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Commit c9cfb2ac authored by Ping Cheng's avatar Ping Cheng Committed by Jiri Kosina
Browse files

HID: wacom: generic: Don't sync input on empty input packets 



post input_sync only when there are input events posted

Signed-off-by: default avatarPing Cheng <ping.cheng@wacom.com>
Reviewed-By: default avatarJason Gerecke <jason.gerecke@wacom.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent f3f24e7b

drivers/hid/wacom_wac.c

+51 −25
Original line number Diff line number Diff line
@@ -1591,18 +1591,13 @@ static void wacom_wac_pad_usage_mapping(struct hid_device *hdev, 
	}

}



static void wacom_wac_pad_event(struct hid_device *hdev, struct hid_field *field,

static void wacom_wac_pad_battery_event(struct hid_device *hdev, struct hid_field *field,

		struct hid_usage *usage, __s32 value)

{

	struct wacom *wacom = hid_get_drvdata(hdev);

	struct wacom_wac *wacom_wac = &wacom->wacom_wac;

	struct input_dev *input = wacom_wac->pad_input;

	unsigned equivalent_usage = wacom_equivalent_usage(usage->hid);



	if (wacom_equivalent_usage(field->physical) == HID_DG_TABLETFUNCTIONKEY) {

		wacom_wac->hid_data.inrange_state |= value;

	}



	switch (equivalent_usage) {

	case WACOM_HID_WD_BATTERY_LEVEL:

		wacom_wac->hid_data.battery_capacity = value;
@@ -1614,11 +1609,28 @@ static void wacom_wac_pad_event(struct hid_device *hdev, struct hid_field *field 
		wacom_wac->hid_data.ps_connected = value;

		wacom_wac->hid_data.bat_connected = 1;

		break;

	}

}



static void wacom_wac_pad_event(struct hid_device *hdev, struct hid_field *field,

		struct hid_usage *usage, __s32 value)

{

	struct wacom *wacom = hid_get_drvdata(hdev);

	struct wacom_wac *wacom_wac = &wacom->wacom_wac;

	struct input_dev *input = wacom_wac->pad_input;

	struct wacom_features *features = &wacom_wac->features;

	unsigned equivalent_usage = wacom_equivalent_usage(usage->hid);



	if (wacom_equivalent_usage(field->physical) == HID_DG_TABLETFUNCTIONKEY) {

		wacom_wac->hid_data.inrange_state |= value;

	}



	switch (equivalent_usage) {

	case WACOM_HID_WD_TOUCHRINGSTATUS:

		break;



	default:

		features->input_event_flag = true;

		input_event(input, usage->type, usage->code, value);

		break;

	}
@@ -1633,21 +1645,12 @@ static void wacom_wac_pad_pre_report(struct hid_device *hdev, 
	wacom_wac->hid_data.inrange_state = 0;

}



static void wacom_wac_pad_report(struct hid_device *hdev,

static void wacom_wac_pad_battery_report(struct hid_device *hdev,

		struct hid_report *report)

{

	struct wacom *wacom = hid_get_drvdata(hdev);

	struct wacom_wac *wacom_wac = &wacom->wacom_wac;

	struct wacom_features *features = &wacom_wac->features;

	struct input_dev *input = wacom_wac->pad_input;

	bool active = wacom_wac->hid_data.inrange_state != 0;



	/*

	 * don't report prox for events like accelerometer

	 * or battery status

	 */

	if (wacom_equivalent_usage(report->field[0]->physical) == HID_DG_TABLETFUNCTIONKEY)

		input_event(input, EV_ABS, ABS_MISC, active ? PAD_DEVICE_ID : 0);



	if (features->quirks & WACOM_QUIRK_BATTERY) {

		int capacity = wacom_wac->hid_data.battery_capacity;
@@ -1658,9 +1661,28 @@ static void wacom_wac_pad_report(struct hid_device *hdev, 
		wacom_notify_battery(wacom_wac, capacity, charging,

				     connected, powered);

	}

}



static void wacom_wac_pad_report(struct hid_device *hdev,

		struct hid_report *report)

{

	struct wacom *wacom = hid_get_drvdata(hdev);

	struct wacom_wac *wacom_wac = &wacom->wacom_wac;

	struct wacom_features *features = &wacom_wac->features;

	struct input_dev *input = wacom_wac->pad_input;

	bool active = wacom_wac->hid_data.inrange_state != 0;



	/* report prox for expresskey events */

	if (wacom_equivalent_usage(report->field[0]->physical) == HID_DG_TABLETFUNCTIONKEY) {

		features->input_event_flag = true;

		input_event(input, EV_ABS, ABS_MISC, active ? PAD_DEVICE_ID : 0);

	}



	if (features->input_event_flag) {

		features->input_event_flag = false;

		input_sync(input);

	}

}



static void wacom_wac_pen_usage_mapping(struct hid_device *hdev,

		struct hid_field *field, struct hid_usage *usage)
@@ -2118,9 +2140,11 @@ void wacom_wac_event(struct hid_device *hdev, struct hid_field *field, 
	if (wacom->wacom_wac.features.type != HID_GENERIC)

		return;



	if (WACOM_PAD_FIELD(field) && wacom->wacom_wac.pad_input)

	if (WACOM_PAD_FIELD(field)) {

		wacom_wac_pad_battery_event(hdev, field, usage, value);

		if (wacom->wacom_wac.pad_input)

			wacom_wac_pad_event(hdev, field, usage, value);

	else if (WACOM_PEN_FIELD(field) && wacom->wacom_wac.pen_input)

	} else if (WACOM_PEN_FIELD(field) && wacom->wacom_wac.pen_input)

		wacom_wac_pen_event(hdev, field, usage, value);

	else if (WACOM_FINGER_FIELD(field) && wacom->wacom_wac.touch_input)

		wacom_wac_finger_event(hdev, field, usage, value);
@@ -2163,12 +2187,14 @@ void wacom_wac_report(struct hid_device *hdev, struct hid_report *report) 


	wacom_report_events(hdev, report);



	if (WACOM_PAD_FIELD(field) && wacom->wacom_wac.pad_input)

		return wacom_wac_pad_report(hdev, report);

	else if (WACOM_PEN_FIELD(field) && wacom->wacom_wac.pen_input)

		return wacom_wac_pen_report(hdev, report);

	if (WACOM_PAD_FIELD(field)) {

		wacom_wac_pad_battery_report(hdev, report);

		if (wacom->wacom_wac.pad_input)

			wacom_wac_pad_report(hdev, report);

	} else 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)

		return wacom_wac_finger_report(hdev, report);

		wacom_wac_finger_report(hdev, report);

}



static int wacom_bpt_touch(struct wacom_wac *wacom)

drivers/hid/wacom_wac.h

+1 −0
Original line number Diff line number Diff line
@@ -232,6 +232,7 @@ struct wacom_features { 
	int pktlen;

	bool check_for_hid_type;

	int hid_type;

	bool input_event_flag;

};



struct wacom_shared {