regression on Carrizo display bringup
michel at daenzer.net
Tue Nov 14 15:38:35 UTC 2017
On 14/11/17 03:37 PM, Tom St Denis wrote:
> On 14/11/17 09:36 AM, Harry Wentland wrote:
>> On 2017-11-14 08:30 AM, Tom St Denis wrote:
>>> Hi all,
>>> Found when testing the tip of drm-next on my A12-9800 Carrizo.
>>> [root at carrizo linux]# git bisect good
>>> 138a3358c17918bb5cd5aa1ea9e8760ac69c515d is the first bad commit
>>> commit 138a3358c17918bb5cd5aa1ea9e8760ac69c515d
>>> Author: Yongqiang Sun <yongqiang.sun at amd.com>
>>> Date: Tue Nov 7 11:01:34 2017 -0500
>>> drm/amd/display: Optimize programming front end
>>> In case of update type is medium, optimize squence,
>>> reduce programing time.
>>> Change-Id: Ib1793408897b0c4d4a64434c239c3703d43e83d9
>>> Signed-off-by: Yongqiang Sun <yongqiang.sun at amd.com>
>>> Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
>>> Acked-by: Harry Wentland <harry.wentland at amd.com>
>>> :040000 040000 8d62da91eddb89e8152b46cce5c1c8aa8edb80bf
>>> c377c5887076041e5a61640e78be756af48001ff M drivers
>>> When I load amdgpu I get a screen that is mostly white with red bars
>>> and then some noise. Nothing shows up in my dmesg log that is
>>> specific to this error.
>>> When I load X it seems like it's working though. I do get noise when
>>> I resize mpv from full to windowed (and back) but it goes away.
>> We've had a ton of fallout from this change. Can you open a Jira
>> ticket and queue it to us?
> Sure will do.
FWIW, I was seeing similar symptoms on Tonga, except even Xorg didn't
always display correctly; sometimes it only started displaying correctly
once a client used page flipping.
Anyway, it's fixed for me with the latest DC commits which were missing
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
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