Requesting support for OmniVision OV5678 sensor (ACPI ID: OVTI5678) used in Lenovo IdeaPad Duet 5 12IRU8 and other recent 2-in-1 laptops.

[hokgt]

Hardware Information

• Laptop: Lenovo IdeaPad Duet 5 12IRU8 (Model 83B3)
• Operating System: Fedora Linux (kernel 6.17.9-300.fc43.x86_64)
• Camera Sensor: OmniVision OV5678
• ACPI Device ID: OVTI5678
• I2C Bus: i2c-3 (i2c_designware.3, address 0x36 likely)
• Camera PMIC: TPS68470 (INT3472)
• IPU: Intel IPU6

Camera Specifications

According to Lenovo specifications:

• Front Camera: 5MP Fixed-Focus with IR support (for Windows Hello)
• Rear Camera: 5MP Auto-Focus
• Sensor Type: RGB-IR (Bayer 4x4 format, similar to OV01A1S)

Current Status

Hardware Detection ✅

$ ls -la /sys/bus/i2c/devices/ | grep OVTI
i2c-OVTI5678:00 -> .../i2c-3/i2c-OVTI5678:00

$ cat /sys/bus/i2c/devices/i2c-OVTI5678:00/modalias
acpi:OVTI5678:

$ cat /sys/bus/i2c/devices/i2c-OVTI5678:00/waiting_for_supplier
0

IPU6 Infrastructure ✅

All required components are loaded:

• ✅ intel_ipu6 and intel_ipu6_isys
• ✅ ivsc_csi and mei_vsc
• ✅ intel_skl_int3472_tps68470, tps68470_regulator, clk_tps68470
• ✅ IPU6 firmware present in /lib/firmware/intel/ipu/
• ✅ IPU6 camera HAL installed

Missing: Sensor Driver ❌

No driver in the mainline kernel or ipu6-drivers repository supports OVTI5678.

What I've Tried

I created a custom driver by adapting ov01a1s.c:

1. Changed ACPI ID to OVTI5678
2. Renamed all symbols from ov01a1s to ov5678
3. Compiled, signed (Secure Boot), and loaded successfully

Result

The driver loads and recognizes the device:

$ modinfo ov5678 | grep alias
alias:          acpi*:OVTI5678:*

$ lsmod | grep ov5678
ov5678                 24576  0

However, probe fails at hardware configuration check:

$ sudo dmesg | grep ov5678
ov5678 i2c-OVTI5678:00: failed to check hwcfg: -517

Analysis: Error -517 (EPROBE_DEFER) occurs in the ov5678_check_hwcfg() function. The ov01a1s-based driver expects different hardware resources than what OV5678 actually needs:

• Clock frequencies
• Regulator names/voltages
• GPIO configurations
• ACPI _DSM method parameters

Request

Could you please add official support for the OV5678 sensor to ipu6-drivers?

I've gotten 90% of the way there - the entire stack is working and the driver successfully binds to the device. The remaining 10% requires OV5678-specific hardware configuration that needs:

• OV5678 sensor specifications (clock rates, power requirements)
• Correct regulator/GPIO mappings
• ACPI configuration specific to this sensor

Affected Devices

The OV5678 sensor (OVTI5678) is used in:

• Lenovo IdeaPad Duet 5 12IRU8 (my device)
• Dell Latitude 7320 (mentioned in issue Add support for OV5678 sensor #24)
• Likely other recent Intel-based 2-in-1 convertibles with Windows Hello

Additional Context

Reference: Issue #24 also mentions OV5678 support needed for Dell Latitude 7320.

Technical Notes:

• OV5678 uses similar RGB-IR Bayer 4x4 format as OV01A1S
• Based on Lenovo specs, it's a 5MP sensor with dual RGB-IR capability
• Hardware dependencies (INT3472 PMIC) are already met

Files Available

I can provide:

• Complete ACPI DSDT tables (/tmp/dsdt.dsl)
• Custom driver source (ov5678.c)
• Full dmesg output
• Hardware topology information
• Any additional debugging information needed

Workaround

None available. Camera is completely non-functional on Linux without proper driver support.

Willingness to Help

I'm happy to:

• Test patches
• Provide debugging logs
• Test different configurations
• Contribute to driver development if guidance is provided

Thank you for maintaining this project!

[mdjait]

Hello @hokgt thank you for the detailed description!

could you please send me an email to mehdi.djait@linux.intel.com

We need a more interactive channel to discuss a possible solution I may have to this issue.

I will of course update here if the driver works.