[PATCH i-g-t] kms_vrr: Add comment explaining PR and LOBF dependency

[Jeevan B]

Add a comment to explain that LOBF requires PR support,
which is only available on eDP 1.5 panels.

Signed-off-by: Jeevan B <jeevan.b at intel.com>
---
 tests/kms_vrr.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/kms_vrr.c b/tests/kms_vrr.c
index 4919b7cb7..b7600ae2c 100644
--- a/tests/kms_vrr.c
+++ b/tests/kms_vrr.c
@@ -1049,6 +1049,10 @@ run_vrr_test(data_t *data, test_t test, uint32_t flags)
 				continue;
 			}
 
+			/* Panel Replay is supported only with eDP 1.5 panels.
+			 * LOBF and PR are mutually exclusive features.
+			 * Skip the test if PR is not supported, as LOBF cannot be enabled.
+			 */
 			if (flags == TEST_LINK_OFF)
 				igt_require_f(psr_sink_support(data->drm_fd,
 					      data->debugfs_fd, PR_MODE, output),
-- 
2.43.0