[PATCH i-g-t 3/6] tests/kms_flip: limit output pairs when testing suspend

["Michał Grzelak" <michal.grzelak@intel.com>]

Currently 2x- subtests can still exceed timeout, even with limited
number of pipes used. It can be seen when number of outputs is greater
than 3.

Default to testing at max 3 pairs of outputs. Add a commandline
parameter enabling suspend testing on all possible output pairs. Add a
LIMIT_PAIR macro which controls maximum number of output pairs to test.

Signed-off-by: Michał Grzelak <michal.grzelak@intel.com>
---
 tests/kms_flip.c | 32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)

diff --git a/tests/kms_flip.c b/tests/kms_flip.c
index d09813f02..917c5ed6f 100755
--- a/tests/kms_flip.c
+++ b/tests/kms_flip.c
@@ -263,11 +263,14 @@
 #define RUN_TEST		1
 #define RUN_PAIR		2
 
+#define PAIR_LIMIT 		3
+
 #ifndef DRM_CAP_TIMESTAMP_MONOTONIC
 #define DRM_CAP_TIMESTAMP_MONOTONIC 6
 #endif
 
 static bool all_crtcs = false;
+static bool all_pairs = false;
 
 drmModeRes *resources;
 int drm_fd;
@@ -1904,6 +1907,7 @@ static void run_pair(int duration, int flags)
 {
 	struct test_output o;
 	int i, j, m, n, modes = 0;
+	int pair_count = 0;
 
 	/* No tiling support in XE. */
 	if (is_xe_device(drm_fd) && flags & TEST_FENCE_STRESS)
@@ -1966,6 +1970,16 @@ static void run_pair(int duration, int flags)
 				for (m = n + 1; m < resources->count_crtcs; m++) {
 					int crtc_idxs[2];
 
+					/* Limit the execution to 2 CRTCs (first & last) for hang and suspend tests */
+					if (((flags & TEST_HANG) || (flags & TEST_SUSPEND)) && !all_crtcs &&
+					    ((n != 0 && n != resources->count_crtcs) ||
+					    m != resources->count_crtcs - 1))
+						continue;
+
+					/* Limit number of suspend tests */
+					if ((flags & TEST_SUSPEND) && !all_pairs && pair_count >= PAIR_LIMIT)
+						continue;
+
 					memset(&o, 0, sizeof(o));
 					o.count = 2;
 					o._connector[0] = resources->connectors[i];
@@ -1977,16 +1991,18 @@ static void run_pair(int duration, int flags)
 					crtc_idxs[0] = n;
 					crtc_idxs[1] = m;
 
-					/* Limit the execution to 2 CRTCs (first & last) for hang and suspend tests */
-					if (((flags & TEST_HANG) || (flags & TEST_SUSPEND)) && !all_crtcs &&
-					    ((n != 0 && n != resources->count_crtcs) ||
-					    m != resources->count_crtcs - 1))
+					connector_find_compatible_mode(n, m, &o);
+
+					if (!o.mode_valid) {
+						free_test_output(&o);
 						continue;
+					}
 
 					run_test_on_crtc_set(&o, crtc_idxs,
 							     RUN_PAIR,
 							     resources->count_crtcs,
 							     duration);
+					pair_count++;
 				}
 			}
 		}
@@ -2044,6 +2060,9 @@ static int opt_handler(int opt, int opt_index, void *data)
 		case 'e':
 			all_crtcs = true;
 			break;
+		case 'p':
+			all_pairs = true;
+			break;
 		default:
 			return IGT_OPT_HANDLER_ERROR;
 	}
@@ -2052,9 +2071,10 @@ static int opt_handler(int opt, int opt_index, void *data)
 }
 
 const char *help_str =
-	"  -e \tRun on all CRTCs. (By default subtests will run on two CRTCs)\n";
+	"  -e \tRun on all CRTCs. (By default subtests will run on two CRTCs)\n"
+	"  -p \tRun on all output pairs. (By default 2x-* suspend subtests will run on 3 pairs)\n";
 
-int igt_main_args("e", NULL, help_str, opt_handler, NULL)
+int igt_main_args("ep", NULL, help_str, opt_handler, NULL)
 {
 	struct {
 		int duration;
-- 
2.45.2