cbus_writebm
cbus_writebm(ctx, 0x31, 0x0C, 0x0C);
cbus_writebm(ctx, 0x3C, 0x30, 0x38);
cbus_writebm(ctx, 0x22, 0x0D, 0x0F);
cbus_writebm(ctx, 0x2E, 0x15, 0x15);
cbus_writebm(ctx, CBUS_LINK_CONTROL_2_REG, ~0, MHL_INIT_TIMEOUT);
cbus_writebm(ctx, 0x44, ~0, 1 << 1);