tests: Add test for tv load detection

The test is that kernel load detection works as intended,
and doesn't cause any vblank spam.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Tested-by: Lyude <cpaul@redhat.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/tests/kms_tv_load_detect.c b/tests/kms_tv_load_detect.c
new file mode 100644
index 00000000..5684b267
--- /dev/null
+++ b/tests/kms_tv_load_detect.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "igt.h"
+
+IGT_TEST_DESCRIPTION("Check tv load detection works correctly.");
+
+int main(int argc, char **argv)
+{
+	/* force the VGA output and test that it worked */
+	int drm_fd = 0;
+	drmModeRes *res;
+	drmModeConnector *tv_connector = NULL, *temp;
+
+	igt_subtest_init(argc, argv);
+
+	igt_fixture {
+		drm_fd = drm_open_driver_master(DRIVER_INTEL);
+		res = drmModeGetResources(drm_fd);
+		igt_assert(res);
+
+		/* find the TV connector */
+		for (int i = 0; i < res->count_connectors; i++) {
+
+			tv_connector = drmModeGetConnectorCurrent(drm_fd,
+								   res->connectors[i]);
+
+			if (tv_connector->connector_type == DRM_MODE_CONNECTOR_SVIDEO) {
+				if (kmstest_get_property(drm_fd, tv_connector->connector_id,
+							 DRM_MODE_OBJECT_CONNECTOR, "mode", NULL, NULL, NULL))
+					break;
+
+				igt_info("Skipping tv output \"%s-%d\": No tv \"mode\" property found\n",
+					 kmstest_connector_type_str(tv_connector->connector_type),
+					 tv_connector->connector_type_id);
+			}
+
+			drmModeFreeConnector(tv_connector);
+
+			tv_connector = NULL;
+		}
+
+		igt_require(tv_connector);
+	}
+
+	igt_subtest("load-detect") {
+		/*
+		 * disable all outputs to make sure we have a
+		 * free crtc available for load detect
+		 */
+		kmstest_set_vt_graphics_mode();
+		kmstest_unset_all_crtcs(drm_fd, res);
+
+		/* This can't use drmModeGetConnectorCurrent
+		 * because connector probing is the point of this test.
+		 */
+		temp = drmModeGetConnector(drm_fd, tv_connector->connector_id);
+
+		igt_assert(temp->connection != DRM_MODE_UNKNOWNCONNECTION);
+
+		drmModeFreeConnector(temp);
+	}
+
+	igt_fixture {
+		drmModeFreeConnector(tv_connector);
+		close(drm_fd);
+	}
+
+	igt_exit();
+}