PROCESSOR-SDK-TDAX: CSI-2 Receiver interface with 8MP camera (Ar0820)

Vivek Malhotra65

Part Number: PROCESSOR-SDK-TDAX
Other Parts Discussed in Thread: DS90UB960-Q1

Hi,

I have questions regarding 8MP sensor support on TDA4x.

As I read in the TRM, the TDA4x is compliant to MIPI D-PHY standard v1.2 and the Camera Streaming Interface Receiver (CSI_RX_IF) is MIPI CSI-2 v2.0.

I beleive it should be capable to recieive the data from one 8MP camera @ 22 frames per seconds without any issues.

However, In the TRM it is mentioned on page-35, Camera Streaming Interface Receiver (CSI_RX_IF)

- Supports one 4MP camera or eight 2MP camera streams

- Two VP 32-bit streams to VISS inputs of VPAC image processing accelerator

I need some clarification here,

1. What is the frame rate for 4MP camera refered to in TRM ?

2. Does it mean that a single stream from 8MP camera will not be supported ?

2. Due to which limitation only one 4MP camera stream is supported ? Is this limitation only due to the FPD link-III DS90UB960-Q1 Deserielizer on the fusion board ?

3. Is there limitations with the VPAC (VISS) module which is limiting the input to 4MP @ ___ framerate ?

Best regards,

Vivek

over 5 years ago

0 Alex Bashkov over 5 years ago

TI__Genius 13550 points

Hello Vivek,

I am pretty sure this is wrongly worded. It most likely should say:

TRM said:
Supports *at least (but not limited to)* one 4MP camera or eight 2MP camera streams

Or otherwise said, the statement is to provide the minimum use case support requirements. Let me double-check with the design team and we can rework this verbiage in the TRM to avoid confusion.

thanks,

Alex

0 Vivek Malhotra65 over 5 years ago in reply to Alex Bashkov

Prodigy 130 points

Thanks Alex,

I shall wait for your feedback after you have double checked please.

Best regards

Vivek

0 Alex Bashkov over 5 years ago in reply to Vivek Malhotra65

TI__Genius 13550 points

Just FYI Vivek Malhotra65, it's a Thanksgiving week so the camera designers are out of office, so please expect delays. For the time being, please assume CSI receiver can achieve higher than that throughput.

thanks,

Alex

0 Alex Bashkov over 5 years ago in reply to Alex Bashkov

TI__Genius 13550 points

To follow up on the status of this since it's been a few days, we are still looking for the correct and fully verified supported throughput. Will let you know here soon as we know the answer.

thanks

Alex

0 Vivek Malhotra65 over 5 years ago in reply to Alex Bashkov

Prodigy 130 points

Thanks Alex,

In addition to it, I have a related question of interfacing ar0820 8MP sensor @22Hz with the present fusion board we use here

ASSY 518520 Rev C

PWB 518521 Rev C

Logic 518522 Rev C

Adas sensor fusion rev 3

I see that this board has DS90UB960-Q1 Quad deserializer
This deserializer supports 2-Megapixel Sensors With Full HD1080p Resolution at 60-Hz, I would say that scales to 4MP @30-Hz
How can we connect a 8MP AR0820 Sensor @22Hz to one this deserializer ? the bandwidth is limited I guess
Is there any newer revisions of fusion boards with GMSL or may be fpd Link xxx available that can handle high bandwidth ?

Regards

Vivek

0 Mayank Mangla over 5 years ago in reply to Vivek Malhotra65

TI__Mastermind 24525 points

We have support for AR0820 in Processor SDK RTOS Automotive.

The cameras we use have AR0820 + UB953 serializer. Fusion board used is Rev C, which has UB960. We have been able to achieve 24fps at full resolution.

In future we will have TI FPDLink IV SerDes (UB97x) which will have higher bandwidth.

0 Alex Bashkov over 5 years ago in reply to Mayank Mangla

TI__Genius 13550 points

Hello,

In addition and to follow up on your original question (we've got some feedback from internal testing teams) - on J7 a single CSI_RX can support 4x4MP streams @30fps (has been tested and confirmed). It can support up to a 1x16MP stream with a reasonable frame rate. For your use case (8MP @22fps) should not have any restriction whatsoever.

Hope this helps,

thanks,

Alex

0 Vivek Malhotra65 over 5 years ago in reply to Alex Bashkov

Prodigy 130 points

Thank you Alex !

0 Vivek Malhotra65 over 5 years ago in reply to Mayank Mangla

Prodigy 130 points

Thank you Mayank !

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PROCESSOR-SDK-TDAX: CSI-2 Receiver interface with 8MP camera (Ar0820)