[PATCH i-g-t v5 2/2] tests/kms_atomic_transition: Reducing debug loglevel dynamically

[Pranay Samala <pranay.samala@intel.com>]

This test is debug logs are too much and was killed
due to exceeding disk usage limit on the less disk
space machines.

So dynamically reducing the debug log level to 13.

v2:
- Using "" for the defined header file (Bhanu)
- Not using exit handler in this file (Bhanu)
- Not using any magic number (Bhanu)

v3:
- Calling loglevel init functionality in lib file (Bhanu)
- Here 2 means the log level will be reduced by 2 (Bhanu)

v4:
- Send the required debuglevel to directly to api only if debug
  log level is greater than 10 (Bhanu)

v5:
- Add a check to open_params function as it may return -1
  on failure (Bhanu)

Signed-off-by: Pranay Samala <pranay.samala@intel.com>
---
 tests/kms_atomic_transition.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tests/kms_atomic_transition.c b/tests/kms_atomic_transition.c
index 29dd8ac4e..f7f1edd31 100644
--- a/tests/kms_atomic_transition.c
+++ b/tests/kms_atomic_transition.c
@@ -34,6 +34,7 @@
 #include "igt_rand.h"
 #include "drmtest.h"
 #include "sw_sync.h"
+#include "igt_sysfs.h"
 #include <errno.h>
 #include <pthread.h>
 #include <stdbool.h>
@@ -1174,6 +1175,8 @@ igt_main_args("", long_opts, help_str, opt_handler, &data)
 	int pipe_count = 0;
 
 	igt_fixture {
+		int dir, current_log_level;
+
 		data.drm_fd = drm_open_driver_master(DRIVER_ANY);
 
 		kmstest_set_vt_graphics_mode();
@@ -1185,6 +1188,16 @@ igt_main_args("", long_opts, help_str, opt_handler, &data)
 
 		for_each_connected_output(&data.display, output)
 			count++;
+
+		dir = igt_sysfs_drm_module_params_open();
+		if (dir < 0)
+			return;
+
+		current_log_level = igt_drm_debug_level_get(dir);
+		close(dir);
+
+		if (current_log_level > 10)
+			igt_drm_debug_level_update(10);
 	}
 
 	igt_describe("Check toggling of primary plane with vblank");
-- 
2.34.1