tests: Add variable refresh rate tests

There are 3 tests for basic variable refresh rate functionality.

The tests measure flipping at the average between the current mode
refresh rate and the minimum supported variable refresh rate.

It tests that VRR is enabled and that the difference between flip
timestamps converges to the requested rate. It also tests this under
both S3 and DPMS.

Potential ideas for future tests:
- Test behavior inside VRR range with a stepping test
- Test behavior outside of VRR range
- Multi-monitor (limited by no async pageflips in DRM atomic API)

Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 4a7c3c97..679d4e84 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -104,6 +104,7 @@ enum igt_atomic_crtc_properties {
        IGT_CRTC_MODE_ID,
        IGT_CRTC_ACTIVE,
        IGT_CRTC_OUT_FENCE_PTR,
+       IGT_CRTC_VRR_ENABLED,
        IGT_NUM_CRTC_PROPS
 };
 
@@ -121,6 +122,7 @@ enum igt_atomic_connector_properties {
        IGT_CONNECTOR_DPMS,
        IGT_CONNECTOR_BROADCAST_RGB,
        IGT_CONNECTOR_CONTENT_PROTECTION,
+       IGT_CONNECTOR_VRR_CAPABLE,
        IGT_NUM_CONNECTOR_PROPS
 };