[PATCH 4/5] drm/tests: Test drm_rect_rotate()

[Arthur Grillo]

Insert test for the drm_rect_rotate() function, create test cases
for all the rotation modes.

Signed-off-by: Arthur Grillo <arthurgrillo at riseup.net>
---
 drivers/gpu/drm/tests/drm_rect_test.c | 74 +++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/drivers/gpu/drm/tests/drm_rect_test.c b/drivers/gpu/drm/tests/drm_rect_test.c
index 0f7736073390..46139e796f3f 100644
--- a/drivers/gpu/drm/tests/drm_rect_test.c
+++ b/drivers/gpu/drm/tests/drm_rect_test.c
@@ -8,6 +8,7 @@
 #include <kunit/test.h>
 
 #include <drm/drm_rect.h>
+#include <drm/drm_mode.h>
 
 #include <linux/errno.h>
 
@@ -333,6 +334,78 @@ static void drm_test_rect_calc_vscale_negative_args(struct kunit *test)
 	KUNIT_EXPECT_EQ(test, scaling_factor, -EINVAL);
 }
 
+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 = 0, .height = 0,
+		.expected = DRM_RECT_INIT(-5, 0, 5, 5),
+	},
+	{
+		.name = "reflect y",
+		.rotation = DRM_MODE_REFLECT_Y,
+		.rect = DRM_RECT_INIT(0, 0, 5, 5),
+		.width = 0, .height = 0,
+		.expected = DRM_RECT_INIT(0, -5, 5, 5),
+	},
+	{
+		.name = "rotate 0",
+		.rotation = DRM_MODE_ROTATE_0,
+		.rect = DRM_RECT_INIT(0, 0, 5, 5),
+		.width = 0, .height = 0,
+		.expected = DRM_RECT_INIT(0, 0, 5, 5),
+	},
+	{
+		.name = "rotate 90",
+		.rotation = DRM_MODE_ROTATE_90,
+		.rect = DRM_RECT_INIT(0, 0, 5, 10),
+		.width = 0, .height = 0,
+		.expected = DRM_RECT_INIT(0, -5, 10, 5),
+	},
+	{
+		.name = "rotate 180",
+		.rotation = DRM_MODE_ROTATE_180,
+		.rect = DRM_RECT_INIT(0, 0, 5, 10),
+		.width = 0, .height = 0,
+		.expected = DRM_RECT_INIT(-5, -10, 5, 10),
+	},
+	{
+		.name = "rotate 270",
+		.rotation = DRM_MODE_ROTATE_270,
+		.rect = DRM_RECT_INIT(0, 0, 5, 10),
+		.width = 0, .height = 0,
+		.expected = DRM_RECT_INIT(-10, 0, 10, 5),
+	},
+};
+
+static void drm_rect_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_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;
+
+	memcpy(&r, &params->rect, sizeof(struct drm_rect));
+
+	drm_rect_rotate(&r, params->width, params->height, params->rotation);
+
+	drm_rect_compare(test, &r, &params->expected);
+}
+
 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),
@@ -345,6 +418,7 @@ static struct kunit_case drm_rect_tests[] = {
 	KUNIT_CASE(drm_test_rect_calc_vscale),
 	KUNIT_CASE(drm_test_rect_calc_vscale_out_of_range),
 	KUNIT_CASE(drm_test_rect_calc_vscale_negative_args),
+	KUNIT_CASE_PARAM(drm_test_rect_rotate, drm_rect_rotate_gen_params),
 	{ }
 };
 
-- 
2.39.2