diff options
author | Jeff Brown <jeffbrown@google.com> | 2011-04-13 02:29:38 -0400 |
---|---|---|
committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-04-13 02:35:24 -0400 |
commit | 9fb0f14e31b6101a0cc69a333b43541044f9b0a6 (patch) | |
tree | a384acf387f5dff50e0c3a56fa54336dedd286c5 /Documentation | |
parent | b1e064b81e238d47cb56544b34c9baf473e09837 (diff) |
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')
-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 f13aee55040..23fcb05175b 100644 --- a/Documentation/input/event-codes.txt +++ b/Documentation/input/event-codes.txt | |||
@@ -85,6 +85,12 @@ sent in the evdev event stream. | |||
85 | - Used to synchronize and separate touch events. See the | 85 | - Used to synchronize and separate touch events. See the |
86 | multi-touch-protocol.txt document for more information. | 86 | multi-touch-protocol.txt document for more information. |
87 | 87 | ||
88 | * SYN_DROPPED: | ||
89 | - Used to indicate buffer overrun in the evdev client's event queue. | ||
90 | Client should ignore all events up to and including next SYN_REPORT | ||
91 | event and query the device (using EVIOCG* ioctls) to obtain its | ||
92 | current state. | ||
93 | |||
88 | EV_KEY: | 94 | EV_KEY: |
89 | ---------- | 95 | ---------- |
90 | EV_KEY events take the form KEY_<name> or BTN_<name>. For example, KEY_A is used | 96 | EV_KEY events take the form KEY_<name> or BTN_<name>. For example, KEY_A is used |