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OV02C10 26 MHz Clock Fix (DKMS)

Test fix for Samsung Galaxy Book 3/4 models with Raptor Lake IPU6 where the OV02C10 camera sensor fails to probe with:

ov02c10 i2c-OVTI02C1:00: error -EINVAL: external clock 26000000 is not supported

What this fixes

The upstream kernel's ov02c10 driver only accepts a 19.2 MHz external clock. Raptor Lake IPU6 provides 26 MHz instead. This DKMS module patches the driver to accept both frequencies.

Based on the patch from: https://lore.kernel.org/linux-media/CAKP_te-WT+HTEyhSvQ3snEOaTp5B1OUL18JjuzO238=_fTOuXQ@mail.gmail.com/

Requirements

  • Linux kernel with in-tree ov02c10 driver (kernel 6.8+)
  • dkms and kernel headers (the install script will try to install these)
  • Samsung Galaxy Book with Raptor Lake IPU6 + OV02C10 sensor

Install

sudo bash install.sh

Verify

After installing, check that the driver loaded without the clock error:

dmesg | grep -i ov02c10

You should no longer see external clock 26000000 is not supported.

Uninstall

sudo bash uninstall.sh

This removes the DKMS module and restores the stock kernel driver.

How it works

The only change from the stock driver is in the ov02c10_probe() function:

// Stock driver:
if (freq != OV02C10_MCLK)  // OV02C10_MCLK = 19200000

// Patched driver:
if (freq != OV02C10_MCLK_19_2MHZ && freq != OV02C10_MCLK_26MHZ)

This is the exact same fix proposed in the upstream kernel mailing list patch.