i.MX ProcessorsのトピックRe: imx8dx linux driver v4l2 Support NV21 format

imx8dx linux driver v4l2 Support NV21 format

songhongliang — Tue, 09 Aug 2022 08:50:18 GMT

I now hope that the v4l2 driver of imx8dx can support the format of V4L2_PIX_FMT_NV21, how do I need to modify it to achieve this function. I see that the driver already supports the V4L2_PIX_FMT_NV12 format.

Thanks!

Re: imx8dx linux driver v4l2 Support NV21 format

joanxie — Thu, 11 Aug 2022 08:24:52 GMT

I don't know capture or output you mean, I assume that you mean capture, so do you mean your input video is format NV21?

Re: imx8dx linux driver v4l2 Support NV21 format

songhongliang — Thu, 11 Aug 2022 09:01:04 GMT

Yes, it is capture, I am using AHD to mipi chip bridge, I see that 9 capture formats are already supported in the imx8-isi-cap.c file, but format NV21 is not supported. I hope that the video stream in NV21 format can be directly obtained in the application.

Thanks!

Re: imx8dx linux driver v4l2 Support NV21 format

joanxie — Wed, 17 Aug 2022 09:58:53 GMT

the format from chip bridge is NV21 or you need to convert the input video to NV21?

Re: imx8dx linux driver v4l2 Support NV21 format

songhongliang — Thu, 18 Aug 2022 02:46:36 GMT

need to convert the input video to NV21

Re: imx8dx linux driver v4l2 Support NV21 format

joanxie — Mon, 29 Aug 2022 07:46:22 GMT

what is your real capture data? do you need convert raw data to NV12? if yes, you can use software ISP do this,

"https://www.nxp.com.cn/docs/en/application-note/AN12060.pdf"