[igt-dev] [i-g-t 1/2] tests/kms_feature_discovery: Fix display subtest

[Bhanuprakash Modem <bhanuprakash.modem@intel.com>]

Instead of doing nothing, check the connected platform really
supports the display or not.

Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
---
 tests/kms_feature_discovery.c | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/tests/kms_feature_discovery.c b/tests/kms_feature_discovery.c
index 428f97ffe..81064aa0e 100644
--- a/tests/kms_feature_discovery.c
+++ b/tests/kms_feature_discovery.c
@@ -30,8 +30,7 @@
  *		anything else means we have a serious problem.
  *
  * SUBTEST: display
- * Description: Make sure that we have display support with
- * 		some outputs connected.
+ * Description: Make sure that we have display support.
  * Driver requirement: i915, xe
  * Functionality: feature_discovery
  * Mega feature: General Display Features
@@ -97,18 +96,25 @@ igt_main {
 	igt_fixture {
 		fd = drm_open_driver_master(DRIVER_ANY);
 		debugfs_fd = igt_debugfs_dir(fd);
+
+		errno = 0;
 	}
 
 	igt_subtest_group {
-		igt_fixture {
-			igt_display_require(&display, fd);
-		}
-
-		igt_describe("Make sure that we have display support with some outputs connected.");
+		igt_describe("Make sure that we have display support.");
 		igt_subtest("display") {
-			/* will skip because of the fixture */
+			drmModeResPtr resources = drmModeGetResources(fd);
+
+			/* Operation not supported on non-display platforms. */
+			if (!resources)
+				igt_assert_eq(errno, EOPNOTSUPP);
+
+			drmModeFreeResources(resources);
 		}
 
+		igt_fixture
+			igt_display_require(&display, fd);
+
 		igt_subtest_group {
 			volatile int output_count = 0;
 			igt_output_t *output;
-- 
2.40.0