I am trying to connect Jetson Nano to a custom board with ADV7482 chip using CSI-2 connectors and capture video. However, there is no driver available for ADV7482 in linux kernel 4.9.
I tried the following 3 approaches, without any success. It should be noted that in the custom board, ADV7482 is clocked and configured externally and there is no need to read or write any configuration from I2C. Therefore, in these approaches I ignored reads and writes from I2C. Here are the approaches:
From kernel 4.14 the driver of this chip is added to the kernel sources. However it cannot be compiled on kernel 4.9 due to the V4l2 API changes mainly because of using
fwnodein some parts. I commented the part that made compile errors. Now the code is compiled but
/dev/video0or any other similar device is not created. I tried both static and dynamic module modes because it’s noted in this post that dynamic modules my not work.
adv748x-hdmi.c (20.4 KB) (no changes)
adv748x-afe.c (13.3 KB) (no changes)
adv748x-csi2.c (8.3 KB) (commented line 293)
adv748x-core.c (24.5 KB) (ignoring reads and writes and hdmi and afe and txa)
adv748x.h.txt (13.1 KB)
Device Tree: tegra210-adv7482.dtsi.txt (5.7 KB)
There is an older driver which is mentioned in this post from Renesas Electronics. This driver is for kernel 3.x and again can’t be compiled . Again some parts commented out and similarly
/dev/video0is not created nor statically nor dynamically.
Source: adv7482.c (76.0 KB)
Device Tree: tegra210-adv7482.dtsi.txt (4.9 KB)
I tried to change the IMX219 sensor driver as in our scenario there is no need for configurations and only capturing the video is needed. So Again I ignored the parts writing to registers and instead of reads, passed the values manually where it was needed. This time
/dev/video0is created but capturing using v4l2-ctrl results in the following error in kernel :
Source: imx219.c (23.4 KB)
Device Tree: tegra210-camera-rbpcv2-dual-imx219.dtsi.txt (23.4 KB)
And here is the ADV7482 output video configuration :
- frame rate: 50 fps
- size: 720 x 576
- continuous clock