How to implement the V4l2 camera control in IMX8M

reshwanth_r — Fri, 21 Dec 2018 06:07:55 GMT

I am using the ROCKO distribution of yacto bsp for IMX8M EVK board with default OV5640 camera. I can able to stream the camera with the default ov5640_mipi-v2.ko driver but the default driver does not support the V4L2 camera controls(like brightness, exposure) so i followed this link 1.12. V4L2 Controls — Linux Media Subsystem Documentation documentation and implement the controls. The implemented controls are registered without any error but when i tried to list the supported controls using "v4l2-ctl --list-ctrls" it does not display any controls.

When i tried to set the brightness by using "v4l2-ctl -c brightness=2" it shows unknown control. Is there any sample code or document available means, its really helpful.

Thanks & regards

Reshvanth

Re: How to implement the V4l2 camera control in IMX8M

igorpadykov — Mon, 24 Dec 2018 01:21:56 GMT

Hi Reshvanth

one can check linux/drivers/media/platform/imx8

imx8\platform\media\drivers - linux-imx - i.MX Linux kernel

and sect.6.1.4 MIPI Camera Serial Interface (MIPI CSI) attached Linux Manual.

Best regards
igor
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i.MX ProcessorsのトピックHow to implement the V4l2 camera control in IMX8M

How to implement the V4l2 camera control in IMX8M

Re: How to implement the V4l2 camera control in IMX8M