xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Input: synaptics - fuzz position for touchpad with reduced filtering

Browse Source 
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>
This commit is contained in:
Daniel Kurtz
2011-07-06 22:39:14 -07:00
committed by Dmitry Torokhov
parent 8be3c650f5
commit a9f0b79edf
2 changed files with 15 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/input/mouse/synaptics.h
View File

@@ -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)
*/