8667914253 tests/intel/kms_dsc: Add force dsc and joiner variants
000e35cfa9 tests/intel/kms_dsc_helper: Add dsc_joiner helper func()
9e43329254 tests/kms_joiner_helper: Add igt_is_joiner_supported_by_source()
71da2e73ac tests/intel/kms_joiner_helper: Add igt_get_joined_pipes_name()
407f3f709a tests/intel/kms_dsc: Store valid DSC outputs