From 99a18a64957ab84ff0f43fd51a1b048a4ebc049c Mon Sep 17 00:00:00 2001
From: "Enrico Weigelt, metux IT consult" <info@metux.net>
Date: Thu, 26 Jun 2025 12:01:06 +0200
Subject: [PATCH] xfree86: compat: re-add TimeCheck() for proprietary nvidia
 driver

Yet another very internal function that the proprietary Nvidia driver
is using for unknown reasons.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
---
 hw/xfree86/compat/meson.build  |  1 +
 hw/xfree86/compat/timercheck.c | 23 +++++++++++++++++++++++
 os/WaitFor.c                   |  4 +---
 os/osdep.h                     |  3 +++
 4 files changed, 28 insertions(+), 3 deletions(-)
 create mode 100644 hw/xfree86/compat/timercheck.c

diff --git a/hw/xfree86/compat/meson.build b/hw/xfree86/compat/meson.build
index b3835efdc..ea64e7f0e 100644
--- a/hw/xfree86/compat/meson.build
+++ b/hw/xfree86/compat/meson.build
@@ -3,6 +3,7 @@ srcs_xorg_compat = [
     'log.c',
     'nvidiabug.c',
     'ones.c',
+    'timercheck.c',
     'xf86Helper.c',
 ]
 
diff --git a/hw/xfree86/compat/timercheck.c b/hw/xfree86/compat/timercheck.c
new file mode 100644
index 000000000..a434e5685
--- /dev/null
+++ b/hw/xfree86/compat/timercheck.c
@@ -0,0 +1,23 @@
+#include <dix-config.h>
+
+#include <X11/Xfuncproto.h>
+
+#include "os/osdep.h"
+
+#include "xf86_compat.h"
+
+/*
+ * needed for NVidia proprietary driver 570.x and 575.x version
+ * force the server to see if any timer callbacks should be called
+ *
+ * this function had been obsolete and removed long ago, but NVidia folks
+ * still didn't do basic maintenance and fixed their driver
+ */
+
+_X_EXPORT void TimerCheck(void);
+
+void TimerCheck(void) {
+    xf86NVidiaBugObsoleteFunc("TimerCheck()");
+
+    DoTimers(GetTimeInMillis());
+}
diff --git a/os/WaitFor.c b/os/WaitFor.c
index 973a3495d..32b9b5b03 100644
--- a/os/WaitFor.c
+++ b/os/WaitFor.c
@@ -105,7 +105,6 @@ struct _OsTimerRec {
 };
 
 static void DoTimer(OsTimerPtr timer, CARD32 now);
-static void DoTimers(CARD32 now);
 static void CheckAllTimers(void);
 static volatile struct xorg_list timers;
 
@@ -276,8 +275,7 @@ DoTimer(OsTimerPtr timer, CARD32 now)
         TimerSet(timer, 0, newTime, timer->callback, timer->arg);
 }
 
-static void
-DoTimers(CARD32 now)
+void DoTimers(CARD32 now)
 {
     OsTimerPtr  timer;
 
diff --git a/os/osdep.h b/os/osdep.h
index ff41f2482..bf3c00f3b 100644
--- a/os/osdep.h
+++ b/os/osdep.h
@@ -225,4 +225,7 @@ Ones(unsigned long mask)
 
 #define LIMITCLIENTS     256     /* Must be a power of 2 and <= MAXCLIENTS */
 
+/* run timers that are expired at timestamp `now` */
+void DoTimers(CARD32 now);
+
 #endif                          /* _OSDEP_H_ */