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Sun, 8 Apr 2018 20:17:09 -0400 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Peter Hutterer , Dmitry Torokhov , Sasha Levin Subject: [PATCH AUTOSEL for 4.15 024/189] Input: synaptics - reset the ABS_X/Y fuzz after initializing MT axes Thread-Topic: [PATCH AUTOSEL for 4.15 024/189] Input: synaptics - reset the ABS_X/Y fuzz after initializing MT axes Thread-Index: AQHTz5gWA08neQ0NqEy9YpA+Lz1XFg== Date: Mon, 9 Apr 2018 00:17:04 +0000 Message-ID: <20180409001637.162453-24-alexander.levin@microsoft.com> References: <20180409001637.162453-1-alexander.levin@microsoft.com> In-Reply-To: <20180409001637.162453-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB1127;7:T3t1LIVxt4ogQvEYnjPkM2GvVph7zEH24o7HxPg9dig8nuHJgAc7rgPEa7baN2Aa9e25kDRoljkNQr+82oe9lbaq6zDMA2gn9mHj1bPh59XM6cukLlBgsEXEJ2qRlDjx/V/hI/OB5xiWVtE2atdvCLLVk2J3/WDzMUWEGnnBhxsoYoxfGgVP9zA2bRWl8rFUIYFfnIQ/7I2XYaswLXNF/4MbYHhTevERlz6CgSLuTkbN6g43ojmfR94/Nxt+rwZC;20:uxvYFHODfCs/pk2ZVdgjXCSMiD7vofqwdJU5diYxT1Lrq+wRC5EQPvmldBTXgcnFwCL4JNjPsZq5pO00Gy7OOYHlErlmiel516uZlI5uaHjoBUPFSpGHwGdfzRRAc2niN0ArgvgNcPpJsElZKWh+GA+DagNaVwi8id1hFTrAtZY= x-ms-exchange-antispam-srfa-diagnostics: SOS; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 84be3156-8d21-46d5-4b6e-08d59daf3957 X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Apr 2018 00:17:04.8247 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB1127 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Peter Hutterer [ Upstream commit 19eb4ed1141bd1096b9bc84ba9c4d03d5830c143 ] input_mt_init_slots() resets the ABS_X/Y fuzz to 0 and expects the driver to call input_mt_report_pointer_emulation(). That is based on the MT position bits which are already defuzzed - hence a fuzz of 0. In the case of synaptics semi-mt devices, we report the ABS_X/Y axes manually. This results in the MT position being defuzzed but the single-touch emulation missing that defuzzing. Work around this by re-initializing the ABS_X/Y axes after the MT axis to get the same fuzz value back. https://bugs.freedesktop.org/show_bug.cgi?id=3D104533 Signed-off-by: Peter Hutterer Signed-off-by: Dmitry Torokhov Signed-off-by: Sasha Levin --- drivers/input/mouse/synaptics.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptic= s.c index ee5466a374bf..a246fc686bb7 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -1280,6 +1280,16 @@ static void set_input_params(struct psmouse *psmouse= , INPUT_MT_POINTER | (cr48_profile_sensor ? INPUT_MT_TRACK : INPUT_MT_SEMI_MT)); + + /* + * For semi-mt devices we send ABS_X/Y ourselves instead of + * input_mt_report_pointer_emulation. But + * input_mt_init_slots() resets the fuzz to 0, leading to a + * filtered ABS_MT_POSITION_X but an unfiltered ABS_X + * position. Let's re-initialize ABS_X/Y here. + */ + if (!cr48_profile_sensor) + set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); } =20 if (SYN_CAP_PALMDETECT(info->capabilities)) --=20 2.15.1