[PATCH i-g-t 10/39] lib/vkms: Test CRTC default files

["José Expósito" <jose.exposito89@gmail.com>]

Add a helper to create a CRTC and a test checking that the default
files and directories are created.

Signed-off-by: José Expósito <jose.exposito89@gmail.com>
---
 lib/igt_vkms.c             | 12 ++++++++++++
 lib/igt_vkms.h             |  2 ++
 tests/vkms/vkms_configfs.c | 29 +++++++++++++++++++++++++++++
 3 files changed, 43 insertions(+)

diff --git a/lib/igt_vkms.c b/lib/igt_vkms.c
index ca6f37975..a7dad43e2 100644
--- a/lib/igt_vkms.c
+++ b/lib/igt_vkms.c
@@ -365,3 +365,15 @@ void igt_vkms_plane_set_type(igt_vkms_t *dev, const char *name, int type)
 
 	write_int(path, type);
 }
+
+/**
+ * igt_vkms_device_add_crtc:
+ * @dev: Device to add the CRTC to
+ * @name: CRTC name
+ *
+ * Add a new CRTC to the VKMS device.
+ */
+void igt_vkms_device_add_crtc(igt_vkms_t *dev, const char *name)
+{
+	add_pipeline_item(dev, VKMS_PIPELINE_ITEM_CRTC, name);
+}
diff --git a/lib/igt_vkms.h b/lib/igt_vkms.h
index 283be5699..7f70f92d3 100644
--- a/lib/igt_vkms.h
+++ b/lib/igt_vkms.h
@@ -33,4 +33,6 @@ void igt_vkms_device_add_plane(igt_vkms_t *dev, const char *name);
 int igt_vkms_plane_get_type(igt_vkms_t *dev, const char *name);
 void igt_vkms_plane_set_type(igt_vkms_t *dev, const char *name, int type);
 
+void igt_vkms_device_add_crtc(igt_vkms_t *dev, const char *name);
+
 #endif /* __IGT_VKMS_H__ */
diff --git a/tests/vkms/vkms_configfs.c b/tests/vkms/vkms_configfs.c
index d607b1a5a..398232c03 100644
--- a/tests/vkms/vkms_configfs.c
+++ b/tests/vkms/vkms_configfs.c
@@ -272,6 +272,34 @@ static void test_plane_wrong_values(void)
 	igt_vkms_device_destroy(dev);
 }
 
+/**
+ * SUBTEST: crtc-default-files
+ * Description: Test that creating a CRTC creates the default files and
+ *              directories.
+ */
+
+static void test_crtc_default_files(void)
+{
+	igt_vkms_t *dev;
+	char path[PATH_MAX];
+
+	const char *files[] = {
+		"writeback",
+	};
+
+	dev = igt_vkms_device_create(__func__);
+	igt_assert(dev);
+
+	igt_vkms_device_add_crtc(dev, "crtc0");
+
+	snprintf(path, sizeof(path), "%s/crtcs/crtc0", dev->path);
+	assert_default_files(path,
+			     files, ARRAY_SIZE(files),
+			     NULL, 0);
+
+	igt_vkms_device_destroy(dev);
+}
+
 igt_main
 {
 	struct {
@@ -284,6 +312,7 @@ igt_main
 		{ "plane-default-files", test_plane_default_files },
 		{ "plane-default-values", test_plane_default_values },
 		{ "plane-wrong-values", test_plane_wrong_values },
+		{ "crtc-default-files", test_crtc_default_files },
 	};
 
 	igt_fixture {
-- 
2.48.1