[igt-dev] [PATCH i-g-t] tests/kms_plane_scaling: Only set rotation if rotation != rotate-0

[Juha-Pekka Heikkila]

Look ok to me. I didn't spot any of those ci shard run failures to 
relate to this change.

Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>

On 3.5.2023 23.32, Maíra Canal wrote:
> If you run the kms_plane_scaling tests on drivers that don't support the
> rotation property, you end up getting the following error:
> 
> (kms_plane_scaling:29327) igt_kms-CRITICAL: Test assertion failure function
> igt_atomic_prepare_plane_commit, file ../lib/igt_kms.c:3309:
> (kms_plane_scaling:29327) igt_kms-CRITICAL: Failed assertion: plane->props[i]
> (kms_plane_scaling:29327) igt_kms-CRITICAL: Last errno: 38, Function not implemented
> Dynamic subtest pipe-A-Virtual-1 failed.
> 
> This error indicates that the rotation property is not implemented in
> the driver, making the test fail instead of skip/pass. This happens
> because, even if the test don't test rotation, it sets the rotation to
> IGT_ROTATE_0.
> 
> Therefore, before setting the rotation property, verify if the
> rotation parameter is IGT_ROTATE_0. Only set the rotation property if
> the rotation is different than IGT_ROTATE_0. This way the
> kms_plane_scaling tests will skip/pass gracefully even without the
> rotation property implemented.
> 
> Signed-off-by: Maíra Canal <mcanal at igalia.com>
> ---
>   tests/kms_plane_scaling.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/tests/kms_plane_scaling.c b/tests/kms_plane_scaling.c
> index a37abd16..0e7cd4a2 100644
> --- a/tests/kms_plane_scaling.c
> +++ b/tests/kms_plane_scaling.c
> @@ -441,7 +441,8 @@ static void check_scaling_pipe_plane_rot(data_t *d, igt_plane_t *plane,
>   	else
>   		igt_plane_set_size(plane, width, height);
>   
> -	igt_plane_set_rotation(plane, rot);
> +	if (rot != IGT_ROTATION_0)
> +		igt_plane_set_rotation(plane, rot);
>   	commit_ret = igt_display_try_commit2(display, COMMIT_ATOMIC);
>   
>   	igt_plane_set_fb(plane, NULL);