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

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Message-ID: <Zmn-ZK_KCSLTtpOH@kekkonen.localdomain>
Date: Wed, 12 Jun 2024 20:00:36 +0000
From: Sakari Ailus <sakari.ailus@...ux.intel.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Hans de Goede <hdegoede@...hat.com>, Genes Lists <lists@...ience.com>,
	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

Hi Rafael,

On Wed, Jun 12, 2024 at 09:32:18PM +0200, Rafael J. Wysocki wrote:
> > This is the first time I hear about a boot failure due to incorrect camera
> > description (on production systems). Could you point me to where this has
> > happened?
> 
> https://lore.kernel.org/lkml/8afe9391b96ff3e1c60e624c1b8a3b2bd5039560.camel@sapience.com/
> 
> or is it not a boot failure?  If so, apologies for misunderstanding.
> 
> Looks serious enough to me though.

This warning comes from drivers/media/pci/intel/ivsc/mei_csi.c line 681 and
it is related to IVSC (Intel Vision Sensing Controller) present on some
systems with IPU6. The driver is necessary for the camera to work in these
systems but then again not all the necessary drivers were in place before
6.10 so this can't be said to be a regression.

The warning is made less verbose by commit
cc864821c7e8b921ebbfb21b17c92f8b3ea3d7ff (on Linus's tree).

-- 
Kind regards,

Sakari Ailus