Re: [RFC] drm/i915/skl: Use plane update function from mmio flips

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Hi,

On 04/21/2015 10:51 AM, Chris Wilson wrote:
On Tue, Apr 21, 2015 at 10:29:52AM +0100, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>

Avoids duplicating the code.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Sonika Jindal <sonika.jindal@xxxxxxxxx>
Cc: Damien Lespiau <damien.lespiau@xxxxxxxxx>
---
Can we do this?

Sure, but I'd like to see update_primary_plane split into two in that
case. One to precalcuate the parameters, then the second to apply them
as we skip the first here (due to doing the setup in process context)
and want the second to run inside the vblank evasion logic (and the
unbounded nature of the current update_primary_plane logic scares me).

What part is unbounded? I don't see anything blocking?

As a side note, watermarks seem to be not handled at all in the flip path as well...

Regards,

Tvrtko

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