diff options
| author | Henrik Rydberg <rydberg@euromail.se> | 2014-07-25 17:16:42 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-08-07 23:37:07 -0700 |
| commit | f8ec894945e7d205ce62be59e55e72c4304e4739 (patch) | |
| tree | 7ae5c54a70668c0b1a619907369e99c184666d05 /drivers/input | |
| parent | 437d4f3797041942947ec838cf5d65f770562c5d (diff) | |
Input: MT - make slot cleanup callable outside mt_sync_frame()
Some semi-mt drivers use the slots in a manual way, but may still
want to call parts of the frame synchronization logic. This patch
makes input_mt_drop_unused callable from those drivers.
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/input-mt.c | 38 |
1 files changed, 27 insertions, 11 deletions
diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c index d398f1321f14..c30204f2fa30 100644 --- a/drivers/input/input-mt.c +++ b/drivers/input/input-mt.c @@ -237,6 +237,31 @@ void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count) EXPORT_SYMBOL(input_mt_report_pointer_emulation); /** + * input_mt_drop_unused() - Inactivate slots not seen in this frame + * @dev: input device with allocated MT slots + * + * Lift all slots not seen since the last call to this function. + */ +void input_mt_drop_unused(struct input_dev *dev) +{ + struct input_mt *mt = dev->mt; + int i; + + if (!mt) + return; + + for (i = 0; i < mt->num_slots; i++) { + if (!input_mt_is_used(mt, &mt->slots[i])) { + input_mt_slot(dev, i); + input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, -1); + } + } + + mt->frame++; +} +EXPORT_SYMBOL(input_mt_drop_unused); + +/** * input_mt_sync_frame() - synchronize mt frame * @dev: input device with allocated MT slots * @@ -247,27 +272,18 @@ EXPORT_SYMBOL(input_mt_report_pointer_emulation); void input_mt_sync_frame(struct input_dev *dev) { struct input_mt *mt = dev->mt; - struct input_mt_slot *s; bool use_count = false; if (!mt) return; - if (mt->flags & INPUT_MT_DROP_UNUSED) { - for (s = mt->slots; s != mt->slots + mt->num_slots; s++) { - if (input_mt_is_used(mt, s)) - continue; - input_mt_slot(dev, s - mt->slots); - input_event(dev, EV_ABS, ABS_MT_TRACKING_ID, -1); - } - } + if (mt->flags & INPUT_MT_DROP_UNUSED) + input_mt_drop_unused(dev); if ((mt->flags & INPUT_MT_POINTER) && !(mt->flags & INPUT_MT_SEMI_MT)) use_count = true; input_mt_report_pointer_emulation(dev, use_count); - - mt->frame++; } EXPORT_SYMBOL(input_mt_sync_frame); |