Op 14-09-16 om 14:36 schreef Mahesh Kumar:
> Hi,
> There was an issue with transition WM, it was getting enabled & causing fifo underrun.
> I fixed the condition, After that tested kms_plane & not getting any underrun.
> Please let me know if you see any other issue.
>
> Regards,
> -Mahesh
>
> On Tuesday 13 September 2016 06:10 PM, Maarten Lankhorst wrote:
>> Op 13-09-16 om 14:15 schreef Kumar, Mahesh:
>>> From: Mahesh Kumar <mahesh1.kumar@xxxxxxxxx>
>>>
>>> This patch implements new DDB allocation algorithm as per HW team
>>> suggestion. This algo takecare of scenario where we allocate less DDB
>>> for the planes with lower relative pixel rate, but they require more DDB
>>> to work.
>>> It also takes care of enabling same watermark level for each
>>> plane, for efficient power saving.
>>>
>>> Changes since v1:
>>> - Rebase on top of Paulo's patch series
>>>
>>> Changes since v2:
>>> - Fix the for loop condition to enable WM
>>>
>>> Signed-off-by: Mahesh Kumar <mahesh1.kumar@xxxxxxxxx>
>> I'm still getting underrun issues when running the entire patch series against kms_atomic_transition and kms_plane.
>> Can you confirm?
>>
>> ~Maarten
>
Found it..
During the test run:
# cat /sys/kernel/debug/dri/0/i915_ddb_info
Start End Size
Pipe A
Plane1 0 0 0
Plane2 30 890 860
Cursor 860 892 32
Pretty sure the start value here is bogus, and plane2 wm's end up overlapping with cursor.
~Maarten
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