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authorDaniel Kurtz <djkurtz@chromium.org>2011-07-06 22:39:14 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2011-07-06 23:01:09 -0700
commita9f0b79edfda3750d254ba5b192795e2554c361d (patch)
treec7fac3d08d6a031dd6fa356eb68c28c00d4367a6 /drivers/input/mouse/synaptics.h
parent8be3c650f54c259694e82282e54b12c14304487e (diff)
Input: synaptics - fuzz position for touchpad with reduced filtering
Synaptics touchpads indicate via a capability bit when they perform reduced filtering on position data. In such a case, use a non-zero fuzz value. Fuzz = 8 was chosen empirically by observing the raw position data reported by a clickpad indicating it had reduced filtering. Signed-off-by: Daniel Kurtz <djkurtz@chromium.org> Acked-by: Chase Douglas <chase.douglas@canonical.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/mouse/synaptics.h')
-rw-r--r--drivers/input/mouse/synaptics.h10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h
index 7453938bf5ef..b8025b0ee2bd 100644
--- a/drivers/input/mouse/synaptics.h
+++ b/drivers/input/mouse/synaptics.h
@@ -66,9 +66,9 @@
* 1 0x60 multifinger mode identifies firmware finger counting
* (not reporting!) algorithm.
* Not particularly meaningful
- * 1 0x80 covered pad W clipped to 14, 15 == pad mostly covered
- * 2 0x01 clickpad bit 1 2-button ClickPad
- * 2 0x02 deluxe LED controls touchpad support LED commands
+ * 1 0x80 covered pad W clipped to 14, 15 == pad mostly covered
+ * 2 0x01 clickpad bit 1 2-button ClickPad
+ * 2 0x02 deluxe LED controls touchpad support LED commands
* ala multimedia control bar
* 2 0x04 reduced filtering firmware does less filtering on
* position data, driver should watch
@@ -78,6 +78,7 @@
#define SYN_CAP_CLICKPAD2BTN(ex0c) ((ex0c) & 0x000100) /* 2-button ClickPad */
#define SYN_CAP_MAX_DIMENSIONS(ex0c) ((ex0c) & 0x020000)
#define SYN_CAP_ADV_GESTURE(ex0c) ((ex0c) & 0x080000)
+#define SYN_CAP_REDUCED_FILTERING(ex0c) ((ex0c) & 0x000400)
/* synaptics modes query bits */
#define SYN_MODE_ABSOLUTE(m) ((m) & (1 << 7))
@@ -104,6 +105,9 @@
#define SYN_NEWABS_RELAXED 2
#define SYN_OLDABS 3
+/* amount to fuzz position data when touchpad reports reduced filtering */
+#define SYN_REDUCED_FILTER_FUZZ 8
+
/*
* A structure to describe the state of the touchpad hardware (buttons and pad)
*/