Does xvmc HD work with i9xx?
seandarcy2 at gmail.com
Sun Apr 13 13:33:16 PDT 2008
From the mythtv list:
>The intel xvmc drivers only support up to 720x576 surfaces. So, they
>won't help for HD. Sorry about that.
>Where in the source did you find this limit? I see where it's defined
>for the i810 driver but I don't see anything for the i915 one.
>I'm looking in xf86-video-intel-22.214.171.1241/src/xvmc
>You have to look in the *_hwmc.c files in the ddx driver a directory
>above. The xvmc library talks to the ddx driver to setup each
>So, for the i915 that would be i915_hwmc.c. Once you are
>in the file just search for the XF86MCSurfaceInfoRec structure. That
>structure defines (among other things) the max width/height for each
>did a quick search through the documents at
>http://intellinuxgraphics.org/documentation.html and section 10.9.1.2
>in volume 2 seems to say HD is possible:
>"Therefore, for the 16-EU configuration, VLD hardware matches with the
>EU’s performance for SD contents. There is sufficient performance
>headroom for HD contents. For configuration with less EUs, VLD
hardware >has sufficient performance headroom for both SD and HD contents."
>The volume 1 document seems to say the current hardware is shipping
>with 8 EUs (section 126.96.36.199) so maybe it doesn't multiply out.
Is this correct? Also true for i945, i965 and 3100? Is the lack of xvmc
HD a driver issue, or a hardware issue ( 8 EU's etc )?
Oh, say it ain't so.
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