drm/selftests: Add tests for drm_format_info* helpers

Add selftests for the following newly added functions:
 - drm_format_info_block_width
 - drm_format_info_block_height
 - drm_format_info_min_pitch
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181101151051.1509-6-alexandru-cosmin.gheorghe@arm.com

drivers/gpu/drm/selftests/Makefile

-test-drm_modeset-y := test-drm_modeset_common.o test-drm_plane_helper.o
+test-drm_modeset-y := test-drm_modeset_common.o test-drm_plane_helper.o \
+                      test-drm_format.o
 
 obj-$(CONFIG_DRM_DEBUG_SELFTEST) += test-drm_mm.o test-drm_modeset.o

drivers/gpu/drm/selftests/drm_modeset_selftests.h

@@ -7,3 +7,6 @@
  * Tests are executed in order by igt/drm_selftests_helper
  */
 selftest(check_plane_state, igt_check_plane_state)
+selftest(check_drm_format_block_width, igt_check_drm_format_block_width)
+selftest(check_drm_format_block_height, igt_check_drm_format_block_height)
+selftest(check_drm_format_min_pitch, igt_check_drm_format_min_pitch)

drivers/gpu/drm/selftests/test-drm_modeset_common.h

@@ -14,5 +14,8 @@
 #define FAIL_ON(x) FAIL((x), "%s", "FAIL_ON(" __stringify(x) ")\n")
 
 int igt_check_plane_state(void *ignored);
+int igt_check_drm_format_block_width(void *ignored);
+int igt_check_drm_format_block_height(void *ignored);
+int igt_check_drm_format_min_pitch(void *ignored);
 
 #endif