On 12/13/2011 06:59 AM, Rob Clark wrote: > On Fri, Dec 9, 2011 at 4:59 AM, Inki Dae<inki.dae at samsung.com> wrote: >> From: Joonyoung Shim<jy0922.shim at samsung.com> >> >> 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 > _______________________________________________ > dri-devel mailing list > dri-devel at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/dri-devel >
