[PATCH v2 2/2] tests/intel/kms_pm_dc: Add DC5 PSR suspend/resume validation test

[Mohammed Thasleem <mohammed.thasleem@intel.com>]

This test validates display engine entry to DC5 state while PSR is active,
performs suspend/resume cycle, and verifies DC5 entry is restored after
resume.

Signed-off-by: Mohammed Thasleem <mohammed.thasleem@intel.com>
---
 tests/intel/kms_pm_dc.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/tests/intel/kms_pm_dc.c b/tests/intel/kms_pm_dc.c
index fde16ebf7..8cdbfad9f 100644
--- a/tests/intel/kms_pm_dc.c
+++ b/tests/intel/kms_pm_dc.c
@@ -80,6 +80,10 @@
  *
  * SUBTEST: dc5-dpms-suspend-resume
  * Description: This test validate DC5 state entry before and after suspend/resume cycle using DPMS
+ *
+ * SUBTEST: dc5-psr-suspend-resume
+ * Description: This test validates display engine entry to DC5 state while PSR is active
+ *               before and after respend/resume cycle
  */
 
 /* DC State Flags */
@@ -732,6 +736,13 @@ static void test_dc5_dpms_suspend_resume(data_t *data, int dc_flag)
 
 }
 
+static void test_dc5_psr_suspend_resume(data_t *data, int dc_flag)
+{
+	test_dc_state_psr(data, dc_flag);
+	igt_system_suspend_autoresume(SUSPEND_STATE_MEM, SUSPEND_TEST_NONE);
+	test_dc_state_psr(data, dc_flag);
+}
+
 static void kms_poll_state_restore(int sig)
 {
 	int sysfs_fd;
@@ -857,6 +868,16 @@ int igt_main()
 	igt_subtest("dc5-dpms-suspend-resume")
 		test_dc5_dpms_suspend_resume(&data, CHECK_DC5);
 
+	igt_describe("This test validates display engine entry to DC5 state "
+		     "while PSR is active before and after suspend/resume cycle");
+	igt_subtest("dc5-psr-suspend-resume") {
+		igt_require(psr_sink_support(data.drm_fd, data.debugfs_fd,
+					     PSR_MODE_1, NULL));
+		data.op_psr_mode = PSR_MODE_1;
+		psr_enable(data.drm_fd, data.debugfs_fd, data.op_psr_mode, NULL);
+		test_dc5_psr_suspend_resume(&data, CHECK_DC5);
+	}
+
 	igt_fixture() {
 		free(data.debugfs_dump);
 		close(data.debugfs_fd);
-- 
2.25.1