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authorAllen Hung <allen_hung@dell.com>2015-11-20 18:21:06 +0800
committerJiri Kosina <jkosina@suse.cz>2015-11-26 15:20:57 +0100
commit25a84db15b3f3a24d3ea7d2baf90693bcff34b0c (patch)
tree205ad49941b0b29c36f162bb7d2511735ce3178d /drivers/hid
parent319645cac26c2d065a485f5d59228433ad602f71 (diff)
downloadlinux-25a84db15b3f3a24d3ea7d2baf90693bcff34b0c.tar.bz2
HID: multitouch: enable palm rejection if device implements confidence usage
The usage Confidence is mandary to Windows Precision Touchpad devices. The appearance of this usage is checked in hidinput_connect but the quirk MT_QUIRK_VALID_IS_CONFIDENCE is not applied to device accordingly. Apply this quirk and also remove quirk MT_QUIRK_ALWAYS_VALID to enable palm rejection for the WIN 8 touchpad devices which have implemented usage Confidence in its input reports. Tested on Dell XPS 13 laptop. Signed-off-by: Allen Hung <allen_hung@dell.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-multitouch.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 3d664d01305e..351ddd297792 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -486,6 +486,11 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
mt_store_field(usage, td, hi);
return 1;
case HID_DG_CONFIDENCE:
+ if (cls->name == MT_CLS_WIN_8 &&
+ field->application == HID_DG_TOUCHPAD) {
+ cls->quirks &= ~MT_QUIRK_ALWAYS_VALID;
+ cls->quirks |= MT_QUIRK_VALID_IS_CONFIDENCE;
+ }
mt_store_field(usage, td, hi);
return 1;
case HID_DG_TIPSWITCH: