[PATCH] drm/selftest:- Adding a new format(whose cpp=0) to be tested by igt_check_drm_format_min_pitch

[Ayan Halder <Ayan.Halder@arm.com>]

We have introduced some new formats DRM_FORMAT_VUY101010, DRM_FORMAT_YUV420_8BIT,
and DRM_FORMAT_YUV420_10BIT whose cpp is 0 (as they are defined in bits per pixel).
We need to ensure that the pitch returned by drm_format_info_min_pitch() for such
formats is always 0.

Signed-off-by: Ayan Kumar halder <ayan.halder@arm.com>
Depends on:- https://patchwork.freedesktop.org/patch/msgid/1552414556-5756-1-git-send-email-ayan.halder@arm.com
---
 drivers/gpu/drm/selftests/test-drm_format.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/selftests/test-drm_format.c b/drivers/gpu/drm/selftests/test-drm_format.c
index c5e212a..155e4ce 100644
--- a/drivers/gpu/drm/selftests/test-drm_format.c
+++ b/drivers/gpu/drm/selftests/test-drm_format.c
@@ -276,5 +276,14 @@ int igt_check_drm_format_min_pitch(void *ignored)
 	FAIL_ON(drm_format_info_min_pitch(info, 0, UINT_MAX - 1) !=
 			(uint64_t)(UINT_MAX - 1) * 2);
 
+	/* Test format with cpp/char_per_block 0 */
+	info = drm_format_info(DRM_FORMAT_VUY101010);
+	FAIL_ON(!info);
+	FAIL_ON(drm_format_info_min_pitch(info, 0, 0) != 0);
+	FAIL_ON(drm_format_info_min_pitch(info, -1, 0) != 0);
+	FAIL_ON(drm_format_info_min_pitch(info, 1, 0) != 0);
+	FAIL_ON(drm_format_info_min_pitch(info, 0, 1) != 0);
+	FAIL_ON(drm_format_info_min_pitch(info, 0, UINT_MAX) != 0);
+
 	return 0;
 }
-- 
2.7.4