[PATCH i-g-t 1/2] tests/debugfs_test: Try to light all outputs to increase chances of finding fails.

[Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>]

Make sure read_all_entries has all outputs possible enabled, but also
add a test that runs with all outputs disabled.

This will maximize coverage of debugfs reading, and allows the test not
to be dependent on fbcon for setup.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
---
 tests/debugfs_test.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/tests/debugfs_test.c b/tests/debugfs_test.c
index 5e7805e1559e..bf1c5a1b5390 100644
--- a/tests/debugfs_test.c
+++ b/tests/debugfs_test.c
@@ -78,15 +78,48 @@ static void read_and_discard_sysfs_entries(int path_fd)
 igt_main
 {
 	int fd = -1, debugfs;
+	igt_display_t display;
+
 	igt_skip_on_simulation();
 
 	igt_fixture {
 		fd = drm_open_driver_master(DRIVER_INTEL);
 		igt_require_gem(fd);
 		debugfs = igt_debugfs_dir(fd);
+
+		kmstest_set_vt_graphics_mode();
+		igt_display_init(&display, fd);
 	}
 
 	igt_subtest("read_all_entries") {
+		enum pipe pipe;
+
+		/* try to light all pipes */
+		for_each_pipe(&display, pipe) {
+			igt_output_t *output;
+
+			for_each_valid_output_on_pipe(&display, pipe, output) {
+				if (output->pending_pipe != PIPE_NONE)
+					continue;
+
+				igt_output_set_pipe(output, pipe);
+				break;
+			}
+		}
+
+		igt_display_commit2(&display, display.is_atomic ? COMMIT_ATOMIC : COMMIT_LEGACY);
+
+		read_and_discard_sysfs_entries(debugfs);
+	}
+
+	igt_subtest("read_all_entries_display_off") {
+		igt_output_t *output;
+
+		for_each_connected_output(&display, output)
+			igt_output_set_pipe(output, PIPE_NONE);
+
+		igt_display_commit2(&display, display.is_atomic ? COMMIT_ATOMIC : COMMIT_LEGACY);
+
 		read_and_discard_sysfs_entries(debugfs);
 	}
 
@@ -112,6 +145,7 @@ igt_main
 	}
 
 	igt_fixture {
+		igt_display_fini(&display);
 		close(debugfs);
 		close(fd);
 	}
-- 
2.14.1

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