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Thread: Intel Has Buggy HiZ Support Published

  1. #1
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    Default Intel Has Buggy HiZ Support Published

    Phoronix: Intel Has Buggy HiZ Support Published

    Chad Versace of Intel has published a set of nineteen patches to the Mesa mailing list that implement HiZ and depth resolve support for the Intel Linux graphics driver. Unfortunately, it's not without some regressions...

    http://www.phoronix.com/vr.php?view=OTkzOQ

  2. #2
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    Does it work for GM45?
    ## VGA ##
    AMD: X1950XTX, HD3870, HD5870
    Intel: GMA45, HD3000 (Core i5 2500K)

  3. #3
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    How does this affect performance?

  4. #4
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    HiZ usually gives a nice boost (up to 30% in R300g)
    ## VGA ##
    AMD: X1950XTX, HD3870, HD5870
    Intel: GMA45, HD3000 (Core i5 2500K)

  5. #5
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    Quote Originally Posted by darkbasic View Post
    Does it work for GM45?
    No, GM45 has no hardware support for HiZ. Ironlake (the successor) was the first to introduce it, but in a way that's not very useful; right now we're only targeting Sandybridge and Ivybridge.

  6. #6
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    HiZ is fairly effective at avoiding doing unnecessary work, and often gives a noticeable speedup.

    Which Intel IGPs support this?

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    Quote Originally Posted by Kayden View Post
    No, GM45 has no hardware support for HiZ. Ironlake (the successor) was the first to introduce it, but in a way that's not very useful; right now we're only targeting Sandybridge and Ivybridge.
    And what about h264 VA-API decoding? Do you know if there is someone still working on it?
    ## VGA ##
    AMD: X1950XTX, HD3870, HD5870
    Intel: GMA45, HD3000 (Core i5 2500K)

  8. #8
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    Quote Originally Posted by darkbasic View Post
    And what about h264 VA-API decoding? Do you know if there is someone still working on it?
    As far as I know, yes...though I can't say for sure as I'm not involved with media.

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