drm: rcar-du: Consider plane to CRTC associations in the plane allocator

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Hardware planes are driven by the timing generator of the CRTC they are
associated to. Changing the association requires restarting the CRTC
group that the plane belongs to, resulting in flicker on the other CRTC.

To avoid flicker as much as possible, try to allocate planes first from
the free planes already associated with the target CRTC. If allocation
fails then fall back to allocation from all free planes.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

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Laurent Pinchart 2015-04-29 00:51:01 +03:00

parent 2a57e9b5af

commit c8af99b604

1 changed files with 21 additions and 1 deletions

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drivers/gpu/drm/rcar-du/rcar_du_kms.c

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