Jetson AGX ported the TP2815 camera and could not find the /dev/video directory

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
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DTS Files
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-modify hardware/nvidia/platform/t19x/galen/kernel-dts/common/tegra194-p2888-0001-p2822-0000-common.dtsi adding the following line:

#include “tegra194-p3737-tp285x-modules.dtsi”
**LINE TO ADD ----->#include <t19x-common-modules/tegra194-p3737-0000-camera-tp2854vc-a00.dtsi>

-copy tegra194-p3737-tp285x-modules.dts into folder hardware/nvidia/platform/t19x/galen/kernel-dts/common/tegra194-p3737-tp285x-modules.dtsi

-copy tegra194-p3737-0000-camera-tp2854vc-a00.dtsiinto folder hardware/nvidia/platform/t19x/common/kernel-dts/t19x-common-modules/tegra194-p3737-0000-camera-tp2854vc-a00.dtsi

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Drivers
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-copy the content of drv folder into sources/kernel/nvidia/drivers/media/i2c/

-add the following defines to .config files and build the kernel
CONFIG_VIDEO_TP2854=y
CONFIG_VIDEO_TP2856_IOCTL=m

**-after boot manually load the module tp2856_ioctl.ko **

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Becauase one I2C address mapping to 4 video device, there are two drivers, one is TP2854 inside with kernel for VI port & virtual channel binding, no real I2C access, another is tp2856_ioctl, this is for chip config and video dectect, if customer want one fix format only, this is not in need, just write setting table via I2C。
tegra194-p3737-0000-camera-tp2854vc-a00.dtsi (92.7 KB)
tegra194-p3737-tp285x-modules.dtsi (2.0 KB)

tp2854.c (21.7 KB)
tp2856_ioctl.c (158.9 KB)

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I would like to ask why I can’t find the /dev/video device file, do I need support from other drivers, or if I haven’t created the device, thank you very much

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hello 1526166099,

please refer to tutorials page for training video.
for example,

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