[PATCH i-g-t 31/39] tests/vkms_configfs: Test adding an encoder without possible CRTCs

[José Expósito]

Try to enable a VKMS device with an encoder without possible CRTCs and
test that it fails.

Signed-off-by: José Expósito <jose.exposito89 at gmail.com>
---
 tests/vkms/vkms_configfs.c | 44 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/tests/vkms/vkms_configfs.c b/tests/vkms/vkms_configfs.c
index 8f1f46f90..11ed6dbcb 100644
--- a/tests/vkms/vkms_configfs.c
+++ b/tests/vkms/vkms_configfs.c
@@ -1235,6 +1235,49 @@ static void test_enable_too_many_encoders(void)
 	igt_vkms_device_destroy(dev);
 }
 
+/**
+ * SUBTEST: enable-encoder-no-crtcs
+ * Description: Try to enable a VKMS device with an encoder without possible
+ *              CRTCs and test that it fails.
+ */
+
+static void test_enable_encoder_no_crtcs(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 = {
+			{ .name = "encoder0", .possible_crtcs = {} },
+		},
+		.connectors = {
+			{
+				.name = "connector0",
+				.possible_encoders = { "encoder0" },
+			},
+		},
+	};
+
+	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 {
@@ -1268,6 +1311,7 @@ igt_main
 		{ "enable-too-many-crtcs", test_enable_too_many_crtcs },
 		{ "enable-no-encoders", test_enable_no_encoders },
 		{ "enable-too-many-encoders", test_enable_too_many_encoders },
+		{ "enable-encoder-no-crtcs", test_enable_encoder_no_crtcs },
 	};
 
 	igt_fixture {
-- 
2.48.1