On Tue, Aug 31, 2010 at 10:02:38PM -0500, Chris Bagwell wrote: > On Tue, Aug 31, 2010 at 12:44 AM, Peter Hutterer > <peter.hutte...@who-t.net> wrote: > > On Wed, Aug 25, 2010 at 06:28:53PM +0200, Ping Cheng wrote: > >> On Wed, Aug 25, 2010 at 5:04 PM, Chris Bagwell <ch...@cnpbagwell.com> > >> wrote: > >> > Sure, I'll jump back in once the touch-only model support is > >> > committed. Assuming Henrik's patch is submit, there is some things to > >> > discuss on X side; which I will be happy to help with as well. > >> > >> Thank you for your help. > >> > >> > Henrik's current driver on linux-input is both MT and synaptic-like; > >> > which is actually my preference as well but brings up important issue. > >> > Do we modify xf86-input-wacom to be compatible with synpatic-like > >> > input events or do we work with distributions to develop rules to > >> > re-direct wacom "touch" input devices over to xf86-input-synaptics? > >> > >> I'd like to know Peter's answer to this question. It is not purely a > >> Wacom driver decision, I think. > > > > AFAICT, the device is exported as a separate device, right? If so, there's > > no need to hook the wacom driver onto it - we just treat it as a touchpad > > and hook the synaptics driver onto it. > > > > Yes, on both Bamboo's and Tablet PC's, the exported device is nicely > isolated. In Bamboo's case, its very much like a standard touchpad > (x/y/pressure+4 buttons). For Tablet PC's, its very much like a > buttonless touchpad.
I missed the tablet PC case. Can you point me to the commit that added this? > Some pros/cons for having xf86-input-synaptics handle wacom touch devices. > > Pros: > * Get synaptics gesture support immediately (edge scrolling, two > finger scrolling). > * Get gnome-mouse-properties (and similar) GUI configuration support > (I can finally enable Lefty mode from a GUI!) > * It will force us to be Synaptics compatible. This allows switching > to xf86-input-multitouch driver and get their gestures (swipes, > pinching, 3-fingers, etc). Or at least it keeps us closer to > compatible to what ever client-side gesture engines are coming up. > > Cons: > * ISDV4 devices requires some touchpad logic in xf86-input-wacom > anyways (not a code savings) 2.6.37 will have kernel MT slot support for ISDV4, the patch for this has recently been committed. However, this does not split into multiple devices, I need to look into Henrik's patch again to see how that works. either way, wcmISDV4.c is a dead end, or at least will be soon. > * User would lose xf86-input-wacom's advanced button remapping. meh. I'm not convinced yet this button remapping is solving more issues than it causes... > My suggestion? > > * Make touchpad-like wacom devices to use events that are > synaptics-like (no multiplexing, no serial/channel #'s, change way > BTN_TOOL_*'s are used, use MT events for 2 finger HW, etc). This > means specifically Bamboo and Tablet PC's. Since Tablet PC code has > already shipped in a kernel, we need a roadmap of how and when to > convert over. > * Modify xf86-input-wacom so that it can handle todays ISDV4/TabletPC > version of touchpads and also make it compatible with synaptics-like > touchpads. Since its backwards/forwards compatible, that roadmap for > TabletPC can be change it today. > * Decide which X driver we prefer as default and then let user do any > xorg.conf.d modifications if they prefer a specific pro/con item > above. IMO, wacom is a _tablet_ driver. This means it should handle tablets as good as possible but it should not become a touchpad driver just because some tablets start looking like touchpads. Long term we're looking at true multitouch anyway and I'm not sure how synaptics will hold up in this regard. Cheers, Peter ------------------------------------------------------------------------------ This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd _______________________________________________ Linuxwacom-devel mailing list Linuxwacom-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxwacom-devel
