drm/omap: Use normalized zpos for plane placement
Planes with identical zpos value will result undefined behavior: disappearing planes, screen flickering and it is not supported by the hardware. Use normalized zpos to make sure that we don't encounter invalid configuration. Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com> CC: Tomi Valkeinen <tomi.valkeinen@ti.com> Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: NTomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180321102029.15248-7-peter.ujfalusi@ti.com
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