From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755784Ab3KVRQO (ORCPT ); Fri, 22 Nov 2013 12:16:14 -0500 Received: from cavan.codon.org.uk ([93.93.128.6]:49736 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755526Ab3KVRQM (ORCPT ); Fri, 22 Nov 2013 12:16:12 -0500 Date: Fri, 22 Nov 2013 17:15:56 +0000 From: Matthew Garrett To: Henrique de Moraes Holschuh Cc: Jingoo Han , "'Kyungmin Park'" , "'Henrique de Moraes Holschuh'" , linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, kay@vrfy.org, "'Richard Purdie'" , ibm-acpi-devel@lists.sourceforge.net, platform-driver-x86@vger.kernel.org Subject: Re: [PATCH] video: backlight: Remove backlight sysfs uevent Message-ID: <20131122171556.GA15680@srcf.ucam.org> References: <20131111235700.GA29987@july> <002901cedf3c$a7e77a00$f7b66e00$%han@samsung.com> <20131112005628.GA2914@khazad-dum.debian.net> <1384990859.20536.4.camel@x230> <20131121114332.GA23710@khazad-dum.debian.net> <20131121143326.GA19773@srcf.ucam.org> <20131122113601.GB27196@khazad-dum.debian.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131122113601.GB27196@khazad-dum.debian.net> User-Agent: Mutt/1.5.20 (2009-06-14) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: mjg59@cavan.codon.org.uk X-SA-Exim-Scanned: No (on cavan.codon.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 22, 2013 at 09:36:01AM -0200, Henrique de Moraes Holschuh wrote: > On Thu, 21 Nov 2013, Matthew Garrett wrote: > > The uevent support was initially added to handle systems where pressing > > a hotkey generates an event (good) but the firmware automatically > > changes the brightness (bad). I have absolutely no idea why I added > > BACKLIGHT_UPDATE_SYSFS - BACKLIGHT_UPDATE_HOTKEY solves the problem I > > was trying to solve. I'm not aware of any userspace that relies on > > BACKLIGHT_UPDATE_SYSFS. > > Well, either we have userspace that rely on the uevents, or we don't. We have userspace that relies on uevents of type BACKLIGHT_UPDATE_HOTKEY. I don't know that we have userspace that relies on uevents of type BACKLIGHT_UPDATE_SYSFS. -- Matthew Garrett | mjg59@srcf.ucam.org