[Intel-gfx] [PATCH v3 07/20] drm/i915: Rework plane readout.

[Maarten Lankhorst]

Op 14-07-15 om 11:53 schreef Daniel Vetter:
> On Mon, Jul 13, 2015 at 04:30:20PM +0200, Maarten Lankhorst wrote:
>> All non-primary planes get disabled during hw readout,
>> this reduces complexity and means not having to do some plane
>> visibility checks during the first commit.
>>
>> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> I still think calling readout_plane_state from the hw state readout code
> is the wrong approach. Instead we should consolidate all the plane
> readout code exclusively into a new intel_plane_readout_hw_state helper
> which is called only from driver load paths. That should also contain the
> fb/gem_bo reconstruction loop.
Is that a nack?

> For the other 2 users of this code (lid notifiery and resume) we should
> just force an unconditional plane restore by setting
> crtc_state->planes_chagned. But I thinkt hat's ok as some follow-up work,
> once atomic has settled a bit more.
>
If you want to force a plane restore, planes_changed won't do what you think it does.
planes_changed is a flag that says one or more planes were added to the crtc_state.

You want to do drm_atomic_add_affected_planes for that, and atomic resume would do that
since it duplicates all plane state.

~Maarten