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authorJoshua Diamond <josh@windowoffire.com>2021-02-01 19:12:41 -0500
committerGitHub <noreply@github.com>2021-02-02 11:12:41 +1100
commit9a4618b05b9f1093908c2153c719c5eb5d4a79ee (patch)
tree7487e6226c72d2c3d09749d60ce8df18a2c40d59 /tmk_core/protocol/lufa/lufa.c
parent85079d6a2ecfd55d0d33ce32cd1ad137f1c1df55 (diff)
Address wake from sleep instability (#11450)
* resolve race condition between suspend and wake in LUFA * avoid multiple calls to suspend_power_down() / suspend_wakeup_init() * Remove duplicate suspend_power_down_kb() call * pause on wakeup to wait for USB state to settle * need the repeated suspend_power_down() (that's where the sleep is) * more efficient implementation * fine tune the pause after sending wakeup * speculative chibios version of pause-after-wake * make wakeup delay configurable, and adjust value * better location for wakeup delay
Diffstat (limited to 'tmk_core/protocol/lufa/lufa.c')
-rw-r--r--tmk_core/protocol/lufa/lufa.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/tmk_core/protocol/lufa/lufa.c b/tmk_core/protocol/lufa/lufa.c
index 623aa33ff5..74e48222d0 100644
--- a/tmk_core/protocol/lufa/lufa.c
+++ b/tmk_core/protocol/lufa/lufa.c
@@ -435,7 +435,9 @@ void EVENT_USB_Device_Suspend() {
*/
void EVENT_USB_Device_WakeUp() {
print("[W]");
+#if defined(NO_USB_STARTUP_CHECK)
suspend_wakeup_init();
+#endif
#ifdef SLEEP_LED_ENABLE
sleep_led_disable();
@@ -1073,12 +1075,26 @@ int main(void) {
print("Keyboard start.\n");
while (1) {
#if !defined(NO_USB_STARTUP_CHECK)
- while (USB_DeviceState == DEVICE_STATE_Suspended) {
+ if (USB_DeviceState == DEVICE_STATE_Suspended) {
print("[s]");
- suspend_power_down();
- if (USB_Device_RemoteWakeupEnabled && suspend_wakeup_condition()) {
- USB_Device_SendRemoteWakeup();
+ while (USB_DeviceState == DEVICE_STATE_Suspended) {
+ suspend_power_down();
+ if (USB_Device_RemoteWakeupEnabled && suspend_wakeup_condition()) {
+ USB_Device_SendRemoteWakeup();
+ clear_keyboard();
+
+# if USB_SUSPEND_WAKEUP_DELAY > 0
+ // Some hubs, kvm switches, and monitors do
+ // weird things, with USB device state bouncing
+ // around wildly on wakeup, yielding race
+ // conditions that can corrupt the keyboard state.
+ //
+ // Pause for a while to let things settle...
+ wait_ms(USB_SUSPEND_WAKEUP_DELAY);
+# endif
+ }
}
+ suspend_wakeup_init();
}
#endif