[PATCH v2 0/6] Increase code coverage on drm_format_helper.c

[Arthur Grillo]

The following series include improvements and new KUnit tests to some
functions on drm_format_helper.c.

The first patch improves existing conversion tests to assure that the
default pitch is used when NULL is used on the `dst_pitch` argument.

Patches 2, 3, 4, and 6 add the new parametrized tests to the following
functions:

- drm_fb_swab()
- drm_fb_clip_offset()
- drm_fb_build_fourcc_list()
- drm_fb_memcpy()

The 5th patch is a change to the conversion_buf_size() helper used on
the tests, this change was needed to make the patch 6.

a coverage report for the file can be found below:
https://grillo-0.github.io/coverage-reports/gsoc-drm-format-test/drivers/gpu/drm/drm_format_helper.c.gcov.html

Signed-off-by: Arthur Grillo <arthurgrillo at riseup.net>
---

v1->v2: https://lore.kernel.org/r/20230721182316.560649-1-arthurgrillo@riseup.net
- Change patch prefix to "drm/tests" (Maíra Canal)
- Simplify the code by changing to an ternary operator on the
  pitch (Maíra Canal)
- Explain how the expected swab colors were obtained (André Almeida)
- Fix multi-line comment style (André Almeida)
- Remove unnecessary use of drm_kunit_helper_free_device() (Maíra Canal)
- Hard-code the expected number of fourcss (Maíra Canal & Andre Almeida)
- Fix some sparce warnings (kernel test robot)

---
Arthur Grillo (6):
      drm/tests: Test default pitch fallback
      drm/tests: Add KUnit tests for drm_fb_swab()
      drm/tests: Add KUnit tests for drm_fb_clip_offset()
      drm/tests: Add KUnit tests for drm_fb_build_fourcc_list()
      drm/tests: Add multi-plane support to conversion_buf_size()
      drm/tests: Add KUnit tests for drm_fb_memcpy()

 drivers/gpu/drm/tests/drm_format_helper_test.c | 848 +++++++++++++++++++++++--
 1 file changed, 790 insertions(+), 58 deletions(-)
---
base-commit: b31f784ffff96643fa6dec31b182a3466cf4139e
change-id: 20230810-gsoc-drm-format-test-v2-1989f08e115b

Best regards,
-- 
Arthur Grillo <arthurgrillo at riseup.net>