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Subject: Re: Linux Kernel 5.2.8 (uvc or i915? <<<)
References: <CAONH+Jm-O6=DQ+K2n5pNTNMg2Sq1KcVNFLuweVh6W82OPEFJoQ@mail.gmail.com>
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 <CAONH+JnZpbpdiwdajP7ke7X7wQGU7m4YoyZRDbLHKmRufkD6mQ@mail.gmail.com>
Cc:     Nathaniel Russell <naterussell83@gmail.com>,
        LKML <linux-kernel@vger.kernel.org>,
        linux-media <linux-media@vger.kernel.org>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        intel-gfx <intel-gfx@lists.freedesktop.org>
From:   Randy Dunlap <rdunlap@infradead.org>
Message-ID: <5d637638-12d1-6c39-8f76-824a0e875feb@infradead.org>
Date:   Thu, 15 Aug 2019 20:10:03 -0700
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[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@infradead.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?
>>
>>
>> @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/
>>
>>
>> thanks.
>> --
>> ~Randy
>>


-- 
~Randy