[igt-dev] [PATCH i-g-t 2/2] tests/kms_psr2_su: Print debugfs when skipping test

[José Roberto de Souza]

This tests is being sporadically skipped in CI as it is not due
"PSR sink not reliable: yes" lets print the i915_edp_psr_status to
find out the reason.
This can be reverted afterwards.

Reference: https://gitlab.freedesktop.org/drm/intel/-/issues/1911
Cc: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 lib/igt_psr.c       | 13 +++++++++++++
 lib/igt_psr.h       |  1 +
 tests/kms_psr2_su.c |  2 ++
 3 files changed, 16 insertions(+)

diff --git a/lib/igt_psr.c b/lib/igt_psr.c
index 956f6219c..8c2f4ce6c 100644
--- a/lib/igt_psr.c
+++ b/lib/igt_psr.c
@@ -229,3 +229,16 @@ bool psr2_wait_su(int debugfs_fd, uint16_t *num_su_blocks)
 {
 	return igt_wait(psr2_read_last_num_su_blocks_val(debugfs_fd, num_su_blocks), 40, 1);
 }
+
+void psr_print_debugfs(int debugfs_fd)
+{
+	char buf[PSR_STATUS_MAX_LEN];
+	int ret;
+
+	ret = igt_debugfs_simple_read(debugfs_fd, "i915_edp_psr_status", buf,
+				      sizeof(buf));
+	if (ret < 0)
+		return;
+
+	igt_debug("%s", buf);
+}
diff --git a/lib/igt_psr.h b/lib/igt_psr.h
index b2afb6119..8368ecb49 100644
--- a/lib/igt_psr.h
+++ b/lib/igt_psr.h
@@ -43,5 +43,6 @@ bool psr_enable(int device, int debugfs_fd, enum psr_mode);
 bool psr_disable(int device, int debugfs_fd);
 bool psr_sink_support(int device, int debugfs_fd, enum psr_mode mode);
 bool psr2_wait_su(int debugfs_fd, uint16_t *num_su_blocks);
+void psr_print_debugfs(int debugfs_fd);
 
 #endif
diff --git a/tests/kms_psr2_su.c b/tests/kms_psr2_su.c
index a834a96e3..0ee02fc8b 100644
--- a/tests/kms_psr2_su.c
+++ b/tests/kms_psr2_su.c
@@ -261,6 +261,8 @@ igt_main
 		prepare(&data);
 		r = psr_wait_entry(data.debugfs_fd, PSR_MODE_2);
 		cleanup(&data);
+		if (!r)
+			psr_print_debugfs(data.debugfs_fd);
 		igt_require_f(r, "PSR2 can not be enabled\n");
 
 		/* blocking timerfd */
-- 
2.26.2