[PATCH v4 4/5] drm/tests: Add test cases for drm_rect_rotate()

[Maíra Canal]

On 4/6/23 08:53, Arthur Grillo wrote:
> Insert a parameterized test for the drm_rect_rotate() to ensure
> correctness and prevent future regressions.
> 
> All possible rotation modes are covered by the test.
> 
> Signed-off-by: Arthur Grillo <arthurgrillo at riseup.net>

Thanks for the patch!

Reviewed-by: Maíra Canal <mcanal at igalia.com>

Best Regards,
- Maíra Canal

> ---
>   drivers/gpu/drm/tests/drm_rect_test.c | 72 +++++++++++++++++++++++++++
>   1 file changed, 72 insertions(+)
> 
> diff --git a/drivers/gpu/drm/tests/drm_rect_test.c b/drivers/gpu/drm/tests/drm_rect_test.c
> index a1fd9b2c5128..1269dfc8b756 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/string_helpers.h>
>   #include <linux/errno.h>
> @@ -472,6 +473,76 @@ static void drm_test_rect_calc_vscale(struct kunit *test)
>   	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(0, 0, 5, 5),
> +		.width = 5, .height = 10,
> +		.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 = 5, .height = 10,
> +		.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 = 5, .height = 10,
> +		.expected = DRM_RECT_INIT(0, 0, 10, 5),
> +	},
> +	{
> +		.name = "rotate-180",
> +		.rotation = DRM_MODE_ROTATE_180,
> +		.rect = DRM_RECT_INIT(0, 0, 5, 10),
> +		.width = 5, .height = 10,
> +		.expected = DRM_RECT_INIT(0, 0, 5, 10),
> +	},
> +	{
> +		.name = "rotate-270",
> +		.rotation = DRM_MODE_ROTATE_270,
> +		.rect = DRM_RECT_INIT(0, 0, 5, 10),
> +		.width = 5, .height = 10,
> +		.expected = DRM_RECT_INIT(0, 0, 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 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),
> @@ -480,6 +551,7 @@ static struct kunit_case drm_rect_tests[] = {
>   	KUNIT_CASE_PARAM(drm_test_rect_intersect, drm_rect_intersect_gen_params),
>   	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),
>   	{ }
>   };
>