OPT_COMB_SUBTRACT 4161 drivers/gpu/drm/amd/include/asic_reg/gca/gfx_8_1_enum.h 	OPT_COMB_SUBTRACT                                = 0x2,
OPT_COMB_SUBTRACT 16261 drivers/gpu/drm/amd/include/navi10_enum.h OPT_COMB_SUBTRACT                        = 0x00000002,
OPT_COMB_SUBTRACT 19483 drivers/gpu/drm/amd/include/vega10_enum.h OPT_COMB_SUBTRACT                        = 0x00000002,