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authorHenrik Rydberg <rydberg@euromail.se>2014-07-25 17:16:42 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2014-08-07 23:37:07 -0700
commitf8ec894945e7d205ce62be59e55e72c4304e4739 (patch)
tree7ae5c54a70668c0b1a619907369e99c184666d05 /drivers/input/input-mt.c
parentInput: atmel_mxt_ts - mXT224 DMA quirk was fixed in firmware v2.0.AA (diff)
downloadlinux-dev-f8ec894945e7d205ce62be59e55e72c4304e4739.tar.xz
linux-dev-f8ec894945e7d205ce62be59e55e72c4304e4739.zip
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/input-mt.c')
-rw-r--r--drivers/input/input-mt.c38
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);