On Mon, Dec 12, 2011 at 6:41 PM, Joonyoung Shim jy0922.shim@samsung.com wrote:
On 12/13/2011 06:59 AM, Rob Clark wrote:
On Fri, Dec 9, 2011 at 4:59 AM, Inki Daeinki.dae@samsung.com wrote:
From: Joonyoung Shimjy0922.shim@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.
I'm not sure that I quite understand that.. does that mean zpos=1 will be in front of zpos=0 (which would be in front of crtc, aka zpos=-1). Do you have a way to put overlays *behind* crtc layer (which presumably would be in some mode with an alpha channel?)
(IIRC, samsung has some public TRM type document.. if this is covered there, feel free to answer by just pointing me at the section I should read)
BR, -R
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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