xf86-video-intel 2.0.0 and Xvideo

[Keith Packard]

On Thu, 2007-06-07 at 14:45 -0400, Ken Mandelberg wrote:
> I've ran into something I didn't expect. I've been doing video to the 
> vga or dvi output of my i915 laptop using the overlay adapter to get 
> brightness/contrast/etc .  I just switched over to the LDVS (disabling 
> the other monitors in xorg.conf), and found that I get nothing but blue 
> screen where the overlay should be on the display. In this configuration 
>   pipe A is shown as off, and the LDVS goes to pipe B.

This should be fixed as of a few days ago; switching outputs should move
the Xv overlay to the remaining active outputs.

> If I enable both the VGA and LDVS, the VGA gets A and the LDVS gets B 
> and overlay video only goes to VGA.

When both are active, you can change which shows the overlay by
manipulating the XV_PIPE Xv property.

> So can only pipe A do overlay video and the LDVS only can use pipe B?

The overlay can use either pipe. But, yes, the LVDS only uses pipe B.

> Are shaders for the textured adapter on anyones roadmap?

If you're interested in brightness/contrast, it should be fairly easy to
adapt the exsiting textured video code. The YUV->RGB conversion matrix
is found in i915_video.c as a set of twelve constants. Adjust these as
needed to change the conversion.

> In a somewhat unrelated question it appears to me that running VGA and 
> LDVS simultaneously gives you a cloned display with the resolution modes 
> of the LDVS. Are there any other options for running both at once?

Of course, you can explicitly control how the outputs are mapped to
crtcs with the RandR 1.2 extension.

-- 
keith.packard at intel.com
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