We currently test configurations by testing compatibility between planes and CRTCs, and encoders and CRTCs. However, encoder-CRTC restrictions are deprecated, and the recommended way to test a configuration now is to use DRM_MODE_ATOMIC_TEST_ONLY (also here, atomic_check here, here).
We could rewrite the whole configuration system to use DRM_MODE_ATOMIC_TEST_ONLY, including for DRMPlanes. Do we want to use the current compatibility tests as well? Or only for planes?
We currently test configurations by testing compatibility between planes and CRTCs, and encoders and CRTCs. However, encoder-CRTC restrictions are deprecated, and the recommended way to test a configuration now is to use
DRM_MODE_ATOMIC_TEST_ONLY(also here,atomic_checkhere, here).We could rewrite the whole configuration system to use
DRM_MODE_ATOMIC_TEST_ONLY, including forDRMPlanes. Do we want to use the current compatibility tests as well? Or only for planes?