[PATCH i-g-t v3] tests/chamelium: Add common suspend and hibernate tests for DP and HDMI

[Paul Kocialkowski <paul.kocialkowski@linux.intel.com>]

This adds two new tests: common-hpd-after-suspend and
common-hpd-after-hibernate that are aimed at testing HPD change during
suspend/hibernate for both DP and HDMI, at the same time.

The interest in bringing this test up is to reduce the time spent in
testing, with the downside of less precision regarding the test's
outcome. The per-connector tests are still available to get a more
precise idea of which connector causes a failure, when that happens.

VGA is explicitly excluded from this test as there is currently no
way of doing delayed hpd pulses for it.

The generic hpd suspend/resume test code is split in a dedicated
function, that allow testing one or all possible ports.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@linux.intel.com>
---
 tests/chamelium.c | 118 +++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 100 insertions(+), 18 deletions(-)

diff --git a/tests/chamelium.c b/tests/chamelium.c
index 76b14e95..3cf9f3b5 100644
--- a/tests/chamelium.c
+++ b/tests/chamelium.c
@@ -143,8 +143,18 @@ wait_for_connector(data_t *data, struct chamelium_port *port,
 static void
 reset_state(data_t *data, struct chamelium_port *port)
 {
+	int p;
+
 	chamelium_reset(data->chamelium);
-	wait_for_connector(data, port, DRM_MODE_DISCONNECTED);
+
+	if (port) {
+		wait_for_connector(data, port, DRM_MODE_DISCONNECTED);
+	} else {
+		for (p = 0; p < data->port_count; p++) {
+			port = data->ports[p];
+			wait_for_connector(data, port, DRM_MODE_DISCONNECTED);
+		}
+	}
 }
 
 static void
@@ -206,36 +216,96 @@ test_edid_read(data_t *data, struct chamelium_port *port,
 }
 
 static void
-test_suspend_resume_hpd(data_t *data, struct chamelium_port *port,
-			enum igt_suspend_state state,
-			enum igt_suspend_test test)
+try_suspend_resume_hpd(data_t *data, struct chamelium_port *port,
+		       enum igt_suspend_state state, enum igt_suspend_test test,
+		       struct udev_monitor *mon, bool connected)
 {
-	struct udev_monitor *mon = igt_watch_hotplug();
-
-	reset_state(data, port);
+	int p;
 
 	igt_set_autoresume_delay(SUSPEND_RESUME_DELAY);
 	igt_flush_hotplugs(mon);
 
-	/* Make sure we notice new connectors after resuming */
-	chamelium_async_hpd_pulse_start(data->chamelium, port, false,
-					SUSPEND_RESUME_DELAY / 2);
+	if (port) {
+		chamelium_async_hpd_pulse_start(data->chamelium, port,
+						connected,
+						SUSPEND_RESUME_DELAY / 2);
+	} else {
+		for (p = 0; p < data->port_count; p++) {
+			port = data->ports[p];
+			if (chamelium_port_get_type(port) == DRM_MODE_CONNECTOR_VGA)
+				continue;
+
+			chamelium_async_hpd_pulse_start(data->chamelium, port,
+							connected,
+							SUSPEND_RESUME_DELAY / 2);
+		}
+
+		port = NULL;
+	}
+
 	igt_system_suspend_autoresume(state, test);
 	chamelium_async_hpd_pulse_finish(data->chamelium);
 
 	igt_assert(igt_hotplug_detected(mon, HOTPLUG_TIMEOUT));
-	igt_assert_eq(reprobe_connector(data, port), DRM_MODE_CONNECTED);
+	if (port) {
+		igt_assert_eq(reprobe_connector(data, port), connected ?
+			      DRM_MODE_DISCONNECTED : DRM_MODE_CONNECTED);
+	} else {
+		for (p = 0; p < data->port_count; p++) {
+			port = data->ports[p];
+			if (chamelium_port_get_type(port) == DRM_MODE_CONNECTOR_VGA)
+				continue;
+
+			igt_assert_eq(reprobe_connector(data, port), connected ?
+				      DRM_MODE_DISCONNECTED :
+				      DRM_MODE_CONNECTED);
+		}
 
-	igt_flush_hotplugs(mon);
+		port = NULL;
+	}
+}
+
+static void
+test_suspend_resume_hpd(data_t *data, struct chamelium_port *port,
+			enum igt_suspend_state state,
+			enum igt_suspend_test test)
+{
+	struct udev_monitor *mon = igt_watch_hotplug();
+
+	reset_state(data, port);
+
+	/* Make sure we notice new connectors after resuming */
+	try_suspend_resume_hpd(data, port, state, test, mon, false);
 
 	/* Now make sure we notice disconnected connectors after resuming */
-	chamelium_async_hpd_pulse_start(data->chamelium, port, true,
-					SUSPEND_RESUME_DELAY / 2);
-	igt_system_suspend_autoresume(state, test);
-	chamelium_async_hpd_pulse_finish(data->chamelium);
+	try_suspend_resume_hpd(data, port, state, test, mon, true);
 
-	igt_assert(igt_hotplug_detected(mon, HOTPLUG_TIMEOUT));
-	igt_assert_eq(reprobe_connector(data, port), DRM_MODE_DISCONNECTED);
+	igt_cleanup_hotplug(mon);
+}
+
+static void
+test_suspend_resume_hpd_common(data_t *data, enum igt_suspend_state state,
+			       enum igt_suspend_test test)
+{
+	struct udev_monitor *mon = igt_watch_hotplug();
+	struct chamelium_port *port;
+	int p;
+
+	for (p = 0; p < data->port_count; p++) {
+		port = data->ports[p];
+		if (chamelium_port_get_type(port) == DRM_MODE_CONNECTOR_VGA)
+			continue;
+
+		igt_debug("Testing port %s\n", chamelium_port_get_name(port));
+	}
+
+	reset_state(data, NULL);
+
+	/* Make sure we notice new connectors after resuming */
+	try_suspend_resume_hpd(data, NULL, state, test, mon, false);
+
+	/* Now make sure we notice disconnected connectors after resuming */
+	try_suspend_resume_hpd(data, NULL, state, test, mon, true);
 
 	igt_cleanup_hotplug(mon);
 }
@@ -750,6 +820,18 @@ igt_main
 			test_hpd_without_ddc(&data, port);
 	}
 
+	igt_subtest_group {
+		igt_subtest("common-hpd-after-suspend")
+			test_suspend_resume_hpd_common(&data,
+						       SUSPEND_STATE_MEM,
+						       SUSPEND_TEST_NONE);
+
+		igt_subtest("common-hpd-after-hibernate")
+			test_suspend_resume_hpd_common(&data,
+						       SUSPEND_STATE_DISK,
+						       SUSPEND_TEST_DEVICES);
+	}
+
 	igt_fixture {
 		close(data.drm_fd);
 	}
-- 
2.13.1

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