The receiver can send HID++ notifications to the DJ devices when the
physical devices are connected/disconnected.
Enable this feature by default.
This command uses a HID++ command instead of a DJ one, so use a direct
call to usbhid instead of using logi_dj_recv_send_report()
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
---
drivers/hid/hid-logitech-dj.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c
index 9bc3942..c917ab6 100644
--- a/drivers/hid/hid-logitech-dj.c
+++ b/drivers/hid/hid-logitech-dj.c
@@ -630,7 +630,9 @@ static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev)
static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev,
unsigned timeout)
{
+ struct hid_device *hdev = djrcv_dev->hdev;
struct dj_report *dj_report;
+ u8 *buf;
int retval;
dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL);
@@ -642,7 +644,6 @@ static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev,
dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F;
dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] = (u8)timeout;
retval = logi_dj_recv_send_report(djrcv_dev, dj_report);
- kfree(dj_report);
/*
* Ugly sleep to work around a USB 3.0 bug when the receiver is still
@@ -651,6 +652,30 @@ static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev,
*/
msleep(50);
+ /*
+ * Magical bits to set up hidpp notifications when the dj devices
+ * are connected/disconnected.
+ *
+ * We can reuse dj_report because HIDPP_REPORT_SHORT_LENGTH is smaller
+ * than DJREPORT_SHORT_LENGTH.
+ */
+ buf = (u8 *)dj_report;
+
+ memset(buf, 0, HIDPP_REPORT_SHORT_LENGTH);
+
+ buf[0] = REPORT_ID_HIDPP_SHORT;
+ buf[1] = 0xFF;
+ buf[2] = 0x80;
+ buf[3] = 0x00;
+ buf[4] = 0x00;
+ buf[5] = 0x09;
+ buf[6] = 0x00;
+
+ hid_hw_raw_request(hdev, REPORT_ID_HIDPP_SHORT, buf,
+ HIDPP_REPORT_SHORT_LENGTH, HID_OUTPUT_REPORT,
+ HID_REQ_SET_REPORT);
+
+ kfree(dj_report);
return retval;
}
--
2.1.0
--
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