On 12/13/2011 06:59 AM, Rob Clark wrote:
On Fri, Dec 9, 2011 at 4:59 AM, Inki Dae<inki.dae@xxxxxxxxxxx> wrote:
From: Joonyoung Shim<jy0922.shim@xxxxxxxxxxx>
The exynos fimd supports 5 window overlays. Only one window overlay of
fimd is used by the crtc, so we need plane feature to use the rest
window overlays.
This creates one ioctl exynos specific - DRM_EXYNOS_PLANE_SET_ZPOS, it
is the ioctl to decide for user to assign which window overlay.
btw, I think I will end up with a similar ioctl.. so thought I'd
double check for consistency, is zorder interpreted from back to front
or front to back? Ie. higher numeric value in front or behind of
lower numeric value? Are negative values permitted?
The zpos of exynos plane is just the index of overlay of exynos fimd or
exynos hdmi. 0 zpos means first overlay and 1 zpos means second overlay.
It isn't the priority value but higher zpos will have higher priority
generally.
A negative value -1 is defined to special value. A exynos crtc should
use one overlay and -1 zpos means the overlay that crtc uses.
Thanks.
BR,
-R
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