diff options
Diffstat (limited to 'drivers/gpu/drm/tests/drm_rect_test.c')
| -rw-r--r-- | drivers/gpu/drm/tests/drm_rect_test.c | 529 |
1 files changed, 529 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tests/drm_rect_test.c b/drivers/gpu/drm/tests/drm_rect_test.c new file mode 100644 index 000000000..76332cd2e --- /dev/null +++ b/drivers/gpu/drm/tests/drm_rect_test.c @@ -0,0 +1,529 @@ +// 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, ¶ms->r2); + + KUNIT_EXPECT_EQ(test, visible, params->should_be_visible); + drm_rect_compare(test, &r1_aux, ¶ms->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(¶ms->src, ¶ms->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(¶ms->src, ¶ms->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, ¶ms->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, ¶ms->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_LICENSE("GPL"); |