On Wed, Aug 23, 2017 at 5:08 PM, Bastien Nocera <hadess@xxxxxxxxxx> wrote: > On Wed, 2017-08-23 at 16:57 -0700, Roderick Colenbrander wrote: >> On Wed, Aug 23, 2017 at 2:04 AM, Bastien Nocera <hadess@xxxxxxxxxx> >> wrote: >> > > <snip> >> > I'm not sure I fully understand the problem you're trying to solve. >> > >> > Is it "old software which relies on joydev is too basic to allow >> > selecting the correct joystick device"? Or "some system components >> > are >> > picking up the joypad's accelerometer like it inferred the screen's >> > positioning"? >> > >> >> The problem is more like the first. Joydev is too basic to allow >> applications to determine they are dealing with a motion sensor >> device >> (axes are just numbers from its perspective). Due to recent hid-sony >> restructure, its motion sensors are now picked up by joydev as it >> passes joydev its heuristics. >> >> We felt that no motion sensors should probably get picked up by the >> legacy joydev interface as it caused issues for legacy applications >> (and users reported issues to me). Originally we proposed filtering >> in >> joydev based on just 'INPUT_PROP_ACCELEROMETER' as it has similar >> filters to filter out touchpad device and others. Discussion on that >> patch led to the composite device discussion as Dmitry felt that the >> ability to use a standalone motion sensor device as a joystick could >> potentially make sense. > > In which case a INPUT_PROP_JOYDEV_IGNORE property would be much much > more descriptive of what you want to achieve with this patchset, and > avoids confusion. > > I think that INPUT_PROP_COMPOSITE might have its place (and it would be > useful to have supported in toolkits, or wayland compositors), but not > for this purpose. > > I'd say repurpose the whole patchset around INPUT_PROP_JOYDEV_IGNORE > and we can look into a more complete INPUT_PROP_COMPOSITE with ioctl() > and co. > > Cheers That sounds like a good idea. The only downside is that this flag would also get exposed to user space, but I guess that could be okay. -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
