[PATCH i-g-t v2 08/43] lib/vkms: Test plane default values

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

Add a helper to get the plane type and test that the default type is set
when a new plane is created.

Reviewed-by: Louis Chauvet <louis.chauvet@bootlin.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
---
 lib/igt_vkms.c             | 47 ++++++++++++++++++++++++++++++++++++++
 lib/igt_vkms.h             |  3 +++
 tests/vkms/vkms_configfs.c | 21 +++++++++++++++++
 3 files changed, 71 insertions(+)

diff --git a/lib/igt_vkms.c b/lib/igt_vkms.c
index 1f90e1569..6cc9b8afb 100644
--- a/lib/igt_vkms.c
+++ b/lib/igt_vkms.c
@@ -23,6 +23,7 @@
 
 #define VKMS_ROOT_DIR_NAME		"vkms"
 #define VKMS_FILE_ENABLED		"enabled"
+#define VKMS_FILE_PLANE_TYPE		"type"
 
 enum vkms_pipeline_item {
 	VKMS_PIPELINE_ITEM_PLANE,
@@ -132,6 +133,20 @@ static void get_pipeline_item_path(igt_vkms_t *dev,
 	igt_assert(ret >= 0 && ret < len);
 }
 
+static void get_pipeline_item_file_path(igt_vkms_t *dev,
+					enum vkms_pipeline_item item,
+					const char *name, const char *filename,
+					char *path, size_t len)
+{
+	char item_path[PATH_MAX];
+	int ret;
+
+	get_pipeline_item_path(dev, item, name, item_path, sizeof(item_path));
+
+	ret = snprintf(path, len, "%s/%s", item_path, filename);
+	igt_assert(ret >= 0 && ret < len);
+}
+
 static void add_pipeline_item(igt_vkms_t *dev, enum vkms_pipeline_item item,
 			      const char *name)
 {
@@ -195,6 +210,22 @@ void igt_vkms_get_plane_path(igt_vkms_t *dev, const char *name, char *path,
 	get_pipeline_item_path(dev, VKMS_PIPELINE_ITEM_PLANE, name, path, len);
 }
 
+/**
+ * igt_vkms_get_plane_type_path:
+ * @dev: Device containing the plane
+ * @name: Plane name
+ * @path: Output path
+ * @len: Maximum @path length
+ *
+ * Returns the plane "type" file path.
+ */
+void igt_vkms_get_plane_type_path(igt_vkms_t *dev, const char *name, char *path,
+				  size_t len)
+{
+	get_pipeline_item_file_path(dev, VKMS_PIPELINE_ITEM_PLANE, name,
+				    VKMS_FILE_PLANE_TYPE, path, len);
+}
+
 /**
  * igt_vkms_device_create:
  * @name: VKMS device name
@@ -379,3 +410,19 @@ void igt_vkms_device_add_plane(igt_vkms_t *dev, const char *name)
 {
 	add_pipeline_item(dev, VKMS_PIPELINE_ITEM_PLANE, name);
 }
+
+/**
+ * igt_vkms_plane_get_type:
+ * @dev: Device the plane belongs to
+ * @name: Plane name
+ *
+ * Return the plane type.
+ */
+int igt_vkms_plane_get_type(igt_vkms_t *dev, const char *name)
+{
+	char path[PATH_MAX];
+
+	igt_vkms_get_plane_type_path(dev, name, path, sizeof(path));
+
+	return read_int(path);
+}
diff --git a/lib/igt_vkms.h b/lib/igt_vkms.h
index 9062cc42f..cea0c7242 100644
--- a/lib/igt_vkms.h
+++ b/lib/igt_vkms.h
@@ -25,6 +25,8 @@ void igt_require_vkms_configfs(void);
 void igt_vkms_get_device_enabled_path(igt_vkms_t *dev, char *path, size_t len);
 void igt_vkms_get_plane_path(igt_vkms_t *dev, const char *name, char *path,
 			     size_t len);
+void igt_vkms_get_plane_type_path(igt_vkms_t *dev, const char *name, char *path,
+				  size_t len);
 
 igt_vkms_t *igt_vkms_device_create(const char *name);
 void igt_vkms_device_destroy(igt_vkms_t *dev);
@@ -34,5 +36,6 @@ 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);
+int igt_vkms_plane_get_type(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 1ac85d8f9..5aafe39ae 100644
--- a/tests/vkms/vkms_configfs.c
+++ b/tests/vkms/vkms_configfs.c
@@ -211,6 +211,26 @@ static void test_plane_default_files(void)
 	igt_vkms_device_destroy(dev);
 }
 
+/**
+ * SUBTEST: plane-default-values
+ * Description: Check that the default values for the plane are correct.
+ */
+
+static void test_plane_default_values(void)
+{
+	igt_vkms_t *dev;
+
+	dev = igt_vkms_device_create(__func__);
+	igt_assert(dev);
+
+	igt_vkms_device_add_plane(dev, "plane0");
+
+	igt_assert_eq(igt_vkms_plane_get_type(dev, "plane0"),
+		      DRM_PLANE_TYPE_OVERLAY);
+
+	igt_vkms_device_destroy(dev);
+}
+
 igt_main
 {
 	struct {
@@ -221,6 +241,7 @@ igt_main
 		{ "device-default-values", test_device_default_values },
 		{ "device-wrong-values", test_device_wrong_values },
 		{ "plane-default-files", test_plane_default_files },
+		{ "plane-default-values", test_plane_default_values },
 	};
 
 	igt_fixture {
-- 
2.48.1