We used ADV7282-M on our project, but found a issue.
On 480P output mode, we always see a black vertical line at left side, please see below photo, is it normal?
May that vertical line shift from right side (black bar)?
The expert was going to check if some controls could move the image within the MIPI image but he said that the backend processor that received the MIPI signal is normally where things like that were adjusted.
Looks like HSYNC is off by one pixel in what you are capturing. That isn't something particularly unusual and the root cause could be in multiple places in the system. That's why there are HS Position Control registers which lets you shift the edge a few pixels in either direction to compensate.
This picture is I got from ADI engineer Zone ADV7282-M design support files -> ADV728x MIPI free run.zip
In ADV728x MIPI free run.zip had 480i / 480P / 576i / 576P four folders.
About progressive 480P and 576P had this problem and same as our system problem.
May I know why in your system also had this problem. Thanks for help~~
It's analog inputs-- so being off by a pixel or two on the sync edges versus the data at the source or at the capture point due to non-standard settings is really common. This is general advice, not specific to ADV728X. That's why the HSYNC adjust registers are there-- to correct for this.
I would just use those to move the edge a pixel.
Here is another screen capture of FREE Run pattern output by ADV728x progressive mode, it has the same problem. As I know Free Run pattern is a build-in pattern in ADV728x, it is not external analog input source. Do you know how to adjust the CSI output H-position?
You can adjust it in the capture devices as well since that would seem to be the issue. I think the same controls work for CSI but I'll ask an expert to comment.
You mention about that the expert was going to check this issue:
"The expert was going to check if some controls could move the image within the MIPI image but he said that the backend processor that received the MIPI signal is normally where things like that were adjusted."
And our customer still waiting for the feedback, their want to get a clear result; so can you help to speed up the progressive?
Sorry for that.
Thank you for your help.
There aren't any controls for moving within the MIPI as he suspected. It'll need to be adjusted at the backend processor.
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