[PATCH v5 20/44] drm/tests: Add a few tests around drm_fixed.h

[Jeff Johnson]

On 8/19/24 13:56, Harry Wentland wrote:
> While working on the CTM implementation of VKMS I had to ascertain
> myself of a few assumptions. One of those is whether drm_fixed.h
> treats its numbers using signed-magnitude or twos-complement. It is
> twos-complement.
> 
> In order to make someone else's day easier I am adding the
> drm_test_int2fixp test that validates the above assumption.
> 
> I am also adding a test for the new sm2fixp function that converts
> from a signed-magnitude fixed point to the twos-complement fixed
> point.
> 
> Signed-off-by: Harry Wentland <harry.wentland at amd.com>
> ---
>  drivers/gpu/drm/tests/Makefile        |  3 +-
>  drivers/gpu/drm/tests/drm_fixp_test.c | 69 +++++++++++++++++++++++++++
>  2 files changed, 71 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/gpu/drm/tests/drm_fixp_test.c
> 
> diff --git a/drivers/gpu/drm/tests/Makefile b/drivers/gpu/drm/tests/Makefile
> index 56dab563abd7..bd69df0eee33 100644
> --- a/drivers/gpu/drm/tests/Makefile
> +++ b/drivers/gpu/drm/tests/Makefile
> @@ -20,6 +20,7 @@ obj-$(CONFIG_DRM_KUNIT_TEST) += \
>  	drm_modes_test.o \
>  	drm_plane_helper_test.o \
>  	drm_probe_helper_test.o \
> -	drm_rect_test.o
> +	drm_rect_test.o	\
> +	drm_fixp_test.o
>  
>  CFLAGS_drm_mm_test.o := $(DISABLE_STRUCTLEAK_PLUGIN)
> diff --git a/drivers/gpu/drm/tests/drm_fixp_test.c b/drivers/gpu/drm/tests/drm_fixp_test.c
> new file mode 100644
> index 000000000000..f420f173ff66
> --- /dev/null
> +++ b/drivers/gpu/drm/tests/drm_fixp_test.c
> @@ -0,0 +1,69 @@
...
> +MODULE_AUTHOR("AMD");
> +MODULE_LICENSE("GPL and additional rights");
> \ No newline at end of file

Please add the missing MODULE_DESCRIPTION()