tests/pc8: add modeset -stress-no-wait tests

Used to trigger a racing condition between mode setting and
enabling/disabling PC8. The modeset-lpsp-stress-no-wait test should
fail on Kernels without the fix I just wrote today.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>

diff --git a/tests/pc8.c b/tests/pc8.c
index eb9e998..7cff378 100644 (file)
--- a/tests/pc8.c
+++ b/tests/pc8.c
@@ -638,7 +638,7 @@ static void basic_subtest(void)
                     "PC8+ residency didn't stop with screen enabled.\n");
 }
 
-static void modeset_subtest(bool lpsp, bool stress)
+static void modeset_subtest(bool lpsp, bool stress, bool wait_for_residency)
 {
        int i, rounds;
        enum screen_type type;
@@ -648,12 +648,14 @@ static void modeset_subtest(bool lpsp, bool stress)
 
        for (i = 0; i < rounds; i++) {
                disable_all_screens(&ms_data);
-               igt_assert(pc8_plus_enabled());
+               if (wait_for_residency)
+                       igt_assert(pc8_plus_enabled());
 
                /* If we skip this line it's because the type of screen we want
                 * is not connected. */
                igt_require(enable_one_screen_with_type(&ms_data, type));
-               igt_assert(pc8_plus_disabled());
+               if (wait_for_residency)
+                       igt_assert(pc8_plus_disabled());
        }
 }
 
@@ -799,9 +801,9 @@ int main(int argc, char *argv[])
        igt_subtest("drm-resources-equal")
                drm_resources_equal_subtest();
        igt_subtest("modeset-lpsp")
-               modeset_subtest(true, false);
+               modeset_subtest(true, false, true);
        igt_subtest("modeset-non-lpsp")
-               modeset_subtest(false, false);
+               modeset_subtest(false, false, true);
        igt_subtest("batch")
                batch_subtest();
        igt_subtest("i2c")
@@ -809,7 +811,11 @@ int main(int argc, char *argv[])
        igt_subtest("stress-test")
                stress_test();
        igt_subtest("modeset-non-lpsp-stress")
-               modeset_subtest(false, true);
+               modeset_subtest(false, true, true);
+       igt_subtest("modeset-lpsp-stress-no-wait")
+               modeset_subtest(true, true, false);
+       igt_subtest("modeset-non-lpsp-stress-no-wait")
+               modeset_subtest(false, true, false);
        igt_subtest("register-compare") {
                igt_require(do_register_compare);
                register_compare_subtest();