ATOM_DP_SS_ID1   4144 drivers/gpu/drm/amd/include/atombios.h #define ATOM_DP_SS_ID1                                     0x0f1         // SS ID for internal DP stream at 2.7Ghz. if ATOM_DP_SS_ID2 does not exist in SS_InfoTable, it is used for internal DP stream at 1.62Ghz as well.
ATOM_DP_SS_ID1   3652 drivers/gpu/drm/radeon/atombios.h #define ATOM_DP_SS_ID1												 0x0f1			// SS ID for internal DP stream at 2.7Ghz. if ATOM_DP_SS_ID2 does not exist in SS_InfoTable, it is used for internal DP stream at 1.62Ghz as well.