Re: [PATCH v12 5/7] drm/i915/skl: Ensure pipes with changed wms get added to the state

[Mike Lothian]

Hi

Is there any chance this could be removed from the upcoming drm-4.9
pull, at least until this issue has been fixed

Regards

Mike

On 21 September 2016 at 12:34, Mike Lothian <mike@xxxxxxxxxxxxxx> wrote:
> I've raised https://bugs.freedesktop.org/show_bug.cgi?id=97888 I'll
> attach the info you requested once I get back to my machine
>
> On 21 September 2016 at 07:56, Maarten Lankhorst
> <maarten.lankhorst@xxxxxxxxxxxxxxx> wrote:
>> Hey,
>>
>> Op 20-09-16 om 20:45 schreef Mike Lothian:
>>> Hi
>>>
>>> I've bisected back to this commit in the drm-intel-nightly branch
>>>
>>> 05a76d3d6ad1ee9f9814f88949cc9305fc165460 is the first bad commit
>>> commit 05a76d3d6ad1ee9f9814f88949cc9305fc165460
>>> Author: Lyude <cpaul@xxxxxxxxxx>
>>> Date:   Wed Aug 17 15:55:57 2016 -0400
>>>
>>>    drm/i915/skl: Ensure pipes with changed wms get added to the state
>>>
>>>    If we're enabling a pipe, we'll need to modify the watermarks on all
>>>    active planes. Since those planes won't be added to the state on
>>>    their own, we need to add them ourselves.
>>>
>>>    Signed-off-by: Lyude <cpaul@xxxxxxxxxx>
>>>    Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
>>>    Cc: stable@xxxxxxxxxxxxxxx
>>>    Cc: Ville SyrjÃlà <ville.syrjala@xxxxxxxxxxxxxxx>
>>>    Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
>>>    Cc: Radhakrishna Sripada <radhakrishna.sripada@xxxxxxxxx>
>>>    Cc: Hans de Goede <hdegoede@xxxxxxxxxx>
>>>    Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
>>>    Link: http://patchwork.freedesktop.org/patch/msgid/1471463761-26796-6-git-send-email-cpaul@xxxxxxxxxx
>>>
>>> The symptoms I'm seeing look like tearing at the top of the screen and
>>> it's especially noticeable in Chrome - reverting this commit makes the
>>> issue go away
>>>
>>> Let me know if you'd like me to raise a bug
>> Please do so, it's nice to refer to when making a fix for it.
>>
>> Could you attach the contents of /sys/kernel/debug/dri/0/i915_ddb_info for working and not-working in it?
>>
>> ~Maarten