Commit 257867dc authored by Peter Hutterer's avatar Peter Hutterer Committed by Henrik Rydberg

Input: MT - Specify that ABS_MT_SLOT must have a minimum of 0

This is effectively already in force through input_mt_init_slots, and uinput
too ignores the actual minimum.

Since slots are a kernel-genenerated axis only, non-zero minimums make
little sense and are likely to cause errors. Better to treat a non-zero
minimum as kernel bug if it ever happens.
Signed-off-by: default avatarPeter Hutterer <peter.hutterer@who-t.net>
Acked-by: default avatarBenjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: default avatarHenrik Rydberg <rydberg@euromail.se>
parent 317ddd25
...@@ -80,6 +80,8 @@ Userspace can detect that a driver can report more total contacts than slots ...@@ -80,6 +80,8 @@ Userspace can detect that a driver can report more total contacts than slots
by noting that the largest supported BTN_TOOL_*TAP event is larger than the by noting that the largest supported BTN_TOOL_*TAP event is larger than the
total number of type B slots reported in the absinfo for the ABS_MT_SLOT axis. total number of type B slots reported in the absinfo for the ABS_MT_SLOT axis.
The minimum value of the ABS_MT_SLOT axis must be 0.
Protocol Example A Protocol Example A
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