ucHPDId          8446 drivers/gpu/drm/amd/include/atombios.h   UCHAR  ucHPDId;             // Input parameter, used when ucAction = DP_SERVICE_V2_ACTION_DET_EXT_CONNECTION
ucHPDId          7191 drivers/gpu/drm/radeon/atombios.h   UCHAR  ucHPDId;             // Input parameter, used when ucAction = DP_SERVICE_V2_ACTION_DET_EXT_CONNECTION