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Commit 80786eb9 authored by Roderick Colenbrander's avatar Roderick Colenbrander Committed by Jiri Kosina
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HID: sony: Report hardware timestamp for DS4 sensor values 



Report the hardware timestamp inside each HID report through
MSC_TIMESTAMP for motion sensor values.

Signed-off-by: default avatarRoderick Colenbrander <roderick.colenbrander@sony.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 55a07d62

drivers/hid/hid-sony.c

+27 −0
Original line number Diff line number Diff line
@@ -781,6 +781,7 @@ struct motion_output_report_02 { 
 * additional +2.

 */

#define DS4_INPUT_REPORT_BUTTON_OFFSET    5

#define DS4_INPUT_REPORT_TIMESTAMP_OFFSET 10

#define DS4_INPUT_REPORT_GYRO_X_OFFSET   13

#define DS4_INPUT_REPORT_BATTERY_OFFSET  30

#define DS4_INPUT_REPORT_TOUCHPAD_OFFSET 33
@@ -837,6 +838,11 @@ struct sony_sc { 
	u8 led_delay_on[MAX_LEDS];

	u8 led_delay_off[MAX_LEDS];

	u8 led_count;



	bool timestamp_initialized;

	u16 prev_timestamp;

	unsigned int timestamp_us;



	bool ds4_dongle_connected;

	/* DS4 calibration data */

	struct ds4_calibration_data ds4_calib_data[6];
@@ -1031,6 +1037,7 @@ static void dualshock4_parse_report(struct sony_sc *sc, u8 *rd, int size) 
	unsigned long flags;

	int n, m, offset, num_touch_data, max_touch_data;

	u8 cable_state, battery_capacity, battery_charging;

	u16 timestamp;



	/* When using Bluetooth the header is 2 bytes longer, so skip these. */

	int data_offset = (sc->quirks & DUALSHOCK4_CONTROLLER_USB) ? 0 : 2;
@@ -1039,6 +1046,24 @@ static void dualshock4_parse_report(struct sony_sc *sc, u8 *rd, int size) 
	offset = data_offset + DS4_INPUT_REPORT_BUTTON_OFFSET;

	input_report_key(sc->touchpad, BTN_LEFT, rd[offset+2] & 0x2);



	/* Convert timestamp (in 5.33us unit) to timestamp_us */

	offset = data_offset + DS4_INPUT_REPORT_TIMESTAMP_OFFSET;

	timestamp = get_unaligned_le16(&rd[offset]);

	if (!sc->timestamp_initialized) {

		sc->timestamp_us = ((unsigned int)timestamp * 16) / 3;

		sc->timestamp_initialized = true;

	} else {

		u16 delta;



		if (sc->prev_timestamp > timestamp)

			delta = (U16_MAX - sc->prev_timestamp + timestamp + 1);

		else

			delta = timestamp - sc->prev_timestamp;

		sc->timestamp_us += (delta * 16) / 3;

	}

	sc->prev_timestamp = timestamp;

	input_event(sc->sensor_dev, EV_MSC, MSC_TIMESTAMP, sc->timestamp_us);



	offset = data_offset + DS4_INPUT_REPORT_GYRO_X_OFFSET;

	for (n = 0; n < 6; n++) {

		/* Store data in int for more precision during mult_frac. */
@@ -1385,6 +1410,8 @@ static int sony_register_sensors(struct sony_sc *sc) 
	input_abs_set_res(sc->sensor_dev, ABS_RY, DS4_GYRO_RES_PER_DEG_S);

	input_abs_set_res(sc->sensor_dev, ABS_RZ, DS4_GYRO_RES_PER_DEG_S);



	__set_bit(EV_MSC, sc->sensor_dev->evbit);

	__set_bit(MSC_TIMESTAMP, sc->sensor_dev->mscbit);

	__set_bit(INPUT_PROP_ACCELEROMETER, sc->sensor_dev->propbit);



	ret = input_register_device(sc->sensor_dev);