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| author | Jeff Brown <jeffbrown@google.com> | 2011-04-13 10:29:38 +0400 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-04-13 10:35:24 +0400 |
| commit | 9fb0f14e31b6101a0cc69a333b43541044f9b0a6 (patch) | |
| tree | a384acf387f5dff50e0c3a56fa54336dedd286c5 /Documentation/input | |
| parent | b1e064b81e238d47cb56544b34c9baf473e09837 (diff) | |
| download | linux-9fb0f14e31b6101a0cc69a333b43541044f9b0a6.tar.xz | |
Input: evdev - indicate buffer overrun with SYN_DROPPED
Add a new EV_SYN code, SYN_DROPPED, to inform the client when input
events have been dropped from the evdev input buffer due to a
buffer overrun. The client should use this event as a hint to
reset its state or ignore all following events until the next
packet begins.
Signed-off-by: Jeff Brown <jeffbrown@android.com>
[dtor@mail.ru: Implement Henrik's suggestion and drop old events in
case of overflow.]
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'Documentation/input')
| -rw-r--r-- | Documentation/input/event-codes.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/input/event-codes.txt b/Documentation/input/event-codes.txt index f13aee550409..23fcb05175be 100644 --- a/Documentation/input/event-codes.txt +++ b/Documentation/input/event-codes.txt @@ -85,6 +85,12 @@ sent in the evdev event stream. - Used to synchronize and separate touch events. See the multi-touch-protocol.txt document for more information. +* SYN_DROPPED: + - Used to indicate buffer overrun in the evdev client's event queue. + Client should ignore all events up to and including next SYN_REPORT + event and query the device (using EVIOCG* ioctls) to obtain its + current state. + EV_KEY: ---------- EV_KEY events take the form KEY_<name> or BTN_<name>. For example, KEY_A is used |