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authorJason Gerecke <killertofu@gmail.com>2022-11-03 10:33:04 -0700
committerJiri Kosina <jkosina@suse.cz>2022-11-04 09:34:38 +0100
commitf77810f744139572a63e5a85ab6a8c10c2d44fb1 (patch)
treecbaa313d7fd1dd5fa95bcd665a012096da888016 /drivers/hid
parentb5bcb94b0954a026bbd671741fdb00e7141f9c91 (diff)
HID: wacom: Fix logic used for 3rd barrel switch emulation
When support was added for devices using an explicit 3rd barrel switch, the logic used by devices emulating this feature was broken. The 'if' statement / block that was introduced only handles the case where the button is pressed (i.e. 'barrelswitch' and 'barrelswitch2' are both set) but not the case where it is released (i.e. one or both being cleared). This results in a BTN_STYLUS3 "down" event being sent when the button is pressed, but no "up" event ever being sent afterwards. This patch restores the previously-used logic for determining button states in the emulated case so that switches are reported correctly again. Link: https://github.com/linuxwacom/xf86-input-wacom/issues/292 Fixes: 6d09085b38e5 ("HID: wacom: Adding Support for new usages") CC: stable@vger.kernel.org #v5.19+ Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com> Tested-by: Joshua Dickens <joshua.dickens@wacom.com> Reviewed-by: Ping Cheng <ping.cheng@wacom.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/wacom_wac.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index 77486962a773..0f3d57b42684 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -2520,11 +2520,12 @@ static void wacom_wac_pen_report(struct hid_device *hdev,
if (!delay_pen_events(wacom_wac) && wacom_wac->tool[0]) {
int id = wacom_wac->id[0];
- if (wacom_wac->features.quirks & WACOM_QUIRK_PEN_BUTTON3 &&
- wacom_wac->hid_data.barrelswitch & wacom_wac->hid_data.barrelswitch2) {
- wacom_wac->hid_data.barrelswitch = 0;
- wacom_wac->hid_data.barrelswitch2 = 0;
- wacom_wac->hid_data.barrelswitch3 = 1;
+ if (wacom_wac->features.quirks & WACOM_QUIRK_PEN_BUTTON3) {
+ int sw_state = wacom_wac->hid_data.barrelswitch |
+ (wacom_wac->hid_data.barrelswitch2 << 1);
+ wacom_wac->hid_data.barrelswitch = sw_state == 1;
+ wacom_wac->hid_data.barrelswitch2 = sw_state == 2;
+ wacom_wac->hid_data.barrelswitch3 = sw_state == 3;
}
input_report_key(input, BTN_STYLUS, wacom_wac->hid_data.barrelswitch);
input_report_key(input, BTN_STYLUS2, wacom_wac->hid_data.barrelswitch2);