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ADV7611 RGB Full range when no Infoframe

Question asked by VianneyZ on Nov 29, 2016
Latest reply on Dec 6, 2016 by VianneyZ

Hi,

 

I'm trying to configure my ADV7611 to Auto color space but it seems that the correct RGB range is not correctly applied.

I have a source (computer) outputing RGB full range (0 to 255) and the ADV configures it's input to RGB limited range (16 to 235).

 

Here are some registers configurations:

0x98, 0x00, 0x02  -- Default value

0x98, 0x01, 0x06  -- HDMI-GR

0x98, 0x02, 0xF2  -- INP_COLOR_SPACE = 0b1111 (Input color space depends of HDMI block) and RGB_OUT = 1

0x98, 0x03, 0x40  -- 24 bits RGB SDR mode input

 

When I read 0x98, 0x60 (infoframe raw information), the ADV outputs 0x00

 

With the above configuration, I can see on my monitor that the colors look like saturated. If I write:

0x98, 0x02, 0x12  --INP_COLOR_SPACE = 0b0001 (Input color space forced to RGB full range)

My picture is becoming correct.

 

 

I looked at the reference manual and found register 0x47 in HDMI map.

I configured the following in order to have the configuration described in Figure 32:

 

0x68, 0x47, 0x06  -- QZERO_ITC_DIS = 1 and QZERO_RGB_FULL = 1

 

But the ADV still stays in RGB Limited mode input...

 

For the moment, I found a "manual" solution, if register 0x53 in HDMI map equals 0x00 and 0x60 in IO map equals 0x00, I manually set the INP_COLOR_SPACE to 0b0001 in 0x02. It works but it sounds like a workaround...

 

Any clues on this problem?

 

Thanks

 

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