From: Julian Margetson <runaway@candw.ms>
To: "Michel Dänzer" <michel@daenzer.net>
Cc: Alex Deucher <alexander.deucher@amd.com>,
Maling list - DRI developers <dri-devel@lists.freedesktop.org>
Subject: Re: [Powerpc] Sam460ex Canyonlands issue -Kernel 4.4.6-rc1
Date: Wed, 30 Mar 2016 06:36:02 -0400 [thread overview]
Message-ID: <56FBAC12.7080303@candw.ms> (raw)
In-Reply-To: <56FB4CC7.7040301@daenzer.net>
On 3/29/2016 11:49 PM, Michel Dänzer wrote:
> On 29.03.2016 18:55, Julian Margetson wrote:
>> On 3/28/2016 11:15 PM, Michel Dänzer wrote:
>>> On 29.03.2016 08:47, Julian Margetson wrote:
>>>> Seeing the following when booting kernel 4.6-rc1 on Acube Sam460ex
>>>> Canyonlands board.
>>>> This loops for a few times then the kernel boots.
>>>> No problem with the 4.6-rc1 with an A-eon Tabor Freescale e500v2 board.
>>>>
>>>> Regards
>>>>
>>>> Julian
>>>>
>>>>
>>>> [ 2.197839] ------------[ cut here ]------------
>>>> [ 2.197850] WARNING: CPU: 0 PID: 1 at
>>>> drivers/gpu/drm/drm_irq.c:1368 drm_vblank_off+0x2c/0x1e0
>>> That's
>>>
>>> if (WARN_ON(pipe >= dev->num_crtcs))
>>>
>>> My best guess is that drm_vblank_off is called before drm_vblank_init,
>>> so dev->num_crtcs is still 0.
>>>
>>>
>>> Please provide the full dmesg output corresponding to the problem.
>>>
>>>
>> Attached
> [...]
>
>> [drm] radeon: irq initialized.
>> [drm:r600_ring_test] *ERROR* radeon: ring 0 test failed (scratch(0x850C)=0xCAFEDEAD)
>> radeon 0001:81:00.0: disabling GPU acceleration
> Okay, so the problem is that acceleration fails to initialize, in which
> case the driver calls drm_vblank_cleanup.
>
> I can see two basic options for a solution: Either don't call
> radeon_irq_kms_fini/drm_vblank_cleanup if acceleration fails to
> initialize, or check if acceleration is enabled before calling
> drm_vblank_on/off. Any preferences?
>
>
Thanks
No preferences .
I would be interested in a fix for the acceleration problem if possible .
I am willing to test to try to determine the exact cause if you would
direct me .
Regards
Julian
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
next prev parent reply other threads:[~2016-03-30 10:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-28 23:47 [Powerpc] Sam460ex Canyonlands issue -Kernel 4.4.6-rc1 Julian Margetson
2016-03-29 3:15 ` Michel Dänzer
2016-03-29 9:55 ` Julian Margetson
2016-03-30 3:49 ` Michel Dänzer
2016-03-30 10:36 ` Julian Margetson [this message]
2016-03-31 6:50 ` Michel Dänzer
2016-03-31 10:00 ` Julian Margetson
2016-04-01 8:31 ` Michel Dänzer
2016-04-01 10:33 ` Julian Margetson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=56FBAC12.7080303@candw.ms \
--to=runaway@candw.ms \
--cc=alexander.deucher@amd.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=michel@daenzer.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.