[igt-dev] [RFC, i-g-t] tests/kms_vrr: New VRR test to toggle the VRR during fastsets

[Nidhi Gupta <nidhi1.gupta@intel.com>]

Allow VRR to be toggled during fastsets, without
the need of full modeset.

Signed-off-by: Nidhi Gupta <nidhi1.gupta@intel.com>
---
 tests/kms_vrr.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/tests/kms_vrr.c b/tests/kms_vrr.c
index d2d79c4e..ea6528e1 100644
--- a/tests/kms_vrr.c
+++ b/tests/kms_vrr.c
@@ -45,7 +45,8 @@ enum {
 	TEST_DPMS = 1 << 1,
 	TEST_SUSPEND = 1 << 2,
 	TEST_FLIPLINE = 1 << 3,
-	TEST_NEGATIVE = 1 << 4,
+	TEST_FASTSET = 1 << 4,
+	TEST_NEGATIVE = 1 << 5,
 };
 
 typedef struct range {
@@ -193,11 +194,14 @@ static bool vrr_capable(igt_output_t *output)
 }
 
 /* Toggles variable refresh rate on the pipe. */
-static void set_vrr_on_pipe(data_t *data, enum pipe pipe, bool enabled)
+static void set_vrr_on_pipe(data_t *data, enum pipe pipe,
+			    bool need_modeset, bool enabled)
 {
 	igt_pipe_set_prop_value(&data->display, pipe, IGT_CRTC_VRR_ENABLED,
 				enabled);
-	igt_display_commit2(&data->display, COMMIT_ATOMIC);
+
+	if (need_modeset)
+		igt_display_commit2(&data->display, COMMIT_ATOMIC);
 }
 
 /* Prepare the display for testing on the given pipe. */
@@ -370,7 +374,7 @@ test_basic(data_t *data, enum pipe pipe, igt_output_t *output, uint32_t flags)
 	igt_info("VRR Test execution on %s, PIPE_%s with VRR range: (%u-%u) Hz\n",
 		 output->name, kmstest_pipe_name(pipe), range.min, range.max);
 
-	set_vrr_on_pipe(data, pipe, true);
+	set_vrr_on_pipe(data, pipe, (flags & ~TEST_FASTSET), true);
 
 	/*
 	 * Do a short run with VRR, but don't check the result.
@@ -436,7 +440,7 @@ test_basic(data_t *data, enum pipe pipe, igt_output_t *output, uint32_t flags)
 	 * modeset. And the expected behavior is the same as disabling VRR on
 	 * a VRR capable panel.
 	 */
-	set_vrr_on_pipe(data, pipe, (flags & TEST_NEGATIVE)? true : false);
+	set_vrr_on_pipe(data, pipe, (flags & ~TEST_FASTSET), (flags & TEST_NEGATIVE)? true : false);
 	rate = vtest_ns.mid;
 	result = flip_and_measure(data, output, pipe, rate, TEST_DURATION_NS);
 	igt_assert_f(result < 10,
@@ -526,6 +530,13 @@ igt_main
 	igt_subtest_with_dynamic("negative-basic")
 		run_vrr_test(&data, test_basic, TEST_NEGATIVE);
 
+	igt_fixture
+		igt_require_intel(data.drm_fd);
+
+	igt_describe("Tests that VRR basic without modeset");
+	igt_subtest_with_dynamic("flip-basic-fastset")
+		run_vrr_test(&data, test_basic, TEST_FASTSET);
+
 	igt_fixture {
 		igt_display_fini(&data.display);
 	}
-- 
2.39.0