From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753682Ab1F2FJ4 (ORCPT ); Wed, 29 Jun 2011 01:09:56 -0400 Received: from smtp-out.google.com ([216.239.44.51]:32811 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752083Ab1F2FII (ORCPT ); Wed, 29 Jun 2011 01:08:08 -0400 From: djkurtz@chromium.org To: dmitry.torokhov@gmail.com, rydberg@euromail.se, chase.douglas@canonical.com, rubini@cvml.unipv.it Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, derek.foreman@collabora.co.uk, daniel.stone@collabora.co.uk, olofj@chromium.org, Daniel Kurtz Subject: [PATCH 06/12] Input: synaptics - fuzz position if touchpad reports reduced filtering Date: Wed, 29 Jun 2011 13:07:16 +0800 Message-Id: <1309324042-22943-7-git-send-email-djkurtz@chromium.org> X-Mailer: git-send-email 1.7.3.1 In-Reply-To: <1309324042-22943-1-git-send-email-djkurtz@chromium.org> References: <1309324042-22943-1-git-send-email-djkurtz@chromium.org> X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Daniel Kurtz Synaptics touchpads indicate via a capability bit when they perform reduced filtering on position data. In such a case, use a non-zero fuzz value. Fuzz = 8 was chosen empirically by observing the raw position data reported by a clickpad indicating it had reduced filtering. Signed-off-by: Daniel Kurtz --- drivers/input/mouse/synaptics.c | 17 ++++++++++------- drivers/input/mouse/synaptics.h | 3 +++ 2 files changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 74b1222..dc54675 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -687,23 +687,27 @@ static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse) static void set_input_params(struct input_dev *dev, struct synaptics_data *priv) { int i; + int fuzz = 0; __set_bit(INPUT_PROP_POINTER, dev->propbit); + if (SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c)) + fuzz = SYN_REDUCED_FILTER_FUZZ; + __set_bit(EV_ABS, dev->evbit); - input_set_abs_params(dev, ABS_X, - XMIN_NOMINAL, priv->x_max ?: XMAX_NOMINAL, 0, 0); - input_set_abs_params(dev, ABS_Y, - YMIN_NOMINAL, priv->y_max ?: YMAX_NOMINAL, 0, 0); + input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, + priv->x_max ?: XMAX_NOMINAL, fuzz, 0); + input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, + priv->y_max ?: YMAX_NOMINAL, fuzz, 0); input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) { __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); input_mt_init_slots(dev, 2); input_set_abs_params(dev, ABS_MT_POSITION_X, XMIN_NOMINAL, - priv->x_max ?: XMAX_NOMINAL, 0, 0); + priv->x_max ?: XMAX_NOMINAL, fuzz, 0); input_set_abs_params(dev, ABS_MT_POSITION_Y, YMIN_NOMINAL, - priv->y_max ?: YMAX_NOMINAL, 0, 0); + priv->y_max ?: YMAX_NOMINAL, fuzz, 0); input_abs_set_res(dev, ABS_MT_POSITION_X, priv->x_res); input_abs_set_res(dev, ABS_MT_POSITION_Y, priv->y_res); @@ -977,4 +981,3 @@ bool synaptics_supported(void) } #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ - diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h index 34bedde..8a68e66 100644 --- a/drivers/input/mouse/synaptics.h +++ b/drivers/input/mouse/synaptics.h @@ -110,6 +110,9 @@ #define SYN_NEWABS_RELAXED 2 #define SYN_OLDABS 3 +/* amount to fuzz position data when touchpad reports reduced filtering */ +#define SYN_REDUCED_FILTER_FUZZ 8 + /* * A structure to describe the state of the touchpad hardware (buttons and pad) */ -- 1.7.3.1