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| author | HungNien Chen <hn.chen@weidahitech.com> | 2017-03-06 06:30:14 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2017-03-06 16:48:32 +0300 |
| commit | e9d0a26d34818e0f9340316f8016129231560966 (patch) | |
| tree | 91bccc7785f4a1069ad8dd7bd4c2cc52a1c812c8 /drivers/w1/w1_int.h | |
| parent | 81bbef23db51c0b450d90607fbbc2ad80ee0d43f (diff) | |
| download | linux-e9d0a26d34818e0f9340316f8016129231560966.tar.xz | |
HID: multitouch: change for touch height/width
Quoting from Jonathan Clarke in previous thread(2017/01/24):
"This division by 2 was added along with the touch width/height fields 6 years
ago so that those fields 'match the visual scale of the touch' for a specific
device (3M PCT)" "The scaling is also discarding information about touch size
(1 bit for each of width/height) which is useful for any application that wants
to know about it."
Jonathan mentioned just what I thought in a new project recently. It dosen't
make sense to discard 1 bit width/height in general case according to the spec
in multi-touch-protocol.txt so I would like to make a slight change here.
A quirk MT_QUIRK_TOUCH_SIZE_SCALING was added to service devices like 3M PCT
with a special visual scale and the division by 2 only take effect with devices
like that.
[jkosina@suse.cz: reformat changelog]
Signed-off-by: HungNien Chen <hn.chen@weidahitech.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/w1/w1_int.h')
0 files changed, 0 insertions, 0 deletions