HID: wacom: make sure touch arbitration is applied consistently

stylus_in_proximity is used to make sure no touch event is sent while pen is in
proximity. touch_down is used to make sure a touch up event is sent when pen
comes into proximity while touch is down.

Two touch routines didn't store touch_down. One touch routine forgot to check
stylus_in_proximity before sending touch events. This patch fixes those issues.

Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index f8861494f4e3..6d490f602cfd 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -1042,7 +1042,7 @@ static int wacom_24hdt_irq(struct wacom_wac *wacom)
 
         for (i = 0; i < contacts_to_send; i++) {
                 int offset = (WACOM_BYTES_PER_24HDT_PACKET * i) + 1;
-                bool touch = data[offset] & 0x1 && !wacom->shared->stylus_in_proximity;
+                bool touch = (data[offset] & 0x1) && !wacom->shared->stylus_in_proximity;
                 int slot = input_mt_get_slot_by_key(input, data[offset + 1]);
 
                 if (slot < 0)
@@ -1072,6 +1072,7 @@ static int wacom_24hdt_irq(struct wacom_wac *wacom)
         if (wacom->num_contacts_left <= 0)
                 wacom->num_contacts_left = 0;
 
+        wacom->shared->touch_down = (wacom->num_contacts_left > 0);
         return 1;
 }
 
@@ -1100,7 +1101,7 @@ static int wacom_mt_touch(struct wacom_wac *wacom)
 
         for (i = 0; i < contacts_to_send; i++) {
                 int offset = (WACOM_BYTES_PER_MT_PACKET + x_offset) * i + 3;
-                bool touch = data[offset] & 0x1;
+                bool touch = (data[offset] & 0x1) && !wacom->shared->stylus_in_proximity;
                 int id = get_unaligned_le16(&data[offset + 1]);
                 int slot = input_mt_get_slot_by_key(input, id);
 
@@ -1122,6 +1123,7 @@ static int wacom_mt_touch(struct wacom_wac *wacom)
         if (wacom->num_contacts_left < 0)
                 wacom->num_contacts_left = 0;
 
+        wacom->shared->touch_down = (wacom->num_contacts_left > 0);
         return 1;
 }