On Sun, 22 May 2022, Angela Czubak wrote: > > This patch series introduces changes necessary to support devices > > using simple haptic HID pages. > > Implementation attempts to follow the discussion below: > > https://www.spinics.net/lists/linux-input/msg61091.html > > > > Introduce new haptic defines as specified in HID Usage Tables. > > > > Add new force feedback effect type in order to facilitate using > > simple haptic force feedback. > > > > Add INPUT_PROP_HAPTIC_TOUCHPAD to mark touchpad exposing simple haptic > > support. > > > > Add new struct hid_haptic_device so as to gather simple haptic related > > configuration and current state of the device. > > > > Add new functions to be triggered during HID input mapping and > > configuration in order to detect simple haptic devices. > > > > Modify HID input so that haptic output reports are parsed. > > > > Initialize a haptic device. > > > > Modify FF core so that effect IDs can be shared between multiple open file > > handles. > > > > Add shared release and press effects for a simple haptic device. > > > > Calculate pressure resolution if units are grams or newtons. > > > > Add support for kernel-driven mode of simple haptic device. > > > > Toggle ABS_PRESSURE generation by input-mt on request. > > > > Implement functions allowing switching between kernel-managed mode > > and autonomous mode. > > > > Add simple haptic support for hid-multitouch driver. > > > > Implement EVIOCFF(TAKE|RELEASE)CONTROL ioctls so that userspace can take > > and release control of shared release and press effects. > > > > Fix i2c hid sending and getting report so that report IDs larger than 0xF > > are handled correctly. > > > > v2: > > - Describe INPUT_PROP_HAPTIC_TOUCHPAD in > > Documentation/input/event-codes.rst > > - Do not extract mt_get_feature(), use hid_hw_wait() instead > > - Define HID_UNIT_GRAM and HID_UNIT_NEWTON > > - Calculate pressure sum in input-mt if INPUT_MT_TOTAL_FORCE flags set > > - Use u* instead of __u* in struct hid_haptic_device > > - Solve problems with report IDS >= 0xF as Dmitry suggests > > > > v3: > > - Get rid of INPUT_PROP_HAPTIC_TOUCHPAD property as haptic device does not > > gave to be a touchpad > > - Introduce notion of haptic forcepads; generate haptic feedback in kernel > > mode only for forcepads > > - Generate clicks based on maximum pressure across slots instead of the sum > > - Fix off-by-one bug in hid_haptic_upload_effect() > > - Fix resume/suspend: issue hid_haptic_resume() in mt_resume() and > > hid_haptic_suspend() in mt_suspend() > > - Add reset callback for HID i2c devices > > - Implement reset callback for HID multitouch haptic devices > > - Implement lid handler triggering touchpad recalibration for Redrix > > > > Angela Czubak (17): > > HID: add haptics page defines > > Input: add FF_HID effect type > > HID: haptic: introduce hid_haptic_device > > HID: input: allow mapping of haptic output > > HID: haptic: initialize haptic device > > Input: add shared effects > > HID: haptic: implement release and press effects > > HID: input: calculate resolution for pressure > > HID: haptic: add functions handling events > > Input: MT - add INPUT_MT_MAX_FORCE flags > > HID: haptic: add hid_haptic_switch_mode > > HID: multitouch: add haptic multitouch support > > Input: introduce EVIOCFF(TAKE|RELEASE)CONTROL > > HID: haptic: add hid_haptic_change_control > > HID: add HID device reset callback > > HID: haptic: implement HID haptic reset callback > > HID: multitouch: Add lid handler for touchpad on Redrix chromebook > > > > drivers/hid/Kconfig | 14 + > > drivers/hid/Makefile | 1 + > > drivers/hid/hid-haptic.c | 753 +++++++++++++++++++++++++++++ > > drivers/hid/hid-haptic.h | 152 ++++++ > > drivers/hid/hid-input.c | 18 +- > > drivers/hid/hid-multitouch.c | 313 +++++++++++- > > drivers/hid/i2c-hid/i2c-hid-core.c | 21 + > > drivers/input/evdev.c | 6 + > > drivers/input/ff-core.c | 129 ++++- > > drivers/input/input-mt.c | 16 +- > > include/linux/hid.h | 31 ++ > > include/linux/input.h | 5 + > > include/linux/input/mt.h | 1 + > > include/uapi/linux/input.h | 26 +- > > 14 files changed, 1469 insertions(+), 17 deletions(-) > > create mode 100644 drivers/hid/hid-haptic.c > > create mode 100644 drivers/hid/hid-haptic.h > > > > -- > > 2.36.0.550.gb090851708-goog > > > > Hi, could I get any feedback? :) Or should I wait for some features to > land in the upstream kernel? Hi Angela, I am in the process of reviewing the patchset, but I am not done with it yet. It won't land in 5.19 anyway, so if all goes good (and we also eventually get Ack from Dmitry at least for the Input-specific bits), we can potentially target 5.20 unless something substantial pops up. Please give me/us a few more days to process this. Thanks, -- Jiri Kosina SUSE Labs
