[PATCH v3 5/5] drm/test: Add test cases for drm_rect_rotate_inv()

[Arthur Grillo <arthurgrillo@xxxxxxxxxx>]

Insert a parameterized test for the drm_rect_rotate_inv() to ensure its
correctness and prevent future regressions. The test covers all rotation
modes.

It uses the same test cases from drm_test_rect_rotate().

Signed-off-by: Arthur Grillo <arthurgrillo@xxxxxxxxxx>
---
 drivers/gpu/drm/tests/drm_rect_test.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/tests/drm_rect_test.c b/drivers/gpu/drm/tests/drm_rect_test.c
index dca63552d289..862b9435dcc6 100644
--- a/drivers/gpu/drm/tests/drm_rect_test.c
+++ b/drivers/gpu/drm/tests/drm_rect_test.c
@@ -543,6 +543,16 @@ static void drm_test_rect_rotate(struct kunit *test)
 	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),
@@ -552,6 +562,7 @@ static struct kunit_case drm_rect_tests[] = {
 	KUNIT_CASE_PARAM(drm_test_rect_calc_hscale, drm_rect_hscale_gen_params),
 	KUNIT_CASE_PARAM(drm_test_rect_calc_vscale, drm_rect_vscale_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),
 	{ }
 };
 
-- 
2.39.2