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Thread: Community Beats AMD To New Radeon Audio Code

  1. #1
    Join Date
    Jan 2007
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    14,657

    Default Community Beats AMD To New Radeon Audio Code

    Phoronix: Community Beats AMD To New Radeon Audio Code

    It was just yesterday that I was writing about AMD still not having any new HDMI audio support code available to the public for the Radeon HD 5000 series and newer. The hold-up on this HDMI audio code for the open-source Radeon driver has been due to the patches failing to clear AMD's legal review multiple times. Well, leave it up the community, and now this morning there's some Evergreen patches for this support...

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

  2. #2
    Join Date
    Sep 2007
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    80

    Default Finally...

    This is AWESOME news.
    I've waited so long to finally see this. Thank you so much.

    Looking forward to see this code gets pulled into the kernel sources.

  3. #3
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    Aug 2009
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    Default

    Don't be too enthusiatic though. It's the same code as previous cards, so stereo-only.

  4. #4
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    Oct 2010
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    93

    Default

    Quote Originally Posted by Xavier View Post
    Don't be too enthusiatic though. It's the same code as previous cards, so stereo-only.
    Are you sure that the hardware supports PCM 7.1 or PCM 5.1 output over HDMI? My ATI 5650m only supports stereo output. On Windows, when 5.1 surround is selected, my receiver shows that the stream switched from PCM to DTS, so compression is needed for surround sound output. I achieved something similar in Linux by using the alsa a52 plugin.

  5. #5
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    Jan 2009
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    Default

    What? don't get enthusiastic :P though its not the best the card can do.. its better than no sound and twice as good as mono!

  6. #6
    Join Date
    Oct 2008
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    3,105

    Default Huh

    The first patch was 35 lines of new code and introduces a few new registers while the second patch was just a few lines of code.
    I looked and the patches basically came down to knowing about 10 magic numbers.

    Really, AMD, you couldn't release 10 numbers?

    Oh well, good work by the community here.


    Just for fun, here they are:
    0x5b0
    0x5b4
    0x5bc
    0x5e78
    0x00000071
    0x5ac
    0x01
    0x77
    0x7c30
    0x7d20
    0x30
    0x1000

    Hope i don't get sued.
    Last edited by smitty3268; 12-05-2011 at 01:22 AM.

  7. #7
    Join Date
    Aug 2009
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    28

    Default

    Quote Originally Posted by chenxiaolong View Post
    Are you sure that the hardware supports PCM 7.1 or PCM 5.1 output over HDMI? My ATI 5650m only supports stereo output. On Windows, when 5.1 surround is selected, my receiver shows that the stream switched from PCM to DTS, so compression is needed for surround sound output. I achieved something similar in Linux by using the alsa a52 plugin.
    I didn't know that. I looked at the specs and saw 5.1 was supoprted, I thought it was through native HDMI channels.

  8. #8
    Join Date
    Aug 2008
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    Default

    Hope i don't get sued.
    AMD won't be able to sue you.
    Their problem is that they might lose their HDCP license if information sufficient to subvert it gets published.

  9. #9
    Join Date
    Aug 2007
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    Default

    Really funny, when the complete hdcp encryption key is already known. hdcp is completely useless.

  10. #10
    Join Date
    Jul 2008
    Location
    Germany
    Posts
    662

    Default

    Quote Originally Posted by Kano View Post
    Really funny, when the complete hdcp encryption key is already known. hdcp is completely useless.
    And the Hardware for Realtime decode coast under 200$

    German news: http://www.golem.de/1111/87988.html
    http://www.heise.de/newsticker/meldu...z-1384461.html

    English http://www.h-online.com/security/new...n-1384543.html

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