i.MX ProcessorsのトピックRe: imx8qm mipi csi raw12 Data Storage Problem

imx8qm mipi csi raw12 Data Storage Problem

zoro_li — Fri, 07 Jan 2022 12:46:23 GMT

Now I can get the RAW12 data on IMX8QM。

Use this way : sensor -> mipi csi (raw12) -> isi (raw16) -> user

But I found that data seems to have problems.

For example, Sensor raw data is 0x1234, but I get 0x3412，higher and low bytes have an interchange。

How can I modify to solve this problem?

Re: imx8qm mipi csi raw12 Data Storage Problem

joanxie — Mon, 10 Jan 2022 04:57:11 GMT

for imx8qm ISI, you need to shift,

• RAW10 {valid_data, 4’b0} . After right shift 4 bits, you will get the correct image.
• RAW12 {valid_data, 2'b0} . After right shift 2 bits, you will get the correct image.

Re: imx8qm mipi csi raw12 Data Storage Problem

zoro_li — Mon, 10 Jan 2022 05:23:05 GMT

hi joanxie:

Thanks for your replay.

Now my way is to swap high and low bytes and then right shift 2 bits to get correct image.

I don't know why I need to exchange high and low bytes of data here.

I feel that there are some problems here.

Re: imx8qm mipi csi raw12 Data Storage Problem

joanxie — Mon, 10 Jan 2022 06:02:18 GMT

you need to set 16bits as format, then shift two bits to get correct data, ISI doesn't have exchange issue, you need check your source code

Re: imx8qm mipi csi raw12 Data Storage Problem

zoro_li — Mon, 10 Jan 2022 06:09:29 GMT

hi:

My input and output configuration is as follows, is there any problem?

output:

{ + .name = "SBGGR12", + .fourcc = V4L2_PIX_FMT_SBGGR12, + .depth = { 16 }, + .color = MXC_ISI_OUT_FMT_RAW16, + .memplanes = 1, + .colplanes = 1, + .mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12, }

input:

{ + .name = "SBGGR12", + .fourcc = V4L2_PIX_FMT_SBGGR12, + .depth = { 16 }, + .memplanes = 1, + .colplanes = 1, }

Re: imx8qm mipi csi raw12 Data Storage Problem

joanxie — Thu, 17 Feb 2022 09:34:37 GMT

which file did you set this? is it the ISI file?

Re: imx8qm mipi csi raw12 Data Storage Problem

zoro_li — Sat, 26 Mar 2022 09:19:32 GMT

drivers/staging/media/imx/imx8-isi-cap.c

Re: imx8qm mipi csi raw12 Data Storage Problem

chendd14 — Tue, 20 Dec 2022 09:20:34 GMT

hi zoro_li,

I swaped the high and low bytes, and right shifted 2 bits, then I applied debayering with OpenCV cvtColor(..., ..., cv::COLOR_BayerBG2BGR). After that, I got a gray image., not a colorful one.

Would you please help me find out the problem?

Sensor: IMX577