On Mar 19 2017 or thereabouts, Dmitry Torokhov wrote: > Hi, > > This is refresh of Benjamin's patches trying to bridge PS/2 and SMbus > devices for better support of Synaptics RMI4 touchpads (and Elans later). > > The main difference is that we do not have platform device, as it only > adds another indirection level, and have psmouse create SMBus companion > directly. Because serio ports complete registration asynchronously, we do > not deadlock on psmouse_mutex when even if we have a pass-through port. > (Frankly we need to revisit this whole serio and psmouse thing, use of > global serio_mutex and psmouse_mutex is hurting us; they were needed when > driver core could not recursively iterate over device and driver lists). > > We also do not allow overriding serio driver, instead we teach psmouse > about "special" devices and let it continue own the serio port and make > sure nobody else touches it. > > To work around issue with psmouse_reconnect() running sometimes too late, > we add "fast reconnect" option to serio. Not too pretty, but gets the job > done. We may need to revisit whole serio PM story later and stop "cheating" > and pretending that device is resumed when it is not, but for that we need > to teach PM core about devices that are OK not to wait for before resuming > userspace. Anyway, much bigger topic for later. > > This seems to be working on X1 Carbon and HP 1040 with forcepad, but > to fully support forcepad we need implementation of RMI F21, so patch #9 > is more of FYI. > > Please do shout if you see something wrong, otherwise I'll queue it for > next in the next couple of days (sans forcetouch patch). > I just gave it a quick test, and it still behave properly on the T450s as well. So I vote yes for including it ;) Cheers, Benjamin > Thanks, > Dmitry > > v3: stop trying to detect presence of SMbus companion device when new > adapter is discovered, as it does not really work. Instead issue serio > rescan request and let probe code deal with it (which seems to be more > reliable). > Fix various compile glitches with different config options. > Added Benjamin's reviewed-bys. > > V2: incorporated Benjamin's change to keep platform data around until > companion device is destroyed, enabled forcepad support. > > Benjamin Tissoires (2): > Input: psmouse - add support for SMBus companions > Input: synaptics - add support for Intertouch devices > > Dmitry Torokhov (7): > i2c: export i2c_client_type structure > Input: serio - add fast reconnect option > Input: psmouse - implement fast reconnect option > Input: psmouse - store pointer to current protocol > Input: psmouse - introduce notion of SMBus companions > Input: synaptics - split device info into a separate structure > [NEEDS F21] Input: synaptics - switch forcepad devices over to SMbus > access > > drivers/i2c/i2c-core.c | 4 +- > drivers/input/mouse/Kconfig | 16 + > drivers/input/mouse/Makefile | 2 + > drivers/input/mouse/psmouse-base.c | 213 ++++++--- > drivers/input/mouse/psmouse-smbus.c | 294 +++++++++++++ > drivers/input/mouse/psmouse.h | 102 +++-- > drivers/input/mouse/synaptics.c | 841 +++++++++++++++++++++++------------- > drivers/input/mouse/synaptics.h | 33 +- > drivers/input/serio/serio.c | 22 +- > include/linux/i2c.h | 1 + > include/linux/serio.h | 1 + > 11 files changed, 1122 insertions(+), 407 deletions(-) > create mode 100644 drivers/input/mouse/psmouse-smbus.c > > -- > 2.12.0.367.g23dc2f6d3c-goog > -- 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
