Hdmi Dvi Selection - Analog Devices ADV7850 Hardware Manual

Function
system_pd
0
1 
hpd_state, Addr B8 (Main), Address 0x42[6] (Read Only)
This readback displays the state of the hot plug detection.
Function
hpd_state
0 
1
rx_sense, Addr B8 (Main), Address 0xC6[2] (Read Only)
This readback indicates whether or not the receiver detected a TMDS pullup on the clock signal line.
Function
rx_sense
0 
1
tx_hpd_override, IO, Address 0x2C[0]
This control is used to allow the HDMI Tx to power on when HPD is low.
Function
tx_hpd_override
0 
1

13.3 HDMI DVI SELECTION

The HDMI Tx core supports the transmission of both HDMI and DVI streams. The type of stream the ADV7850 transmits is set via
hdmi_mode_sel. In DVI transmission mode, no packets will be sent and all registers relating to packets and InfoFrames will be
disregarded. The current transmission mode can be confirmed by reading hdmi_mode.
hdmi_mode_sel, Addr B8 (Main), Address 0xAF[2]
This control is used to set the HDMI mode. In automatic mode, audio detection will put the Tx into HDMI mode.
Function
hdmi_mode_sel
0
1 
hdmi_mode, Addr 72 (Main), Address 0xC6[4] (Read Only)
HDMI mode status.
Rev. A May 2012
Description
Normal operation
Power down ADV7850 Tx
Description
Low hot plug detect state
High hot plug detect state
Description
TMDS clock pullup not present
TMDS clock pullup present
Description
Normal operation
HPD override
Description
Set automatic mode
Set DVI/HDMI mode
350
ADV7850