drivers/gpu/drm/tests/drm_rect_test.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Test cases for the drm_rect functions
  *
  * Copyright (c) 2022 Maíra Canal <mairacanal@riseup.net>
  */

 #include <kunit/test.h>

 #include <drm/drm_rect.h>
 #include <drm/drm_mode.h>

 #include <linux/string_helpers.h>
 #include <linux/errno.h>

 static void drm_rect_compare(struct kunit *test, const struct drm_rect *r,
 			     const struct drm_rect *expected)
 {
 	KUNIT_EXPECT_EQ(test, r->x1, expected->x1);
 	KUNIT_EXPECT_EQ(test, r->y1, expected->y1);
 	KUNIT_EXPECT_EQ(test, drm_rect_width(r), drm_rect_width(expected));
 	KUNIT_EXPECT_EQ(test, drm_rect_height(r), drm_rect_height(expected));
 }

 static void drm_test_rect_clip_scaled_div_by_zero(struct kunit *test)
 {
 	struct drm_rect src, dst, clip;
 	bool visible;

 	/*
 	 * Make sure we don't divide by zero when dst
 	 * width/height is zero and dst and clip do not intersect.
 	 */
 	drm_rect_init(&src, 0, 0, 0, 0);
 	drm_rect_init(&dst, 0, 0, 0, 0);
 	drm_rect_init(&clip, 1, 1, 1, 1);
 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, visible, "Destination not be visible\n");
 	KUNIT_EXPECT_FALSE_MSG(test, drm_rect_visible(&src), "Source should not be visible\n");

 	drm_rect_init(&src, 0, 0, 0, 0);
 	drm_rect_init(&dst, 3, 3, 0, 0);
 	drm_rect_init(&clip, 1, 1, 1, 1);
 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, visible, "Destination not be visible\n");
 	KUNIT_EXPECT_FALSE_MSG(test, drm_rect_visible(&src), "Source should not be visible\n");
 }

 static void drm_test_rect_clip_scaled_not_clipped(struct kunit *test)
 {
 	struct drm_rect src, dst, clip;
 	bool visible;

 	/* 1:1 scaling */
 	drm_rect_init(&src, 0, 0, 1 << 16, 1 << 16);
 	drm_rect_init(&dst, 0, 0, 1, 1);
 	drm_rect_init(&clip, 0, 0, 1, 1);

 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 || src.x2 != 1 << 16 ||
 			       src.y1 != 0 || src.y2 != 1 << 16, "Source badly clipped\n");
 	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 || dst.x2 != 1 ||
 			       dst.y1 != 0 || dst.y2 != 1, "Destination badly clipped\n");
 	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
 	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

 	/* 2:1 scaling */
 	drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
 	drm_rect_init(&dst, 0, 0, 1, 1);
 	drm_rect_init(&clip, 0, 0, 1, 1);

 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 || src.x2 != 2 << 16 ||
 			       src.y1 != 0 || src.y2 != 2 << 16, "Source badly clipped\n");
 	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 || dst.x2 != 1 ||
 			       dst.y1 != 0 || dst.y2 != 1, "Destination badly clipped\n");
 	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
 	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

 	/* 1:2 scaling */
 	drm_rect_init(&src, 0, 0, 1 << 16, 1 << 16);
 	drm_rect_init(&dst, 0, 0, 2, 2);
 	drm_rect_init(&clip, 0, 0, 2, 2);

 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 || src.x2 != 1 << 16 ||
 			       src.y1 != 0 || src.y2 != 1 << 16, "Source badly clipped\n");
 	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 || dst.x2 != 2 ||
 			       dst.y1 != 0 || dst.y2 != 2, "Destination badly clipped\n");
 	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
 	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");
 }

 static void drm_test_rect_clip_scaled_clipped(struct kunit *test)
 {
 	struct drm_rect src, dst, clip;
 	bool visible;

 	/* 1:1 scaling top/left clip */
 	drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
 	drm_rect_init(&dst, 0, 0, 2, 2);
 	drm_rect_init(&clip, 0, 0, 1, 1);

 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 || src.x2 != 1 << 16 ||
 			       src.y1 != 0 || src.y2 != 1 << 16, "Source badly clipped\n");
 	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 || dst.x2 != 1 ||
 			       dst.y1 != 0 || dst.y2 != 1, "Destination badly clipped\n");
 	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
 	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

 	/* 1:1 scaling bottom/right clip */
 	drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
 	drm_rect_init(&dst, 0, 0, 2, 2);
 	drm_rect_init(&clip, 1, 1, 1, 1);

 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 1 << 16 || src.x2 != 2 << 16 ||
 			       src.y1 != 1 << 16 || src.y2 != 2 << 16, "Source badly clipped\n");
 	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 1 || dst.x2 != 2 || dst.y1 != 1 ||
 			       dst.y2 != 2, "Destination badly clipped\n");
 	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
 	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

 	/* 2:1 scaling top/left clip */
 	drm_rect_init(&src, 0, 0, 4 << 16, 4 << 16);
 	drm_rect_init(&dst, 0, 0, 2, 2);
 	drm_rect_init(&clip, 0, 0, 1, 1);

 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 || src.x2 != 2 << 16 ||
 			       src.y1 != 0 || src.y2 != 2 << 16, "Source badly clipped\n");
 	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 || dst.x2 != 1 || dst.y1 != 0 ||
 			       dst.y2 != 1, "Destination badly clipped\n");
 	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
 	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

 	/* 2:1 scaling bottom/right clip */
 	drm_rect_init(&src, 0, 0, 4 << 16, 4 << 16);
 	drm_rect_init(&dst, 0, 0, 2, 2);
 	drm_rect_init(&clip, 1, 1, 1, 1);

 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 2 << 16 || src.x2 != 4 << 16 ||
 			       src.y1 != 2 << 16 || src.y2 != 4 << 16, "Source badly clipped\n");
 	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 1 || dst.x2 != 2 || dst.y1 != 1 ||
 			       dst.y2 != 2, "Destination badly clipped\n");
 	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
 	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

 	/* 1:2 scaling top/left clip */
 	drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
 	drm_rect_init(&dst, 0, 0, 4, 4);
 	drm_rect_init(&clip, 0, 0, 2, 2);

 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 || src.x2 != 1 << 16 ||
 			       src.y1 != 0 || src.y2 != 1 << 16, "Source badly clipped\n");
 	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 || dst.x2 != 2 || dst.y1 != 0 ||
 			       dst.y2 != 2, "Destination badly clipped\n");
 	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
 	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

 	/* 1:2 scaling bottom/right clip */
 	drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
 	drm_rect_init(&dst, 0, 0, 4, 4);
 	drm_rect_init(&clip, 2, 2, 2, 2);

 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 1 << 16 || src.x2 != 2 << 16 ||
 			       src.y1 != 1 << 16 || src.y2 != 2 << 16, "Source badly clipped\n");
 	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 2 || dst.x2 != 4 || dst.y1 != 2 ||
 			       dst.y2 != 4, "Destination badly clipped\n");
 	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
 	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");
 }

 static void drm_test_rect_clip_scaled_signed_vs_unsigned(struct kunit *test)
 {
 	struct drm_rect src, dst, clip;
 	bool visible;

 	/*
 	 * 'clip.x2 - dst.x1 >= dst width' could result a negative
 	 * src rectangle width which is no longer expected by the
 	 * code as it's using unsigned types. This could lead to
 	 * the clipped source rectangle appering visible when it
 	 * should have been fully clipped. Make sure both rectangles
 	 * end up invisible.
 	 */
 	drm_rect_init(&src, 0, 0, INT_MAX, INT_MAX);
 	drm_rect_init(&dst, 0, 0, 2, 2);
 	drm_rect_init(&clip, 3, 3, 1, 1);

 	visible = drm_rect_clip_scaled(&src, &dst, &clip);

 	KUNIT_EXPECT_FALSE_MSG(test, visible, "Destination should not be visible\n");
 	KUNIT_EXPECT_FALSE_MSG(test, drm_rect_visible(&src), "Source should not be visible\n");
 }

 struct drm_rect_intersect_case {
 	const char *description;
 	struct drm_rect r1, r2;
 	bool should_be_visible;
 	struct drm_rect expected_intersection;
 };

 static const struct drm_rect_intersect_case drm_rect_intersect_cases[] = {
 	{
 		.description = "top-left x bottom-right",
 		.r1 = DRM_RECT_INIT(1, 1, 2, 2),
 		.r2 = DRM_RECT_INIT(0, 0, 2, 2),
 		.should_be_visible = true,
 		.expected_intersection = DRM_RECT_INIT(1, 1, 1, 1),
 	},
 	{
 		.description = "top-right x bottom-left",
 		.r1 = DRM_RECT_INIT(0, 0, 2, 2),
 		.r2 = DRM_RECT_INIT(1, -1, 2, 2),
 		.should_be_visible = true,
 		.expected_intersection = DRM_RECT_INIT(1, 0, 1, 1),
 	},
 	{
 		.description = "bottom-left x top-right",
 		.r1 = DRM_RECT_INIT(1, -1, 2, 2),
 		.r2 = DRM_RECT_INIT(0, 0, 2, 2),
 		.should_be_visible = true,
 		.expected_intersection = DRM_RECT_INIT(1, 0, 1, 1),
 	},
 	{
 		.description = "bottom-right x top-left",
 		.r1 = DRM_RECT_INIT(0, 0, 2, 2),
 		.r2 = DRM_RECT_INIT(1, 1, 2, 2),
 		.should_be_visible = true,
 		.expected_intersection = DRM_RECT_INIT(1, 1, 1, 1),
 	},
 	{
 		.description = "right x left",
 		.r1 = DRM_RECT_INIT(0, 0, 2, 1),
 		.r2 = DRM_RECT_INIT(1, 0, 3, 1),
 		.should_be_visible = true,
 		.expected_intersection = DRM_RECT_INIT(1, 0, 1, 1),
 	},
 	{
 		.description = "left x right",
 		.r1 = DRM_RECT_INIT(1, 0, 3, 1),
 		.r2 = DRM_RECT_INIT(0, 0, 2, 1),
 		.should_be_visible = true,
 		.expected_intersection = DRM_RECT_INIT(1, 0, 1, 1),
 	},
 	{
 		.description = "up x bottom",
 		.r1 = DRM_RECT_INIT(0, 0, 1, 2),
 		.r2 = DRM_RECT_INIT(0, -1, 1, 3),
 		.should_be_visible = true,
 		.expected_intersection = DRM_RECT_INIT(0, 0, 1, 2),
 	},
 	{
 		.description = "bottom x up",
 		.r1 = DRM_RECT_INIT(0, -1, 1, 3),
 		.r2 = DRM_RECT_INIT(0, 0, 1, 2),
 		.should_be_visible = true,
 		.expected_intersection = DRM_RECT_INIT(0, 0, 1, 2),
 	},
 	{
 		.description = "touching corner",
 		.r1 = DRM_RECT_INIT(0, 0, 1, 1),
 		.r2 = DRM_RECT_INIT(1, 1, 2, 2),
 		.should_be_visible = false,
 		.expected_intersection = DRM_RECT_INIT(1, 1, 0, 0),
 	},
 	{
 		.description = "touching side",
 		.r1 = DRM_RECT_INIT(0, 0, 1, 1),
 		.r2 = DRM_RECT_INIT(1, 0, 1, 1),
 		.should_be_visible = false,
 		.expected_intersection = DRM_RECT_INIT(1, 0, 0, 1),
 	},
 	{
 		.description = "equal rects",
 		.r1 = DRM_RECT_INIT(0, 0, 2, 2),
 		.r2 = DRM_RECT_INIT(0, 0, 2, 2),
 		.should_be_visible = true,
 		.expected_intersection = DRM_RECT_INIT(0, 0, 2, 2),
 	},
 	{
 		.description = "inside another",
 		.r1 = DRM_RECT_INIT(0, 0, 2, 2),
 		.r2 = DRM_RECT_INIT(1, 1, 1, 1),
 		.should_be_visible = true,
 		.expected_intersection = DRM_RECT_INIT(1, 1, 1, 1),
 	},
 	{
 		.description = "far away",
 		.r1 = DRM_RECT_INIT(0, 0, 1, 1),
 		.r2 = DRM_RECT_INIT(3, 6, 1, 1),
 		.should_be_visible = false,
 		.expected_intersection = DRM_RECT_INIT(3, 6, -2, -5),
 	},
 	{
 		.description = "points intersecting",
 		.r1 = DRM_RECT_INIT(5, 10, 0, 0),
 		.r2 = DRM_RECT_INIT(5, 10, 0, 0),
 		.should_be_visible = false,
 		.expected_intersection = DRM_RECT_INIT(5, 10, 0, 0),
 	},
 	{
 		.description = "points not intersecting",
 		.r1 = DRM_RECT_INIT(0, 0, 0, 0),
 		.r2 = DRM_RECT_INIT(5, 10, 0, 0),
 		.should_be_visible = false,
 		.expected_intersection = DRM_RECT_INIT(5, 10, -5, -10),
 	},
 };

 static void drm_rect_intersect_case_desc(const struct drm_rect_intersect_case *t, char *desc)
 {
 	snprintf(desc, KUNIT_PARAM_DESC_SIZE,
 		 "%s: " DRM_RECT_FMT " x " DRM_RECT_FMT,
 		 t->description, DRM_RECT_ARG(&t->r1), DRM_RECT_ARG(&t->r2));
 }

 KUNIT_ARRAY_PARAM(drm_rect_intersect, drm_rect_intersect_cases, drm_rect_intersect_case_desc);

 static void drm_test_rect_intersect(struct kunit *test)
 {
 	const struct drm_rect_intersect_case *params = test->param_value;
 	struct drm_rect r1_aux = params->r1;
 	bool visible;

 	visible = drm_rect_intersect(&r1_aux, &params->r2);

 	KUNIT_EXPECT_EQ(test, visible, params->should_be_visible);
 	drm_rect_compare(test, &r1_aux, &params->expected_intersection);
 }

 struct drm_rect_scale_case {
 	const char *name;
 	struct drm_rect src, dst;
 	int min_range, max_range;
 	int expected_scaling_factor;
 };

 static const struct drm_rect_scale_case drm_rect_scale_cases[] = {
 	{
 		.name = "normal use",
 		.src = DRM_RECT_INIT(0, 0, 2 << 16, 2 << 16),
 		.dst = DRM_RECT_INIT(0, 0, 1 << 16, 1 << 16),
 		.min_range = 0, .max_range = INT_MAX,
 		.expected_scaling_factor = 2,
 	},
 	{
 		.name = "out of max range",
 		.src = DRM_RECT_INIT(0, 0, 10 << 16, 10 << 16),
 		.dst = DRM_RECT_INIT(0, 0, 1 << 16, 1 << 16),
 		.min_range = 3, .max_range = 5,
 		.expected_scaling_factor = -ERANGE,
 	},
 	{
 		.name = "out of min range",
 		.src = DRM_RECT_INIT(0, 0, 2 << 16, 2 << 16),
 		.dst = DRM_RECT_INIT(0, 0, 1 << 16, 1 << 16),
 		.min_range = 3, .max_range = 5,
 		.expected_scaling_factor = -ERANGE,
 	},
 	{
 		.name = "zero dst",
 		.src = DRM_RECT_INIT(0, 0, 2 << 16, 2 << 16),
 		.dst = DRM_RECT_INIT(0, 0, 0 << 16, 0 << 16),
 		.min_range = 0, .max_range = INT_MAX,
 		.expected_scaling_factor = 0,
 	},
 	{
 		.name = "negative src",
 		.src = DRM_RECT_INIT(0, 0, -(1 << 16), -(1 << 16)),
 		.dst = DRM_RECT_INIT(0, 0, 1 << 16, 1 << 16),
 		.min_range = 0, .max_range = INT_MAX,
 		.expected_scaling_factor = -EINVAL,
 	},
 	{
 		.name = "negative dst",
 		.src = DRM_RECT_INIT(0, 0, 1 << 16, 1 << 16),
 		.dst = DRM_RECT_INIT(0, 0, -(1 << 16), -(1 << 16)),
 		.min_range = 0, .max_range = INT_MAX,
 		.expected_scaling_factor = -EINVAL,
 	},
 };

 static void drm_rect_scale_case_desc(const struct drm_rect_scale_case *t, char *desc)
 {
 	strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);
 }

 KUNIT_ARRAY_PARAM(drm_rect_scale, drm_rect_scale_cases, drm_rect_scale_case_desc);

 static void drm_test_rect_calc_hscale(struct kunit *test)
 {
 	const struct drm_rect_scale_case *params = test->param_value;
 	int scaling_factor;

 	scaling_factor = drm_rect_calc_hscale(&params->src, &params->dst,
 					      params->min_range, params->max_range);

 	KUNIT_EXPECT_EQ(test, scaling_factor, params->expected_scaling_factor);
 }

 static void drm_test_rect_calc_vscale(struct kunit *test)
 {
 	const struct drm_rect_scale_case *params = test->param_value;
 	int scaling_factor;

 	scaling_factor = drm_rect_calc_vscale(&params->src, &params->dst,
 					      params->min_range, params->max_range);

 	KUNIT_EXPECT_EQ(test, scaling_factor, params->expected_scaling_factor);
 }

 struct drm_rect_rotate_case {
 	const char *name;
 	unsigned int rotation;
 	struct drm_rect rect;
 	int width, height;
 	struct drm_rect expected;
 };

 static const struct drm_rect_rotate_case drm_rect_rotate_cases[] = {
 	{
 		.name = "reflect-x",
 		.rotation = DRM_MODE_REFLECT_X,
 		.rect = DRM_RECT_INIT(0, 0, 5, 5),
 		.width = 5, .height = 10,
 		.expected = DRM_RECT_INIT(0, 0, 5, 5),
 	},
 	{
 		.name = "reflect-y",
 		.rotation = DRM_MODE_REFLECT_Y,
 		.rect = DRM_RECT_INIT(2, 0, 5, 5),
 		.width = 5, .height = 10,
 		.expected = DRM_RECT_INIT(2, 5, 5, 5),
 	},
 	{
 		.name = "rotate-0",
 		.rotation = DRM_MODE_ROTATE_0,
 		.rect = DRM_RECT_INIT(0, 2, 5, 5),
 		.width = 5, .height = 10,
 		.expected = DRM_RECT_INIT(0, 2, 5, 5),
 	},
 	{
 		.name = "rotate-90",
 		.rotation = DRM_MODE_ROTATE_90,
 		.rect = DRM_RECT_INIT(0, 0, 5, 10),
 		.width = 5, .height = 10,
 		.expected = DRM_RECT_INIT(0, 0, 10, 5),
 	},
 	{
 		.name = "rotate-180",
 		.rotation = DRM_MODE_ROTATE_180,
 		.rect = DRM_RECT_INIT(11, 3, 5, 10),
 		.width = 5, .height = 10,
 		.expected = DRM_RECT_INIT(-11, -3, 5, 10),
 	},
 	{
 		.name = "rotate-270",
 		.rotation = DRM_MODE_ROTATE_270,
 		.rect = DRM_RECT_INIT(6, 3, 5, 10),
 		.width = 5, .height = 10,
 		.expected = DRM_RECT_INIT(-3, 6, 10, 5),
 	},
 };

 static void drm_rect_rotate_case_desc(const struct drm_rect_rotate_case *t, char *desc)
 {
 	strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);
 }

 KUNIT_ARRAY_PARAM(drm_rect_rotate, drm_rect_rotate_cases, drm_rect_rotate_case_desc);

 static void drm_test_rect_rotate(struct kunit *test)
 {
 	const struct drm_rect_rotate_case *params = test->param_value;
 	struct drm_rect r = params->rect;

 	drm_rect_rotate(&r, params->width, params->height, params->rotation);

 	drm_rect_compare(test, &r, &params->expected);
 }

 static void drm_test_rect_rotate_inv(struct kunit *test)
 {
 	const struct drm_rect_rotate_case *params = test->param_value;
 	struct drm_rect r = params->expected;

 	drm_rect_rotate_inv(&r, params->width, params->height, params->rotation);

 	drm_rect_compare(test, &r, &params->rect);
 }

 static struct kunit_case drm_rect_tests[] = {
 	KUNIT_CASE(drm_test_rect_clip_scaled_div_by_zero),
 	KUNIT_CASE(drm_test_rect_clip_scaled_not_clipped),
 	KUNIT_CASE(drm_test_rect_clip_scaled_clipped),
 	KUNIT_CASE(drm_test_rect_clip_scaled_signed_vs_unsigned),
 	KUNIT_CASE_PARAM(drm_test_rect_intersect, drm_rect_intersect_gen_params),
 	KUNIT_CASE_PARAM(drm_test_rect_calc_hscale, drm_rect_scale_gen_params),
 	KUNIT_CASE_PARAM(drm_test_rect_calc_vscale, drm_rect_scale_gen_params),
 	KUNIT_CASE_PARAM(drm_test_rect_rotate, drm_rect_rotate_gen_params),
 	KUNIT_CASE_PARAM(drm_test_rect_rotate_inv, drm_rect_rotate_gen_params),
 	{ }
 };

 static struct kunit_suite drm_rect_test_suite = {
 	.name = "drm_rect",
 	.test_cases = drm_rect_tests,
 };

 kunit_test_suite(drm_rect_test_suite);

 MODULE_DESCRIPTION("Test cases for the drm_rect functions");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Test cases for the drm_rect functions
	*
	* Copyright (c) 2022 Maíra Canal <mairacanal@riseup.net>
	*/

	#include <kunit/test.h>

	#include <drm/drm_rect.h>
	#include <drm/drm_mode.h>

	#include <linux/string_helpers.h>
	#include <linux/errno.h>

	static void drm_rect_compare(struct kunit test, const struct drm_rect r,
	const struct drm_rect *expected)
	{
	KUNIT_EXPECT_EQ(test, r->x1, expected->x1);
	KUNIT_EXPECT_EQ(test, r->y1, expected->y1);
	KUNIT_EXPECT_EQ(test, drm_rect_width(r), drm_rect_width(expected));
	KUNIT_EXPECT_EQ(test, drm_rect_height(r), drm_rect_height(expected));
	}

	static void drm_test_rect_clip_scaled_div_by_zero(struct kunit *test)
	{
	struct drm_rect src, dst, clip;
	bool visible;

	/*
	* Make sure we don't divide by zero when dst
	* width/height is zero and dst and clip do not intersect.
	*/
	drm_rect_init(&src, 0, 0, 0, 0);
	drm_rect_init(&dst, 0, 0, 0, 0);
	drm_rect_init(&clip, 1, 1, 1, 1);
	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, visible, "Destination not be visible\n");
	KUNIT_EXPECT_FALSE_MSG(test, drm_rect_visible(&src), "Source should not be visible\n");

	drm_rect_init(&src, 0, 0, 0, 0);
	drm_rect_init(&dst, 3, 3, 0, 0);
	drm_rect_init(&clip, 1, 1, 1, 1);
	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, visible, "Destination not be visible\n");
	KUNIT_EXPECT_FALSE_MSG(test, drm_rect_visible(&src), "Source should not be visible\n");
	}

	static void drm_test_rect_clip_scaled_not_clipped(struct kunit *test)
	{
	struct drm_rect src, dst, clip;
	bool visible;

	/* 1:1 scaling */
	drm_rect_init(&src, 0, 0, 1 << 16, 1 << 16);
	drm_rect_init(&dst, 0, 0, 1, 1);
	drm_rect_init(&clip, 0, 0, 1, 1);

	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 \|\| src.x2 != 1 << 16 \|\|
	src.y1 != 0 \|\| src.y2 != 1 << 16, "Source badly clipped\n");
	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 \|\| dst.x2 != 1 \|\|
	dst.y1 != 0 \|\| dst.y2 != 1, "Destination badly clipped\n");
	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

	/* 2:1 scaling */
	drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
	drm_rect_init(&dst, 0, 0, 1, 1);
	drm_rect_init(&clip, 0, 0, 1, 1);

	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 \|\| src.x2 != 2 << 16 \|\|
	src.y1 != 0 \|\| src.y2 != 2 << 16, "Source badly clipped\n");
	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 \|\| dst.x2 != 1 \|\|
	dst.y1 != 0 \|\| dst.y2 != 1, "Destination badly clipped\n");
	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

	/* 1:2 scaling */
	drm_rect_init(&src, 0, 0, 1 << 16, 1 << 16);
	drm_rect_init(&dst, 0, 0, 2, 2);
	drm_rect_init(&clip, 0, 0, 2, 2);

	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 \|\| src.x2 != 1 << 16 \|\|
	src.y1 != 0 \|\| src.y2 != 1 << 16, "Source badly clipped\n");
	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 \|\| dst.x2 != 2 \|\|
	dst.y1 != 0 \|\| dst.y2 != 2, "Destination badly clipped\n");
	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");
	}

	static void drm_test_rect_clip_scaled_clipped(struct kunit *test)
	{
	struct drm_rect src, dst, clip;
	bool visible;

	/* 1:1 scaling top/left clip */
	drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
	drm_rect_init(&dst, 0, 0, 2, 2);
	drm_rect_init(&clip, 0, 0, 1, 1);

	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 \|\| src.x2 != 1 << 16 \|\|
	src.y1 != 0 \|\| src.y2 != 1 << 16, "Source badly clipped\n");
	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 \|\| dst.x2 != 1 \|\|
	dst.y1 != 0 \|\| dst.y2 != 1, "Destination badly clipped\n");
	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

	/* 1:1 scaling bottom/right clip */
	drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
	drm_rect_init(&dst, 0, 0, 2, 2);
	drm_rect_init(&clip, 1, 1, 1, 1);

	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 1 << 16 \|\| src.x2 != 2 << 16 \|\|
	src.y1 != 1 << 16 \|\| src.y2 != 2 << 16, "Source badly clipped\n");
	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 1 \|\| dst.x2 != 2 \|\| dst.y1 != 1 \|\|
	dst.y2 != 2, "Destination badly clipped\n");
	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

	/* 2:1 scaling top/left clip */
	drm_rect_init(&src, 0, 0, 4 << 16, 4 << 16);
	drm_rect_init(&dst, 0, 0, 2, 2);
	drm_rect_init(&clip, 0, 0, 1, 1);

	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 \|\| src.x2 != 2 << 16 \|\|
	src.y1 != 0 \|\| src.y2 != 2 << 16, "Source badly clipped\n");
	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 \|\| dst.x2 != 1 \|\| dst.y1 != 0 \|\|
	dst.y2 != 1, "Destination badly clipped\n");
	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

	/* 2:1 scaling bottom/right clip */
	drm_rect_init(&src, 0, 0, 4 << 16, 4 << 16);
	drm_rect_init(&dst, 0, 0, 2, 2);
	drm_rect_init(&clip, 1, 1, 1, 1);

	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 2 << 16 \|\| src.x2 != 4 << 16 \|\|
	src.y1 != 2 << 16 \|\| src.y2 != 4 << 16, "Source badly clipped\n");
	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 1 \|\| dst.x2 != 2 \|\| dst.y1 != 1 \|\|
	dst.y2 != 2, "Destination badly clipped\n");
	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

	/* 1:2 scaling top/left clip */
	drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
	drm_rect_init(&dst, 0, 0, 4, 4);
	drm_rect_init(&clip, 0, 0, 2, 2);

	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 0 \|\| src.x2 != 1 << 16 \|\|
	src.y1 != 0 \|\| src.y2 != 1 << 16, "Source badly clipped\n");
	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 0 \|\| dst.x2 != 2 \|\| dst.y1 != 0 \|\|
	dst.y2 != 2, "Destination badly clipped\n");
	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");

	/* 1:2 scaling bottom/right clip */
	drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
	drm_rect_init(&dst, 0, 0, 4, 4);
	drm_rect_init(&clip, 2, 2, 2, 2);

	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, src.x1 != 1 << 16 \|\| src.x2 != 2 << 16 \|\|
	src.y1 != 1 << 16 \|\| src.y2 != 2 << 16, "Source badly clipped\n");
	KUNIT_EXPECT_FALSE_MSG(test, dst.x1 != 2 \|\| dst.x2 != 4 \|\| dst.y1 != 2 \|\|
	dst.y2 != 4, "Destination badly clipped\n");
	KUNIT_EXPECT_TRUE_MSG(test, visible, "Destination should be visible\n");
	KUNIT_EXPECT_TRUE_MSG(test, drm_rect_visible(&src), "Source should be visible\n");
	}

	static void drm_test_rect_clip_scaled_signed_vs_unsigned(struct kunit *test)
	{
	struct drm_rect src, dst, clip;
	bool visible;

	/*
	* 'clip.x2 - dst.x1 >= dst width' could result a negative
	* src rectangle width which is no longer expected by the
	* code as it's using unsigned types. This could lead to
	* the clipped source rectangle appering visible when it
	* should have been fully clipped. Make sure both rectangles
	* end up invisible.
	*/
	drm_rect_init(&src, 0, 0, INT_MAX, INT_MAX);
	drm_rect_init(&dst, 0, 0, 2, 2);
	drm_rect_init(&clip, 3, 3, 1, 1);

	visible = drm_rect_clip_scaled(&src, &dst, &clip);

	KUNIT_EXPECT_FALSE_MSG(test, visible, "Destination should not be visible\n");
	KUNIT_EXPECT_FALSE_MSG(test, drm_rect_visible(&src), "Source should not be visible\n");
	}

	struct drm_rect_intersect_case {
	const char *description;
	struct drm_rect r1, r2;
	bool should_be_visible;
	struct drm_rect expected_intersection;
	};

	static const struct drm_rect_intersect_case drm_rect_intersect_cases[] = {
	{
	.description = "top-left x bottom-right",
	.r1 = DRM_RECT_INIT(1, 1, 2, 2),
	.r2 = DRM_RECT_INIT(0, 0, 2, 2),
	.should_be_visible = true,
	.expected_intersection = DRM_RECT_INIT(1, 1, 1, 1),
	},
	{
	.description = "top-right x bottom-left",
	.r1 = DRM_RECT_INIT(0, 0, 2, 2),
	.r2 = DRM_RECT_INIT(1, -1, 2, 2),
	.should_be_visible = true,
	.expected_intersection = DRM_RECT_INIT(1, 0, 1, 1),
	},
	{
	.description = "bottom-left x top-right",
	.r1 = DRM_RECT_INIT(1, -1, 2, 2),
	.r2 = DRM_RECT_INIT(0, 0, 2, 2),
	.should_be_visible = true,
	.expected_intersection = DRM_RECT_INIT(1, 0, 1, 1),
	},
	{
	.description = "bottom-right x top-left",
	.r1 = DRM_RECT_INIT(0, 0, 2, 2),
	.r2 = DRM_RECT_INIT(1, 1, 2, 2),
	.should_be_visible = true,
	.expected_intersection = DRM_RECT_INIT(1, 1, 1, 1),
	},
	{
	.description = "right x left",
	.r1 = DRM_RECT_INIT(0, 0, 2, 1),
	.r2 = DRM_RECT_INIT(1, 0, 3, 1),
	.should_be_visible = true,
	.expected_intersection = DRM_RECT_INIT(1, 0, 1, 1),
	},
	{
	.description = "left x right",
	.r1 = DRM_RECT_INIT(1, 0, 3, 1),
	.r2 = DRM_RECT_INIT(0, 0, 2, 1),
	.should_be_visible = true,
	.expected_intersection = DRM_RECT_INIT(1, 0, 1, 1),
	},
	{
	.description = "up x bottom",
	.r1 = DRM_RECT_INIT(0, 0, 1, 2),
	.r2 = DRM_RECT_INIT(0, -1, 1, 3),
	.should_be_visible = true,
	.expected_intersection = DRM_RECT_INIT(0, 0, 1, 2),
	},
	{
	.description = "bottom x up",
	.r1 = DRM_RECT_INIT(0, -1, 1, 3),
	.r2 = DRM_RECT_INIT(0, 0, 1, 2),
	.should_be_visible = true,
	.expected_intersection = DRM_RECT_INIT(0, 0, 1, 2),
	},
	{
	.description = "touching corner",
	.r1 = DRM_RECT_INIT(0, 0, 1, 1),
	.r2 = DRM_RECT_INIT(1, 1, 2, 2),
	.should_be_visible = false,
	.expected_intersection = DRM_RECT_INIT(1, 1, 0, 0),
	},
	{
	.description = "touching side",
	.r1 = DRM_RECT_INIT(0, 0, 1, 1),
	.r2 = DRM_RECT_INIT(1, 0, 1, 1),
	.should_be_visible = false,
	.expected_intersection = DRM_RECT_INIT(1, 0, 0, 1),
	},
	{
	.description = "equal rects",
	.r1 = DRM_RECT_INIT(0, 0, 2, 2),
	.r2 = DRM_RECT_INIT(0, 0, 2, 2),
	.should_be_visible = true,
	.expected_intersection = DRM_RECT_INIT(0, 0, 2, 2),
	},
	{
	.description = "inside another",
	.r1 = DRM_RECT_INIT(0, 0, 2, 2),
	.r2 = DRM_RECT_INIT(1, 1, 1, 1),
	.should_be_visible = true,
	.expected_intersection = DRM_RECT_INIT(1, 1, 1, 1),
	},
	{
	.description = "far away",
	.r1 = DRM_RECT_INIT(0, 0, 1, 1),
	.r2 = DRM_RECT_INIT(3, 6, 1, 1),
	.should_be_visible = false,
	.expected_intersection = DRM_RECT_INIT(3, 6, -2, -5),
	},
	{
	.description = "points intersecting",
	.r1 = DRM_RECT_INIT(5, 10, 0, 0),
	.r2 = DRM_RECT_INIT(5, 10, 0, 0),
	.should_be_visible = false,
	.expected_intersection = DRM_RECT_INIT(5, 10, 0, 0),
	},
	{
	.description = "points not intersecting",
	.r1 = DRM_RECT_INIT(0, 0, 0, 0),
	.r2 = DRM_RECT_INIT(5, 10, 0, 0),
	.should_be_visible = false,
	.expected_intersection = DRM_RECT_INIT(5, 10, -5, -10),
	},
	};

	static void drm_rect_intersect_case_desc(const struct drm_rect_intersect_case t, char desc)
	{
	snprintf(desc, KUNIT_PARAM_DESC_SIZE,
	"%s: " DRM_RECT_FMT " x " DRM_RECT_FMT,
	t->description, DRM_RECT_ARG(&t->r1), DRM_RECT_ARG(&t->r2));
	}

	KUNIT_ARRAY_PARAM(drm_rect_intersect, drm_rect_intersect_cases, drm_rect_intersect_case_desc);

	static void drm_test_rect_intersect(struct kunit *test)
	{
	const struct drm_rect_intersect_case *params = test->param_value;
	struct drm_rect r1_aux = params->r1;
	bool visible;

	visible = drm_rect_intersect(&r1_aux, &params->r2);

	KUNIT_EXPECT_EQ(test, visible, params->should_be_visible);
	drm_rect_compare(test, &r1_aux, &params->expected_intersection);
	}

	struct drm_rect_scale_case {
	const char *name;
	struct drm_rect src, dst;
	int min_range, max_range;
	int expected_scaling_factor;
	};

	static const struct drm_rect_scale_case drm_rect_scale_cases[] = {
	{
	.name = "normal use",
	.src = DRM_RECT_INIT(0, 0, 2 << 16, 2 << 16),
	.dst = DRM_RECT_INIT(0, 0, 1 << 16, 1 << 16),
	.min_range = 0, .max_range = INT_MAX,
	.expected_scaling_factor = 2,
	},
	{
	.name = "out of max range",
	.src = DRM_RECT_INIT(0, 0, 10 << 16, 10 << 16),
	.dst = DRM_RECT_INIT(0, 0, 1 << 16, 1 << 16),
	.min_range = 3, .max_range = 5,
	.expected_scaling_factor = -ERANGE,
	},
	{
	.name = "out of min range",
	.src = DRM_RECT_INIT(0, 0, 2 << 16, 2 << 16),
	.dst = DRM_RECT_INIT(0, 0, 1 << 16, 1 << 16),
	.min_range = 3, .max_range = 5,
	.expected_scaling_factor = -ERANGE,
	},
	{
	.name = "zero dst",
	.src = DRM_RECT_INIT(0, 0, 2 << 16, 2 << 16),
	.dst = DRM_RECT_INIT(0, 0, 0 << 16, 0 << 16),
	.min_range = 0, .max_range = INT_MAX,
	.expected_scaling_factor = 0,
	},
	{
	.name = "negative src",
	.src = DRM_RECT_INIT(0, 0, -(1 << 16), -(1 << 16)),
	.dst = DRM_RECT_INIT(0, 0, 1 << 16, 1 << 16),
	.min_range = 0, .max_range = INT_MAX,
	.expected_scaling_factor = -EINVAL,
	},
	{
	.name = "negative dst",
	.src = DRM_RECT_INIT(0, 0, 1 << 16, 1 << 16),
	.dst = DRM_RECT_INIT(0, 0, -(1 << 16), -(1 << 16)),
	.min_range = 0, .max_range = INT_MAX,
	.expected_scaling_factor = -EINVAL,
	},
	};

	static void drm_rect_scale_case_desc(const struct drm_rect_scale_case t, char desc)
	{
	strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);
	}

	KUNIT_ARRAY_PARAM(drm_rect_scale, drm_rect_scale_cases, drm_rect_scale_case_desc);

	static void drm_test_rect_calc_hscale(struct kunit *test)
	{
	const struct drm_rect_scale_case *params = test->param_value;
	int scaling_factor;

	scaling_factor = drm_rect_calc_hscale(&params->src, &params->dst,
	params->min_range, params->max_range);

	KUNIT_EXPECT_EQ(test, scaling_factor, params->expected_scaling_factor);
	}

	static void drm_test_rect_calc_vscale(struct kunit *test)
	{
	const struct drm_rect_scale_case *params = test->param_value;
	int scaling_factor;

	scaling_factor = drm_rect_calc_vscale(&params->src, &params->dst,
	params->min_range, params->max_range);

	KUNIT_EXPECT_EQ(test, scaling_factor, params->expected_scaling_factor);
	}

	struct drm_rect_rotate_case {
	const char *name;
	unsigned int rotation;
	struct drm_rect rect;
	int width, height;
	struct drm_rect expected;
	};

	static const struct drm_rect_rotate_case drm_rect_rotate_cases[] = {
	{
	.name = "reflect-x",
	.rotation = DRM_MODE_REFLECT_X,
	.rect = DRM_RECT_INIT(0, 0, 5, 5),
	.width = 5, .height = 10,
	.expected = DRM_RECT_INIT(0, 0, 5, 5),
	},
	{
	.name = "reflect-y",
	.rotation = DRM_MODE_REFLECT_Y,
	.rect = DRM_RECT_INIT(2, 0, 5, 5),
	.width = 5, .height = 10,
	.expected = DRM_RECT_INIT(2, 5, 5, 5),
	},
	{
	.name = "rotate-0",
	.rotation = DRM_MODE_ROTATE_0,
	.rect = DRM_RECT_INIT(0, 2, 5, 5),
	.width = 5, .height = 10,
	.expected = DRM_RECT_INIT(0, 2, 5, 5),
	},
	{
	.name = "rotate-90",
	.rotation = DRM_MODE_ROTATE_90,
	.rect = DRM_RECT_INIT(0, 0, 5, 10),
	.width = 5, .height = 10,
	.expected = DRM_RECT_INIT(0, 0, 10, 5),
	},
	{
	.name = "rotate-180",
	.rotation = DRM_MODE_ROTATE_180,
	.rect = DRM_RECT_INIT(11, 3, 5, 10),
	.width = 5, .height = 10,
	.expected = DRM_RECT_INIT(-11, -3, 5, 10),
	},
	{
	.name = "rotate-270",
	.rotation = DRM_MODE_ROTATE_270,
	.rect = DRM_RECT_INIT(6, 3, 5, 10),
	.width = 5, .height = 10,
	.expected = DRM_RECT_INIT(-3, 6, 10, 5),
	},
	};

	static void drm_rect_rotate_case_desc(const struct drm_rect_rotate_case t, char desc)
	{
	strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);
	}

	KUNIT_ARRAY_PARAM(drm_rect_rotate, drm_rect_rotate_cases, drm_rect_rotate_case_desc);

	static void drm_test_rect_rotate(struct kunit *test)
	{
	const struct drm_rect_rotate_case *params = test->param_value;
	struct drm_rect r = params->rect;

	drm_rect_rotate(&r, params->width, params->height, params->rotation);

	drm_rect_compare(test, &r, &params->expected);
	}

	static void drm_test_rect_rotate_inv(struct kunit *test)
	{
	const struct drm_rect_rotate_case *params = test->param_value;
	struct drm_rect r = params->expected;

	drm_rect_rotate_inv(&r, params->width, params->height, params->rotation);

	drm_rect_compare(test, &r, &params->rect);
	}

	static struct kunit_case drm_rect_tests[] = {
	KUNIT_CASE(drm_test_rect_clip_scaled_div_by_zero),
	KUNIT_CASE(drm_test_rect_clip_scaled_not_clipped),
	KUNIT_CASE(drm_test_rect_clip_scaled_clipped),
	KUNIT_CASE(drm_test_rect_clip_scaled_signed_vs_unsigned),
	KUNIT_CASE_PARAM(drm_test_rect_intersect, drm_rect_intersect_gen_params),
	KUNIT_CASE_PARAM(drm_test_rect_calc_hscale, drm_rect_scale_gen_params),
	KUNIT_CASE_PARAM(drm_test_rect_calc_vscale, drm_rect_scale_gen_params),
	KUNIT_CASE_PARAM(drm_test_rect_rotate, drm_rect_rotate_gen_params),
	KUNIT_CASE_PARAM(drm_test_rect_rotate_inv, drm_rect_rotate_gen_params),
	{ }
	};

	static struct kunit_suite drm_rect_test_suite = {
	.name = "drm_rect",
	.test_cases = drm_rect_tests,
	};

	kunit_test_suite(drm_rect_test_suite);

	MODULE_DESCRIPTION("Test cases for the drm_rect functions");
	MODULE_LICENSE("GPL");