[PATCH v5 03/44] drm/vkms: Add kunit tests for VKMS LUT handling

[Jeff Johnson]

On 8/19/24 13:56, Harry Wentland wrote:
> Debugging LUT math is much easier when we can unit test
> it. Add kunit functionality to VKMS and add tests for
>  - get_lut_index
>  - lerp_u16
> 
> v5:
>  - Bring back static for lerp_u16 and get_lut_index (Arthur)
> 
> v4:
>  - Test the critical points of the lerp function (Pekka)
> 
> v3:
>  - Use include way of testing static functions (Arthur)

note version information is usually after the "---" so that it not part
of the final git history

> 
> Signed-off-by: Harry Wentland <harry.wentland at amd.com>
> Cc: Arthur Grillo <arthurgrillo at riseup.net>
> ---
>  drivers/gpu/drm/vkms/Kconfig                  |   5 +
>  drivers/gpu/drm/vkms/tests/.kunitconfig       |   4 +
>  drivers/gpu/drm/vkms/tests/vkms_color_tests.c | 163 ++++++++++++++++++
>  drivers/gpu/drm/vkms/vkms_composer.c          |   4 +
>  4 files changed, 176 insertions(+)
>  create mode 100644 drivers/gpu/drm/vkms/tests/.kunitconfig
>  create mode 100644 drivers/gpu/drm/vkms/tests/vkms_color_tests.c
> 
> diff --git a/drivers/gpu/drm/vkms/Kconfig b/drivers/gpu/drm/vkms/Kconfig
> index b9ecdebecb0b..c1f8b343ff0e 100644
> --- a/drivers/gpu/drm/vkms/Kconfig
> +++ b/drivers/gpu/drm/vkms/Kconfig
> @@ -13,3 +13,8 @@ config DRM_VKMS
>  	  a VKMS.
>  
>  	  If M is selected the module will be called vkms.
> +
> +config DRM_VKMS_KUNIT_TESTS
> +	tristate "Tests for VKMS" if !KUNIT_ALL_TESTS
> +	depends on DRM_VKMS && KUNIT
> +	default KUNIT_ALL_TESTS
> diff --git a/drivers/gpu/drm/vkms/tests/.kunitconfig b/drivers/gpu/drm/vkms/tests/.kunitconfig
> new file mode 100644
> index 000000000000..70e378228cbd
> --- /dev/null
> +++ b/drivers/gpu/drm/vkms/tests/.kunitconfig
> @@ -0,0 +1,4 @@
> +CONFIG_KUNIT=y
> +CONFIG_DRM=y
> +CONFIG_DRM_VKMS=y
> +CONFIG_DRM_VKMS_KUNIT_TESTS=y
> diff --git a/drivers/gpu/drm/vkms/tests/vkms_color_tests.c b/drivers/gpu/drm/vkms/tests/vkms_color_tests.c
> new file mode 100644
> index 000000000000..fc73e48aa57c
> --- /dev/null
> +++ b/drivers/gpu/drm/vkms/tests/vkms_color_tests.c
...
> +kunit_test_suite(vkms_color_test_suite);
> +
> +MODULE_LICENSE("GPL");
> \ No newline at end of file

Since commit 1fffe7a34c89 ("script: modpost: emit a warning when the
description is missing"), a module without a MODULE_DESCRIPTION() will
result in a warning when built with make W=1. Recently, multiple
developers have been eradicating these warnings treewide, and very few
are left, so please don't introduce a new one :)

Please add the missing MODULE_DESCRIPTION()

/jeff