[PATCH i-g-t 07/39] lib/vkms: Test plane default files

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

Add a helper to create a plane 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             | 52 ++++++++++++++++++++++++++++++++++++++
 lib/igt_vkms.h             |  2 ++
 tests/vkms/vkms_configfs.c | 33 ++++++++++++++++++++++++
 3 files changed, 87 insertions(+)

diff --git a/lib/igt_vkms.c b/lib/igt_vkms.c
index 1fdfb09f7..a7b395a71 100644
--- a/lib/igt_vkms.c
+++ b/lib/igt_vkms.c
@@ -24,6 +24,13 @@
 #define VKMS_ROOT_DIR_NAME		"vkms"
 #define VKMS_FILE_ENABLED		"enabled"
 
+enum vkms_pipeline_item {
+	VKMS_PIPELINE_ITEM_PLANE,
+	VKMS_PIPELINE_ITEM_CRTC,
+	VKMS_PIPELINE_ITEM_ENCODER,
+	VKMS_PIPELINE_ITEM_CONNECTOR,
+};
+
 /**
  * SECTION:igt_vkms
  * @short_description: Helpers to create and configure VKMS devices
@@ -93,6 +100,39 @@ static void write_bool(const char *path, bool value)
 	write_int(path, value ? 1 : 0);
 }
 
+static const char *get_pipeline_item_dir_name(enum vkms_pipeline_item item)
+{
+	switch (item) {
+	case VKMS_PIPELINE_ITEM_PLANE:
+		return "planes";
+	case VKMS_PIPELINE_ITEM_CRTC:
+		return "crtcs";
+	case VKMS_PIPELINE_ITEM_ENCODER:
+		return "encoders";
+	case VKMS_PIPELINE_ITEM_CONNECTOR:
+		return "connectors";
+	}
+
+	igt_assert(!"Cannot be reached: Unknown VKMS pipeline item type");
+}
+
+static void add_pipeline_item(igt_vkms_t *dev, enum vkms_pipeline_item item,
+			      const char *name)
+{
+	const char *item_dir_name;
+	char path[PATH_MAX];
+	int ret;
+
+	item_dir_name = get_pipeline_item_dir_name(item);
+	snprintf(path, sizeof(path), "%s/%s/%s", dev->path, item_dir_name,
+		 name);
+
+	ret = mkdir(path, 0777);
+	igt_assert_f(ret == 0,
+		     "Unable to mkdir directory '%s'. Got errno=%d (%s)\n",
+		     path, errno, strerror(errno));
+}
+
 /**
  * igt_require_vkms_configfs:
  *
@@ -269,3 +309,15 @@ void igt_vkms_device_set_enabled(igt_vkms_t *dev, bool enabled)
 
 	write_bool(path, enabled);
 }
+
+/**
+ * igt_vkms_device_add_plane:
+ * @dev: Device to add the plane to
+ * @name: Plane name
+ *
+ * Add a new plane to the VKMS device.
+ */
+void igt_vkms_device_add_plane(igt_vkms_t *dev, const char *name)
+{
+	add_pipeline_item(dev, VKMS_PIPELINE_ITEM_PLANE, name);
+}
diff --git a/lib/igt_vkms.h b/lib/igt_vkms.h
index dab51852a..9e16ae7eb 100644
--- a/lib/igt_vkms.h
+++ b/lib/igt_vkms.h
@@ -29,4 +29,6 @@ void igt_vkms_destroy_all_devices(void);
 bool igt_vkms_device_is_enabled(igt_vkms_t *dev);
 void igt_vkms_device_set_enabled(igt_vkms_t *dev, bool enabled);
 
+void igt_vkms_device_add_plane(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 79023359a..ec334641f 100644
--- a/tests/vkms/vkms_configfs.c
+++ b/tests/vkms/vkms_configfs.c
@@ -170,6 +170,38 @@ static void test_device_wrong_values(void)
 	igt_vkms_device_destroy(dev);
 }
 
+/**
+ * SUBTEST: plane-default-files
+ * Description: Test that creating a plane creates the default files and
+ *              directories.
+ */
+
+static void test_plane_default_files(void)
+{
+	igt_vkms_t *dev;
+	char path[PATH_MAX];
+
+	const char *files[] = {
+		"type",
+	};
+
+	const char *dirs[] = {
+		"possible_crtcs",
+	};
+
+	dev = igt_vkms_device_create(__func__);
+	igt_assert(dev);
+
+	igt_vkms_device_add_plane(dev, "plane0");
+
+	snprintf(path, sizeof(path), "%s/planes/plane0", dev->path);
+	assert_default_files(path,
+			     files, ARRAY_SIZE(files),
+			     dirs, ARRAY_SIZE(dirs));
+
+	igt_vkms_device_destroy(dev);
+}
+
 igt_main
 {
 	struct {
@@ -179,6 +211,7 @@ igt_main
 		{ "device-default-files", test_device_default_files },
 		{ "device-default-values", test_device_default_values },
 		{ "device-wrong-values", test_device_wrong_values },
+		{ "plane-default-files", test_plane_default_files },
 	};
 
 	igt_fixture {
-- 
2.48.1