From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Donohue Subject: [PATCH v4 1/3] Input: ALPS - Fix TrackStick support for SS5 hardware Date: Tue, 8 Nov 2016 10:14:30 -0500 Message-ID: <20161108151430.GN2927@TopQuark.net> References: <20161024210122.GA2919@TopQuark.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from Lepton.TopQuark.net ([168.235.66.66]:60725 "EHLO Mail2.TopQuark.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751427AbcKHPOc (ORCPT ); Tue, 8 Nov 2016 10:14:32 -0500 Content-Disposition: inline In-Reply-To: <20161024210122.GA2919@TopQuark.net> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: linux-input@vger.kernel.org Cc: Ben Gamari , Pali =?iso-8859-1?Q?Roh=E1r?= , Michal Hocko The current Alps SS5 (SS4 v2) code generates bogus TouchPad events when TrackStick packets are processed. This causes the xorg synaptics driver to print "unable to find touch point 0" and "BUG: triggered 'if (priv->num_active_touches > priv->num_slots)'" messages. It also causes unexpected TouchPad button release and reclick event sequences if the TrackStick is moved while holding a TouchPad button. This commit corrects the problem by adjusting alps_process_packet_ss4_v2() so that it only sends TrackStick reports when processing TrackStick packets. Signed-off-by: Paul Donohue diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c index 6d7de9b..b93fe83 100644 --- a/drivers/input/mouse/alps.c +++ b/drivers/input/mouse/alps.c @@ -1346,6 +1346,18 @@ static void alps_process_packet_ss4_v2(struct psmouse *psmouse) priv->multi_packet = 0; + /* Report trackstick */ + if (alps_get_pkt_id_ss4_v2(packet) == SS4_PACKET_ID_STICK) { + if (priv->flags & ALPS_DUALPOINT) { + input_report_key(dev2, BTN_LEFT, f->ts_left); + input_report_key(dev2, BTN_RIGHT, f->ts_right); + input_report_key(dev2, BTN_MIDDLE, f->ts_middle); + input_sync(dev2); + } + return; + } + + /* Report touchpad */ alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4); input_mt_report_finger_count(dev, f->fingers); @@ -1356,13 +1368,6 @@ static void alps_process_packet_ss4_v2(struct psmouse *psmouse) input_report_abs(dev, ABS_PRESSURE, f->pressure); input_sync(dev); - - if (priv->flags & ALPS_DUALPOINT) { - input_report_key(dev2, BTN_LEFT, f->ts_left); - input_report_key(dev2, BTN_RIGHT, f->ts_right); - input_report_key(dev2, BTN_MIDDLE, f->ts_middle); - input_sync(dev2); - } } static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)