AIU_HDMI_CLK_DATA_CTRL[1:0] AIU_HDMI_CLK_DATA_CTRL[5:4] AIU_CLK_CTRL_MORE[6] I2S SPDIF
(CTRL_CLK_SEL) (CTRL_DATA_SEL) (AMCLK) (I2S) (SPDIF)
0x0 0x0 0x0 silence silence
0x0 0x0 0x1 silence silence
0x2 0x0 0x0 silence playback
0x2 0x0 0x1 silence silence
0x2 0x2 0x1 playback silence
0x2 0x2 0x0 silence playback