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authorEric Miao <eric.y.miao@gmail.com>2009-04-14 10:38:35 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2009-04-15 08:58:22 -0700
commit7f6d5ff22b06d0c4db7b3b1eae336a19e88f808c (patch)
tree398a0a72a95d0db453fa702e20c8e8654eaf034a /drivers/input
parent93ff27c66de5c9eb0ead1e6f979afa97cbcf1e9d (diff)
Input: da9034-ts - make pen {down,up} events more reliable
PEN_{UP/DOWN} events are expected to be available soon after stopping TSI auto measurement, but this is found not always be true. Work around this by adding delay and simulating such an event (according to pen down status bit). Signed-off-by: Bin Yang <bin.yang@marvell.com> Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/touchscreen/da9034-ts.c26
1 files changed, 16 insertions, 10 deletions
diff --git a/drivers/input/touchscreen/da9034-ts.c b/drivers/input/touchscreen/da9034-ts.c
index 666a6e74be40..3ffd4c4b170c 100644
--- a/drivers/input/touchscreen/da9034-ts.c
+++ b/drivers/input/touchscreen/da9034-ts.c
@@ -176,6 +176,16 @@ static void da9034_event_handler(struct da9034_touch *touch, int event)
goto err_reset;
touch->state = STATE_STOP;
+
+ /* FIXME: PEN_{UP/DOWN} events are expected to be
+ * available by stopping TSI, but this is found not
+ * always true, delay and simulate such an event
+ * here is more reliable
+ */
+ mdelay(1);
+ da9034_event_handler(touch,
+ is_pen_down(touch) ? EVENT_PEN_DOWN :
+ EVENT_PEN_UP);
break;
case STATE_STOP:
@@ -190,8 +200,6 @@ static void da9034_event_handler(struct da9034_touch *touch, int event)
report_pen_up(touch);
touch->state = STATE_IDLE;
}
-
- input_sync(touch->input_dev);
break;
case STATE_WAIT:
@@ -201,8 +209,10 @@ static void da9034_event_handler(struct da9034_touch *touch, int event)
if (is_pen_down(touch)) {
start_tsi(touch);
touch->state = STATE_BUSY;
- } else
+ } else {
+ report_pen_up(touch);
touch->state = STATE_IDLE;
+ }
break;
}
return;
@@ -227,16 +237,12 @@ static int da9034_touch_notifier(struct notifier_block *nb,
struct da9034_touch *touch =
container_of(nb, struct da9034_touch, notifier);
- if (event & DA9034_EVENT_PEN_DOWN) {
- if (is_pen_down(touch))
- da9034_event_handler(touch, EVENT_PEN_DOWN);
- else
- da9034_event_handler(touch, EVENT_PEN_UP);
- }
-
if (event & DA9034_EVENT_TSI_READY)
da9034_event_handler(touch, EVENT_TSI_READY);
+ if ((event & DA9034_EVENT_PEN_DOWN) && touch->state == STATE_IDLE)
+ da9034_event_handler(touch, EVENT_PEN_DOWN);
+
return 0;
}