Hi, The 'is_frl' struct field is conditional: #if defined(CONFIG_DRM_AMD_DC_DCN) bool is_frl; /* indicate if DSC is applied based on HDMI FRL sink's capability */ #endif so code that uses it should be careful, otherwise build errors may happen: ../drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_validation.c: In function 'dp_active_dongle_validate_timing': ../drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_validation.c:126:66: error: 'const struct dc_dsc_config' has no member named 'is_frl' 126 | if (timing->flags.DSC && !timing->dsc_cfg.is_frl) | Seen on arch=um and arch=riscv (RV64). -- ~Randy