Linux 7.2 changed how the Intel CVS controller (ACPI INTC10E1 on Panther
Lake) appears to the IPU. ipu-bridge now places it between the sensor and
the IPU CSI2 receiver, like IVSC, and the new in-tree drivers/media/i2c/cvs
driver provides the matching "Intel CVS" V4L2 bridge sub-device. Our
out-of-tree vision-drivers intel_cvs has no sub-device and displaces the
in-tree module of the same name, so on 7.2 the sensor never joins the
media graph and the HAL reports "No sensors available". Both linux-ptl
7.2.3 and linux-omarchy 7.2.5 fail this way.
Ship the in-tree 7.2 CVS driver verbatim as DKMS module intel-cvs for 7.2+
kernels. Arch-derived kernel configs cannot enable CONFIG_VIDEO_INTEL_CVS
themselves: it sits under a menu hidden by MEDIA_HIDE_ANCILLARY_SUBDRV, so
olddefconfig drops it. Keep vision-drivers for kernels before 7.2. Both
dkms.conf files carry a BUILD_EXCLUSIVE_KERNEL regex that the pacman dkms
hook honours.
Teach the camera HAL about the bridge with upstream ipu7-camera-hal commit
f167239 (MediaControl routes the sensor link through "Intel CVS" and finds
the I2C bus through it) and add "Intel CVS" pad formats to the ipu75xa
ov08x40 config so link validation passes. Links stay sensor to CSI2 in the
config and are rewritten at runtime, so the same files work on 7.1.
Spencer Bull
5501e168f7