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Subject[PATCH 4.19 237/271] HID: wacom: generic: Correct pad syncing
Date
From: Aaron Armstrong Skomra <skomra@gmail.com>

commit d4b8efeb46d99a5d02e7f88ac4eaccbe49370770 upstream.

Only sync the pad once per report, not once per collection.
Also avoid syncing the pad on battery reports.

Fixes: f8b6a74719b5 ("HID: wacom: generic: Support multiple tools per report")
Cc: <stable@vger.kernel.org> # v4.17+
Signed-off-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/hid/wacom_wac.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)

--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -2119,14 +2119,12 @@ static void wacom_wac_pad_report(struct
bool active = wacom_wac->hid_data.inrange_state != 0;

/* report prox for expresskey events */
- if ((wacom_equivalent_usage(field->physical) == HID_DG_TABLETFUNCTIONKEY) &&
- wacom_wac->hid_data.pad_input_event_flag) {
+ if (wacom_wac->hid_data.pad_input_event_flag) {
input_event(input, EV_ABS, ABS_MISC, active ? PAD_DEVICE_ID : 0);
input_sync(input);
if (!active)
wacom_wac->hid_data.pad_input_event_flag = false;
}
-
}

static void wacom_wac_pen_usage_mapping(struct hid_device *hdev,
@@ -2723,9 +2721,7 @@ static int wacom_wac_collection(struct h
if (report->type != HID_INPUT_REPORT)
return -1;

- if (WACOM_PAD_FIELD(field) && wacom->wacom_wac.pad_input)
- wacom_wac_pad_report(hdev, report, field);
- else if (WACOM_PEN_FIELD(field) && wacom->wacom_wac.pen_input)
+ if (WACOM_PEN_FIELD(field) && wacom->wacom_wac.pen_input)
wacom_wac_pen_report(hdev, report);
else if (WACOM_FINGER_FIELD(field) && wacom->wacom_wac.touch_input)
wacom_wac_finger_report(hdev, report);
@@ -2739,7 +2735,7 @@ void wacom_wac_report(struct hid_device
struct wacom_wac *wacom_wac = &wacom->wacom_wac;
struct hid_field *field;
bool pad_in_hid_field = false, pen_in_hid_field = false,
- finger_in_hid_field = false;
+ finger_in_hid_field = false, true_pad = false;
int r;
int prev_collection = -1;

@@ -2755,6 +2751,8 @@ void wacom_wac_report(struct hid_device
pen_in_hid_field = true;
if (WACOM_FINGER_FIELD(field))
finger_in_hid_field = true;
+ if (wacom_equivalent_usage(field->physical) == HID_DG_TABLETFUNCTIONKEY)
+ true_pad = true;
}

wacom_wac_battery_pre_report(hdev, report);
@@ -2778,6 +2776,9 @@ void wacom_wac_report(struct hid_device
}

wacom_wac_battery_report(hdev, report);
+
+ if (true_pad && wacom->wacom_wac.pad_input)
+ wacom_wac_pad_report(hdev, report, field);
}

static int wacom_bpt_touch(struct wacom_wac *wacom)

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