[Intel-gfx] [RFC][PATCH 14/14] WIP/drm/i915: Nuke posting reads from plane updates

[Maarten Lankhorst]

Op 17-03-17 om 23:12 schreef Chris Wilson:
> On Fri, Mar 17, 2017 at 11:18:08PM +0200, ville.syrjala at linux.intel.com wrote:
>> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>>
>> We'll maybe want just one posting read at the end? This does seem to
>> potentially shave a few usec off from the update.
> They are all superfluous until proven otherwise. The only cases where I
> would (quietly) argue for a post is before a latch (to document the
> serialisation of the latch with the controls that go before) and before
> completing the transaction and waiting for the hw/irq.
> -Chris
>
Patch series look sane, but didn't review extensively for errors.

Was considering doing patch 13 myself, but didn't have the courage to.

Acked-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>