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Input: MT - add INPUT_MT_TOTAL_FORCE flags

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Add a flag to generate ABS_PRESSURE as sum of ABS_MT_PRESSURE across
all slots.
This flag should be set if one knows a device reports true force and would
like to report total force to the userspace.

Signed-off-by: Angela Czubak <aczubak@google.com>
Co-developed-by: Jonathan Denose <jdenose@google.com>
Signed-off-by: Jonathan Denose <jdenose@google.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
This commit is contained in:
Angela Czubak
2025-08-18 23:08:50 +00:00
committed by Benjamin Tissoires
parent a77efca3aa
commit 4e584ac737
2 changed files with 11 additions and 4 deletions
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1
include/linux/input/mt.h
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@@ -17,6 +17,7 @@
#define INPUT_MT_DROP_UNUSED 0x0004 /* drop contacts not seen in frame */
#define INPUT_MT_TRACK 0x0008 /* use in-kernel tracking */
#define INPUT_MT_SEMI_MT 0x0010 /* semi-mt device, finger count handled manually */
#define INPUT_MT_TOTAL_FORCE 0x0020 /* calculate total force from slots pressure */
/**
* struct input_mt_slot - represents the state of an input MT slot