[PATCH i-g-t v1] tests/kms_async_flips: Add psr async flip subtest

[Santhosh Reddy Guddati]

Add a new subtest to verify async flips does not cause PSR exit.
Enable PSR and execute async flips to verify system remains in
PSR mode after async flips.

Signed-off-by: Santhosh Reddy Guddati <santhosh.reddy.guddati at intel.com>
---
 tests/kms_async_flips.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/tests/kms_async_flips.c b/tests/kms_async_flips.c
index da426f753..cf6b63b3e 100644
--- a/tests/kms_async_flips.c
+++ b/tests/kms_async_flips.c
@@ -85,6 +85,9 @@
  *
  * SUBTEST: async-flip-suspend-resume
  * Description: Verify the async flip functionality with suspend and resume cycle
+ *
+ * SUBTEST: psr-async-flip
+ * Description: Verify that async flips do not cause PSR exit
  */
 
 #define CURSOR_POS 128
@@ -102,6 +105,7 @@ IGT_TEST_DESCRIPTION("Test asynchronous page flips.");
 
 typedef struct {
 	int drm_fd;
+	int debugfs_fd;
 	uint32_t crtc_id;
 	uint32_t refresh_rate;
 	struct igt_fb bufs[NUM_FBS];
@@ -740,6 +744,33 @@ static void run_test_with_modifiers(data_t *data, void (*test)(data_t *))
 	}
 }
 
+static bool psr_wait_entry_if_enabled(data_t *data)
+{
+	igt_skip_on_f(!is_psr_enable_possible(data->drm_fd, PSR_MODE_1),
+		      "enable_psr modparam doesn't allow PSR mode 1\n");
+
+	return psr_wait_entry(data->debugfs_fd, PSR_MODE_1, data->output);
+}
+
+static void test_psr_async_flip(data_t *data)
+{
+	if (!psr_sink_support(data->drm_fd, data->debugfs_fd, PSR_MODE_1, data->output))
+		igt_skip("PSR mode 1 is not supported on this output\n");
+
+	psr_enable(data->drm_fd, data->debugfs_fd, PSR_MODE_1, NULL);
+	igt_display_commit(&data->display);
+
+	/* Confirm PSR entry before starting async flips */
+	igt_assert_f(psr_wait_entry_if_enabled(data),
+			 "PSR is not enabled before async flip test\n");
+
+	test_async_flip(data);
+
+	/* Confirm PSR is still active after async flips */
+	igt_assert_f(psr_wait_entry_if_enabled(data),
+			 "PSR is not enabled after async flip test\n");
+}
+
 static data_t data;
 
 igt_main
@@ -748,6 +779,7 @@ igt_main
 
 	igt_fixture {
 		data.drm_fd = drm_open_driver_master(DRIVER_ANY);
+		data.debugfs_fd = igt_debugfs_dir(data.drm_fd);
 		kmstest_set_vt_graphics_mode();
 		igt_display_require(&data.display, data.drm_fd);
 		igt_display_require_output(&data.display);
@@ -896,6 +928,12 @@ igt_main
 		run_test(&data, test_async_flip);
 	}
 
+	igt_describe("Verify that async flips do not cause PSR exit");
+	igt_subtest_with_dynamic("psr-async-flip") {
+		data.atomic_path = false;
+		run_test(&data, test_psr_async_flip);
+	}
+
 	igt_fixture {
 		for (i = 0; i < NUM_FBS; i++)
 			igt_remove_fb(data.drm_fd, &data.bufs[i]);
-- 
2.34.1