For the vendor-rk35xx kernel (6.1.115): an out-of-tree build of the vendor imx415 driver with a real 4K@60 mode, plus the overlay to bind it.

https://github.com/bambooCZ/rk3588-imx415-4k60

Edited October 5Oct 5 by Abdul Badalambadad

Hi Abdul, Nice work — the out-of-tree route is honestly the sane one for the vendor kernel. The imx415.c that ships in the 6.1 BSP is an old snapshot, and a couple of things in it bite people: the default mode it probes to is 4K@30, and the sensor's native 4K@60 mode exists in the table but needs the right link frequency and a 4-lane MIPI wiring to sustain ~890 Mbps per lane. If you copied the mode table from a Radxa overlay made for a 2-lane carrier, the driver will load fine and quietly negotiate 30 fps anyway, so it's worth checking the actual sensor-side rate with v4l2-ctl --get-fmt video0 on the sensor subdev, not just the capture node.
The other one that wastes days: media-ctl. The rkisp1 pipeline does not inherit formats — every pad (sensor → MIPI CSI2 → isp0) has to be set explicitly with matching formats, or you get a working probe and black frames. Once the mode is real, IMX415's rolling shutter at 4K@60 is quite usable for machine vision; we've shipped it in industrial RK3588 products. Lighting is the only thing that gets ugly — low light and 60 fps means short exposure, so expect to trade gain.
Thanks for publishing it properly with the overlay. That's the part everyone keeps in private forks.