DSB_INTERRUPT
intel_dsb_reg_write(dsb, DSB_INTERRUPT(pipe, chained_dsb->id),
intel_de_write_fw(display, DSB_INTERRUPT(pipe, dsb->id),
intel_de_write_fw(display, DSB_INTERRUPT(pipe, dsb->id),
tmp = intel_de_read_fw(display, DSB_INTERRUPT(pipe, dsb_id));
intel_de_write_fw(display, DSB_INTERRUPT(pipe, dsb_id), tmp);