tests/kms_lease: exercise uevent

And make sure we get the LEASE=1 value, indicating a lessee change.

v2: Apparently netlink reading can leak EAGAIN out through
udev_monitor_receive_device. No idea what's going on there, so let's
wrap some duct tape around it.

v3: Lyude reported that we might get a few udev events on startup of
the test. Drain those first.

v4: Use the igt hotplug library functions, they already take care of
all the uevent special cases.

Cc: Lyude Paul <lyude@redhat.com>
Cc: Keith Packard <keithp@keithp.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

1 files changed, 31 insertions, 11 deletions

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 080f90ae..761bb193 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -4015,16 +4015,8 @@ struct udev_monitor *igt_watch_hotplug(void)
 	return mon;
 }
 
-/**
- * igt_hotplug_detected:
- * @mon: A udev monitor initialized with #igt_watch_hotplug
- * @timeout_secs: How long to wait for a hotplug event to occur.
- *
- * Assert that a hotplug event was received since we last checked the monitor.
- *
- * Returns: true if a sysfs hotplug event was received, false if we timed out
- */
-bool igt_hotplug_detected(struct udev_monitor *mon, int timeout_secs)
+static bool event_detected(struct udev_monitor *mon, int timeout_secs,
+			   const char *property)
 {
 	struct udev_device *dev;
 	const char *hotplug_val;
@@ -4042,7 +4034,7 @@ bool igt_hotplug_detected(struct udev_monitor *mon, int timeout_secs)
 	while (!hotplug_received && poll(&fd, 1, timeout_secs * 1000)) {
 		dev = udev_monitor_receive_device(mon);
 
-		hotplug_val = udev_device_get_property_value(dev, "HOTPLUG");
+		hotplug_val = udev_device_get_property_value(dev, property);
 		if (hotplug_val && atoi(hotplug_val) == 1)
 			hotplug_received = true;
 
@@ -4053,6 +4045,34 @@ bool igt_hotplug_detected(struct udev_monitor *mon, int timeout_secs)
 }
 
 /**
+ * igt_hotplug_detected:
+ * @mon: A udev monitor initialized with #igt_watch_hotplug
+ * @timeout_secs: How long to wait for a hotplug event to occur.
+ *
+ * Assert that a hotplug event was received since we last checked the monitor.
+ *
+ * Returns: true if a sysfs hotplug event was received, false if we timed out
+ */
+bool igt_hotplug_detected(struct udev_monitor *mon, int timeout_secs)
+{
+	return event_detected(mon, timeout_secs, "HOTPLUG");
+}
+
+/**
+ * igt_lease_change_detected:
+ * @mon: A udev monitor initialized with #igt_watch_hotplug
+ * @timeout_secs: How long to wait for a lease change event to occur.
+ *
+ * Assert that a lease change event was received since we last checked the monitor.
+ *
+ * Returns: true if a sysfs lease change event was received, false if we timed out
+ */
+bool igt_lease_change_detected(struct udev_monitor *mon, int timeout_secs)
+{
+	return event_detected(mon, timeout_secs, "LEASE");
+}
+
+/**
  * igt_flush_hotplugs:
  * @mon: A udev monitor initialized with #igt_watch_hotplug
  *