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Commit ddd2866b authored by Rohit Bandi's avatar Rohit Bandi Committed by Gerrit - the friendly Code Review server
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HID: qvr: wait event interruptible timeout change 



To improve read calibration data latency use a minimum
but enough timeout value. To improve consistency in
controlling IMU stream use a different value.

Change-Id: Iff196d055f0202e642de218020605f7797e3ae4a
Signed-off-by: default avatarRohit Bandi <rohitbandi@codeaurora.org>
parent 7d63f01f

drivers/hid/hid-qvr.c

+5 −4
Original line number Diff line number Diff line
@@ -46,7 +46,8 @@ 
#include "hid-qvr.h"

#include "hid-trace.h"



#define WAIT_EVENT_INT_TOUT 20

#define TIME_OUT_START_STOP_MS 500

#define TIME_OUT_READ_WRITE_MS 20



#define QVR_START_IMU		_IO('q', 1)

#define QVR_STOP_IMU		_IO('q', 2)
@@ -128,7 +129,7 @@ static int read_calibration_len(void) 


	ret = wait_event_interruptible_timeout(wq,

		sensor->calib_data_len != -1,

		msecs_to_jiffies(WAIT_EVENT_INT_TOUT));

		msecs_to_jiffies(TIME_OUT_READ_WRITE_MS));

	if (ret == 0) {

		kfree(hid_buf);

		return -ETIME;
@@ -173,7 +174,7 @@ static uint8_t *read_calibration_data(void) 
			HID_REQ_SET_REPORT);

		ret = wait_event_interruptible_timeout(wq,

			sensor->calib_data_recv == 1,

			msecs_to_jiffies(WAIT_EVENT_INT_TOUT));

			msecs_to_jiffies(TIME_OUT_READ_WRITE_MS));

		if (ret == 0) {

			pr_err("%s:get calibration data timeout\n", __func__);

			kfree(hid_buf);
@@ -221,7 +222,7 @@ static int control_imu_stream(bool status) 
		HID_FEATURE_REPORT,

		HID_REQ_SET_REPORT);

	ret = wait_event_interruptible_timeout(wq, sensor->ext_ack == 1,

		msecs_to_jiffies(WAIT_EVENT_INT_TOUT));

		msecs_to_jiffies(TIME_OUT_START_STOP_MS));

	if (!ret && status) {

		pr_debug("qvr: falling back - start IMU stream failed\n");

		hid_buf[0] = QVR_HID_REPORT_ID_CAL;