[PATCH i-g-t] tests/intel/kms_pm_dc: Add a new test to validate the deep sleep state during extended vblank

[Jeevan B <jeevan.b@intel.com>]

Add a new test to validate deep sleep states during extended vblank
scenarios, where two frames are committed simultaneously for a give
time with reduced refresh rate.
v2: dealy of one frame added to simulate extended vblank.
    remove vrr related debug checks.

Signed-off-by: Jeevan B <jeevan.b@intel.com>
---
 tests/intel/kms_pm_dc.c | 49 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/tests/intel/kms_pm_dc.c b/tests/intel/kms_pm_dc.c
index 7766d34d7..9f89e537d 100644
--- a/tests/intel/kms_pm_dc.c
+++ b/tests/intel/kms_pm_dc.c
@@ -584,6 +584,46 @@ static unsigned int read_pkgc_counter(int debugfs_root_fd)
 	return get_dc_counter(str);
 }
 
+static void test_deep_pkgc_state(data_t *data)
+{
+	unsigned int pre_val = 0, cur_val = 0;
+	time_t start = time(NULL), duration = 2, delay;
+	enum pipe pipe;
+	bool pkgc_flag;
+	igt_display_t *display = &data->display;
+	igt_plane_t *primary;
+	igt_output_t *output;
+
+	for_each_pipe_with_valid_output(display, pipe, output) {
+		igt_output_set_pipe(output, pipe);
+		data->output = output;
+		data->mode = igt_output_get_mode(output);
+		setup_videoplayback(data);
+		igt_require(igt_output_has_prop(output, IGT_CONNECTOR_VRR_CAPABLE));
+		igt_require(igt_output_get_prop(output, IGT_CONNECTOR_VRR_CAPABLE));
+
+		primary = igt_output_get_plane_type(data->output,
+						    DRM_PLANE_TYPE_PRIMARY);
+		pre_val = read_pkgc_counter(data->debugfs_root_fd);
+		delay = 1 * ((1000 * 1000) / data->mode->vrefresh);
+		while (time(NULL) - start < duration) {
+			igt_plane_set_fb(primary, &data->fb_rgb);
+			igt_display_commit(&data->display);
+			usleep(delay);
+
+			igt_plane_set_fb(primary, &data->fb_rgr);
+			igt_display_commit(&data->display);
+			cur_val = read_pkgc_counter(data->debugfs_root_fd);
+			if (cur_val > pre_val) {
+				pkgc_flag = true;
+				continue;
+			}
+		}
+	}
+	cleanup_dc3co_fbs(data);
+	igt_assert_f(pkgc_flag, "PKGC10 is not achieved.\n");
+}
+
 static void test_pkgc_state_dpms(data_t *data)
 {
 	unsigned int timeout_sec = 6;
@@ -687,6 +727,15 @@ igt_main
 			test_dc_state_psr(&data, CHECK_DC6);
 	}
 
+	igt_describe("This test validates display engine entry to DC8 state "
+		     "while extended vblank");
+	igt_subtest("deep-pkgc") {
+		igt_require_f(igt_pm_pc8_plus_residencies_enabled(data.msr_fd),
+			      "PC8+ residencies not supported\n");
+		igt_require(intel_display_ver(data.devid) >= 20);
+		test_deep_pkgc_state(&data);
+	}
+
 	igt_describe("This test validates display engine entry to DC5 state "
 		     "while all connectors's DPMS property set to OFF");
 	igt_subtest("dc5-dpms") {
-- 
2.25.1