Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754322AbbLJRJC (ORCPT ); Thu, 10 Dec 2015 12:09:02 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39257 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752998AbbLJRJA (ORCPT ); Thu, 10 Dec 2015 12:09:00 -0500 Date: Thu, 10 Dec 2015 18:08:53 +0100 From: Benjamin Tissoires To: Dmitry Torokhov Cc: Jiri Kosina , Simon Wood , "linux-input@vger.kernel.org" , lkml , Edwin , Michal =?utf-8?B?TWFsw70=?= , elias vanderstuyft Subject: Re: [Patch-V2 1/6] INPUT: xpad: Add minimal support for Logitech G920 Wheel Message-ID: <20151210170853.GC16026@mail.corp.redhat.com> References: <1447345535-2912-1-git-send-email-simon@mungewell.org> <1447345535-2912-2-git-send-email-simon@mungewell.org> <20151119183106.GC24773@dtor-ws> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2360 Lines: 61 On Dec 09 2015 or thereabouts, Dmitry Torokhov wrote: > On Wed, Dec 9, 2015 at 5:23 PM, Dmitry Torokhov > wrote: > > On Thu, Nov 19, 2015 at 10:31 AM, Dmitry Torokhov > > wrote: > >> On Thu, Nov 19, 2015 at 02:50:51PM +0100, Jiri Kosina wrote: > >>> On Thu, 12 Nov 2015, Simon Wood wrote: > >>> > >>> > When plugged in the Logitech G920 wheel starts with USBID 046d:c261 > >>> > and behaviors as a vendor specific class. If a 'magic' byte sequence > >>> > is sent the wheel will detach and reconnect as a HID device with the > >>> > USBID 046d:c262. > >>> > > >>> > Signed-off-by: Simon Wood > >>> > >>> Adding Dmitry to CC. > >>> > >>> Dmitry, I am planning to take this through my tree together with the rest > >>> of the actual HID support for that device if you Ack this. > >> > >> Hmm, I have an incoming series for xbox that night clash with this... If > >> you'll put it in a clean branch off 4.3 I'd pull it and then get more > >> changes on top. > >> > >> Can we also change the subject as it is not about adding a minimal > >> support. Something like "Input: xpad - switch Logitech G920 Wheel into > >> HID mode" > >> > >> Otherwise: > >> > >> Acked-by: Dmitry Torokhov > > > > Hmm, looking sat this some more why are we waiting to switch device > > mode until after userspace opens input device instead of when we are > > executing driver probe()? > > > > Actually, thinking about it even more, why do we want to have this in > xpad.c? Have HID module handle both IDs and switch to HID mode if we > want HID to handle this device. I think we should revert/drop this > patch. > Hi Dmitry, IIRC, last time I saw an XBox-like controller, it doesn't register as a HID device at all. SO I think It will be hard to switch it into the HID mode from HID directly. Simon, can you confirm that the device does not contains any references to HID while in the XBox mode (lsusb -v should give enough information). Switching the device during probe in xpad.c makes a lot of sense however. Cheers, Benjamin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/