linux-kernel - Re: Linux Kernel 5.2.8 (uvc or i915? <<<)

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Date:   Fri, 16 Aug 2019 16:35:52 -0500
From:   Nathaniel Russell <naterussell83@...il.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-media <linux-media@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        intel-gfx <intel-gfx@...ts.freedesktop.org>
Subject: Re: Linux Kernel 5.2.8 (uvc or i915? <<<)

Kernel is the dmesg from the kernel I run on a daily basis.

On 8/16/19, Laurent Pinchart <laurent.pinchart@...asonboard.com> wrote:
> Hi Randy,
>
> On Thu, Aug 15, 2019 at 08:10:03PM -0700, Randy Dunlap wrote:
>> [adding mailing lists etc. with Nathaniel's test info]
>>
>> On 8/15/19 7:21 PM, Nathaniel Russell wrote:
>> > Well i surpressed the uvcvideo driver and you are right Randy it
>> > definitely is not the uvcvideo driver. There is something going on in
>> > the i915 driver.
>> >
>> > On 8/15/19, Randy Dunlap <rdunlap@...radead.org> wrote:
>> >> On 8/15/19 6:15 PM, Nathaniel Russell wrote:
>> >>> I would really like help with the kernel error with my uvcvideo
>> >>> driver.
>> >>
>> >> Hi again.
>> >>
>> >> What makes you think that the problem is related to the uvcvideo
>> >> driver?
>> >> Does some previous kernel version work correctly?  If so, what
>> >> version(s)?
>> >>
>> >>
>> >> Does this warning message only happen when the uvcvideo driver is
>> >> being
>> >> loaded?
>> >> Can you suppress loading of the uvcvideo driver to find out?
>> >>
>> >> Most of the problems/errors/warnings that I see are related to the
>> >> i915
>> >> driver:
>> >>
>> >> [   13.032341] timed out waiting for port C ready: got 0x20, expected
>> >> 0xe0
>> >> [   13.032872] WARNING: CPU: 1 PID: 239 at
>> >> drivers/gpu/drm/i915/intel_display.c:1597
>> >> vlv_wait_port_ready+0x99/0xe0
>> >> [i915]
>> >> [   13.033632] RIP: 0010:vlv_wait_port_ready+0x99/0xe0 [i915]
>> >>
>> >> although there are a few uvcvideo warnings:
>> >> [   13.039305] uvcvideo 1-5:1.0: Entity type for entity Extension 4 was
>> >> not
>> >> initialized!
>> >> [   13.039318] uvcvideo 1-5:1.0: Entity type for entity Extension 3 was
>> >> not
>> >> initialized!
>> >> [   13.039330] uvcvideo 1-5:1.0: Entity type for entity Processing 2
>> >> was not
>> >> initialized!
>> >> [   13.039339] uvcvideo 1-5:1.0: Entity type for entity Camera 1 was
>> >> not
>> >> initialized!
>> >>
>> >> Laurent, do you see any uvc issues here?  Any ideas/suggestions?
>
> No, uvcvideo seems completely reunlated.
>
>> >> @intel-gfx:  any ideas about what is going on here with the i915
>> >> driver?
>> >>
>> >> Original message to lkml:
>> >> https://lore.kernel.org/lkml/CAONH+Jm-O6=DQ+K2n5pNTNMg2Sq1KcVNFLuweVh6W82OPEFJoQ@mail.gmail.com/T/#u
>> >>
>> >> Previous message for 5.1.21 kernel:
>> >> https://lore.kernel.org/lkml/CAONH+JkTFujY9vEyNNuem+9rJ2qBKkf-PbKk9=DBSVEp6kW=yw@mail.gmail.com/
>
> --
> Regards,
>
> Laurent Pinchart
>

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