[i-g-t] tests/kms_vrr: New subtest to swith RR without modeset

[Bhanuprakash Modem]

Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem at intel.com>
---
 tests/kms_vrr.c | 92 +++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 81 insertions(+), 11 deletions(-)

diff --git a/tests/kms_vrr.c b/tests/kms_vrr.c
index f26adbccf..1db305fae 100644
--- a/tests/kms_vrr.c
+++ b/tests/kms_vrr.c
@@ -60,6 +60,13 @@
  * Mega feature: VRR
  * Test category: functionality test
  *
+ * SUBTEST: seamless-rr-switch
+ * Description: Test to switch RR seamlessly without modeset.
+ * Driver requirement: i915, xe
+ * Functionality: adaptive_sync, drrs, lrr
+ * Mega feature: VRR
+ * Test category: functionality test
+ *
  * SUBTEST: negative-basic
  * Description: Make sure that VRR should not be enabled on the Non-VRR panel.
  * Driver requirement: i915, xe
@@ -76,19 +83,13 @@
  */
 #define TEST_DURATION_NS (5000000000ull)
 
-#define DRM_MODE_FMT    "\"%s\": %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x"
-#define DRM_MODE_ARG(m) \
-	(m)->name, (m)->vrefresh, (m)->clock, \
-	(m)->hdisplay, (m)->hsync_start, (m)->hsync_end, (m)->htotal, \
-	(m)->vdisplay, (m)->vsync_start, (m)->vsync_end, (m)->vtotal, \
-	(m)->type, (m)->flags
-
 enum {
 	TEST_BASIC = 1 << 0,
 	TEST_DPMS = 1 << 1,
 	TEST_SUSPEND = 1 << 2,
 	TEST_FLIPLINE = 1 << 3,
-	TEST_NEGATIVE = 1 << 4,
+	TEST_SEAMLESS_RR = 1 << 4,
+	TEST_NEGATIVE = 1 << 5,
 };
 
 typedef struct range {
@@ -173,14 +174,31 @@ output_mode_with_maxrate(igt_output_t *output, unsigned int vrr_max)
 	drmModeConnectorPtr connector = output->config.connector;
 	drmModeModeInfo mode = *igt_output_get_mode(output);
 
-	igt_debug("Default Mode " DRM_MODE_FMT "\n", DRM_MODE_ARG(&mode));
-
 	for (i = 0; i < connector->count_modes; i++)
 		if (connector->modes[i].vrefresh > mode.vrefresh &&
 		    connector->modes[i].vrefresh <= vrr_max)
 			mode = connector->modes[i];
 
-	igt_debug("Override Mode " DRM_MODE_FMT "\n", DRM_MODE_ARG(&mode));
+	igt_info("Override with HIGH_RR Mode: ");
+	kmstest_dump_mode(&mode);
+
+	return mode;
+}
+
+static drmModeModeInfo
+output_mode_with_minrate(igt_output_t *output, unsigned int vrr_min)
+{
+	int i;
+	drmModeConnectorPtr connector = output->config.connector;
+	drmModeModeInfo mode = *igt_output_get_mode(output);
+
+	for (i = 0; i < connector->count_modes; i++)
+		if (connector->modes[i].vrefresh < mode.vrefresh &&
+		    connector->modes[i].vrefresh >= vrr_min)
+			mode = connector->modes[i];
+
+	igt_info("Override with LOW_RR Mode: ");
+	kmstest_dump_mode(&mode);
 
 	return mode;
 }
@@ -496,6 +514,52 @@ test_basic(data_t *data, enum pipe pipe, igt_output_t *output, uint32_t flags)
 	igt_remove_fb(data->drm_fd, &data->fb0);
 }
 
+static void
+test_seamless_rr_basic(data_t *data, enum pipe pipe, igt_output_t *output, uint32_t flags)
+{
+	uint32_t result;
+	vtest_ns_t vtest_ns;
+	range_t range;
+	uint64_t rate;
+	drmModeModeInfo mode;
+
+	prepare_test(data, output, pipe);
+	range = data->range;
+	vtest_ns = get_test_rate_ns(range);
+
+	igt_info("Seamless RR Switch Test execution on %s, PIPE_%s with VRR range: (%u-%u) Hz\n",
+		 igt_output_name(output), kmstest_pipe_name(pipe), range.min, range.max);
+
+	rate = vtest_ns.max;
+	result = flip_and_measure(data, output, pipe, rate, TEST_DURATION_NS);
+	igt_info("Refresh rate (%u Hz) %"PRIu64"ns: Target VRR on threshold not reached, result was %u%%\n",
+		     range.max, rate, result);
+
+	/* Switch to low rr mode without modeset. */
+	mode = output_mode_with_minrate(output, range.min);
+	igt_output_override_mode(output, &mode);
+	igt_assert(igt_display_try_commit_atomic(&data->display, 0, NULL) == 0);
+
+	rate = vtest_ns.min;
+	result = flip_and_measure(data, output, pipe, rate, TEST_DURATION_NS);
+	igt_info("Refresh rate (%u Hz) %"PRIu64"ns: Target VRR on threshold not reached, result was %u%%\n",
+		     range.max, rate, result);
+
+	/* Switch back to high rr mode without modeset. */
+	mode = output_mode_with_maxrate(output, range.max);
+	igt_output_override_mode(output, &mode);
+	igt_assert(igt_display_try_commit_atomic(&data->display, 0, NULL) == 0);
+
+	/* Clean-up */
+	igt_plane_set_fb(data->primary, NULL);
+	igt_output_set_pipe(output, PIPE_NONE);
+	igt_output_override_mode(output, NULL);
+	igt_display_commit2(&data->display, COMMIT_ATOMIC);
+
+	igt_remove_fb(data->drm_fd, &data->fb1);
+	igt_remove_fb(data->drm_fd, &data->fb0);
+}
+
 /* Runs tests on outputs that are VRR capable. */
 static void
 run_vrr_test(data_t *data, test_t test, uint32_t flags)
@@ -569,6 +633,12 @@ igt_main
 	igt_subtest_with_dynamic("negative-basic")
 		run_vrr_test(&data, test_basic, TEST_NEGATIVE);
 
+	igt_describe("Test to switch RR seamlessly without modeset.");
+	igt_subtest_with_dynamic("seamless-rr-switch") {
+		igt_require_intel(data.drm_fd);
+		run_vrr_test(&data, test_seamless_rr_basic, TEST_SEAMLESS_RR);
+	}
+
 	igt_fixture {
 		igt_display_fini(&data.display);
 		drm_close_driver(data.drm_fd);
-- 
2.40.0