HID: playstation: set default DualShock4 BT poll interval to 4ms.

The poll interval for DualShock4 in Bluetooth mode is adjustable
through the main output report. Configure it to 4ms, which is
similar to USB.

Signed-off-by: Roderick Colenbrander <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

Author: Roderick Colenbrander

drivers/hid/hid-playstation.c

@@ -316,6 +316,17 @@ struct dualsense_output_report {
 /* Battery status within batery_status field. */
 #define DS4_BATTERY_STATUS_FULL		11
 
+/* The lower 6 bits of hw_control of the Bluetooth main output report
+ * control the interval at which Dualshock 4 reports data:
+ * 0x00 - 1ms
+ * 0x01 - 1ms
+ * 0x02 - 2ms
+ * 0x3E - 62ms
+ * 0x3F - disabled
+ */
+#define DS4_OUTPUT_HWCTL_BT_POLL_MASK	0x3F
+/* Default to 4ms poll interval, which is same as USB (not adjustable). */
+#define DS4_BT_DEFAULT_POLL_INTERVAL_MS	4
 #define DS4_OUTPUT_HWCTL_CRC32		0x40
 #define DS4_OUTPUT_HWCTL_HID		0x80
 
@@ -348,6 +359,10 @@ struct dualshock4 {
 	uint32_t prev_sensor_timestamp;
 	uint32_t sensor_timestamp_us;
 
+	/* Bluetooth poll interval */
+	bool update_bt_poll_interval;
+	uint8_t bt_poll_interval;
+
 	bool update_rumble;
 	uint8_t motor_left;
 	uint8_t motor_right;
@@ -2010,6 +2025,11 @@ static void dualshock4_output_worker(struct work_struct *work)
 		 */
 		report.bt->hw_control = DS4_OUTPUT_HWCTL_HID | DS4_OUTPUT_HWCTL_CRC32;
 
+		if (ds4->update_bt_poll_interval) {
+			report.bt->hw_control |= ds4->bt_poll_interval;
+			ds4->update_bt_poll_interval = false;
+		}
+
 		crc = crc32_le(0xFFFFFFFF, &seed, 1);
 		crc = ~crc32_le(crc, report.data, report.len - 4);
 
@@ -2241,6 +2261,13 @@ static inline void dualshock4_schedule_work(struct dualshock4 *ds4)
 	spin_unlock_irqrestore(&ds4->base.lock, flags);
 }
 
+static void dualshock4_set_bt_poll_interval(struct dualshock4 *ds4, uint8_t interval)
+{
+	ds4->bt_poll_interval = interval;
+	ds4->update_bt_poll_interval = true;
+	dualshock4_schedule_work(ds4);
+}
+
 /* Set default lightbar color based on player. */
 static void dualshock4_set_default_lightbar_colors(struct dualshock4 *ds4)
 {
@@ -2372,6 +2399,8 @@ static struct ps_device *dualshock4_create(struct hid_device *hdev)
 			goto err;
 	}
 
+	dualshock4_set_bt_poll_interval(ds4, DS4_BT_DEFAULT_POLL_INTERVAL_MS);
+
 	ret = ps_device_set_player_id(ps_dev);
 	if (ret) {
 		hid_err(hdev, "Failed to assign player id for DualShock4: %d\n", ret);