broken data when adv7481 take DV 1080P as input

Hi,
 In your configuration,output video seems like 4:2:0 format. But we don't see any 4:2:0 conversion in ADV7481 part.Please refer  ez.analog.com/.../adv7481-design-support-files

 Note: The video data output by the HDMI/MHL section is always in a 4:4:4 format with 36 bits per pixel.This is irrespective of the encoding format of the video data encapsulated in the HDMI/MHL/DVI stream input to the HDMI/MHL Rx section (that is, 4:2:2 or 4:4:4).

Thanks,

Poornima

hi Poornima,

Thanks for your reply. the screenshot is the HDMI section + ISP process. so that you saw it's 4:2:0.

actually we configured as the guide said, and tested with this SONY DV, 720P is okay, and the the preview on screen is good. but 1080P is broken as above.

I am not sure if there is some config or setting could adjust to make it work well, could you share some guide or clue?

thanks a lot.

Hi,

 Please refer below script for 1080 configuration,whether you may miss anything for 1080p.

 https://ez.analog.com/video/f/q-a/5254/ask-for-adv7481-hdmi-yuv422-576p-script

Thanks,

Poornima

Thanks Poornima, I will have a try to check the different between current setting the reference.

hi Poornima,

Our board is designed with 2-lane - YUV422 8-Bit. the input size is HDMI in with 1080P.

I checked the ADV7481 Required Settings, there is no matched setting for our case in https://www.analog.com/media/en/engineering-tools/design-tools/ADV7481ES3C-VER.3.6c.txt .

and I tested with below setting:

; Supported Formats For Script Below - 720x480p60, 1280x720p60, 1920x1080i60, 720x576p50, 1280x720p50, 1920x1080i50, 800x600(SVGA)@60, 640x480(VGA)@60, 800x480(WVGA)@60, 1024x768(XGA)@60
:01-11 HDMI to MIPI TxA CSI 2-Lane - YUV422 8-Bit, Up to 600Mbps:

but still got the same issue.

and I'd like to show the point of my issue, the 720P is okay, but 1080P has different result with several devices, some one shows OK, some shows with lots of green lines, somes shows the broken data.

could you help to check this?

thanks a lot.

Hi,

 Have you tried with some other source ?

 For different input format ,have you configure the VID_STD register?

Note: And also as per resolution and formats support on CSI-TXA in 2 lane output Mode,
it will support only 1080i@60HZ , but 1080p@60Hz will not allowed by MIPI protocol.

So 1080p will support vertical freq(frame rate) till @30Hz. Please refer Page208 in ADV748x Hardware manual.

Thanks,

Poornima

Hi,

 Have you tried with some other source ?

 For different input format ,have you configure the VID_STD register?

Note: And also as per resolution and formats support on CSI-TXA in 2 lane output Mode,
it will support only 1080i@60HZ , but 1080p@60Hz will not allowed by MIPI protocol.

So 1080p will support vertical freq(frame rate) till @30Hz. Please refer Page208 in ADV748x Hardware manual.

Thanks,

Poornima

hi,

There is no other source(DV/JVC) could support 1080P HDMI in, so I cannot test it.

we configured VID_STD register with 0x4A, it's 720x480p60 by default.

I checked the Hardware manual, it looks like ADV7481 cannot support 1080P@60fps.

if the input is 1080P@60fps, is there any possible that ADV7481 receive or handle interval frame to make the input as 1080P@30fps? such as handle 1 frame, then drop 1 frame, then handle 1 frame, drop 1 frame, ....

Hi,

But CSI-TXA 4-Lane Output Mode can support 1080p@60fps, Refer Page209 in ADV748x Hardware manual.

Both the 1-lane MIPI CSI-2 Tx and the 4-lane MIPI CSI-2 Tx are disabled by default. To enable either of the MIPI CSI-2 Txs, the appropriate control must be enabled, either csi1_en or csi4_en.

Thanks,

Poornima

Thanks for your suggestion, but the board design is done very early, so only 2 lanes could be configuered, is there any way to make it work with 2 lanes by reducing the ADV7481 process received data, such as receive or handle interval frame to make the input as 1080P@30fps? for example, handle 1 frame, then drop 1 frame, then handle 1 frame, drop 1 frame, ....

Hi,

This progressive format is not possible in 2-lane. But we can support for interlaced one.

Thanks,

Poornima

okay, thanks very much for your verification.