Re: [PATCH v4] drm/i915: add support for Z-order of planes for VLV.

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On Mon, Mar 03, 2014 at 02:12:28PM -0800, yu.dai@xxxxxxxxx wrote:
> From: "Yu(Alex) Dai" <yu.dai@xxxxxxxxx>
> 
> Add "zorder" property to crtc to control Z-order of sprite and
> primary planes. The alpha channel of the planes can be enabled
> or disabled during Z-order change.

Can I just say that is an abonimal user interface. You expect the client
to encode a hw specific value into a CRTC property that affects global
state. and given the two properties on the two CRTCs, which should userspace
believe?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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