usb: disable status event debouncing

commit 727cb798e17287c61c8253d190df6008b590eb01
Author: Christian Soffke <[email protected]>
Date:   Mon May 18 18:42:58 2026 +0200

    usb: disable status event debouncing
    
    commit 3307b04 didn't fully get rid of the PANICs observed on the
    Fiio M3K after adding a debounce interval for USB status by event
    in e75a3fb, so this reverts to the previous behavior
    
    Change-Id: I42b45a545eb1e26fa3ae3150504712079678f96e

diff --git a/firmware/usb.c b/firmware/usb.c
index 406a635140..bcc8bca9ed 100644
--- a/firmware/usb.c
+++ b/firmware/usb.c
@@ -565,6 +565,7 @@ void usb_charger_update(void)
 #endif
 
 #ifdef USB_STATUS_BY_EVENT
+#if 0 /* usb_dw_gonak_effective: failed! PANIC */
 static int usb_status_tmo_callback(struct timeout* tmo)
 {
     if(usb_monitor_enabled)
@@ -586,11 +587,14 @@ static int usb_status_tmo_callback(struct timeout* tmo)
 
     return 0;
 }
+#endif
 
 void usb_status_event(int current_status)
 {
+#if 0 /* usb_dw_gonak_effective: failed! PANIC */
     static struct timeout tmo;
     static int last_status = USB_EXTRACTED;
+#endif
 
     /* Caller isn't expected to filter for changes in status.
      * current_status:
@@ -599,9 +603,14 @@ void usb_status_event(int current_status)
     if(usb_monitor_enabled)
     {
         int oldstatus = disable_irq_save(); /* Dual-use function */
+#if 0 /* usb_dw_gonak_effective: failed! PANIC */
         last_status = current_status;
         timeout_register(&tmo, usb_status_tmo_callback, USB_DEBOUNCE_TIME,
                          (intptr_t)&last_status);
+#else
+        queue_remove_from_head(&usb_queue, current_status);
+        queue_post(&usb_queue, current_status, 0);
+#endif
         restore_irq(oldstatus);
     }
 }
-- 
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