From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35465 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992797AbbHHVGo (ORCPT ); Sat, 8 Aug 2015 17:06:44 -0400 Subject: Patch "Input: usbtouchscreen - avoid unresponsive TSC-30 touch screen" has been added to the 4.1-stable tree To: bernhard.bender@bytecmed.com, dmitry.torokhov@gmail.com, gregkh@linuxfoundation.org, jakob.mustafa@bytecmed.com Cc: , From: Date: Sat, 08 Aug 2015 14:06:43 -0700 Message-ID: <1439068003228166@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: usbtouchscreen - avoid unresponsive TSC-30 touch screen to the 4.1-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-usbtouchscreen-avoid-unresponsive-tsc-30-touch-screen.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 968491709e5b1aaf429428814fff3d932fa90b60 Mon Sep 17 00:00:00 2001 From: Bernhard Bender Date: Thu, 23 Jul 2015 13:58:08 -0700 Subject: Input: usbtouchscreen - avoid unresponsive TSC-30 touch screen From: Bernhard Bender commit 968491709e5b1aaf429428814fff3d932fa90b60 upstream. This patch fixes a problem in the usbtouchscreen driver for DMC TSC-30 touch screen. Due to a missing delay between the RESET and SET_RATE commands, the touch screen may become unresponsive during system startup or driver loading. According to the DMC documentation, a delay is needed after the RESET command to allow the chip to complete its internal initialization. As this delay is not guaranteed, we had a system where the touch screen occasionally did not send any touch data. There was no other indication of the problem. The patch fixes the problem by adding a 150ms delay between the RESET and SET_RATE commands. Suggested-by: Jakob Mustafa Signed-off-by: Bernhard Bender Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- drivers/input/touchscreen/usbtouchscreen.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/input/touchscreen/usbtouchscreen.c +++ b/drivers/input/touchscreen/usbtouchscreen.c @@ -627,6 +627,9 @@ static int dmc_tsc10_init(struct usbtouc goto err_out; } + /* TSC-25 data sheet specifies a delay after the RESET command */ + msleep(150); + /* set coordinate output rate */ buf[0] = buf[1] = 0xFF; ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), Patches currently in stable-queue which might be from bernhard.bender@bytecmed.com are queue-4.1/input-usbtouchscreen-avoid-unresponsive-tsc-30-touch-screen.patch