4 lane MIPI CSI camera using CSI0 and CSI1 2 lane CSI

[user75354]

Hello team,

I have to interface 4 lane camera modules with Jetson Orin NX. In my custom carrier board we have two camera connector as cam0 (CSI 0 + CSI 1 ) and cam1 (CSI 2 + CSI 3 ) 4 lane CSI.

I am able to get camera streaming with cam0 (CSI0 2 lane CSI) and cam1( 4 lane CSI) camera. when I try to get streaming over cam0 as 4 lane , I am getting only black screen with error as “bwmgr api not supported”.

To support cam0 as 4 lane, I have updated below parameters num_lanes = 4, bus-width = 4, port-index=0 and tegra_sinterface = serial_a.

Can you please help me to solve this issue.

Thanks

[JerryChang]

hello user75354,

please aware there’s lane polarity, for instance, CSI0 D1 and CSI1 D0 P/N will always been swizzled for P/N.
please use device tree property, lane_polarity to configure a polarity swap on any lane.
you may see-also reference driver for using this property.
i.e. $public_sources/kernel_src/hardware/nvidia/platform/t23x/p3768/kernel-dts/cvb/tegra234-camera-rbpcv2-imx219.dtsi

[user75354]

hi @JerryChang

I have configured lane_polarity to 6, but still facing same issue while camera streaming.

Please find attached snippet of camera streaming.

[JerryChang]

hello user75354,

let’s narrow down the issue,
please check Applications Using V4L2 IOCTL Directly, please use V4L2 IOCTL to verify basic camera functionality.