[PATCH 0/3] media: ov9734, ipu-bridge: Enable the camera on the Intel NUC M15

[Tin Posavec via B4 Relay]

Hi,

The camera on my Intel NUC M15 laptop (LAPRC710, Alder Lake-P, IPU6)
does not work with mainline. It is an OmniVision OV9734 (OVTI9734) whose
avdd supply and clock come from an INT3472 discrete device; its ACPI
device has neither _PS0 nor _PR0.

Patch 1 makes ov9734 defer its probe until ipu-bridge has created the
endpoint, patch 2 adds power on/off sequencing with runtime PM, and
patch 3 adds the sensor to ipu-bridge. The camera needs all three.

Tested on the NUC M15 with Ubuntu's 7.0.0-38 kernel (7.0.14) and the
series backported; the tested ov9734.c differs from this series only
by commit 7eef49c16461 ("media: v4l2-subdev: Add struct
v4l2_subdev_client_info pointer to pad ops"). The sensor streams
1296x734 SGRBG10 at 30 fps (libcamera, simple pipeline, software ISP);
it is powered off when idle, and s2idle works with the camera idle.
Not tested: S3, other boards, and kernels with lock debugging enabled.
v4l2-compliance: 45/46, the SUBSCRIBE_EVENT failure is pre-existing
(no V4L2_SUBDEV_FL_HAS_EVENTS).

I used an AI coding assistant (Claude Code) to track down the cause,
compare with how other sensor drivers handle this, and draft the
patches, hence the Assisted-by tags. I have gone through every change
myself, tested the series on this laptop, and I am responsible for the
result.

---
Tin Posavec (3):
      media: i2c: ov9734: Return -EPROBE_DEFER if no endpoint is found
      media: i2c: ov9734: Add power on/off sequencing support
      media: ipu-bridge: Add OV9734 sensor config

 drivers/media/i2c/ov9734.c           | 139 +++++++++++++++++++++++++++++++----
 drivers/media/pci/intel/ipu-bridge.c |   2 +
 2 files changed, 128 insertions(+), 13 deletions(-)
---
base-commit: d7e7bca7169873b46e857c025c10f3336c1258d8
change-id: 20261017-ov9734-ipu6-4dc9d1792c28

Best regards,
--  
Tin Posavec <tin.posavec04@xxxxxxxxx>