lib/igt_kms: Add support for detecting connector events

Currently, the event_detect function checks the property val for
"HOTPLUG" and "LEASE" both of which are set to '1' when these events
are sent.

This cannot be used for detecting connector events such as HDCP event
as connector events are sent along with property to signify which
property of which connector has changed. Connector ID and property id
are provided along with "CONNECTOR" and "PROPERTY" as udev
property-value pairs. Eg. for HDCP, the connector id of the connector
whose hdcp status changed, and the property id of the
‘CONTENT_PROTECTION’ property are sent with uevent.

This patch modifies the event_detect function to check multiple
properties with different expected values. It also adds support to
detect connector event for a given pair of connector and property ids.

v2: Simplified the event_detect conditional statements. (Ram)
    Changed the api name for detecting connnector events. (Anshuman)
    Added check for "HOTPLUG" property value for connector events.
v3: Used ARRAY_SIZE() instead of constants. (Ram)
v4: Rebase

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ramalingam C <ramalingam.c@intel.com>
Acked-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 32a0e4cc..539f6c5a 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -779,6 +779,8 @@ bool igt_hotplug_detected(struct udev_monitor *mon,
 			  int timeout_secs);
 bool igt_lease_change_detected(struct udev_monitor *mon,
 			       int timeout_secs);
+bool igt_connector_event_detected(struct udev_monitor *mon, uint32_t conn_id,
+				  uint32_t prop_id, int timeout_msecs);
 void igt_flush_hotplugs(struct udev_monitor *mon);
 void igt_cleanup_hotplug(struct udev_monitor *mon);