GC_USER_SYS_RB_BACKEND_DISABLE  361 drivers/gpu/drm/amd/amdgpu/sid.h #define	GC_USER_SYS_RB_BACKEND_DISABLE			0x3A1
GC_USER_SYS_RB_BACKEND_DISABLE  225 drivers/gpu/drm/radeon/nid.h #define	GC_USER_SYS_RB_BACKEND_DISABLE			0x3F8C
GC_USER_SYS_RB_BACKEND_DISABLE  359 drivers/gpu/drm/radeon/sid.h #define	GC_USER_SYS_RB_BACKEND_DISABLE			0xe84