i.MX Processors中的主题 Re: camera frame rate is too low.

camera frame rate is too low.

yibhan — Thu, 18 Jun 2020 23:32:00 GMT

Hi guys,

I have concern about cemera performance especially frame rate. I am using UVC(USB Video Class), but I think it doesn't matter.

My board has a frame rate problem, but freescale reference board doesn't.

when camera app is launched, it also take a long time and frame rate is too low. I have used same camera app with my board and freescale board. It is not related with camera app.

I have suspicious logs from dmesg, I have no idea where I should debug some of functions. Please let me guide.

Re: camera frame rate is too low.

yibhan — Thu, 18 Jun 2020 23:34:01 GMT

Hi guy,

I have mistype on previous my comments.

==============================

I have suspicious logs from dmesg,

-> I haven't shown suspicious logs from dmesg.

===============================

Re: camera frame rate is too low.

Bio_TICFSL — Fri, 19 Jun 2020 13:28:58 GMT

Hello Yibeom,

If your camera is tested with EVB from NXP and it doesn´t seem to be wrong, then you must checked the DDR connections and do:

https://community.nxp.com/docs/DOC-105652

Regards

Re: camera frame rate is too low.

yibhan — Wed, 24 Jun 2020 00:31:49 GMT

Hello Bio_TICFSL,

I hava ddr test results, but I have no idea where I manually update the test results.

Could you let me know source code location and how to update it?

Re: camera frame rate is too low.

Bio_TICFSL — Wed, 24 Jun 2020 14:26:36 GMT

Here you see how the ddr stress tool can be used:

https://community.nxp.com/docs/DOC-105652

Re: camera frame rate is too low.

yibhan — Wed, 24 Jun 2020 23:22:57 GMT

Thank you for answering.

I had already the ddr test results with DDR tools, but I don't know how to adapt them to my device.

Is there any no need to update ddr test results to my device? Or, let guide me in detail.

Thank you for advance.

Re: camera frame rate is too low.

yibhan — Fri, 26 Jun 2020 02:23:55 GMT

Hi Bio_TICFSL,

I am using Kernel_4.14.98, and u-boot source has plugin.s that includes ddr_setting.

Is there any need for me to calculate my ddr parameter?

Re: camera frame rate is too low.

yibhan — Fri, 26 Jun 2020 02:26:25 GMT

Hi Bio_TICFSL,

I have completed DDR test tools, in my understanding while in tool running, tools are trying to write DDR parameters to DDR.

If so, Could let me know how to rewrite a default DDR parameters to my DDR?

My SOC is imx6qp.