Problem setting up CPI on OMAP4460

Babaks

Other Parts Discussed in Thread: 4460

Hello,

We have been trying to use the CPI interface on the a OMAP4460. We have been successful in sending data form CSI2 to memory. “CSI2->ipipeif->isif->Memory” (so we know the “ipipeif->isif->Memory” part works), but the “CPI->ipipeif->isif->Memory” dose not work.

Here is our setting for selecting CPI.

We set INPUT_SEL to CPI (0x3)

We set the VD_PULSE_EXT to 0.

We set the pinmux on cam2_pclk, cam2_vs, cam2_hs, cam2_wen and cam2_d0 -d5 as input.

We can confirm the cam2_vs, cam2_hs are getting pass the VP by enabling HS_VS_IRQ and looking at vs and hs (by changing SYNC_DETECT).

The clock goes to the cam2_pclk.

The cam2_wen is as input pulled up.

We still fail to receive ISIF_INT_0 from isif. The same setting works fine when we select CIS2A at VP.
What are we missing here? I appreciate your help in advance.

Thanks,

Babak

over 13 years ago

0 Ab Ba over 13 years ago

Prodigy 80 points

Hi all,

we have problems the same!! identical situation with set registers, pinmux, HS_VS_IRQ happens but no other activity in ISP at all

no IRQ from IPIPEIF, ISIF, and Memory is empty...

can any say any explanation? maybe solution or advice?

thanks!

0 Egor Rumjantsev over 13 years ago

Intellectual 825 points

Hi.

It isn't enough to get ISIF IRQs.

Did you set any settings for PG, IPIPEIF, ISIF?

If you see TRM video data goes following path: ISS->VP->PG->IPIPEIF->ISIF (for example), so you have to set ( or switch off ) all components of this subblocks!

But as you got ISS IRQs it's very good - you moving in right way.

WBR,

0 Babaks over 13 years ago in reply to Egor Rumjantsev

Prodigy 120 points

Hi Egor,

Thank you so much for the answer.

I am not using PG. In IPIPEIF the INPSRC is zero, that is all I am using there. In ISIF all the MUXs are set to zero and just pushing the data forward.

I looked at the init code you posted some time ago. What are you setting in omap4iss_cpiphy_config function? In CONTROL_CAMERA_RX, CAMERARX_CSI22_CAMMODE and CAMERARX_CSI21_CAMMODE should be 0x3 which they are. What else is there to setup?

Thanks,

Babak

0 Egor Rumjantsev over 13 years ago in reply to Babaks

Intellectual 825 points

I also didn't use PG but you have to switch off it at least :)

CONTROL_CAMERA_RX has to be switched in CPI mode...it's enough

Check IPIPEIF, ISIF settings for clocks eges and polarity

0 Ab Ba over 13 years ago in reply to Egor Rumjantsev

Prodigy 80 points

what about IPIPEIF_ENABLE.ENABLE and ISIF_SYNCEN?

do you use DWEN and ISIF_CCDCFG.EXTRG + TRGSEL couple?

can you dump your IPIPEIF&ISIF registers when Aptina works(or after initialization)?

0 Ab Ba over 13 years ago in reply to Ab Ba

Prodigy 80 points

registers memory dump is very usefull like Anshuman Saxena posts in http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/100/t/42532.aspx

0 Egor Rumjantsev over 13 years ago in reply to Ab Ba

Intellectual 825 points

Do you need image to be stored in memory ? :)

I need this, so i set this bit.

We don't use EXTRG, so i use default values of that bits

0 Ab Ba over 13 years ago in reply to Egor Rumjantsev

Prodigy 80 points

ok, thanks! but i mean the couple of regs IPIPEIF_ENABLE.ENABLE and ISIF_SYNCEN. did you set IPIPEIF_ENABLE.ENABLE? If positive, what siquence with ISIF_SYNCEN do you use?

0 Egor Rumjantsev over 13 years ago in reply to Ab Ba

Intellectual 825 points

Hi.

Sorry for delay.

If you read TRM about IPIPEIF_ENABLE.ENABLEyou will se following:

IPIPE I/F Enable RW 0
This register is used to start the operation of SDRAM
buffer memory read and generates SYNC signals.
This register is available when INPSRC1 or INPSCR2 =
1, 2 or 3

As video data come from VP you have to set MUX INPSRC1 to 0...so IPIPEIF_ENABLE.ENABLE doesn't exist in that mode

WBR,

0 achun liu over 12 years ago in reply to Egor Rumjantsev

Intellectual 550 points

Hi Egor,

I get the data from ISIF('CSI2A –> ISIF->MEM’),I also encountered some problems,this is my problem:http://e2e.ti.com/support/omap/f/849/p/265581/931924.aspx#931924,

can you help me?

BR,

0 Egor Rumjantsev over 12 years ago in reply to achun liu

Intellectual 825 points

Hi, achun liu

I haven't expirience with CSI at all as i use CPI interface.

But if i remember correctly CSI have very good advantage - you can put deserialized data to memory directly. Why do use ISIF? You need some of data preprocessing?

WBR,

0 achun liu over 12 years ago in reply to Egor Rumjantsev

Intellectual 550 points

hi,Egor,

Sorry for my late reply,I need to convert the data format used RSZ,I use VP mode,so I have to use ISIF.Now the problem has been resolved, thank you for your reply.

BR,

0 Egor Rumjantsev over 12 years ago in reply to achun liu

Intellectual 825 points

Hi.

I developed driver for CPI one and half year ago. In that time (in fact nothing changed till now) CPI words was closed topic for TI. So i haven't any assistance...only words that this interface doesn't support by TI.

So i wanted to get any data from this intrface, whithout any preprocessing and i don't use any other subblocks of ISP. May be when i will need this i try to use other blocks of ISP. I can get gata in RGB and YUV formats....and it's enough for me till now.

WBR,

0 Guohui Li1 over 11 years ago in reply to Egor Rumjantsev

Prodigy 170 points

Hi, Egor,

have your implemented the driver for CPI on omap4460 and capture the video data successfully? i plan to connect a sensor with CPI interface to omap4460, so i am wondering whether cpi of 4460 can work or not. thanks very much.

0 Babaks over 11 years ago in reply to Guohui Li1

Prodigy 120 points

Hi Guohui,

Yes, The CPI works fine with both video and single frame.

Babak

0 Egor Rumjantsev over 11 years ago in reply to Babaks

Intellectual 825 points

At last :) Yes, CPI and H3A modules is working without any Ducati code change. I think that it is time for TI to public CPI support officially. It is quite old processor, why do they keep it in secret?

0 Egor Rumjantsev over 11 years ago in reply to Guohui Li1

Intellectual 825 points

Hi, we did this driver in April of 2012 using only TRM. So there are a lot of information on this forum - I tried to help other developers. So I hope now it won't be big problem. Good luck.

0 Marc B. over 11 years ago in reply to Egor Rumjantsev

Prodigy 100 points

Hi guys,

I am also not able to get ISIF_VDINT interrupts. According to the TRM, no assumption is made on the pixel format when using CPI (section 8.2.2.3.1). I am currently looking into the ISIF input formatter. I am thinking that the ISIF probably needs to know how a video line is formatted...

Any thoughts ?

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Problem setting up CPI on OMAP4460