igt/kms_addfb_basic: Skip if the KMS interface is not supported

Some drivers and some hardware do not support KMS and so the addfb
ioctls are expected to fail. However, since they are expected to fail
with a specific errno (ENOTSUP) in the case KMS is not supported on the
fd, we can check for that and skip the tests where they are not
appropriate.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

1 files changed, 26 insertions, 1 deletions

diff --git a/tests/kms_addfb_basic.c b/tests/kms_addfb_basic.c
index ce48d24f..400241a9 100644
--- a/tests/kms_addfb_basic.c
+++ b/tests/kms_addfb_basic.c
@@ -667,12 +667,37 @@ static void prop_tests(int fd)
 
 }
 
+static bool has_addfb2_iface(int fd)
+{
+	struct local_drm_mode_fb_cmd2 f = {};
+	int err;
+
+	err = 0;
+	if (drmIoctl(fd, DRM_IOCTL_MODE_ADDFB2, &f))
+		err = -errno;
+	switch (err) {
+	case -ENOTTY: /* ioctl unrecognised (kernel too old) */
+	case -ENOTSUP: /* driver doesn't support KMS */
+		return false;
+
+		/*
+		 * The only other valid response is -EINVAL, but we leave
+		 * that for the actual tests themselves to discover for
+		 * more accurate reporting.
+		 */
+	default:
+		return true;
+	}
+}
+
 int fd;
 
 igt_main
 {
-	igt_fixture
+	igt_fixture {
 		fd = drm_open_driver_master(DRIVER_ANY);
+		igt_require(has_addfb2_iface(fd));
+	}
 
 	invalid_tests(fd);