.org, patches@opensource.cirrus.com, ibm-acpi-devel@lists.sourceforge.net, platform-driver-x86@vger.kernel.org, "Rafael J . Wysocki" , Len Brown , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Kukjin Kim , Krzysztof Kozlowski , Dmitry Torokhov , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Vladimir Zapolskiy , Sylvain Lemieux , Laxman Dewangan , Thierry Reding , Jonathan Hunter , Barry Song , Michael Hennerich , Nick Dyer , Hans de Goede , Ferruh Yigit , Sangwon Jee , Peter Hutterer , Henrique de Moraes Holschuh , kernel@collabora.com Subject: Re: [PATCH v3 0/7] Support inhibiting input devices Message-ID: <20200607202414.GB13138@amd> References: <20200604072853.GP89269@dtor-ws> <20200605173335.13753-1-andrzej.p@collabora.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="E39vaYmALEf/7YXx" Content-Disposition: inline In-Reply-To: <20200605173335.13753-1-andrzej.p@collabora.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org --E39vaYmALEf/7YXx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri 2020-06-05 19:33:28, Andrzej Pietrasiewicz wrote: > Userspace might want to implement a policy to temporarily disregard input > from certain devices. Wow, you certainly cc a lot of lists. > An example use case is a convertible laptop, whose keyboard can be folded > under the screen to create tablet-like experience. The user then must hold > the laptop in such a way that it is difficult to avoid pressing the keybo= ard > keys. It is therefore desirable to temporarily disregard input from the > keyboard, until it is folded back. This obviously is a policy which should > be kept out of the kernel, but the kernel must provide suitable means to > implement such a policy. >=20 > Due to interactions with suspend/resume, a helper has been added for driv= ers > to decide if the device is being used or not (PATCH 1/7) and it has been > applied to relevant drivers (PATCH 2,4,5,6/7). But is that a right way to implement it? We want this for cellphones, too -- touchscreen should be disabled while the device is locked in the pocket -- but we really want the touchscreen hardware to be powered down in that case (because it keeps SoC busy and eats a _lot_ of electricity). But simplistic "receive an event and then drop it if device is inhibited" does not allow that... Best regards, Pavel =09 --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --E39vaYmALEf/7YXx Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAl7dTO4ACgkQMOfwapXb+vKNuACgw3cpx7Z15Nm3EAs8yyTuu1RS DsYAn1yorcZKMbA2oKpOoVakbRalRIie =Dt1J -----END PGP SIGNATURE----- --E39vaYmALEf/7YXx--