[PATCH v2] tests/intel: Enhance the wedged_mode sysfs support

[Pravalika Gurram <pravalika.gurram@intel.com>]

1. Added support to read the wedged_mode sysfs
2. Handle the -ETIMEDOUT return value during
forcewake_all sysfs open

Signed-off-by: Pravalika Gurram <pravalika.gurram@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
---
 tests/intel/xe_debugfs.c |  2 +-
 tests/intel/xe_wedged.c  | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/tests/intel/xe_debugfs.c b/tests/intel/xe_debugfs.c
index bcbb5036a..3a83868ba 100644
--- a/tests/intel/xe_debugfs.c
+++ b/tests/intel/xe_debugfs.c
@@ -268,7 +268,7 @@ test_forcewake(int fd)
 {
 	int handle = igt_debugfs_open(fd, "forcewake_all", O_WRONLY);
 
-	igt_assert_neq(handle, -1);
+	igt_assert_lte(0, handle);
 	close(handle);
 }
 
diff --git a/tests/intel/xe_wedged.c b/tests/intel/xe_wedged.c
index 613d571b4..844ab2809 100644
--- a/tests/intel/xe_wedged.c
+++ b/tests/intel/xe_wedged.c
@@ -203,11 +203,16 @@ simple_hang(int fd, struct drm_xe_sync *sync)
  * SUBTEST: wedged-mode-toggle
  * Description: Test wedged.mode=1 after testing wedged.mode=2
  */
+/**
+ * SUBTEST: basic-wedged-read
+ * Description: Read wedged debugfs
+ */
 igt_main
 {
 	struct drm_xe_engine_class_instance *hwe;
 	int fd;
 	char pci_slot[NAME_MAX];
+	char str[150];
 
 	igt_fixture {
 		fd = drm_open_driver(DRIVER_XE);
@@ -279,6 +284,13 @@ igt_main
 		igt_assert_eq(simple_ioctl(fd), 0);
 	}
 
+	igt_subtest_f("basic-wedged-read") {
+		igt_require(igt_debugfs_exists(fd, "wedged_mode", O_RDONLY));
+
+		igt_debugfs_read(fd, "wedged_mode", str);
+		igt_assert_f(str[0] != '\0', "Failed to read wedged_mode from debugfs!\n");
+	}
+
 	igt_fixture {
 		if (igt_debugfs_exists(fd, "fail_gt_reset/probability", O_RDWR)) {
 			igt_debugfs_write(fd, "fail_gt_reset/probability", "0");
-- 
2.34.1