Re: [PATCH v3] media: ipu-bridge: do not use the CVS device lookup for IVSC

[Thorsten Leemhuis]

On 9/2/26 23:15, Sergey Zagursky wrote:
> Since commit c6b1b34b5090 ("media: pci: intel: Add CVS support for IPU
> bridge driver") the internal camera no longer works on laptops where the
> sensor sits behind an IVSC, for example a Dell XPS 16 9640 (IPU6,
> INTC10CF, ov02c10):
> 
>   intel-ipu6 0000:00:05.0: Found supported sensor OVTI02C1:00
>   intel-ipu6 0000:00:05.0: Connected 1 cameras
>   ivsc_csi intel_vsc-92335fcf-3203-4472-af93-7b4453ac29da: mei-csi probed
>       without device fwnode!
> 
> No sensor subdevice is registered, the media graph has no sensor entity
> and userspace finds no camera at all.

For the record: Linus pulled this directly from the list into mainline
yesterday after I pointed to this patch in a small regression report, as
I had seen multiple people reporting a regression who confirmed that
this patch fixed things for them.

Bypassing subsystems like this has obvious downsides and risks; hence,
if that got something on the wrong track, please speak up -- or ideally
send patches to set things straight again in mainline.

https://git.kernel.org/torvalds/c/856c562c94964a74f63c6d5f38a1509a59a2357d
/
856c562c94964a ("media: ipu-bridge: do not use the CVS device lookup for
IVSC") [v7.3-rc3]

Ciao, Thorsten