AnsweredAssumed Answered

ADV7612 incorrect FIELD0_TOTAL_HEIGHT content

Question asked by llmike on Mar 4, 2015
Latest reply on Mar 5, 2015 by mattp

Hi,

 

I've encountered very strange ADV7612 behavior. I'm using Renesas Koelsch evaluation board with onboard ADV7612. As for HDMI source I use Blackberry Z10 phone with 640x480p@60Hz [4:3] video mode. When I connect phone to monitor directly I can see correct 640x480 picture, when I connect it to ADV7612 I can see only half of frame in vertical direction.

 

When I scan ADV7612 registers they show following content:

 

line_width

640

hsync front porch

16

hsync pulse width

96

hsync back porch

48

total line width

800

field0_height

480

field0 VS front porch

20

field0 VS pulse width

4

field0 VS back porch

66

field0 total height

1050

 

Measured TMDS clock is 25203kHz. HDMI_INTERLACED is set to 0 on read. All locks are present. It seems that ADV7612 detects this video mode as interlaced and tried to handle it as interlaced. I played a lot with ADV7612 registers, but I'm unable to get rid of this issue.

 

Thanks in advance!

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