[PATCH i-g-t v1] tests/kms_plane_alpha_blend : print reason for test skips

[sumit kishore <sumit.kishore@intel.com>]

Print debug message when tests are skipping on headless display systems

Signed-off-by: sumit kishore <sumit.kishore@intel.com>
---
 tests/kms_plane_alpha_blend.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tests/kms_plane_alpha_blend.c b/tests/kms_plane_alpha_blend.c
index 41a3b71c3..82d8eac62 100644
--- a/tests/kms_plane_alpha_blend.c
+++ b/tests/kms_plane_alpha_blend.c
@@ -753,9 +753,11 @@ const char *help_str =
 int igt_main_args("e", NULL, help_str, opt_handler, NULL)
 {
 	data_t data = {};
+	bool active_display = false;
 
 	igt_fixture() {
 		igt_crtc_t *crtc;
+		igt_output_t *output;
 
 		last_pipe = 0;
 
@@ -764,6 +766,13 @@ int igt_main_args("e", NULL, help_str, opt_handler, NULL)
 		igt_display_require(&data.display, data.gfx_fd);
 		igt_require(data.display.is_atomic);
 
+		/* Check if at least one active display connected */
+		for_each_connected_output(&data.display, output) {
+			active_display = true;
+			break;
+		}
+		igt_require_f(active_display, "No active display connected, skipping test\n");
+
 		/* Get active pipes. */
 		for_each_crtc(&data.display, crtc)
 			active_pipes[last_pipe++] = crtc->pipe;
-- 
2.43.0