I2S_TX_PATH
ucontrol->value.enumerated.item[0] = i2s->stereo_to_mono[I2S_TX_PATH];
if (value == i2s->stereo_to_mono[I2S_TX_PATH])
i2s->stereo_to_mono[I2S_TX_PATH] = value;
ucontrol->value.enumerated.item[0] = i2s->mono_to_stereo[I2S_TX_PATH];
if (value == i2s->mono_to_stereo[I2S_TX_PATH])
i2s->mono_to_stereo[I2S_TX_PATH] = value;
path = I2S_TX_PATH;