[Intel-gfx] [PATCH v3 2/2] drm/i915/skl: distribute DDB based on panel resolution

[Maarten Lankhorst]

Op 01-08-18 om 17:11 schreef Chris Wilson:
> Quoting Mahesh Kumar (2018-08-01 16:11:13)
>> We distribute DDB equally among all pipes irrespective of display
>> buffer requirement of each pipe. This leads to a situation where high
>> resolution y-tiled display can not be enabled with 2 low resolution
>> displays.
>>
>> Main contributing factor for DDB requirement is width of the display.
>> This patch make changes to distribute ddb based on display width.
>> So display with higher width will get bigger chunk of DDB.
>>
>> Changes Since V1:
>>  - pipe_size/ddb_size will not overflow u16 so use appropriate
>>    data-types during computation (Chris)
>> Changes Since V2:
>>  - avoid redundancy and possible truncation errors (Chris)
>>
>> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107113
>> Cc: raviraj.p.sitaram at intel.com
>> Cc: Chris Wilson <chris at chris-wilson.co.uk>
>> Signed-off-by: Mahesh Kumar <mahesh1.kumar at intel.com>
> Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
> -Chris
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Thanks, reviewed and pushed. :)