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| author |   Daniel Kurtz <djkurtz@chromium.org> | 2011-07-06 22:39:14 -0700 |
|---|---|---|
| committer |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-07-06 23:01:09 -0700 |
| commit | a9f0b79edfda3750d254ba5b192795e2554c361d (patch) | |
| tree | c7fac3d08d6a031dd6fa356eb68c28c00d4367a6 /drivers/input/mouse/synaptics.h | |
| parent | Input: synaptics - set resolution for MT_POSITION_X/Y axes (diff) | |
| download | linux-dev-a9f0b79edfda3750d254ba5b192795e2554c361d.tar.xz linux-dev-a9f0b79edfda3750d254ba5b192795e2554c361d.zip | |
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.h | 10 |
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) */ |