CXADEC_CHIP_CTRL
state->rev = cx18_av_read4(cx, CXADEC_CHIP_CTRL) & 0xffff;
cx18_av_and_or4(cx, CXADEC_CHIP_CTRL, 0xFFFBFFFF, 0x00120000);
cx18_av_write4_expect(cx, CXADEC_CHIP_CTRL, 0x00010000,