help about MIPI CSI-2 in DM816x

Hi,

AFAIK, DM8168 does not support CSI2 interface.

Rgds,

Brijesh

Yes,but is possible with chip as SN65DSI84ZQER converter signal from CSI2 interface and connected to DM816x?Do know in texas chip with this function?

Thanks!

Best Regards!

You would need to convert to parallel CMOS levels.

What is your source? If it is able to generate H & V syncs in addition to the pixel data then a simple de-serializer might work. There are also CPLDs available which have various LVDS IOs which might be able to be used to de-serialize and generate appropriate H & V.

Depending on the color format of the video stream it might be necessary to process/decode the image in software though (or in the CPLD if used).

The key is going to be what is the format of the source video?

BR,

Steve

You might also look at the LVDS324.

Again, the video source data format will be critical.

BR,

Steve

LVDS324

Dear Steve thanks for help me,

the source video is this :

216 Mbps output data rate with signal

Positive and negative MIPI Differential Clock Output(CLKP,CLKN)

Positive and negative MIPI Differential Data Output(D0P,D0N)

my source video is serial line in 4 wires 2 for clock 2 for data,Conforms with MIPI CSI-2 Specification.

Can i convert this format for connection to DM816x input video capture?

Thanks!

Best Regards!

Source video is in format digital not analog,i need to convert this signal from serial source mipi CSI-2 to parallel for do connection to DM816x input video capture,but i don't find the right connection in schematics.

Thanks!

Good week end at all!

Possibly. You still need to know the format of the actual data stream. Is it YUV, RGB, raw sensor Bayer image data? Does the source generate H & V syncs?

There are 2 parts to the problem.

First, getting the data in to the processor.

Second, processing the data to the format you really want.

If the video source generates a stable stream which contains H & V syncs (data enable would also help) then getting the data in to the processor should be simple.

Depending on the format output by your source you may additionally need to convert the data stream into the format you ultimately need. Again this depends very much on the format of your source. If it is 8 bit YUV422 and you need RGB then you might be able to use the HDVPSS color space converters. If the source is 12 bit raw Bayer then you will need to do more work in software.

The first thing I suggest is to fully comprehend exactly what data formats, bit depths, syncs etc... are presented by your source, then determine if the LVDS324 works for you or not (or, would you need a CPLD?). Then determine if the format presented to the HDVPSS is what you want in your capture buffer. If not, then can the HDVPSS do the conversion for you or will you need to do this in software after capture.

There are many questions that you need to analyze, that I cannot answer since I don't have enough information about your source and of your ultimate requirements.

BR,

Steve

Ok,my data stream in input to DM816x is this:

data stream outputs is an ITU-R BT.656 data stream. The ITU-R BT.656 data stream is
connected into a CSI-2 Tx module. Data from the CSI-2 Tx module is fed into a D-PHY physical layer and output serially from the device. The output consists of a single data channel on the D0P and D0N lanes and a clock
channel on the CLKP and CLKN lanes.

I think to connection this data stream to DM816x and convert in another format,as mpeg.

i found this in datasheet :

The data stream output video data in an 8-bit
YCrCb 4:2:2 format. The video data is output in an interlaced
format at a nominal data rate of 216 Mbps.

ITU656 format is the key to the data format.

If the source sends ITU656 then you will be able to directly connect the de-serialized data to the HDVPSS VIP port and the DM816x will be able to do any desired format conversion. Drivers should also require very minimal changes to configure the de-serializer instead of a video decoder which is normally connected to the port.

I suggest posting a question to the high speed serial forums (interface if I remember correctly) asking if the LVDS324 is appropriate to de-serialize I know some of the DM385 IPNetCam sensor modules use the LVDS324 but I don't know if they are CSI-2 modules or not.

You might also look at the Lattice solution for this problem...

http://www.latticesemi.com/Products/DesignSoftwareAndIP/IntellectualProperty/ReferenceDesigns/ReferenceDesign03/CSI2toParallel.aspx

BR,

Steve

Dear Steve thanks again for help me.

Yes i think this data stream can i to connect to DM816x,with deserealizer chip.I find chip toshiba for do function bridge CSI-2 parallel.

I post my problem in interface forum.

Thanks!

Best Regards!

good week end!

Vale