Re: [BUG] platform/x86: int3472/discrete: unknown GPIO type 0x08 breaks OV13858 rear camera on Surface Pro 11/12 Business (INT3472:00 / OVTID858)

[Sakari Ailus <sakari.ailus@linux.intel.com>]

Hi German,

On Thu, Sep 03, 2026 at 10:15:56AM +0200, German wrote:
> Hi,
> 
> On the Microsoft Surface Pro 11/12 Business (Intel Lunar Lake, IPU7),
> the rear camera sensor (ov13858, ACPI HID OVTID858) fails to probe.
> I've traced the root cause to int3472-discrete not recognizing one of
> the GPIO types described in the device's ACPI _DSM data, which leaves
> a power/reset-related GPIO unconfigured and the sensor unable to
> respond over I2C.
> 
> System
> ------
> - Surface Pro for Business 11th Edition with Intel (Intel Lunar Lake, IPU7)
> - Kernel: 7.2.2 (Arch Linux, vanilla)

It's usually best to test with linux-next, not with distro kernels, or in
this case, the media committers tree
<URL:https://gitlab.freedesktop.org/linux-media/media-committers> next
branch.

> - CONFIG_VIDEO_OV13858=m
> 
> Evidence
> --------
> 
>   $ dmesg | grep -iE "int3472|OVTID858"
>   [    5.555231] int3472-discrete INT3472:00: GPIO type 0x08 unknown; the sensor may not work
>   [    5.788882] ov13858 i2c-OVTID858:00: failed to find sensor: -5
>   [    5.789321] ov13858 i2c-OVTID858:00: probe with driver ov13858 failed with error -5
> 
> The "GPIO type 0x08 unknown" warning comes from the default case in
> skl_int3472_handle_gpio_resources() in drivers/platform/x86/intel/
> int3472/discrete.c:
> 
>     default:
>         dev_warn(int3472->dev,
>                  "GPIO type 0x%02x unknown; the sensor may not work\n",
>                  type);
>         ret = 1;
>         break;

This should be addressed by commit 34e31390a3b939db2e0cbfef4c40d95052572df0
.

-- 
Regards,

Sakari Ailus