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ecbcceea47
The IPUv3 overlay plane may be placed over or under the primary plane. Set the zpos of the primary to an immutable position of 1 to have the possibility to place the other plane underneath it. Set the zpos of other planes (the overlay plane) to a mutable value between 0 (the lowest possible value of a zpos) and directly above the primary plane with the latter being the default. Signed-off-by: Michael Tretter <m.tretter@pengutronix.de> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Link: https://patch.msgid.link/20260219-drm-imx-underlay-plane-v2-2-26ef829c5483@pengutronix.de