From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:57270 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752612AbeDJJFT (ORCPT ); Tue, 10 Apr 2018 05:05:19 -0400 Subject: Patch "Input: elantech - force relative mode on a certain module" has been added to the 4.4-stable tree To: kt.liao@emc.com.tw, alexander.levin@microsoft.com, dmitry.torokhov@gmail.com, gregkh@linuxfoundation.org Cc: , From: Date: Tue, 10 Apr 2018 11:04:11 +0200 Message-ID: <1523351051184195@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled Input: elantech - force relative mode on a certain module to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: input-elantech-force-relative-mode-on-a-certain-module.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Tue Apr 10 10:31:53 CEST 2018 From: KT Liao Date: Mon, 12 Dec 2016 11:03:42 -0800 Subject: Input: elantech - force relative mode on a certain module From: KT Liao [ Upstream commit d899520b0431e70279bfb5066ecb6dc91d0b7072 ] One of Elan modules with sample version is 0x74 and hw_version is 0x03 has a bug in absolute mode implementation, so let it run in default PS/2 relative mode. Signed-off-by: KT Liao Signed-off-by: Dmitry Torokhov Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/input/mouse/elantech.c | 11 +++++++++++ 1 file changed, 11 insertions(+) --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -1715,6 +1715,17 @@ int elantech_init(struct psmouse *psmous etd->samples[0], etd->samples[1], etd->samples[2]); } + if (etd->samples[1] == 0x74 && etd->hw_version == 0x03) { + /* + * This module has a bug which makes absolute mode + * unusable, so let's abort so we'll be using standard + * PS/2 protocol. + */ + psmouse_info(psmouse, + "absolute mode broken, forcing standard PS/2 protocol\n"); + goto init_fail; + } + if (elantech_set_absolute_mode(psmouse)) { psmouse_err(psmouse, "failed to put touchpad into absolute mode.\n"); Patches currently in stable-queue which might be from kt.liao@emc.com.tw are queue-4.4/input-elantech-force-relative-mode-on-a-certain-module.patch queue-4.4/input-elan_i2c-clear-int-before-resetting-controller.patch