topic Re: Frames and Resolution Handled by iMX, IPU in i.MX Processors

Frames and Resolution Handled by iMX, IPU

titusstalin — Wed, 14 Dec 2016 06:29:50 GMT

Dear all,

I've customized MIPI camera which stream the frames in any resolution say 12x12, 800x600, 640x480, 1200x1200 etc.,

As I'm using customized camera and data format is "User defined" data type, I took ov5640 MIPI camera as reference and modified the driver and enabled IPU_PIX_FMT_GENERIC format.

I'm able to get the frame 1200x1200 data perfectly, but I'm not able to get the data 1204x1204 resolution.

Can we get like that ?

Thanks for your support.

Regards,

Titus S.

Re: Frames and Resolution Handled by iMX, IPU

igorpadykov — Wed, 14 Dec 2016 08:50:18 GMT

Hi Titus

there are some size restricitons as for example IPU IC require the input/output width

must be multiple of 8, as mentioned on
https://community.nxp.com/message/272190
https://community.nxp.com/message/856805?commentID=856805#comment-856805

Also some channel parameters described in sect.37.4.2.10.1 CPMEM i.MX6DQ RM
imply to be multiple of 8.

Best regards
igor
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Re: Frames and Resolution Handled by iMX, IPU

titusstalin — Wed, 14 Dec 2016 08:57:28 GMT

Thanks igorpadykov.

Okay then let me try 1208x1208 and update you.

Re: Frames and Resolution Handled by iMX, IPU

titusstalin — Wed, 14 Dec 2016 10:22:26 GMT

Hi igorpadykov,

Still I'm facing some issues with 1208x1208, in between 8bytes data are missed so I tried 1216x1216, getting complete data but it has issues with alignment.

Ex: The data starts at 0x55, 0x65, 0x75, but in received frame, I've got the end portion of frame.

Received:

Last portion

First portion

Middle portion

Expected:

First portion

Middle portion

Last portion

What could be the problem ?

2) I want to disable the Threshold (TH and THE bits) and in CPMEM to see any behavior for this changes.

How can I change that registers and where I need to do this ?

Table 37.14, page no 2764, .MX6DQ RM

drivers/mxc/ipu3/prg.c ??

Re: Frames and Resolution Handled by iMX, IPU

titusstalin — Mon, 19 Dec 2016 10:15:55 GMT

Any help on this post ?

Thanks for your support.