From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mario Limonciello Subject: Re: [PATCH] Add a quirk for the Dell XPS 13 (2015) when in PS/2 mode. Date: Fri, 10 Apr 2015 18:07:03 -0500 Message-ID: <55285797.1080303@dell.com> References: <1424310180-2512-1-git-send-email-mario_limonciello@dell.com> <54EE1917.4020805@dell.com> <201502252145.22577@pali> <201504110039.40761@pali> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from ausc60pc101.us.dell.com ([143.166.85.206]:18067 "EHLO ausc60pc101.us.dell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932193AbbDJXHF (ORCPT ); Fri, 10 Apr 2015 19:07:05 -0400 In-Reply-To: <201504110039.40761@pali> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: =?UTF-8?B?UGFsaSBSb2jDoXI=?= Cc: LKML , "linux-input@vger.kernel.org" On 04/10/2015 05:39 PM, Pali Roh=C3=A1r wrote: > On Wednesday 25 February 2015 21:45:22 Pali Roh=C3=A1r wrote: > Hello Mario, > have you patched synaptics driver with some resetafter parameter? > And have some team in dell found reason for invalid packets? > Hi Pali, The reason was found for the invalid packets in PS2 mode, but I can't g= o into the details about it publicly. I think it's better to not bother including my proposed solution, howev= er. The vector of users in PS2 mode should be very small now. Here's why: With no kernel command line options applied the touchpad will run in I2= C mode with the current kernel. The only reason that users were being = exposed to the PS2 mode was if they ran with the kernel command line op= tion acpi_osi=3D"!Windows 2013". This was required with BIOS A01 due t= o the problem with I2S audio. This I2S audio problem has been resolved= for BIOS A02 and BIOS A03. With no options applied on the kernel comm= and line the system will run in I2C touchpad and HDA audio. All new machines will be coming with A03 or later. Users with earlier = versions have been advised to upgrade to fix this among other issues. The HDA audio will work correctly for output with 4.0. It will work pr= operly for input when these two patches are applied (which will land in= 4.1) https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/?h=3D= for-next&id=3De1e62b98ebddc3234f3259019d3236f66fc667f8 and https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/?h=3D= for-next&id=3Df3b703326541d0c1ce85f5e570f6d2b6bd4296ec If the patch to disambiguate the value of _REV() lands in 4.1 the audio= will begin to operate fully in I2S mode and the necessary support will= be included in 4.1 as well. So with all those factors I feel that it's a very low risk that users w= ill end up in PS2 mode with the current development focus kernels. Thanks, -- To unsubscribe from this list: send the line "unsubscribe linux-input" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html