From a9f0b79edfda3750d254ba5b192795e2554c361d Mon Sep 17 00:00:00 2001 From: Daniel Kurtz Date: Wed, 6 Jul 2011 22:39:14 -0700 Subject: 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 Acked-by: Chase Douglas Signed-off-by: Dmitry Torokhov --- drivers/input/mouse/synaptics.h | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'drivers/input/mouse/synaptics.h') 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) */ -- cgit v1.2.3-59-g8ed1b