i.MX ProcessorsのトピックRe: iMX8M Plus MIPI CSI Monochrome camera integration

iMX8M Plus MIPI CSI Monochrome camera integration

Dharanitharan — Fri, 24 Jun 2022 15:18:46 GMT

Hi,

I am trying to add two lane monochrome camera support to iMX8M Plus platform.

I tried to add changes to imx8-isi-cap.c and imx8-mipi-csi-sam.c files but i am not getting single frame.

The kernel version i am using is 5.4.

Could you please help me by providing patches for monochrome camera?

Re: iMX8M Plus MIPI CSI Monochrome camera integration

joanxie — Thu, 30 Jun 2022 10:34:27 GMT

what detailed format do you use, and pls share your modification here

Re: iMX8M Plus MIPI CSI Monochrome camera integration

Dharanitharan — Wed, 06 Jul 2022 14:40:19 GMT

Hi @joanxie

we are using 8 bit and 10 bit Gray format. The modifications are given in the attachment.

Re: iMX8M Plus MIPI CSI Monochrome camera integration

Dharanitharan — Fri, 08 Jul 2022 05:54:46 GMT

Hi @joanxie

Does iMX8M Plus support continuous mipi clock from sensor?

If yes, could you please provide us the kernel or device tree changes for continuous mipi clock support?

Re: iMX8M Plus MIPI CSI Monochrome camera integration

joanxie — Thu, 14 Jul 2022 09:28:34 GMT

current bsp support continuous clock as default, you can refer to that

Re: iMX8M Plus MIPI CSI Monochrome camera integration

Dharanitharan — Thu, 14 Jul 2022 09:47:33 GMT

Hi @joanxie

Can you please help us by provide the kernel or device tree change or register setting to change mipi clock mode either from continuous to non-continuous mode or from non-continuous to continuous mode?

I am trying integrating monochrome sensor with iMX8M plus. With that i can receive frames only on non-continuous mode.

In continuous we are not receiving single frame in platform side. But we can see stream while probing the camera.

And below are some of the details provided in data sheet.

NOTE: Notice : Almost MIPI CSI2 block uses “ByteClk” from D- PHY. This “ByteClk” is not continuous
clock. User has to assert software reset when Camera module is turned off.

Re: iMX8M Plus MIPI CSI Monochrome camera integration

joanxie — Sat, 23 Jul 2022 11:21:41 GMT

but I don't think current bsp supports non-continuous mode, do you mean you can set non-continuous mode on current bsp?

Re: iMX8M Plus MIPI CSI Monochrome camera integration

linda_zhang — Wed, 27 Jul 2022 09:17:34 GMT

We have two MIPI camera interfaces on our boards using with our MIPI camera modules.

Our kernel is 5.10.9.

http://www.myirtech.com/list.asp?id=670

You can contact to get some information if needed.

Re: iMX8M Plus MIPI CSI Monochrome camera integration

jiangyaqiang — Fri, 09 Sep 2022 08:51:38 GMT

HI Dharanitharan:

Have you solved the issue ? I'm also porting a monochrome camera to imx8mp kernel5.4, but fail to get frame too.

It's very appreciate if you can tell me how do you solved your issue.

Re: iMX8M Plus MIPI CSI Monochrome camera integration

Dharanitharan — Fri, 09 Sep 2022 12:46:14 GMT

Hi,

In our case, we changed the mipi clock source from continuous to gated. After that mipi-csi receiver in iMX8MP can able to receive frames.

Re: iMX8M Plus MIPI CSI Monochrome camera integration

jiangyaqiang — Tue, 13 Sep 2022 01:42:58 GMT

HI Dharanitharan:

Got it ,thanks.