linux-kernel - Re: [PATCH 1/1] ACPI: scan: Ignore Dell XPS 9320 camera graph port nodes

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Message-ID: <CAJZ5v0itb45-hWS-JV5Nx8CQ7=CiS-dhJG8xJbrPNkY2=jN4jg@mail.gmail.com>
Date: Wed, 12 Jun 2024 12:25:55 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Hans de Goede <hdegoede@...hat.com>
Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>, Genes Lists <lists@...ience.com>, 
	"Rafael J. Wysocki" <rafael@...nel.org>, linux-kernel@...r.kernel.org, mchehab@...nel.org, 
	hverkuil-cisco@...all.nl, laurent.pinchart@...asonboard.com, 
	wentong.wu@...el.com, linux-media@...r.kernel.org, linux-acpi@...r.kernel.org, 
	"regressions@...ts.linux.dev" <regressions@...ts.linux.dev>
Subject: Re: [PATCH 1/1] ACPI: scan: Ignore Dell XPS 9320 camera graph port nodes

On Wed, Jun 12, 2024 at 12:08 PM Hans de Goede <hdegoede@...hat.com> wrote:
>
> Hi,
>
> On 6/6/24 8:12 PM, Hans de Goede wrote:
> > Hi,
> >
> > +To: Rafael since this was Cc-ed to linux-acpi but never send
> > to Rafael directly.
> >
> > Rafael this fixes a crash in 6.10-rc1 for some users and is necessary
> > to make the cameras work on the Dell XPS 13 plus 9320 .
> >
> > On 5/28/24 7:09 PM, Hans de Goede wrote:
> >> Hi Sakari,
> >>
> >> On 5/28/24 10:44 AM, Sakari Ailus wrote:
> >>> Ignore camera related graph port nodes on Dell XPS 9320. They data in BIOS
> >>> is buggy, just like it is for Dell XPS 9315. The corresponding software
> >>> nodes are created by the ipu-bridge.
> >>>
> >>> Signed-off-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
> >>> ---
> >>> Hi,
> >>>
> >>> Could you test this and see whether it fixes the warning?
> >>>
> >>> The camera might work with this change, too.
> >>
> >> Thank you I just received a Dell XPS 13 plus 9320 myself to use
> >> for VSC testing and I can confirm that with this patch 6.10.0-rc1
> >> works, including giving a picture with the libcamera software ISP +
> >> 3 small libcamera patches.
> >
> > I forgot to add:
> >
> > Tested-by: Hans de Goede <hdegoede@...hat.com>
> > Reviewed-by: Hans de Goede <hdegoede@...hat.com>
>
> I just hit the same problem on another Dell laptop. It seems that
> all Dell laptops with IPU6 camera from the Tiger Lake, Alder Lake
> and Raptor Lake generations suffer from this problem.
>
> So instead of playing whack a mole with DMI matches we should
> simply disable ACPI MIPI DISCO support on all Dell laptops
> with those CPUs. I'm preparing a fix for this to replace
> the DMI matching now.
>
> Rafael, please drop this patch, my more generic fix will replace it
> and backporting will be easier without having the intermediate fix
> in the middle.

Dropping, thanks!