[Intel-gfx] [igt] igt/kms_psr_sink_crc: Add psr_drrs subtest

[Radhakrishna Sripada]

Platforms do not support psr and drrs simultaneously.
Adding a subtest to make the check.

Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada at intel.com>
---
 tests/kms_psr_sink_crc.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tests/kms_psr_sink_crc.c b/tests/kms_psr_sink_crc.c
index bd3fa5e94d85..1c25f2c81a34 100644
--- a/tests/kms_psr_sink_crc.c
+++ b/tests/kms_psr_sink_crc.c
@@ -284,6 +284,15 @@ static void assert_or_manual(bool condition, const char *expected)
 	igt_assert(igt_interactive_debug || condition);
 }
 
+static bool drrs_disabled(data_t *data)
+{
+	char buf[512];
+
+	igt_debugfs_read(data->drm_fd, "i915_drrs_status", buf);
+
+	return strstr(buf, "DRRS Support: No\n");
+}
+
 static void run_test(data_t *data)
 {
 	uint32_t handle = data->fb_white.gem_handle;
@@ -524,6 +533,11 @@ int main(int argc, char *argv[])
 		igt_assert(wait_psr_entry(&data));
 	}
 
+	igt_subtest("psr_drrs") {
+		setup_test_plane(&data);
+		igt_assert(drrs_disabled(&data));
+	}
+
 	for (op = PAGE_FLIP; op <= RENDER; op++) {
 		igt_subtest_f("primary_%s", op_str(op)) {
 			data.test_plane = DRM_PLANE_TYPE_PRIMARY;
-- 
2.9.3