BACKEND_DISABLE  1333 drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c 	data = REG_GET_FIELD(data, GC_USER_RB_BACKEND_DISABLE, BACKEND_DISABLE);
BACKEND_DISABLE  3484 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c 	data = REG_GET_FIELD(data, GC_USER_RB_BACKEND_DISABLE, BACKEND_DISABLE);