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Altera_Forum
Honored Contributor I
2,634 Views

Designing a MIPI D-PHY CSI2 interface

Hello, 

 

I am working on a design that needs to send pixel data via a 

camera link from a FPGA to a TI OMAP Camera ISP interface. 

The target FPGA is a Cyclone IV GX device. 

 

The Camera ISP on the TI OMAP is a MIPI D-PHY CSI2 and CSI1/CCP2 

compatible interface. My questions are as follow: 

 

1. Has anyone on the forum done similar design using an MIPI IP they 

bought from a IP vendor?  

 

2. If there is someone out there that done this before, which IP 

vendor would you recommend? 

 

3. What are your experiences design this interface and would you 

recommend to design this interface without using a MIPI IP core? 

(i.e. design this yourself) How many months of development time? 

 

4. What Altera device were you using and what was the resource 

utilization for the IP core and the surrounding logic? 

 

5. What was the speed and data lanes, throughput etc achieved via 

this interface? 

 

Thanks,
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10 Replies
Altera_Forum
Honored Contributor I
383 Views

The MIPI spec is only available to MIPI Alliance members and a seat will set you back $10,000.- per year. So I don't think you will find many takers here.  

Also the MIPI Alliance is geared to big organisations (> 250M$/yr) and that kind of people don't spill their 'secrets' (on an 'open' forum like this one).  

So I guess you are pretty much on your own. 

Any particular reason to use a MIPI interface?
Altera_Forum
Honored Contributor I
383 Views

Actually my FPGA has to interface to the TI OMAP Camera ISP interface. 

The two serial ports on the the ISP can be configured either as MIPI CSI2 

at 1 Gbps/lane or CSI1/CCP2 (legacy). I would think that there are a lot 

of users sending the data over this interface and would need to design 

a MIPI CSI2 compatible interface. 

 

I have researched into some IP vendors already but have considered 

designing the interface myself. However, we are on a very tight schedule. 

Thus, acquiring IP core is an option. 

 

I did not know about the $10,000 membership fee to join the MIPI alliance. 

No wonder I cannot find the MIPI spec on line. 

 

Thanks,
Altera_Forum
Honored Contributor I
383 Views

I had to look deep to find the 'cost of membership'. 

Actually smaller companies can get a 50% to 75% rebate. :) You may find the $ 2,500,- a bit more feasible? 

I don't expect much magic in that MIPI spec. The closest information I could find was on Northwest Logic's web-site : http://www.nwlogic.com/products/mipi_solution.html (http://www.nwlogic.com/products/mipi_solution.html). You can download a product brief showing what you need: the tx module. 

Which OMAP CPU do you have in mind?
Altera_Forum
Honored Contributor I
383 Views

Yes. I am already in contact with them but thanks for bring it up. 

We are using TI DM3730.
Altera_Forum
Honored Contributor I
383 Views

 

--- Quote Start ---  

We are using TI DM3730. 

--- Quote End ---  

 

 

Now I did a (brief but thorough, I think) check and I only found a parallel camera interface in the DM3730 datasheet. The TRM for the DM37x documents the MIPI serial interfaces, but it states that this is not available on all devices in the DM37x family, see page 195 of the TRM. 

Being curious again, what camera / image sensor are you thinking of?
Altera_Forum
Honored Contributor I
383 Views

 

--- Quote Start ---  

Hello, 

 

I am working on a design that needs to send pixel data via a 

camera link from a FPGA to a TI OMAP Camera ISP interface. 

The target FPGA is a Cyclone IV GX device. 

 

The Camera ISP on the TI OMAP is a MIPI D-PHY CSI2 and CSI1/CCP2 

compatible interface.  

--- Quote End ---  

 

 

Hi, Peter. 

 

Maybe these files will helpful to your project.
Altera_Forum
Honored Contributor I
383 Views

Hi Peter,  

 

How's your progress with the CSI2 interface ?  

I'm thinking of doing a similar design of sending video data from a camera through a Cyclone IV E to the CSI2 interface of a OMAP DM3730.  

Any advice you can provide ?  

 

Thanks. 

Hui Peng
Altera_Forum
Honored Contributor I
383 Views

 

--- Quote Start ---  

Hi Peter,  

 

How's your progress with the CSI2 interface ?  

I'm thinking of doing a similar design of sending video data from a camera through a Cyclone IV E to the CSI2 interface of a OMAP DM3730.  

Any advice you can provide ?  

 

Thanks. 

Hui Peng 

--- Quote End ---  

 

 

Yes, I am interested in pursuing a similar project using  

MIPI to an OMAP 44xx but the seats are $10K (US) and  

the TI evaluation boards are overpriced to begin with.  

Is there ANY information out there that is not a rip-off  

like USB was eight years ago?  

Why do we engineers put up with this cycle of proprietary  

bullS*** and waste time with finding something that  

is a duplication of prior efforts?  

The OMAP 5 has MIPI and USB3.0 but I might as well  

use an Intel processor for what TI is asking, especially  

by the time I mess with the driver and integration bullS*** 

Anyway, ANY help would be greatly appreciated.  

I love the ease of use of Altera products, the customer  

is making me take the integration with OMAP route, grrrr. 

TIA
Altera_Forum
Honored Contributor I
383 Views

Hi, 

 

I think for interfacing the OMAP Video input using MINI CSI2 the chip SN65LVDS315 might be useful.
Altera_Forum
Honored Contributor I
383 Views

Also check out the MIPI bridge devices below: 

http://www.upsidesales.com/#!mipi-bridge-chips/c2hy
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