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drm/tests: Add test cases for drm_rect_calc_hscale()

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Insert parameterized test for the drm_rect_calc_hscale() to ensure
correctness and prevent future regressions. Besides the test for the
usual case, tests the exceptions.

Signed-off-by: Arthur Grillo <arthurgrillo@riseup.net>
Reviewed-by: Maíra Canal <mcanal@igalia.com>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20230418230146.461129-3-arthurgrillo@riseup.net
This commit is contained in:
Arthur Grillo 2023-04-18 20:01:43 -03:00 committed by Maíra Canal
parent 96c3161926
commit 1f01f2247e
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GPG Key ID: B02EE8FD76781ED5
1 changed files with 72 additions and 0 deletions
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72
drivers/gpu/drm/tests/drm_rect_test.c
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@ -10,6 +10,7 @@
#include <drm/drm_rect.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)
@ -343,12 +344,83 @@ static void drm_test_rect_intersect(struct kunit *test)
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 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),
{ }
};