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| -rw-r--r-- | Documentation/input/multi-touch-protocol.txt | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/input/multi-touch-protocol.txt b/Documentation/input/multi-touch-protocol.txt index 2c179613f81..de139b18184 100644 --- a/Documentation/input/multi-touch-protocol.txt +++ b/Documentation/input/multi-touch-protocol.txt @@ -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 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 ------------------ |