[PATCH RFC 15/15] drm/vkms: Add test for config structure

[Louis Chauvet]

The config structure is a bit complex in term of memory management. Add
basic test to avoid breaking it in the future.

Signed-off-by: Louis Chauvet <louis.chauvet at bootlin.com>
---
 drivers/gpu/drm/vkms/tests/Makefile           |   1 +
 drivers/gpu/drm/vkms/tests/vkms_config_test.c | 135 ++++++++++++++++++++++++++
 2 files changed, 136 insertions(+)

diff --git a/drivers/gpu/drm/vkms/tests/Makefile b/drivers/gpu/drm/vkms/tests/Makefile
index 2d1df668569e..ec71b5fe7f9d 100644
--- a/drivers/gpu/drm/vkms/tests/Makefile
+++ b/drivers/gpu/drm/vkms/tests/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 obj-$(CONFIG_DRM_VKMS_KUNIT_TESTS) += vkms_format_test.o
+obj-$(CONFIG_DRM_VKMS_KUNIT_TESTS) += vkms_config_test.o
diff --git a/drivers/gpu/drm/vkms/tests/vkms_config_test.c b/drivers/gpu/drm/vkms/tests/vkms_config_test.c
new file mode 100644
index 000000000000..6ec0021a8df3
--- /dev/null
+++ b/drivers/gpu/drm/vkms/tests/vkms_config_test.c
@@ -0,0 +1,135 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <kunit/test.h>
+
+#include "../vkms_config.h"
+
+static void vkms_config_test_basic_allocation(struct kunit *test)
+{
+	struct vkms_config *config = vkms_config_create();
+
+	KUNIT_EXPECT_TRUE_MSG(test, list_empty(&config->encoders),
+			      "Encoder list is not empty after allocation");
+	KUNIT_EXPECT_TRUE_MSG(test, list_empty(&config->crtcs),
+			      "CRTC list is not empty after allocation");
+	KUNIT_EXPECT_TRUE_MSG(test, list_empty(&config->planes),
+			      "Plane list is not empty after allocation");
+
+	vkms_config_destroy(config);
+}
+
+static void vkms_config_test_simple_config(struct kunit *test)
+{
+	struct vkms_config *config = vkms_config_create();
+
+	struct vkms_config_plane *plane_1 = vkms_config_create_plane(config);
+	struct vkms_config_plane *plane_2 = vkms_config_create_plane(config);
+	struct vkms_config_crtc *crtc = vkms_config_create_crtc(config);
+	struct vkms_config_encoder *encoder = vkms_config_create_encoder(config);
+
+	KUNIT_EXPECT_FALSE(test, vkms_config_is_valid(config));
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->planes), 2);
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->crtcs), 1);
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->encoders), 1);
+
+	plane_1->type = DRM_PLANE_TYPE_PRIMARY;
+	plane_2->type = DRM_PLANE_TYPE_CURSOR;
+
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_1, crtc), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_2, crtc), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_encoder_attach_crtc(encoder, crtc), 0);
+
+	KUNIT_EXPECT_TRUE(test, vkms_config_is_valid(config));
+
+	vkms_config_delete_plane(plane_1, config);
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->planes), 1);
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->crtcs), 1);
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->encoders), 1);
+
+	KUNIT_EXPECT_FALSE(test, vkms_config_is_valid(config));
+
+	plane_2->type = DRM_PLANE_TYPE_PRIMARY;
+
+	KUNIT_EXPECT_TRUE(test, vkms_config_is_valid(config));
+
+	vkms_config_destroy(config);
+}
+
+static void vkms_config_test_complex_config(struct kunit *test)
+{
+	struct vkms_config *config = vkms_config_create();
+
+	struct vkms_config_plane *plane_1 = vkms_config_create_plane(config);
+	struct vkms_config_plane *plane_2 = vkms_config_create_plane(config);
+	struct vkms_config_plane *plane_3 = vkms_config_create_plane(config);
+	struct vkms_config_plane *plane_4 = vkms_config_create_plane(config);
+	struct vkms_config_plane *plane_5 = vkms_config_create_plane(config);
+	struct vkms_config_plane *plane_6 = vkms_config_create_plane(config);
+	struct vkms_config_plane *plane_7 = vkms_config_create_plane(config);
+	struct vkms_config_plane *plane_8 = vkms_config_create_plane(config);
+	struct vkms_config_crtc *crtc_1 = vkms_config_create_crtc(config);
+	struct vkms_config_crtc *crtc_2 = vkms_config_create_crtc(config);
+	struct vkms_config_encoder *encoder_1 = vkms_config_create_encoder(config);
+	struct vkms_config_encoder *encoder_2 = vkms_config_create_encoder(config);
+	struct vkms_config_encoder *encoder_3 = vkms_config_create_encoder(config);
+	struct vkms_config_encoder *encoder_4 = vkms_config_create_encoder(config);
+
+	KUNIT_EXPECT_FALSE(test, vkms_config_is_valid(config));
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->planes), 8);
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->crtcs), 2);
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->encoders), 4);
+
+	plane_1->type = DRM_PLANE_TYPE_PRIMARY;
+	plane_2->type = DRM_PLANE_TYPE_CURSOR;
+	plane_3->type = DRM_PLANE_TYPE_OVERLAY;
+	plane_4->type = DRM_PLANE_TYPE_OVERLAY;
+	plane_5->type = DRM_PLANE_TYPE_PRIMARY;
+	plane_6->type = DRM_PLANE_TYPE_CURSOR;
+	plane_7->type = DRM_PLANE_TYPE_OVERLAY;
+	plane_8->type = DRM_PLANE_TYPE_OVERLAY;
+
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_1, crtc_1), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_2, crtc_1), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_3, crtc_1), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_4, crtc_1), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_5, crtc_2), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_6, crtc_2), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_7, crtc_2), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_8, crtc_2), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_3, crtc_2), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_plane_attach_crtc(plane_4, crtc_2), 0);
+
+	KUNIT_EXPECT_EQ(test, vkms_config_encoder_attach_crtc(encoder_1, crtc_1), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_encoder_attach_crtc(encoder_2, crtc_1), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_encoder_attach_crtc(encoder_3, crtc_1), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_encoder_attach_crtc(encoder_3, crtc_2), 0);
+	KUNIT_EXPECT_EQ(test, vkms_config_encoder_attach_crtc(encoder_4, crtc_2), 0);
+
+	KUNIT_EXPECT_TRUE(test, vkms_config_is_valid(config));
+
+	vkms_config_delete_plane(plane_4, config);
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->planes), 7);
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->crtcs), 2);
+	KUNIT_EXPECT_EQ(test, list_count_nodes(&config->encoders), 4);
+
+	KUNIT_EXPECT_TRUE(test, vkms_config_is_valid(config));
+
+	vkms_config_destroy(config);
+}
+
+static struct kunit_case vkms_config_test_cases[] = {
+	KUNIT_CASE(vkms_config_test_basic_allocation),
+	KUNIT_CASE(vkms_config_test_simple_config),
+	KUNIT_CASE(vkms_config_test_complex_config),
+	{}
+};
+
+static struct kunit_suite vkms_config_test_suite = {
+	.name = "vkms-config",
+	.test_cases = vkms_config_test_cases,
+};
+
+kunit_test_suite(vkms_config_test_suite);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Kunit test for vkms config utility");

-- 
2.44.2