[PATCH i-g-t 29/39] tests/vkms_configfs: Test enabling a device without encoders

[José Expósito]

Try to enable a VKMS device without adding encoders and test that it
fails.

Signed-off-by: José Expósito <jose.exposito89 at gmail.com>
---
 tests/vkms/vkms_configfs.c | 42 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/tests/vkms/vkms_configfs.c b/tests/vkms/vkms_configfs.c
index eb6ebfba1..ffbc3b133 100644
--- a/tests/vkms/vkms_configfs.c
+++ b/tests/vkms/vkms_configfs.c
@@ -1144,6 +1144,47 @@ static void test_enable_too_many_crtcs(void)
 	igt_vkms_device_destroy(dev);
 }
 
+/**
+ * SUBTEST: enable-no-encoders
+ * Description: Try to enable a VKMS device without adding encoders and test
+ *              that it fails.
+ */
+
+static void test_enable_no_encoders(void)
+{
+	igt_vkms_t *dev;
+
+	igt_vkms_config_t cfg = {
+		.device_name = __func__,
+		.planes = {
+			{
+				.name = "plane0",
+				.type = DRM_PLANE_TYPE_PRIMARY,
+				.possible_crtcs = { "crtc0" },
+			},
+		},
+		.crtcs = {
+			{ .name = "crtc0" },
+		},
+		.encoders = { {} },
+		.connectors = {
+			{
+				.name = "connector0",
+				.possible_encoders = {},
+			},
+		},
+	};
+
+	dev = igt_vkms_device_create_from_config(&cfg);
+	igt_assert(dev);
+
+	igt_vkms_device_set_enabled(dev, true);
+	igt_assert(!igt_vkms_device_is_enabled(dev));
+	igt_assert(!device_exists(__func__));
+
+	igt_vkms_device_destroy(dev);
+}
+
 igt_main
 {
 	struct {
@@ -1175,6 +1216,7 @@ igt_main
 		{ "enable-plane-no-crtcs", test_enable_plane_no_crtcs },
 		{ "enable-no-crtcs", test_enable_no_crtcs },
 		{ "enable-too-many-crtcs", test_enable_too_many_crtcs },
+		{ "enable-no-encoders", test_enable_no_encoders },
 	};
 
 	igt_fixture {
-- 
2.48.1