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authorPhilipp Merkel <mail@philmerk.de>2010-10-01 15:38:59 +0200
committerJiri Kosina <jkosina@suse.cz>2010-10-01 15:39:51 +0200
commitf51661105c3c8a0afcd69f995a4f4a10e53da153 (patch)
treee6ac6703e5b4973b2c5d23de6182e7725dff59f8 /drivers/hid/hid-input.c
parenta850ea30374ebed32a0724742601861853fde869 (diff)
HID: Fix for problems with eGalax/DWAV multi-touch-screen
This patch fixes three problems with the eGalax/DWAV multi-touch screen found in the Eee PC T101MT: 1) While there is a dedicated multitouch driver for the screen (hid-egalax.c), the MULTI_INPUT quirk is also applied, preventing the hid-egalax driver from working. This patch removes the quirk so the hid-egalax driver can handle the device correctly. 2) The x and y coordinates sent by the screen in multi-touch mode are shifted by three bits from the events sent in single-touch mode, thus the coordinates are out of range, leading to the pointer being stuck in the bottom-right corner if no additional calibration is applied (e.g. in the X evdev driver). This patch shifts the coordinates back. This does not decrease accuracy as the last three bits of the "wrong" coordinates are always 0. 3) Only multi-touch pressure events are sent, single touch emulation is missing pressure information. This patch adds single-touch ABS_PRESSURE events. Signed-off-by: Philipp Merkel <mail@philmerk.de> Acked-by: Stéphane Chatty <chatty@enac.fr> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-input.c')
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