frame rate problem of MIPI camera

[kilsuhong]

Dear,

It's my first time to develop MIPI Camera

I managed to capture images on our platform, including MIPI CSI-2 interface,

but when checking frame rate, it measured about two over three (2/3) compared to original frame rate.

such as,

when frame rate is set to 30 fps, actual frame rate is measured about 20~21 fps.

For exact measurement, any file operation is not run, just only dequeue buffer from IPU.

The below is my command for frame rate measurement,

./mxc_v4l2_capture.out -iw 1280 -ih 720 -ow 1280 -oh 720 -i 1 -m 0 -fr 30

I don't know why the frame rate is matched with ISP.

Do you have any idea to improve frame rate of MIPI-CSI2 camera?

Thank you for your advice in advance.

(I have been developing my device based on BSP 4.1.0, kernel version 3.0.35)

[jimmychan]

what camera are you using?

[kilsuhong]

Dear jimmy,

I'm developing Fujitsu MBG043 ISP.

Fortunately, I found out that main clock provided by i.MX6 (csi_mclk) is not correct

After modifying main clock frequency,frame rate is operating normally.

Thank you for your interest.

[jimmychan]

Thanks for your reply. It helps if other meet the same issue.