From 75d8f87b40aaefc8fb8595b73ad5aa4b98c43de8 Mon Sep 17 00:00:00 2001
From: kenji <kenji@kkozai.com>
Date: Fri, 8 May 2026 11:40:49 -0400
Subject: [PATCH] suppress hid events from host when device is disconnected

---
 hyperx_elite2.c | 10 +++++++---
 usb_device.c    | 18 ++++++++++--------
 2 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/hyperx_elite2.c b/hyperx_elite2.c
index e225b08..35e25ca 100644
--- a/hyperx_elite2.c
+++ b/hyperx_elite2.c
@@ -360,11 +360,15 @@ void startADC() {
 
 // forward HID report after processing
 bool forward_report(uint8_t instance, uint8_t const* report, uint16_t len) {
-	if (instance == 0x01 && report[0] == 0x03 && report[1] == 0xE2) {
-		mute = !mute;
+	if (device_state == DEVICE_ACTIVE ) {
+		if (instance == 0x01 && report[0] == 0x03 && report[1] == 0xE2) {
+			mute = !mute;
+		}
+
+		return tud_hid_n_report(instance, 0, report, len);
 	}
 
-	return tud_hid_n_report(instance, 0, report, len);
+	return true;
 }
 
 // save RGB configuration to flash
diff --git a/usb_device.c b/usb_device.c
index cc267a3..17040c2 100644
--- a/usb_device.c
+++ b/usb_device.c
@@ -75,19 +75,17 @@ void usb_device_main(void) {
 	while (true) {
 		switch ( device_state ) {
 			case DEVICE_ACTIVE:
+				if (!tud_mounted()) {
+					device_state = DEVICE_INACTIVE;
+				}
 				break;
 			case DEVICE_INACTIVE:
 				break;
 			case DEVICE_RESTART:
 				if (tud_disconnect()) {
+					device_state = DEVICE_INACTIVE;
 					sleep_ms(10);
-					if (tud_connect()) {
-						if ( host_state == HOST_INACTIVE ) {
-							device_state = DEVICE_INACTIVE;
-						} else {
-							device_state = DEVICE_ACTIVE;
-						}
-					}
+					tud_connect();
 				}
 				break;
 			default:
@@ -214,7 +212,6 @@ uint8_t const * tud_hid_descriptor_report_cb(uint8_t itf)
 	return NULL;
 }
 
-
 // Invoked when received SET_REPORT control request or
 // received data on OUT endpoint ( Report ID = 0, Type = 0 )
 void tud_hid_set_report_cb(uint8_t instance, uint8_t report_id, hid_report_type_t report_type, uint8_t const* buffer, uint16_t bufsize) {
@@ -238,6 +235,11 @@ uint16_t tud_hid_get_report_cb(uint8_t instance, uint8_t report_id, hid_report_t
 	return 0;
 }
 
+// Invoked when device is mounted
+void tud_mount_cb(void) {
+	device_state = DEVICE_ACTIVE;
+}
+
 // print message to CDC in raw hex
 void cdc_print_hex(uint8_t const* msg, uint16_t msg_len) {
 	(void) msg;